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PC Series Manual - Nordic Geothermal Heat Pump

1. The diagram above shows a common technique for installing supply ducts in the pool room area Dry air is directed upward over the windows A B C and As the air picks up moisture from the pool room it is drawn towards the return air grill E where it re enters the pool conditioner Air is released over the glass and drawn to the return air grill of the PC with as little travel as possible over the pool surface Supply ducts F are located below the concrete pool decking and insulated with waterproof closed cell or Styrofoam insulation so that the distribution air is relatively the same temperature throughout the entire length of the building Floor diffusers G should be placed close to the windows and be wide enough to direct air over the entire glass surface to ensure that no condensation occurs in corners or on the lower levels of the glass Supply air S pr 255 m EREN T ee zc 7 E 1 The diagram above shows another possible technique for installing supply ducts pool room area Dry air is directed downward over windows A B C and D As the air picks up moisture from the pool room it is drawn towards the return air grill E where it renters the pool conditioner once more In each case air is rel
2. 114 O O 78 80 82 84 86 88 02 04 NO ISSUE 03 17 NOV 2014 Page 17 001427MAN 01 TABLE 13 ACTIVITY FACTOR AF _Application 5 Residential itness Club Condiminium Therapy Aquafit Elderly Swim F Hotel Sc 0 Public Pool 0 Spas and Whirlpools DUCT SYSTEMS GENERAL The duct system should be constructed of standard galva nized sheet metal such as would be used for a typical residen tial heating system All joints should be sealed with an ap proved duct sealant to ensure there are no leaks in the system A duct system capable of supplying the required air flow is of utmost importance Maritime Geothermal Ltd recommends that the static pressure be kept below 0 2 inches of water total To mimimize the fan power required by the unit Itis VERY IMPORTANT that all turns in both the supply trunks and the return trunks be made with TURNING RADII Air act like a fluid and just like water pressure drop is increased when air is forced to change direction rapidly around a sharp or irregular corner It is recommended that flexible collars be used to connect the main trunks to the heat pump This helps prevent any vibra tions from travelling down the ductwork If a plenum heater is installed the collar should be at least 12 away from the heater elements The first 5 10 feet of the main supply tru
3. EREE enia essi inu esae n S sse ain epo ri EA Page 18 aii pico i a ree eee Page 18 Plenum Heater e 18 ee ee 19 YUN ty GU aia ars Page 22 STARTUP PROCEDURE case 23 Pre start INSHOCHON HR Page 23 oUt rete atest P Page 23 Page 25 GENERAL MAINTENANCE 0520 ela e noie suos PAGE 26 TROUBLESHOOTING GUIDE 5 25 52 5556855025 9 2 EU Rx PAGE 27 Repar POCE ES KG Page 38 Refrigeration 55 2 54 rena REE NEEE Eran Eaei Page 39 MODEL SPECIFIC INFORMATION nssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn PAGE 42 Hetrigerant Charge EEn ERE REA ERREA Page 42 5
4. Page 12 Diagram E Floor Supply Ducts with Elevated Return 20 2 0 122 Page 21 Diagram Elevated Supply Ducts with Elevated Return Page 21 Case M Page 49 DRAWINGS 001045CDG PC Unit Cold Water Cooling Connections Page 15 001032CDG Typical Duct and Condensate Connections PC Unit Page 20 000352RCD PC Series Refrigeration Circuit Diagram Pool Heat Mode Page 39 000353RCD PC Series Refrigeration Circuit Diagram Air Re Heat Mode Page 40 000354RCD PC Series Refrigeration Circuit Diagram Air Cooling Mode Page 41 000145CDG PC Series Controls Connection Diagram for ECM Fan Page 44 001423SCH PC 1S T DE Schematic Diagram 011212211 Page 45 001424ELB PC 1S T DE Electrical Box Diagram 2 2 2 Page 46 001425SCH PC 6S T DE Schematic Diagram Page 47 001426ELB PC 6S T DE Electrical Box Diagram 22 222 1 Page 48 ISSUE 0
5. gt lt gt lt gt lt gt lt gt lt gt lt x x X e Dehumidification occurs anytime the unit is operational Ensure the cooling setpoint is equal to or higher than the heating setpoint to avoid these conditions Ccooling has priority should these conditions occur but the plenum heater will still activate anytime Air Aquastat Stage 2 is on 001427MAN 01 Page 8 ISSUE 03 17 NOV 2014 DIAGRAM A PC Control System Flow Chart Priority Jumper Placed without A C De Pool Air Air humidistat Aquastat Aquastat Aquastat STAGE 1 amp 2 STAGE 1 STAGE 2 Pool Water OFF Heat Mode PC Unit OFF lt gt Air Re heat Mode Electric Plenum Heat DIAGRAM B PC Control System Flow Chart Priority Jumper Placed with A C De Pool Air Air humidistat Aquastat Aquastat Aquastat STAGE 1 2 STAGE 1 STAGE 2 Electric Plenum Heat Air Cool Aquastat STAGE 1 amp 2 PC Unit OFF _ _ Air Re heat Pool Water on Mode Heat Mode A C Mode ISSUE 03 17 NOV 2014 Page 9 001427MAN 01 001427MAN 01 SYTEM OPERATION PRIORITY JUMPER NOT PLACED The primary purpose of the pool conditioner unit is to main tain proper humidity levels in the pool room During this opera tion energy is removed from the ai
6. sosise n Page 42 2 EE DO 42 ciego E 43 Electrical Diagrams Controls Connections Page 44 Electrical Diagrams 230 11 60 Page 45 Diagrams 2201 50 C a E ses ede Page 47 49 APPENDIX A Control Board Specifications 51 APPENDIX B ECM Fan Airflow Tables 2 2 22 1 PAGE 52 APPENDIX Ranco Aquastat Instructions PAGE 53 WARRANTY INFORMATION 151159 rn 56 001427MAN 01 Page 4 ISSUE 03 17 NOV 2014 Tables Diagrams Drawings TABLES Table 1 Control Signal Description a Dna Cu o od usos d gue pav uu TEE su Deu sce Ua Page 6 Table 2 Typical PC con
7. RS DU FUE 6 Control MOUNTING LOCATIONS Page 7 System Operation Priority Jumper Placed Page 7 System Operation Priority Jumper Not Page 10 Fan 13 COMOL Trans OMET 13 Salely CONOIS ans 8 13 Pool Circulator Pump CONWON sse 13 AiG Option Outdoor Condenser ua gu eutus oq e 14 Option Cold Water 14 Fan OPON 14 SIZING AND DUC ey OR 16 POOL SUIC ATEI IDOL 16 med SINO Page 16 Duct SYSTEMS General 18 SUDDIY DUCE System ii
8. is energized but the unit continues to heat instead of cool High delta T fan appears to be vis ually or audibly slower than normal Outdoor air temperature too hot Visually inpsect Replace solenoid if faulty Replace reversing valve Refer to the outdoor condenser unit s manual Shut unit off until outdoor air is cooler Clean as per instructions in the outdoor unit s manual Unit is overcharged Only possible if unit has been opened in the field and incorrectly charged 001427MAN 01 High sub cooling low delta T across water coil Page 34 Remove 1 2lb of refrigerant at a time and verify that the discharge pressure reduces ISSUE 03 17 NOV 2014 OPERATION TROUBLESHOOTING AIR COOLING MODE A C continued Possible Cause Recommended Action High Suction Pressure may appear to TXV adjusted too far Leaking check valve be tween water condenser and receiver inlet Leaking check valve be tween air condenser and receiver inlet Leaking reversing valve RV 1 2 Faulty compressor pumping Low Suction Low or no PC unit airflow Pressure TXV stuck almost closed or partially blocked by for eign object Low or no refrigerant charge Faulty compressor not pumping Verify superheat It should be be tween 8 12 F 3 6 C Superheat will be low if TXV is open too far Adjusting the TXV does not affect the superheat o
9. Compressor Accumulator 170 Plantation Rd a Chris Geddes itcodi ERN MARITIME GEOTHERMAL m 6 Chris Geddes Drawina N 11 Approved ENG rawing Name PC Series Refrigeration Circuit Diagram Chri HN A Chris Geddes Air Cooling Mode ECO 4 IMPL BY APVD BY DATE A 000354RCD 01 1 of 1 Page 41 001427MAN 01 ISSUE 03 17 NOV 2014 Model Specific Information This section provides general information particular to each model For complete specifications please see the specifications document for the desired model REFRIGERANT CHARGE CHART SHIPPING INFORMATION Las EN 12 0 5 System contains POE oil CAPACITY RATINGS The tables below depict the results of standard capacity rating tests done at the temperatures indicated in the table TABLE 18 PC Unit Capacity Ratings 60Hz Moisture Moisture Typical Indoor Pool Indoor Pool Ai Input irflow Capacit Removal Removal Pool Surface Flow Pressure Drop Energy 50 RH 60 RH Modei Ls PSIG kPa CFM Us QW Leskon t m 45 17 5 21 1 32 1 5 10 3 1 200 566 2 020 46 000 13 4 14 6 4 18 8 2 600 56 2 2 15 2 1 500 708 64 200 18 8 19 8 6 23 10 4 800 74 65 29 1 35 2 21 2 8 19 3 1 900 897 4 045 77 000 22 7 24 10 9 30 13 6 1
10. A 24VAC control signal MAX 0 5A can be obtained to operate a dry contact such as a contactor to supply power to the circulator pump or a relay to make a low voltage signal This can be accomplished with the addition of a SPDT relay MARSII 92370 as an example CONTROL RELAY and DRY CONTACT either a second SPDT relay or a 24VAC contactor A contactor could be used to provide a parallel high voltage power supply to a single stage pump or to power the second stage of a two stage pump depending on how the stages are controlled AN SPDT relay could be used to make or break a signal to engage second stage on a two stage pump depending on how the stages are controlled or to switch setpoints on a variable speed pump 13 001427MAN 01 Table 7 lists connections required to set up control circuit The DRY CONTAC coil is energized whenever the PC unit is is pool heat mod Y on O off TABLE 7 Pool Circulator Control Wiring _ PC unit Control Relay m pin 4 PC unit Control Relay Coil pin 3 Punt Contr Retay Col pin Control Relay NC pin 5 24VAC coil high voltage contactor 115 230VAC or low voltage SPDT relay 24 A C OPTION OUTDOOR CONDENSER For installations that require cooling to maintain an appropri ate pool room temperature an outdoor condenser unit can be connected to the PC unit in order to reject the unwanted heat outdoors or to another desired location
11. Verification Adjust de humidistat all the way down and verify PC unit starts Recommended Action Adjust de humidistat to desired setpoint Faulty wiring Verify 24VAC across C of the PC unit terminal strip and the terminal of the de humidistat that is connected to R of the PC unit terminals strip Correct wiring if voltage not pre sent De humidistat faulty Faulty wiring Pool Aquastat Stage 1 is not active Faulty wiring Pool Aquastat Stage 1 is faulty Faulty wiring Air Aquastat Stage 1 is not active Verify 24VAC across C of the PC unit terminal strip and the remaining de humidistat terminal Verify 24VAC across and Y of the PC unit terminal strip Verify S1 is indicated on Pool Aq uastat display Verify 24VAC across COM and Stage 1 C of Pool Aquastat Verify 24VAC across COM and Stage 1 NO of Pool Aquastat Verify 24VAC across and Y of the PC unit terminal strip Verify S1 is indicated on Air Aq uastat display Replace de humidistat if voltage not present Correct wiring if voltage not pre sent Adjust Pool Aquastat Stage 1 setpoint Correct wiring if voltage not pre sent Replace Pool Aquastat if voltage not present Correct wiring if voltage not pre sent Adjust Air Aquastat Stage 1 set point Pool Aquastat Stage 2 is active Faulty wiring Air Aquastat Stage 1 is faulty Verify if 52 is indicated on the Pool Aquastat dis
12. White Black Stripe Required Connections 24 White Black Stripe LOW Pres High pies Air Aquastat R Pool Aquastat A Wiring Y qd a O n Control Y FLOW Board pem Plenum F STATUS 22 gt Heater 1 High 70 Compressor 2 2 Low 7 Relay D 0 Air Cool C1 E A C 9 Aquastat Air Re heat Wiring O4 4 way valve PLENUM HEATER OPERATION Air Cool A C plenum heater is activated by 4 way valve Stage 2 S2 of the Air Aquastat The plenum heater F F dry contact makes the signal for the W2 terminal of the ECM fan 11 2 qp 770 Is 260065 Petitcodiac NB 11 25 MARITIME GEOTHERMAL m 7 Chris Geddes 28 FEB 11 D N 111 0 cs see ce rawing Name eis Geddes 28 FEB 1 PC 19 T DE Schematic Diagram Initial Release C GEDDES C GEDDES 20 11 Approved By MFG Size Drawing Number REV SHEET A d B ECO IMPL BY APVD BY DATE A 001423SCH 01 1 of 1 ISSUE 03 17 NOV 2014 Page 45 001427MAN 01 ELECTRICAL DIAGRAMS 230 7 60 continued PC Series Electrical Box Diagram 208 230 1 60 Scroll ECM Fan
13. Remove wires from compressor Resistance between any two termi nals is below the specified value Remove wires from compressor Check for infinite resistance be tween each terminal and ground Replace the compressor Replace the compressor If any terminal to ground is not infinite replace the compressor Seized compressor due to locked or damaged mechanism Start capacitor faulty Single phase only Compressor attempts to start but trips its internal overload after a few seconds Run capacitor already verified Check with capacitance meter Check for black residue around blowout hole on top of capacitor Attempt to rock compressor free If normal operation cannot be established replace compressor Replace if faulty Remove black residue in electrical box if any Potential Relay faulty Single phase only Compressor is tight due to damaged mechanism Replace with new one and verify compressor starts properly Compressor attempts to start but trips its internal overload after a few seconds Run capacitor has been verified already Page 30 Replace if faulty Attempt to rock compressor free If normal operation cannot be es tablished replace compressor ISSUE 03 17 NOV 2014 Will not switch to Air Reheat mode High Discharge Pressure Low Suction Pressure OPERATION TROUBLESHOOTING AIR REHEAT MODE Fault Possible Cause Verification Recomm
14. 750 65 2014 951 12 AIRFLOW SETTING LOW 1344 634 65 2128 1004 2688 1269 NOTES Unit sizes 45 and 55 nominal value up to 0 50 2 sizes 65 and 80 up 0 70 2 REDUCED airflow values do not apply to PC series units INFORMATION TAKEN FROM DOCUMENT 0005271NF 04 ISSUE 03 17 NOV 2014 APPENDIX C RANCO Aquastat Instructions The Ranco ETC is a microprocessor based electronic temperature control designed to handle the OFF ON functions of the PC unit The ETC is equipped with an LCD display which provides a constant readout of the sensed temperature and a touch keypad that allows the user to easily and accurately select the setpoint temperatures and differentials for the first and second stages of operation Programming Steps and Display Step 1 To start programming press the SET key once to access the Fahrenheit Celsius mode The display will show the current temperature scale F for degrees Fahrenheit or C for degrees Celsius Press either the UP arrow or DOWN arrow key to toggle between the F or C designation For closer regulation of your PC temperatures we recommend you program in the Fahrenheit mode STAGE 1 Step 2 Press the SET key again to access the Stage 1 setpoint The LCD will display the current setpoint and the 51 annunciator will be blinking on and off to indicate that the control is in the setpoint mode Press either the UP arrow key to increase
15. Low Voltage Wiring 24VAC 9 9 2 Refer to 000145CDG 02 for more detail WP 5 Field 885 T stat De humidistat Wiring 1217 Wiring Use and 18 2 conductor cable to connect the DOD 24 Heat Pump to the De humidistat Domno 88 R 24VAC Hot LP1LP2 Y FLOW HP1HP2 3 Y Compressor ECM Fan 11111111 ODO 9 i 2 0012 Air Aquastat Wiring e Dolo j 8 Use 18 2 conductor cable to connect the wom PETITS a S5 Heat Pump to the Air Aquastat C 24VAC Common Aq Adj R 24 Low 6 High 6 Use and 18 2 conductor cable to connect Med eee Stage 1 S1 NO to Pool Aquastat Stage 1 S1 NC and Stage 2 S2 NC S1 2 52 comp E Start RuN Pool Aquastat Wiring Capacitor MEN Use and 18 4 conductor cable to connect the Heat Pump to the Pool Aquastat 24VAC Common R 24VAC Hot Compressor ECM Fan Air Reheat 4 Valve Air Aquastat Wiring Use 18 3 conductor cable to connect 5 Field Heat Pump to the Air Cool thermostat Wiri C1 24VAC Common 1 24VAC Potential 208 O1 Air Conditioning 4 way valve Relay 230VAC a L2 Plenum Heater Wiring Use 18 2 conductor cable to connect Plenum F Use 18 2 conductor cable to conn
16. X x x X X x x LX _ x X X LX Xt X X Telir X X X X X Dehumidification occurs anytime the unit is operational Ensure the cooling setpoint is equal to or higher than the heating setpoint to avoid these conditions Ccooling has priority should these conditions occur but the plenum heater will still activate anytime Air Aquastat Stage 2 is on ISSUE 03 17 NOV 2014 Page 11 001427MAN 01 DIAGRAM PC Control System Flow Chart Priority Jumper Not Placed without A C De Pool Pool Air Air humidistat Aquastat Aquastat Aquastat Aquastat STAGE 1 STAGE 2 STAGE 1 STAGE 2 Electric Air Re heat PC Unit OFF Mode Pool Water Heat Mode Pool Pool Air Air Aquastat Aquastat Aquastat Aquastat STAGE 1 STAGE 2 STAGE 1 STAGE 2 Electric Plenum Heat Air Cool Aquastat STAGE 182 PC Unit OFF Pool Water Heat Mode 001427MAN 01 Page 12 ISSUE 03 17 NOV 2014 The unit is equipped with direct drive ECM fan motor for maximum efficiency The motor features a soft start which fur ther improves efficiency by eliminating inrush current and pro vides a smooth quiet ramp up to speed The motor will main tain the programmed air flow up to the maximum external static val
17. 208 3 60 VAC 6 220 1 50 VAC 7 380 3 50 VAC de l MODEL NOMENCLATURE PC 65 PG 1S TI KDERS xx Compressor Stages 5 1 Stage 001427MAN 01 Page 2 Revision 01 02 etc Fan Discharge S Side T Top up D Down Fan Return R Right Side Fan Motor E ECM Variable Speed Fan Type D Direct Drive Air Coil K Coated Indoor Loop Pool Exchanger T Titanium ISSUE 03 17 NOV 2014 APPLICATION TABLE REFRIGERANT REFRIGERANT VOLTAGE STAGES INDOOR FAN CASE REVISIONS GAUGES COIL O Q O 1 _ 5 8 ps 8 6 5 This manual applies only to models and revisions listed this table ISSUE 03 17 NOV 2014 Page 3 001427MAN 01 Table of Contents TABLES DIAGRAMS amp DRAWINGS 2 2 2 PAGE 5 INSTALLATION INFORMATION isi MU XE US 6 COS DIES E EDEN 6 Unpacking the c 6 eee eee E cia ee ee et ee Page 6 zeigte fT 6 Control BequiremebllS
18. PC SERIES REFIGRATION CIRCUIT AIR RE HEATING MODE lt Air gt Evaporator 4 n External Air gt Liquid Line 2 Vapour Line gt lt POOL WATER gt Filter Sight TXV Drier Glass Water Condenser RV 2 4 way vavle Receiver Scavenger POOL WATER OUT Ne Scavenger RV 1 Line a ay Low Pressure vavi i Cut out Service Service m port Port High Pressure Cut out ACTIVATION TABLE ENERGIZED Compressor Accumulator i MARITIME GEOTHERMAL m m IMPL BY APVD BY 001427MAN 01 Drawing PC Series Refrigeration Circuit Diagram Air Re Heating Mode Size Drawing Number REV SHEET 000353RCD ISSUE 03 17 NOV 2014 Approved By Chris_Geddes Approved By Approved By Page 40 09 JAN 07 DATE REFRIGERATION CIRCUIT DIAGRAMS continued PC SERIES REFIGRATION CIRCUIT AIR COOLING MODE Air Condenser Air Evaporator lt External Condenser Liquid Line 3 Vapour Line Row POOL WATER IN Sight TXV Glass Filter Drier Water Condenser POOL WATER OUT RV 1 4 way Ng Low Pressure Cut out Service Pressure Cut out Nu ACTIVATION TABLE ITEM ENERGIZED RV 1 YES RV 2 YES
19. POWER SUPPLY TROUBLESHOOTING Possible Cause No power to the heat pump Disconnect switch open if installed Fuse blown Breaker Tripped Transformer breaker tripped No display on aquastats Faulty transformer Faulty wiring between heat pump and aquastat Faulty aquastat ISSUE 03 17 NOV 2014 Verification Verify disconnect switch is in the ON position At heat pump disconnect box voltmeter shows 230VAC on the line side but not on the load side Breaker on transformer is sticking out Transformer breaker is not tripped 230VAC is present across L1 and L3 of the compressor contactor but 24VAC is not present across C of the terminal strip 24 is not present across 24V and COM of the aquastat 24VAC is present across 24V and COM of the aquastat but no display Page 27 Recommended Action Determine why the disconnect switch was opened if all is OK close the switch Reset breaker or replace fuse with proper size and type Time delay type D Push breaker back in If it trips again locate cause of short circuit and correct Replace transformer Correct the wiring see 000145CDG Replace aquastat 001427MAN 01 Y signal to PC unit starts compres sor No O signal to PC unit activates Air Re Heat mode A C Mode does not activate 001427MAN 01 CONTROLS TROUBLESHOOTING Possible Cause De humidistat not active
20. hr 55 8 23 10 4 30 13 6 14 6 4 1 500 708 800 74 19 8 6 1 100 93 24 10 9 28 12 7 Residential application with Tp 80 F and Ta 82 F EWT 80F and EAT 82F TABLE 8 Step by Step Pool Evaporation Rate Calculation Dc Select Non Active Humidity Level 50 60 Select the number of active hours Select pool water temperature Select pool room air temperature F hours Calculate the number of non active hours 24 Ha Lookup the active Evaporation Rate Factor from TABLE 12 80 82 50 2 22 hours Tp Ta Select Pool Surface Area ERFa 0 036 Lbs hr ft Lookup the non active Evaporation Rate Factor from TABLE 11 or TABLE 12 from Step 3 ERFna 0 048 Lbs hr ft Select the activity factor see TABLE 13 Calculate the Average Evaporation Rate Factor ERFa AF Hna x 0 5 24 ERFavg 0 0235 Lbs hr ft Step 1 2 EN 4 6 7 EN EN 10 Calculate Pool Evaporation Rate Ap ERFavg O LI 800 18 8 Lbs hr is recommended that the air temperature 2 F above the pool water temperature The lower the air temperature in comparison to the water temperature the higher the evaporation rate Typical residential values are Tp 80 F 27 C and Ta 82 F 28 C 001427MAN 01 Page 16 ISSUE 03 17 NOV 2014 TABLE 10 Typical PC Unit Sizing Guide 50Hz Moisture Moistu
21. 100 93 3 5 241 2 400 1133 103 300 30 3 28 127 33 15 0 1 300 111 EWT Tp 80 F 26 7 C and EAT Ta 82 F 27 8 C TABLE 19 PC Unit Capacity Ratings 50Hz Moisture Moisture Typical tc Pool Airflow Removal Removal Pool Surface ow Pressure Drop 50968 60 kPa FM Us Watts Leskon tema 45 17 5 21 1 32 1 5 10 3 1 200 566 1 690 37 700 11 0 13 5 9 15 6 8 500 46 2 2 15 2 1 500 708 54 100 15 8 16 7 3 20 9 1 700 65 65 29 1 35 221 2 8 19 3 1 900 897 3 450 64 000 18 8 21 9 5 26 11 8 900 84 3 5 24 1 2 400 1133 88 000 25 8 24 10 9 29 13 2 1 100 102 EWT Tp 80 F 26 7 C and EAT Ta 82 F 27 8 001427MAN 01 Page 42 ISSUE 03 17 NOV 2014 ELECTRICAL TABLES ISSUE 03 17 NOV 2014 Page 43 001427MAN 01 ELECTRICAL DIAGRAMS Controls Connections PC Series Controls Connection Diagram CONTROLS CONNECTIONS TO Location HP Electrical Box 22 3 Term Wire De humidistat HP Electrical Box HP Electrical Box Wire De humidistat Air Aquastat HP Electrical Box 51 Air Aquastat 51 Air Aquastat HP Electrical Box Air Aquastat COM Pool Aquastat HP Electrical Box C S1 Pool Aquastat S1 Pool Aquastat O 1S1 Pool Aquastat S1 Pool Aquas
22. 15 D ct 611 qc 22 Table 16 Refrigerant Charge 2 2 42 Table 17 Shipping exe 42 Table 18 PC Unit Capacity Ratings 60Hz 42 Table 19 PC Unit Capacity Ratings 50 2 42 Table 20 PC Unit Electrical Information 230 1 60 Page 43 Table 21 PC Unit Electrical Information 208 3 60 0 0 111 Page 43 Table 22 PC Unit Electrical Information 220 1 50 010040 4 1111 Page 43 Table 23 PC Unit Electrical Information 380 3 50 1221222 Page 43 DIAGRAMS Diagram A PC Control System Flow Chart Priority Jumper Placed without A C Page 9 Diagram B PC Control System Flow Chart Priority Jumper Placed with Page 9 Diagram C PC Control System Flow Chart Priority Jumper Not Placed without A C Page 12 Diagram D PC Control System Flow Chart Priority Jumper Not Placed with
23. Air Aquastat Wiring Use and 18 2 conductor cable to connect the e status Heat Pump to the Air Aquastat 244 Common Adj R 24VAC Hot Low 6 6 Use and 18 2 conductor cable to connect Med Nom 157 Stage 1 S1 NO to Pool Aquastat Stage 1 S1 NC and Stage 2 S2 NC Field T stat Wiring 24VAC jeisipiunu e yeysenby Eu d 4 f 5g 23 2 5 D et e 2 o BI i m m 2 5 22 gt Ii L Pool Aquastat Wiring Use and 18 4 conductor cable to connect the Heat Pump to the Pool Aquastat 24VAC Common R 24VAC Y Compressor ECM Fan O Air Reheat 4 way Valve Air Cool A C Aquastat Wiring Use an 18 3 conductor cable to connect the Field Heat Pump to the Air Cool thermostat 1 24 Common Wiring R4 2 Hot Potential 208 Air Conditioning 4 way valve Relay Label 230VAC 220 24VAC 100VA Transformer e 24VAC GND 750 TDF Plenum Heater Wiring L2 Use an 18 2 conductor cable to connect Heat Pump F to Plenum Heater F F Use an 18 2 conductor cable to connect Air Aquastat Stage 2 52 N
24. Voltage across L1 and L2 L1 and L3 L2 and L3 Flow set for a discharge pressure of 350 400PSIG Suction pressure after 10 minutes of runtime Unit switches to Air Reheat mode Suction Pressure Discharge Pressure Duct Return Duct Supply and Delta T Compressor L1 black wire current Current draw all stages on Unit switches back to pool water heat mode Suction and discharge after 10 minutes of runtime Electrical box cover installed on unit and plenum heater Piping leak free area is clean De humidistat setpoint Pool Aquastat Settings 51 DIF1 52 DIF2 ings S1 DIF1 S2 DIF2 amp gt C D 2 0 m 6 o 2 gt 2 0 m CD 5 51 DIF1 52 DIF2 ensure identical Installer Signature A total of three copies are required one for the homeowner one for the installer and on to be sent to Maritime Geothermal Ltd ISSUE 03 17 NOV 2014 Page 25 001427MAN 01 General Maintenance GENERAL MAINTENANCE SCHEDULE Air Filter 6 months Inspect for dirt Replace if necessary Inspect for pitted or burned points Replace if necessary Inspect for clogs Remove and clean if necessary Clean as per HEAT EXHCANGER FLUSING PROCEDURE below Whenever system performance is reduced HEAT EXCHANGER FLUSHING PROCEDURE INDOOR POOL LOOP Isolate the heat exchanger by closing the 3 way valves in
25. all bends in supply and to the left or right return ducts Flexible D exible Duct Collar Pool Room Air filter Return Air Flexible Duct Collar minimum 7 12 away from plenum heater DEM elements if installed Optional Electric Pool Plenum Heater Room Supply Air Out Vent as per local codes D Turning Radii Pool Room Route to pool to Supply Air Copper PVC Vinyl Tubing etc Minimize make up water if code Condensate Drain allows to a drain 2 thick styrofoam 7 8 copper otherwise required if unit is not suspended Minimum decline of 1 8 per foot for condensate 18 4 5 gt 12 Accoustic insulation may be used inside the supply ducts near the unit to dampen any air noise that may be present Ensure there is no insulation within 12 of the plenum heater if installed Chris Geddes 01 JUN 09 Petitcodiac NB JUN 09 EAZ ris 7 Name Duct and Condensate Chris Geddes 01 JUN 09 _ Connections PC unit 01 initial Release c GEppES c 01 JUN 09 Size Drawing Number REV SHEET REV ECO IMPL BY APVD BY DATE 001032CDG 01 1 of 1 001427MAN 01 Page 20 ISSUE 03 17 NOV 2014 DIAGRAM Floor Supply Ducts With Elevated Return
26. does not show 24VAC across transformer secondary wind ing Transformer tested OK in previous step 24VAC not present across C and ground at the plenum heater but not across ground of the plenum heater and Air Aquastat Stage 1 NO Correct wiring Replace transformer Replace control board Correct wiring Air Cool Aquastat Stage 2 Air Cool Aquastat Stage 2 is active 24VAC present across plenum heat er ground and Stage 2 C but across plenum heater ground and Stage 2 NO Replace Air Aquastat Faulty wiring Thermal overload is tripped Fan not operating Air Cool Aquastat Stage 2 is active 24VAC present across plenum heat er ground and Stage 2 NO but across plenum heater ground l See Fan Not Operating section Correct wiring Correct problem Reset thermal overload Faulty overload Reset thermal overload Replace if faulty Dole flow control Valve The Dole flow control is a simple self cleaning device designed to deliver a constant volume of water from any outlet whether the pressure is 15 psig or as high as 125 psi The controlling mechanism consists of a flexible orifice that varies its area inversely with pressure so that a constant flow is maintained Multimeter Voltmeter Digital In line Flowmeter ISSUE 03 17 NOV 2014 Page 37 001427MAN 01 REPAIR PROCEDURES PUMP DOWN PROCEDURE Connect the refrigera
27. from the PC unit as it could overload the transformer An exter nal power supply is required EXHAUST FAN OPTION As an alternate for installations that may only require minor cooling an exhaust fan could be installed as part of the system to eliminate excess heat from the pool room This exhaust fan would be temperature controlled ie aquastat and would operat er whenever the pool room temperature rose above the activa tion value of the controller NOTE The Priority Jumper must be placed for this setup ISSUE 03 17 NOV 2014 Air Conditioning with PC unit using 2 3 way motorized valves and a local source of cold water Plenum Heater Air Cool Aquastat PC Unit Eua T Aquastat To 24VAC supply Probe NOT from PC unit 5 NC NO C NC C NO T NC Port Stage 1 Stage 2 O NOTE Depending waste 4 E NC Port From the valve mechanism 1 water you may have to use a NO third wire and the NC supply terminal to power the Port valve closed Install a three way motorized valve in each of the water lines running to the PC unit and operate from a Ranco ETC digital Thermostat Set the Ranco controller to cooling control and set Stage one to 2 F above the Pool room temperature setting Set the differential to 1 F To Pool Theory of Operation When the room gets too
28. is too much flow through the unit U is low adjust T until the pressure at U is within range 1001 1021 GEDDES GEDDES 001427MAN 01 20 OCT 11 25 MAY 09 15 FEB 06 DATE Approved By Drawing Name GEOTHERMAL 170 PC Series If there is not enough flow U is hiah adiust O until the pressure at U is within range Chris Geddes 15 FEB 06 Checked B Date Chris Geddes 15 FEB 06 Chris Geddes 15 FEB 06 MFG Date 170 Plantation Rd Petitcodiac NB EAZ 6H4 Controls Connection Diagram for ECM Fan Size Drawing Number REV SHEET 000145CDG 1 of 1 Page 44 ISSUE 03 17 NOV 2014 ELECTRICAL DIAGRAMS 230 1 60 PC Series Schematic Diagram 208 230 1 60 Scroll ECM Fan L1 L2 Gnd 230 Compressor R T Run Cap Start Cap N Compressor Contactor Potential Relay Air Flow Select Low 6 White Black Stripe 5 Med Nom Default 15 High 6 12 2 4 12 7 LL NOTE For 208VAC move the red wire E connected to the 240 terminal of the gl transformer to the 208 terminal 2 gt NOTE case of short or overload 75VA Control x e rectify the problem and press black Transformer T button on transformer to reset breaker
29. not occur while there Faulty compressor contactor Adjusting the TXV does not affect the superheat or the suction pres sure Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan trip ping the low pressure control Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Replace contactor Intermittent fan See Fan Troubleshooting section Correct the problem Random Faulty compressor HighPressure trip contactor does not occur while there Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan trip ping the low pressure control Replace contactor Intermittent fan See Fan Troubleshooting section Correct the problem ISSUE 03 17 NOV 2014 Page 35 001427MAN 01 FAN TROUBLESHOOTING Possible Cause Verification Recommended Action Dirty air filter Low Airflow Fan operating on wrong Stage speed Fan not operat ing or operating intermittently 001427MAN 01 Inspect Replace Dirty air coil Poor Ductwork Air flow selected on Tap Board is too low Fan Control Signal Har ness is loose Inspect Measure delta T between supply and return ducts at the unit it in heating mode it should not be above 30F 17C Check selection on Air Flow Tap Board Verify that the connector is properly inserted i
30. or the DOWN arrow key to decrease the setpoint to the desired temperature Step 3 Press the SET key again to access the Stage 1 differential The LCD will display the current differential and the Dif 1 annunciator will be blinking on and off to indicate that the control is in the differential mode Press either the UP arrow key to increase or the DOWN arrow key to decrease the differential to the desired setting Step4 Press the SET key again to access the Stage 1 cooling or heating mode The LCD will display the current mode either C1 for cooling or H1 for heating Press the UP or DOWN key to toggle between the C1 or H1 designation STAGE 2 Step 5 Press the SET key again to access the Stage 2 setpoint The LCD will display the current setpoint and the S2 annunciator will be blinking on and off to indicate that the control is in the setpoint mode Press either the UP arrow key to increase or the DOWN arrow key to decrease the setpoint to the desired temperature Step 6 Press the SET key again to access the Stage 2 differential The LCD will display the current differential and the Dif 2 annunciator will be blinking on and off to indicate that the control is in the differential mode Press either the UP arrow key to increase or the DOWN arrow key to decrease the differential to the desired setting Step 7 Press the SET key again to access the Stage 2 cooling or heating mode The LCD will display the current mode either C2 fo
31. the IN and OUT ports to the heat exchanger This will block off the flow from the pool and provide connection points to flush through STEP 2 Blow out the heat exchanger into a clean 5 gallon bucket using compressed air purge cart is not available use a 5 gallon plastic bucket a circulator and some plastic piping to create a makeshift pump system Connect a the inlet and outlet to the heat exchanger ports STEP 4 Place 2 gallons of RYDLYME in the purge cart or bucket Circulate the fluid through the heat exchanger for at least 2 hours 3 recommended Disconnect the purge system dispose of the solution RYDLYME is non toxic and biodegradable and as such can be poured down a drain Connect fresh water and a drain to the heat exchanger ports and flush the exchanger for several minutes Return the plumbing to its original configuration and open the IN and OUT valves Operate the system and check for improved performance Depending on the plumbing there should be either unions or boiler drains for to access the heat exchanger 001427MAN 01 Page 26 ISSUE 03 17 NOV 2014 Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump If the problem is with the domestic hot water or the plenum heater proceed to those sections at the end of the troubleshooting guide Repair procedures and reference refrigeration circuit diagrams can be found at the end of the troubleshooting guide STEP 1 Ve
32. the air temperature is in comparison to the water temperature the higher the evaporation rate The evaporation rate of the pool increases when the fol lowing occur Pool water temperature increases Activity level wet floor area increases Airflow across pool surface increases Room air temperature decreases Room relative humidity level decreases 1 Pool water temperature The temperature of the pool water in relation to the air temperature is one of the most deciding factors in determining overall evaporation rate from the pool As the room air temperature decreases in relation to the pool water the evaporation rate will increase dramatically The normal pool temperature range for private pool use is from 78 F to 82 F The air temperature should be preferably kept 1 to 2 F above the water temperature for the most economical operation of the pool conditioner 2 Activity level wet floor area During pool use water will be drawn out of the pool by the action of swimmers leaving and re entering the pool during normal activities This water will accumulate on the floor surrounding the pool and will contribute to the overall surface exposed to the air for evaporation purposes If the pool floor is heated then the evaporation rate will exceed that of the pool itself and this extra wetted area should be considered in sizing the pool conditioner 3 Airflow across pool surface Increased airflow across the surface area
33. trip ping the low pressure control Page 33 Locate the leak and repair it opray nine a sniffer and dye are common methods of locating a leak Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Replace contactor See Fan Troubleshooting section Correct the problem 001427MAN 01 OPERATION TROUBLESHOOTING AIR COOLING MODE A C Possible Cause Will not switch to Verification Recommended Action Problem with controls See Controls Troubleshooting sec Air Cooling mode tion Faulty reversing valve so lenoid coil RV 2 Verify solenoid by removing it from the shaft while the unit is running There should be a loud whoosh sound when it is removed Replace solenoid if faulty Faulty reversing valve Pool Water Heat mode instead of Air Cooling mode Problem with controls A click can be heard when the is energized but the unit continues to heat instead of cool See Controls Troubleshooting sec tion Replace reversing valve Faulty reversing valve so lenoid coil RV 1 Faulty reversing valve Low or no Outdoor con denser unit airflow High Discharge pressure Entering air temperature too hot Dirty or fouled outdoor air coil Verify solenoid by removing it from the shaft while the unit is running There should be a loud whoosh sound when it is removed A click can be heard when the
34. when the Air Aquastat and Pool Aquastat are satisfied Without an outdoor condenser unit the heat will be rejected to the pool even though the Pool Aqastat is satisfied causing the pool to overheat The outdoor condenser unit does not require a TXV nor should it have one Only an air coil and fan are required The condenser unit should be sized to match or exceed the rejection capacity of the unit to ensure proper operation refer to TABLE 16 The PC unit has external liquid and vapour ports on it for connection to an outdoor condenser unit The vapour line is 7 8 OD and the liquid line is 3 8 OD The PC unit must be pumped down to remove all refrigerant and then charged with nitrogen until a positive pressure is reached before the ends of the ports can be cut off and connected to Connect the lines and silver solder the connections Maritime Geothermal Ltd absolutely requires that dry nitrogen be bled through the system during all silver soldering procedures so that no oxidation occurs on the inside of the copper tubing The service ports on the unit can be used to connect the nitrogen with a refrigeration manifold If necessary a wet rag can be wrapped around the each of the ports to prevent melting the grommet when silver soldering Ensure that no water enters any of the ports or tubing The Outdoor condenser unit will also require power and con trol connections Refer the unit s manual for a description of these Only one
35. wire size and breaker size needed to provide power to the plenum heater 18 ISSUE 03 17 NOV 2014 TABLE 14 Plenum Heater Sizing Size Current Breaker kW A A 15 62 100 62 20 84 15 EN CONDENSATE DRAIN The unit comes equipped with a 7 8 OD copper pipe port labeled Condensate Drain This drain allows the condensate which forms during the air conditioning cycle to be removed from the unit The drain should be connected as per local codes During high humidity weather there could be as much as 25 gallons of water formed per day NOTE The condensate drain operates by gravity ensure the unit is mounted high enough to allow the condensate to flow without overflowing the internal drip tray located at the bottom of the unit Care should be taken in the spring to ensure that this pipe is not plugged with dust that has collected during the winter caus ing the condensate to overflow into the bottom of the unit and onto the floor The condensate drain must be externally trapped is recommended that it be piped into the pool via separate line in order to reduce the amount of make up water required for the pool Drawing 001032CDG shows a typical installation ISSUE 03 17 NOV 2014 Page 19 001427MAN 01 Typical Duct and Condensate Connections PC Unit Ducts should be sized as per the Duct Sizing table in this manual is Filter Rack Use turning Radii for Can be mounted
36. 3 17 NOV 2014 Page 5 001427MAN 01 Installation Information UNIT DESCRIPTION The PC Series unit is a high efficiency heat recovery unit with coated air coils titanium exchanger and stainless steel case The unit cools and dehumidifies the pool area and can reject the heat back into the airstream into the pool or to an optional external outdoor condenser unit An electrically commutated ECM fan with several speed options is standard The motor has a soft start function for im proved efficiency and reduced wear The unit contains R410a refrigerant which is an environ mentally friendly refrigerant R410a is also a more efficient re frigerant than R22 or R407c The unit has several key features that are described in the specifications document for the particular heat pump Please request a copy if desired or visit www nordicghp com UNPACKING THE UNIT When the heat pump reaches its destination it should be unpacked to determine if any damage has occurred during shipment Any visible damage should be noted on the carrier s freight bill and a suitable claim filed at once The heat pump is well constructed and every effort has been made to ensure that it will arrive intact however it is in the customer s best interest to examine the unit thoroughly when it arrives OPTIMUM PLACEMENT The placement of a the unit has negligible effects on the operation of the system The unit can be placed wherever it can most easily be con
37. 8 26x34 28x32 9800 908 34 24 42 25x40 26x38 28x34 908 34 25x40 26x38 28x34 2x4 30x36 32x34 33x33 Doo boo Pb 3 32x38 34x36 35x35 30x45 34 40 36x38 37 37 001427MAN 01 Page 22 oo X gt lt N Return Air Airflow Diameter A ISSUE 03 17 NOV 2014 Startup Procedure The following steps describe how to perform the startup procedure of the pool conditioner The PC Series R410a Startup Record located in this manual is used in conjunction with this startup procedure to provide a de tailed record of the installation A completed copy should be left on site a copy kept on file by the installer and a copy should be sent to Maritime Geothermal Ltd Check the boxes or fill in the data as each step is completed For data boxes circle the appropriate units Fill in the top section of all three copies or one copy if photocopies can be made after the startup has been completed PRE START INSPECTION Ductwork 1 Verify that all ductwork has been completed and is firmly attached to the unit Verify that any dampers or diverters are properly set for operation of the unit Verify that all registers are open and clear of any objects that would restrict the airflow Verify that a new air filter is installed and the cover is secured Verify the condensate drain is connected properly tra
38. 86 88 94 96 98 00 102 104 0 020 0 022 0 026 0 028 0 030 0 032 0 034 0 036 0 038 0 040 0 042 0 026 0 030 0 032 0 034 0 036 0 038 0 040 0 044 0 046 0 048 0 050 L9 0 034 0 036 0 038 0 042 0 044 0 046 0 048 0 050 0 052 0 054 0 056 0 040 0 044 0 046 0 048 0 050 0 054 0 056 0 058 0 060 0 062 0 064 0 0 0 0 IN NO 85 0088 007 74 0 078 0 0 O e e co NO 22104 0 14 Recommended setpoints value O i O 082 0 084 0 088 0 090 0 NO O O I O O CO NO CO O O OIO 0 048 0 052 0 054 0 056 0 060 0 060 0 064 0 066 0 068 0 070 0 072 0 058 0 060 0 062 0 064 0 066 0 070 0 072 0 074 0 076 0 078 0 080 CO O Co CO O NIN 77 0 084 0 086 0 08 2 0 094 0 096 1918 M 004 A w NO NIO AIIN NO I O NO lI
39. Board and C Verify if there is 24 across LP1 on the Control Board and C of the terminal strip as well as LP2 and C 24VAC is present across 1 and C and LP2 and C but no voltage is present across CC on the Control Board and C Check static refrigeration pressure of the unit for a very low value Verify jumper is in place between pins marked FLOW SWITCH Replace high pressure control if voltage is present on HP1 but not on 2 Replace Control Board Replace high pressure control if voltage is present on LP1 but not on LP1 Replace Control Board Locate the leak and repair it Spray nine a sniffer and dye are common methods of locating a leak Place a jumper if missing Flow switch faulty Only if installed Faulty Control Board Verify 24VAC is present between each flow switch pin on the Control Board and the C terminal of the ter minal strip while there is flow through the unit 24VAC is present across each FLOW SWITCH terminal and C but not voltage is present across CC on the control board and C Replace flow switch if signal is not present at both terminals on the Control Board Replace Control Board ISSUE 03 17 NOV 2014 Page 29 001427MAN 01 Compressor will not start Compressor starts hard 001427MAN 01 COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Faulty Control Board Faulty run capacitor
40. Check valve is cold to the touch and does not warm up Adjust TXV to obtain 8 12 F 3 6 C superheat Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Replace check valve Replace check valve Leaking reversing valve RV 1 or RV 2 Faulty compressor not pumping Common suction line is warm com pressor 18 running hot Pressures change only slightly from static values when compressor is started Replace reversing valve Replace compressor Compressor See Low Suction frosting up Pressure in this section TXV stuck almost closed or partially blocked by for eign object TXV frosting up Random low pressure trip does not occur while on site Faulty compressor contac tor Intermittent fan Adjusting the TXV does not affect the superheat or the suction pres sure Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan trip ping the high pressure control See Fan Troubleshooting section Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Replace contactor Correct the problem OPERATION TROUBLESHOOTING POOL WATER HEAT MODE Faut Possible Cause Verification Recommended Action Low or no Indoor pool flow High Discharge pressure Dirty or fouled coaxial heat exchanger Unit is overcharged Only possible if
41. MARITIME GEOTHERMAL Installation and Service Manual PC Series Scroll R410a Model Sizes 45 80 Heat Recovery Pool Conditioners Maritime Geothermal Ltd Email info nordicghp com P O Box 2555 Web www nordicghp com Petitcodiac N B E4Z6H4 Document Number 001427MAN 01 Ph 506 756 8135 ISSUE 03 DATE 17 NOV 2014 N SAFETY PRECAUTIONS N WARNING Ensure all access panels are in place and properly secured before applying power to the unit Failure to do so may cause risk of electrical shock WARNING Before performing service or maintenance on the heat pump system ensure all power sources are DISCONNECTED Electrical shock can cause serious personal injury or death WARNING Heat pump systems contain refrigerant under high pressure and as such can be hazardous to work on Only qualified service personnel should install repair or service the heat pump CAUTION Safety glasses and work gloves should be worn at all times whenever a heat pump is serviced A fire extinguisher and proper ventilation should be present whenever brazing is performed CAUTION Venting refrigerant to atmosphere is illegal A proper refrigerant recovery system must be employed whenever repairs require removal of refrigerant from the heat pump PC Pool Conditioner Nominal Size 45 Ton 55 4 65 5 80 6 Refrigerant 410 Refrigeration Gauges Yes Voltage Code 1 230 1 60 VAC 2
42. O and to Plenum Heater C 1 1 220VAC CONNECTIONS Wire Colour Contactor Label Line 2 Heat Pump Electrical Service Requirements 220VAC Single Phase 50Hz 220 1 50 Line 1 Black L1 Model Min Circuit Min Wire Fuse or Connect Gnd to Gnd Lug Size Ampacity Gauge Breaker is L1 Gnd Gnd Lug 1 GEOTHERM AL _ 1 1 UL Approved By TENG Daie Drawing Name o y O chis caddos y 6 Electrical Box Diagram Initial Release C GEDDES GEDDES 20 11 Size Drawing Number REV SHEET ECO IMPL BY APVD BY DATE A 001426ELB 01 of 1 001427MAN 01 Page 48 ISSUE 03 17 NOV 2014 ELEC SERVICE 414 ISSUE 03 17 NOV 2014 CASE DETAILS FILTER RACK AIR FILTER POOL WATER IN 17 2 PVC 12172 COND DRAN 21 NOT INTERNALLY TRAPPED 144 4 1 Front View Top View Page 49 001427MAN 01 CASE DETAILS continued PC PG S T KDERS DOWNFLOW OPTION 12 3 4 PC PG 5 T KDERD Bottom View 001427MAN 01 Page 50 ISSUE 03 17 NOV 2014 APPENDIX Control Board Specifications Anti short cycle lockout control Pressure flow switch monitoring Alarm output during lockout 5 minute anti short cycle delay 5 seco
43. Single phase only Loose or faulty wiring Measuring from C on the terminal strip verify there is voltage at Y HP1 HP2 LP1 LP2 and both flow pins but no voltage present at CC Check value with capacitance meter Should match label on capacitor Compressor will hum while trying to start and then trip its overload Check all compressor wiring includ ing inside compressor electrical box If no voltage at Y then see Con trols Troubleshooting otherwise replace Control Board Replace if faulty Fix any loose connections Re place any damaged wires Faulty compressor contactor Voltage on line side with contactor held closed but no voltage on one or both terminals on the load side Points pitted or burned Or 24VAC across coil but contactor will not engage Replace contactor Thermal overload on compressor tripped Ohmmeter shows reading when placed across R and S terminals and infinity between C amp R or C amp S A valid resistance reading is present again after the compressor has cooled down Proceed to Operation Trouble shooting to determine the cause of the thermal overload trip Burned out motor open winding Burned out motor shorted windings Motor shorted to ground Remove wires from compressor Ohmmeter shows infinite resistance between any two terminals Note Be sure compressor overload has had a chance to reset If compressor is hot this may take several hours
44. TH HEREIN THERE IS NO EXPRESS WARRANTY AS TO ANY OF MG S PRODUCTS MG MAKES NO WARRANTY AGAINST LATENT DEFECTS MG MAKES NO WARRANTY OF MERCHANTABILITY OF THE GOODS OR OF THE FITNESS OF THE GOODS FOR ANY PARTICULAR PURPOSE LIMITED EXPRESS RESIDENTIAL WARRANTY PARTS MG warrants its Residential Class products purchased and retained in the United States of America and Canada to be free from defects in material and workmanship under normal use and maintenance as follows 1 Air conditioning heating and or heat pump units built or sold by MG MG Units for five 5 years from the Warranty Inception Date as defined below 2 Thermostats auxiliary electric heaters and geothermal pumping modules built or sold by MG when installed with MG Units for five 5 years from the Warranty Inception Date as defined below 3 Sealed refrigerant circuit components of MG Units which components only include the compressor refrigerant to air water heat exchangers reversing valve body and refrigerant metering device for ten 5 years from the Warranty Inception Date as defined below 4 Other accessories and parts built or sold by MG when installed and purchased with MG Units for five 5 years from the date of shipment from MG 5 Other accessories when purchased separately for 1 year from the date of shipment from MG The Warranty Inception Date shall be the date of original unit installation as per the date on the installation S
45. THE MG UNITS REGISTERED WITH MG THAT BEARS THE MODEL AND SERIAL NUMBERS STATED ON THE INSTALLATION START UP RECORD AND MG SHALL NOT IN ANY EVENT BE LIABLE UNDER THE TERMS OF THIS LIMITED WARRANTY UNLESS THIS INSTALLATION START UP RECORD HAS BEEN ENDORSED BY OWNER amp DEALER INSTALLER AND RECIEVED BY MG LIMITED WITHIN 90 DAYS OF START UP Limitation This Limited Express Residential Warranty is given in lieu of all other warranties If not withstanding the disclaimers contained herein it is determined that other warranties exist any such express warranty including without imitation any express warranties or any implied warranties of fitness for particular purpose and merchantability shall be limited to the duration of the Limited Express Residential Warranty LIMITATION OF REMEDIES In the event of a breach of the Limited Express Residential Warranty MG will only be obligated at MG s option to repair the failed part or unit or to furnish a new or rebuilt part or unit in exchange for the part or unit which has failed If after written notice to MG s factory in Petitcodiac New Brunswick of each defect mal function or other failure and a reasonable number of attempts by MG to correct the defect malfunction or other failure and the remedy fails of its essential purpose MG shall refund the purchase price paid to MG in exchange for the return of the sold good s Said refund shall be the maximum liability of MG THIS REMEDY IS THE SOLE AND EXCLUSI
46. VE REMEDY OF THE BUYER OR PURCHASER AGAINST MG FOR BREACH OF CONTRACT FOR THE BREACH OF ANY WARRANTY OR FOR MG S NEGLIGENCE ORIN STRICT LIABILITY LIMITATION OF LIABILITY MG shall have no liability for any damages if MG s performance is delayed for any reason or is prevented to any extent by any event such as but not limited to any war civil unrest government restrictions or restraints strikes or work stoppages fire flood accident shortages of transportation fuel material or labour acts of God or any other reason beyond the sole control of MG MG EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE IN CONTRACT FOR BREACH OF ANY EXPRESS OR IMPLIED WARRANTY OR IN TORT WHETHER FOR MG s NEGLIGENCE OR AS STRICT LIABILITY OBTAINING WARRANTY PERFORMANCE Normally the dealer or service organization who installed the products will provide warranty performance for the owner Should the installer be unavailable contact any MG recognized distributor dealer or service organization If assistance is required in obtaining warranty performance write or call Maritime Geothermal Ltd Customer Service PO Box 2555 Petitcodiac New Brunswick E4Z 6H4 506 756 8135 e mail to info nordicghp com NOTE Some states Canadian provinces do not allow limitations on how long an implied warranty lasts or the limitation or exclusions of consequential or incidental damages so the foregoing exclusions and limit
47. at mode Stage 1 of the Air Aquastat will switch the unit to air re heat mode Stage 2 of the Air Aquastat will engage the plenum heater Stage 1 of the Pool Aquastat will start the unit if not running mode re mains air re heat Stage 2 of the Pool Aquastat will override air reheat mode and select pool heat mode Optional AC will override both pool and air re heat modes to engage air conditioning mode it for terminal descriptions Electrical Box ER De humidistat F C SPST De humidistat Connections Aquastat Plenum Heat i 1 i 5 Connections Connections zw bad CRYO 25127251 182 cable 8 3 184 cable White p Air Aquastat Pool Aquastat Air Cool A C Aquastat Ranco 24 24 24 p _ 18 4 cable 51 52 51 52 51 52 STAGE 1 STAGE 2 STAGE 1 STAGE 2 STAGE 1 STAGE 2 NC C NO NC NOC NC C NO NC NO C NC C NO qo PO C qp 4 gt White White 18 2 cable Install only if using air cooling A C option It has three modes in which it The unit Mode Priority Priority Jumper placed typical The d
48. ation Recommended Action A C Mode does Verify 24 across COM and not activate Stage 2 C of the Air Cool Aquastat Verify 24VAC across COM and Stage 2 NO Verify 24VAC acrosst and O of PC unit terminal strip Air Aquastat Stage 2 not Verify S2 is indicated on Air Aq Adjust Air Aquastat Stage 2 set active uastat display point See Plenum Heater Trou bleshooting section FAULT CODE TROUBLESHOOTING pu Fault PossibleCause Verification Recommended Action Correct wiring if voltage not pre sent Faulty wiring Air Cool Aquastat Stage 2 is faulty Replace Air Cool Aquastat if volt age not present Faulty wiring Correct wiring if voltage not pre sent Plenum Heater does not activate Fault Code 1 High Pressure Control trol open Must be a signal present on 1 for this test HP pressures must be at static levels Faulty Control Board Fault Code 2 Low Pressure Control Faulty Low pressure con trol open Must be a signal present on 1 for this test HP pressures must be at static levels Faulty Control Board Unit out of refrigerant Fault Code 3 Flow Switch Flow switch jumper re moved or faulty Faulty High Pressure Con Verify if there is 24VAC across HP1 on the Control Board and C of the terminal strip as well as HP2 and C 24VAC is present across HP1 and C1 and HP2 and C but no voltage is present across CC on the Control
49. ations may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state and from Canadian province to Canadian province Please refer to the MG Installation Installation and Service Manual for operating and maintenance instructions An extended warranty option is also available Please contact Maritime Geothermal Ltd via the contact information in the previous paragraph for more information
50. below the desired setpoint 3 Call from the Air Aquastat because the temperature in the room has dropped below the desired setpoint The modes of operation for each of these activation meth ods are described below 1 UNIT ACTIVATED BY DE HUMIDISTAT A Without A C option With no other controls active RV 1 is active and the default rejection mode is air re heat refer to 000353RCD In this mode the energy extracted from the dehu midification process is injected back into the pool room air along with the compressor and fan energy for a net energy increase equal to the compressor and fan electrical consumption In this mode the air is dehumidified and heated at the same time This can lead to overheating the room in some cases if the pool room temperature is satisfied and the pool water is satisfied If it is suspected that this may occur due to the climate of the region then an outdoor condenser unit A C option is recommended in order to reject the unwanted heat see A C OPTION OUTDOOR CONDENSER The unit will shut off once the dehumidification setpoint has been reached If the pool water temperature drops down to the Pool Aq uastat Stage 1 Stage 2 must be identical activation point the unit will override the air reheat mode and pool heat mode is activated The air reheat mode will remain locked out until the Pool Aquastat Stage 1 Stage 2 setpoint must be identical is reached The plenum heater will still operate during th
51. d height of 4ft to 5ft They should be placed in a location that is away from any splashing to prevent accidental damage to them They should not be placed directly in the path of any supply registers Doing so can yield values that are not representative of the conditions of the room and can cause short cycling The probes of the aquastats can be neatly strapped up The Pool Aquastat can be mounted by itself or with the others The probe should be placed in a dry well in the Indoor IN line to the heat pump If a dry well is not available then the probe can be strapped to the outside of the pipe but ensure it is well insu lated at least 6 at each end of it refer to 000145CDG 03 SYTEM OPERATION PRIORITY JUMPER PLACED The primary purpose of the pool conditioner unit is to main tain proper humidity levels in the pool room During this opera tion energy is removed from the air and can be rejected to either to the pool water the pool room air or optionally to an outdoor condenser unit TABLE 3 contains a truth table which indicates which modes are active based on the control signals Diagram A and Diagram B contain flow charts that indicate the control sequence as well ISSUE 03 17 NOV 2014 Page 7 There are three methods in which the PC unit can be activated 1 Call from the de humidistat because the humidity level has risen above the desired setpoint 2 Call from the Pool Aquastat because the pool temperature has dropped
52. dy up to temperature The unit should switch back to pool water heat mode but the electric plenum heater should remain on A C Mode If equipped 1 Adjust the Stage 1 and Stage 2 setpoints low enough to activate the stages The unit should switch to air conditioning mode and the outdoor condenser fan should start Verify that the suction and discharge pressures are approximately 90 110PSIG and 250 350PSIG Record the values after 10 minutes of runtime Final Inspection 1 Turn the power off to the unit and plenum heater if installed and remove all test equipment 2 Install the electrical box cover on the PC unit Install the electrical cover on the plenum heater if applicable 3 Do a final check for leaks in the indoor pool loop system and ensure the area is clean 4 Turn the power on to the unit and the plenum heater if installed Set the controls to the final values and record them on the startup record Startup Record 1 The installer shall sign and date the Startup Record and have the homeowner sign as well The installer shall leave the Startup Record with the homeowner retain a copy for filing and send a copy to Maritime Geothermal Ltd for warranty registration Post Startup Verification 1 is generally necessary to re visit the site after few days to verify that the system is operating properly as it may take some time to bring the pool up to temperature 2 Force the unit to pool water heat mode if it is not already in i
53. e Black Stripe Low Pres High Pres R410a 75psig R410a 565psig T C Air Aquasiat Pool Aquastat Wiring Y Control Board Plenum F STATUS 2 Heater 1 5 High Compressor 5 iri F 2 Low Relay Coil Wiring 3 Flow 5 a 3 3 Cool C1 1 1 Air Re heat Wiring O1 4 way valve Air Cool A C plenum heater is activated 4 way valve Stage 2 S2 of the Air Aquastat The plenum heater F F dry contact makes the signal for the W2 terminal of the ECM fan T T T T Petitcodiac NB MARITIME GEOTHERMAL 28 FEB 11 loving N mm eem Approved By 15 Initial Release GEDDES C GEDDES 20 OCT 11 Size Drawing Number REV SHEET Approved By Date Eco IMPLBY BY pare 907 001425SCH 01 1 of 1 ISSUE 03 17 NOV 2014 Page 47 001427MAN 01 ELECTRICAL DIAGRAMS 220 1 50 continued PC Series Electrical Box Diagram 220 1 50 Scroll ECM Fan Low Voltage Wiring 24VAC b Refer to 000145CDG 02 for more detail Ww De humidistat Wiring Use and 18 2 conductor cable to connect the om Heat Pump to the De humidistat Control Beard OO R 24VAC Hot 2 Y FLOW HP1HP2 Y Compressor ECM Fan 111111
54. e humidistat starts the unit in air re heat mode Stage 1 of the Air Aquastat will start the unit if not running mode remains air re heat Stage 2 of the Air Aquastat will engage the plenum heater Stage 1 and 2 of the Pool Aquastat will start the unit if not running override air re heat mode and switch to pool heat mode Optional AC will override both pool and air re heat modes to engage air conditioning mode Plenum Heater Pool Conditioner C OUT Return Air Supply Air Out E Plumbing Installation Steps Pool 00 Sensor 1 Install Tee s at M 8 Aquastat 2 Install a ball valve at O and T same size as existing line 3 Install 2 lines amp to heat pump connections 3 way valves installed here as well will facilitate future exchanger flushing 4 Adjust T and O see note below until the pressure at U is 350 400PSIG for R410a units 225 250 for R407c units with the unit running at the current pool temperature Probe Pool Verify the pressure at U and readjust O and T as necessary to obtain the pressure from Step 4 once the pool reaches the setpoint temperature Intermediate adjusment may be required if the unit trips a safety control as the pool temperature rises NOTE Reduce the flow through the unit to increase the pressure at U Start with T and O fully open If there
55. eased over the glass and drawn to the return air grill of the PC with as little travel as possible over the pool surface ISSUE 03 17 NOV 2014 Page 21 001427MAN 01 TABLE 15 Duct Sizing Guide external static of 0 20 20 gt lt o X o 6 5 x 6 5 8x8 8x8 8 5 x 8 5 8 5 x 8 5 9 5 x 9 5 11 x 11 11 x 11 12 x 14 12 x 14 15 x 15 15 x 15 16 x 17 16 x 17 18 x 19 18 x 19 20 x 20 20 x 20 22 x 22 22 x 22 24 x 24 26 x 26 26 x 26 28 x 28 28 x 28 30 x 30 30 x 30 30 x 32 30 x 32 i Diameter Duct Area Rectangular Equivalents in 680 3954 4 8x22 9x19 10x17 11x15 995 154 1 8x22 9x19 10x17 11x15 13825 201 16 8x30 10x22 12x18 14x16 150 2001 16 8x30 10x22 12x18 14x16 150 254 18 8x40 10x30 12x24 14x20 2000 254 18 8x40 10x30 12x24 14x20 2250 314 20 10x38 12x30 14x26 16x22 2600 20 10x38 12x30 14x26 16x22 2900 22 i12x36 14x30 16x26 18x23 3400 22 12 36 14x30 16x26 18x23 3600 452 24 x38 16x32 18x28 20x25 4800 452 24 14 38 16x32 18x28 20x25 5250 5 26 16x38 18x32 20x30 22x24 6025 66 28 18x38 20x34 22x30 24x28 6500 28 18x38 20x34 22x30 24x28 7250 77 30 20x40 22x38 24x32 26x30 707 30 20x40 22x38 24x32 26x30 804 32 22x40 24x38 26x34 28x32 9200 804 32 22x40 24x3
56. ect Gnd Aquastat Stage 2 S2 NO and C to Plenum Heater 1 1 Gnd Lug 208 230VAC CONNECTIONS Wire Colour Contactor Label Line 2 Red Heat Pump Electrical Service Requirements IMPORTANT NOTE Line 1 11 208 230VAC Single Phase 60Hz 208 230 1 60 FOR 208 1 60 POWER Model Min Circuit Min Wire TD Fuse or Connect to Gnd Lug Size Ampacity Gauge Breaker Ensure red wire is connected 45 27 8 2 40 to the 208 terminal on the 55 35 6 2 50 transformer instead of the 42 6 2 60 230V terminal 80 51 6 2 60 pRB 11 11 11 E4Z 6H4 1 S Sn p Approved ENG Dats ans __ 15 Electrical Box Diagram Em Eco IMPLBY APVD BY DATE A 001424ELB 01 1 of 1 3 001427MAN 01 Page 46 ISSUE 03 17 NOV 2014 ELECTRICAL DIAGRAMS 220 1 50 PC Series Schematic Diagram 220 1 50 Scroll ECM Fan 11 12 Gnd 220VAC y 4 Potential Relay Air Flow Select 750 6 White Black Stripe Time Med Nom Default ai High 6 14 5 Fuse Max 12 2 4 14 lt gt N Time N Delay 4 A f 100 Control russ CN YYA White Black Stripe Required Connections Whit
57. ed In this mode the energy extracted from the dehu midification process is injected back into the pool room air along with the compressor and fan energy for a net energy increase equal to the compressor and fan electrical consumption In this mode the air is dehumidified and heated at the same time If the pool room air temperature continues to drop and reaches The Air Aquastat Stage 2 activation point the plenum heater will activate The plenum heater operates independently of the PC unit and will remain on until Stage 2 setpoint is reached even if the PC unit cycles off Note that if the PC unit does cycle off during this time the fan will remain on until Stage 2 setpoint has been reached and the plenum heater shuts off If the pool water temperature drops down to the Pool Aq uastat Stage 1 activation point the unit will remain in air re heat mode if Stage 1 of the Air Aquastat is still active If the pool water temperature drops down to Pool Aquastat Stage 2 activa tion point the air reheat mode is locked out and pool heat mode is activated The air reheat mode will remain locked out until the Pool Aquastat Stage 2 setpoint is reached The plenum heater will still operate during this time if the pool room air temperature drops to the Air Aquastat Stage 2 activation point B With A C option Operation of the system with the A C option is the same as in section A except for when the pool room air temperature is above the Air Cool Aquas
58. ended Action Problem with controls See Controls Troubleshooting sec tion Faulty reversing valve so lenoid coil RV 1 Verify solenoid by removing it from the shaft while the unit is running There should be a loud whoosh sound when it is removed Replace solenoid if faulty Faulty reversing valve RV 1 TXV adjusted too far closed TXV stuck almost closed or partially blocked by for eign object Filter drier plugged Unit is overcharged Only possible if unit has been opened in the field and incorrectly charged Entering air temperature too cold A click can be heard when the is energized but the unit continues to heat instead of cool Verify superheat It should be be tween 8 12 F 3 6 C Superheat will be high if TXV is closed too far Adjusting the TXV does not affect the superheat or the suction pres sure Feel each end of the filter drier it should be the same temperature If there is a temperature difference then it is plugged Also causes low suction pressure High sub cooling low delta T across air coil Measure return air temperature Should be above 60 F 15 Most likely will only occur during initial startup Replace reversing valve Adjust TXV to obtain 8 12 F 3 6 C superheat Adjust the TXV all the way in and out a few times to loosen it Replace TXV ifthis does not work Replace filter drier Remove 1 2lb of refrigerant at a time a
59. er heat modes until the Stage 1 setpoint of the Pool Aquastat is reached If the pool water temperature drops down to Pool Aquastat Stage 2 activation point the air reheat mode is locked out and pool heat mode is activated The air reheat mode will remain locked out until the Pool Aquastat Stage 2 setpoint is reached The plenum heater will still operate during this time if the pool room air temperature drops to the Air Aquastat Stage 2 activation point If the pool room air temperature continues to drop and reaches The Air Aquastat Stage 2 activation point the plenum heater will activate The plenum heater operates independently of the PC unit and will remain on until Stage 2 setpoint is reached even if the PC unit cycles off Note that if the PC unit does cycle off during this time the fan will remain on until Stage 2 setpoint has been reached and the plenum heater shuts off ISSUE 03 17 NOV 2014 TABLE 4 PC Control System Operation Truth Table Priority Jumper Placed CONTROLS SYSTEM OPERATION Heater Re Heat Condenser Ox 11111 S S LLL x X X x x x x 1 x L X e 1 x x IL y x x 0 1 0 1 1 LLL d LL o o 1 1 x x x 0 ee X
60. eversing valve body and refrigerant metering device for five 5 years from the Warranty Inception Date Labour costs are not covered by this Limited Express Residential Warranty to the extent they exceed the amount allowed under said allowance schedule they are not specifically provided for in said allowance schedule they are not the result of work performed by MG authorized service personnel they are incurred in connection with a part not covered by this Limited Express Residential Warranty or they are incurred more than the time periods set forth in this paragraph after the Warranty Inception Date This warranty does not cover and does not apply to 1 Air filters fuses refrigerant fluids oil Products relocated after initial installation Any portion or component of any system that is not supplied by MG regardless of the cause of the failure of such portion or component Products on which the unit identification tags or labels have been removed or defaced Products on which payment to MG or to the owner s seller or installing contractor is in default Products subjected to improper or inadequate installation maintenance repair wiring or voltage conditions Products subjected to accident misuse negligence abuse fire flood lightning unauthorized alteration misapplication contaminated or corrosive liquid or air supply operation at abnormal air or liquid temperatures or flow rates or opening of the refrigerant circuit by unqua
61. f proper signal isn t present re place Fan Control Signal Har ness If proper signal is present replace fan motor head Fan Power Harness faulty Or Faulty motor Insert the tips of the voltmeter probes into the back of the connect or at the fan to measure the voltage across the red and black wires val ue should be 230VAC Page 36 Replace Power Harness if 230VAC is not present replace motor if 230VAC is present ISSUE 03 17 NOV 2014 PLENUM HEATER TROUBLE SHOOTING No 230VAC Disconnect switch open across plenum if installed heater L1 and L2 Verification Verify disconnect switch is in the ON position Recommended Action Determine why the disconnect switch was opened if all is OK close the switch Fuse blown Breaker Tripped At plenum heater disconnect box if installed voltmeter shows voltage on the line side but not on the load side Check if breaker is tripped Reset breaker or replace fuse at plenum heater disconnect box Replace fuse with proper size and type Time delay type Same Line to L1 and L2 No 24VAC signal from C to ground at the plenum heater control connector Plenum Heater transform er is burned out Plenum heater control board is faulty No 24VAC signal from 1 to ground at the plenum heater control connector Faulty wiring Measuring L1 to ground and L2 to ground both yield 115VAC but L1 to L2 yields OVAC Voltmeter
62. ing this time the Stage 2 activation point of the Air Aquastat is reached the plenum heater will engage to re heat the air The plenum heater operates independently of the PC unit and will remain on until Stage 2 setpoint is reached even if the PC unit cycles off Note that if the PC unit does cycle 001427MAN 01 off during this time the fan will remain until Stage 2 setpoint has been reached and the plenum heater shuts off 3 UNIT ACTIVATED BY AIR AQUASTAT STAGE 1 In this scenario the de humidistat is satisfied and the Pool Aquastat is satisfied but the air temperature has dropped to the Stage 1 activation point of the Air Aquastat The unit will start and operate in air reheat heat mode and begin dehumidifying re heating the pool room If during this time the Stage 2 activa tion point of the Air Aquastat is reached the plenum heater will engage to help re heat the air The plenum heater operates independently of the PC unit and will remain on until Stage 2 setpoint is reached even if the PC unit cycles off TABLE 3 PC Control System Operation Truth Table Priority Jumper Placed CONTROLS De Humidistat STAGE 1 Air Aquastat STAGE 1 STAGE 2 Aquastat STAGE 1 Pool Aquastat STAGE 1 STAGE 2 SYSTEM OPERATION Air Re Heat Outdoor Pool Water Peter X X X X X X X X X X X x x X X X X X X X X
63. is time if the pool room air temperature drops to the Air Aquastat Stage 2 activation point B With A C option Operation of the system with the A C option is the same as in section A except for when the pool room air temperature is above the Air Cool Aquastat activation points This also implies that the pool room temperature is above the Air Aquastat Stage 1 setpoint refer to controls The Air Cool Aquastat engages both RV 1 and RV 2 to enable air cooling mode refer to 000354RCD If there is a call for dehumidification and the air temperature is above or equal to the Stage 1 activation point of the Air Cool Aquastat the ab sorbed energy from the pool room air will be discarded outside via the outdoor condenser unit instead of being rejected into the air or pool This allows the pool room to be de humidified and cooled The Air Cool Aquastat Stage 1 and Stage 2 setpoints must be identical and must be equal to or higher than the Air Aquastat Stage 1 setpoint Once the Air Cool Aquastat set points have been reached the unit will revert back to air or pool water mode Operation after this is identical to that described in section A 2 UNIT ACTIVATED BY POOL AQUASTAT STAGE 1 2 In this scenario the de humidistat is satisfied but the pool water temperature dropped to the Stage 1 activation point of the Pool Aquastat The unit will operate in pool heat mode and begin dehumidifying cooling the pool room and heating the pool water If dur
64. ischarge pressure and will shut the compressor down if the condensing pressure becomes too high There some key reasons why this control would activate in response to the operating conditions of the unit depending on the mode of operation 1 Low or no airflow re heat or A C mode 2 High return air temperature re heat or A C mode 3 Dirty air coil due to poor filter maintenance re heat or A C mode 4 Low or no flow through unit water condenser pool water mode 5 Unit water condenser dirty or fouled pool water mode ISSUE 03 17 NOV 2014 Page The unit contains a control board that monitors the safety controls and operates the compressor accordingly Refer to APPENDIX A for control board specifications The low pressure control is connected to LP1 and LP2 The high pressure control is connected to HP1 and HP2 The control board also has provisions for a flow switch The flow switch is unused from the factory and a jumper wire is placed across the FLOW SWITCH terminals If a flow switch is desired the jumper can be removed and the two leads from the flow switch can be connected to the FLOW SWITCH terminals on the safety board The flow switch is ignored for 30 seconds on compressor startup to allow time for flow to be established The high and low pressure controls are monitored at all times The compressor will not be able to start if either of them has a fault The control board has an on board LED and a FAULT pin wi
65. lified personnel Mold fungus or bacteria damage Corrosion or abrasion of the product Products supplied by others Products which have been operated in a manner contrary to MG s printed instructions Products which have insufficient performance as a result of improper system design or improper application installation or use of MG s products Electricity or fuel or any increases or unrealized savings in same for any reason whatsoever m 5 2 3 4 5 6 7 8 9 1 1 1 1 8 9 10 11 12 13 7 Except for the limited labour allowance coverage forth above MG is not responsible for 1 The costs of fluids refrigerant or system components supplied by others or associated labour to repair or replace the same which is incurred as a result of a defective part covered by MG s Limited Residential Warranty 2 The costs of labour refrigerant materials or service incurred in diagnosis and removal of the defective part or in obtaining and replacing the new or repaired part 3 Transportation costs of the defective part from the installation site to MG or of the return of that part if not covered by MG s Limited Express Residential Warranty 4 The costs of normal maintenance This Limited Express Residential Warranty applies to MG Residential Class products manufactured on or after February 15 2010 MG S LIABILITY UNDER THE TERMS OF THIS LIMITED WARRANTY SHALL APPLY ONLY TO
66. mpressor and fan Air re heat mode Cooling Mode Page 6 These signals are only required if the A C option outdoor condenser unit is connected to the PC unit TABLE 2 shows typical settings for the each of the con trols These are the recommended settings setpoints may be adjusted as desired but there are a few rules that must be observed for proper system operation e Air Aquastat delta s should not be set larger than the values in the table e Pool Aquastat Stage 1setpoint should not be any more that 2 F below the Air Aquastat Stage 1 setpoint e Air Cooling Aquastat setpoints must be equal to preferred or higher than the Air Aquastat Stage 1 setpoint e Cooling Aquastat Stage 1 and Stage 2 setpoints and delta s must be set identical ISSUE 03 17 NOV 2014 TABLE 2 Typical PC Control Settings AIR AQUASTAT Stage 1 c Setpoint Setpoint Delta Activation POOL AQUASTAT C Setpoint 80 78 Activation 78 DE HUMIDISTAT 5596 Activation is indirectly set by the Setpoint and Delta val ues Stage 1 and Stage 2 setpoint and Delta values must be identical for the Air Cooling Aquastat 80 and 2 if Priority Jumper is placed must be identical to Stage 1 values CONTROL MOUNTING LOCATIONS The De humidistat Air Aquastat and Air Cooling Aquastat if installed should be mounted close to one another in the pool room at a recommende
67. nd test mode LED fault codes for lockout status Test mode for reduced test time Conformally coated for moisture protection Lockout Protection Module Mode of Operation The contro will begin the S minute time delay upon a Y call from the therrmosat After the time delay expires the compressor contactor Will be energized as long as the high and low switches are closed If either switch is open after the delay expires the compressor will not energize either switch opens while the compressor is energized it will irmmeciately and begin the anti short cycle delay compressor will not be allowed to en again until the anti short cycle delay expires and both pressure switches are closed The flow switch will have a 30 second bypass timer in which the control will ignore an open flow switch for the first 30 seconds if the flow switch remains open after the 30 second timor expires the unit will de energize the compressor and begin the anti snort cycie delay If the control experiences threw pressure low pressure or fow switch faults in 60 minuto perd it will lockout the compressor and energize the fault output A manual reset of power will be required to reset tne lockout condition The control has status LED to indicate which type of fault or lockout has occurred If pressure Fault or lockout occurs tre 4tatus LED wil blink once Ir a lo
68. nd verify that the discharge pressure reduces See Fan Troubleshooting section Correct the problem Use the plenum heater to heat the room up until the unit func tions properly ISSUE 03 17 NOV 2014 TXV stuck almost closed or partially blocked by for eign object Low refrigerant charge Faulty compressor not pumping Adjusting the TXV does not affect the superheat or the suction pres sure TXV may be frosting up Entering liquid temperature flow and entering air temperature are good but suction is low Check static re frigeration pressure of the unit for a very low value Pressures change only slightly from static values when compressor is started Page 31 Adjust the TXV all the way in and out a few times to loosen it Replace TXV ifthis does not work Locate the leak and repair it Spray nine a sniffer and dye are common methods of locating a leak Replace compressor 001427MAN 01 High Suction Pressure may appear to TXV adjusted too far Leaking check valve be tween water condenser and receiver inlet Leaking check valve be tween outdoor condenser and receiver inlet if equipped Verify superheat It should be be tween 8 12 F 3 6 C Superheat will be low if TXV is open too far Adjusting the TXV does not affect the superheat or the suction pres sure Low super heat and dis charge pressure Check valve is cold to the touch and does not warm up
69. nected to Generally this is in the pool room or in the mechanical room in order to minimize piping distances If ductwork is used then it is good practice to center the unit with respect to the ductwork when possible to facilitate air distribu tion If possible the access panels should remain clear of obstruction for a distance of two feet to facilitate servicing and general maintenance Ensure the unit is level to eliminate any possible condensate drain issues Raising the heat pump off the floor a few inches is generally a good practice since this will prevent rusting of the bottom panel of the unit We recommend that the heat pump be placed on a piece of 2 thick styrofoam The styrofoam will smooth out any irregularities in the cement floor and deaden any compressor noise emitted from the bottom of the cabinet The unit can also be suspended with a proper rack system able to bear a recommended two times the weight of the unit The unit has an air filter rack which can be installed with the removable end where the filter is inserted on either side to facilitate changing the filter WARNING is recommended that pool chemicals be stored away from the unit to prevent any premature corrosion problems The should not be stored in the same room as the PC unit WARNING Pool chemicals should be injected into the system downstream of the PC unit 001427MAN 01 ELECTRICAL CONNECTIONS The PC unit has a concentric 1 093 0 875 k
70. nks may be insulat ed with acoustical duct insulation to further inhibit any noise from the unit from travelling down the ductwork If a plenum heater is installed insulation should not be placed within 12 of the heater elements Drawing 001032CDG shows a typical installation SUPPLY DUCT SYSTEM The care and attention devoted to setting up the air distribution system can make or break any indoor pool conditioning system Important factors to consider are listed below 1 Sufficient air must be moved within the pool enclosure to satisfy the requirements of both the occupants of the room and the heat pump system with maximum flow directed over the outside windows and doors and minimum flow directly over the exposed surface of the pool itself 2 To prevent air stagnation and stratification the system must provide at least 4 to 8 room air changes per hour 3 The PC unit supply air ductwork must be adequately sized to handle 1200 to 2100 cfm of air depending on the model with no more than 20 of external static pressure TABLE 15 has a duct sizing guide help in selecting adequate duct sizes 4 An duct system is usually the most effective method of supplying air to the room refer to diagram C Distribution of the conditioned air will be most effective if the air is released 001427MAN 01 Page from the floor and allowed to rise upwards over the glass surfaces It is important to try and blanket the e
71. nockout for power supply connection to the electrical box There are three 1 2 openings with plastic grommets grommet hole is 3 8 in the upper section of the electrical box for connections to the external controls A schematic diagram and electrical box layout diagram ELB can be found inside the electrical box cover of the unit as well as in the Model Specific section of this manual The Electri cal Tables in the Model Specific section and the ELB diagram contain information about the size of wire for the connections as well as the recommended breaker size A properly qualified electrician should be retained to make the connections to the heat pump and associated controls The connections to the heat pump MUST CONFORM TO LOCAL CODES CONTROL REQUIREMENTS The PC Series unit comes with the following controls e 2 Two stage aquastats e 1 De humidistat One of the aquastats is used to control the pool room tem perature and will be referred to as the Air Aquastat from now on The other is used to control the pool temperature and will be referred to as the Pool Aquastat If the A C option outdoor condenser unit is installed then a third two stage aquastat is required to control the air cooling mode The electrical diagrams on the electrical box cover provide a description of the signal connections as does TABLE 1 TABLE 1 Control Signal Description Description 24VAC Common Ground E 24VAC Hot Heat Pump Co
72. nt recovery unit to the heat pump service ports via a refrigeration charging manifold and to a recovery tank as per the instructions in the recovery unit manual If there was a compressor burn out the refrigerant cannot be reused and must be disposed of according to local codes All water coil heat exchangers must either have full flow or be completely drained of fluid before recovery begins Failure to do so can freeze and rupture the heat exchanger voiding its warranty Note that this does not apply to double wall domestic hot water exchangers desuperheater coils Ensure all hose connections are properly purged of air Start the refrigerant recovery as per the instructions in the recovery unit manual Allow the recovery unit suction pressure to reach a vacuum Once achieved close the charging manifold valves Shut down purge and disconnect the recovery unit as per the instructions in its manual Ensure the recovery tank valve is closed before disconnecting the hose to it Connect a nitrogen tank to the charging manifold and add nitrogen to the heat pump until a positive pres sure of 5 10PSIG is reached This prevents air from being sucked into the unit by the vacuum when the hoses are disconnected The heat pump is now ready for repairs Always ensure nitrogen is flowing through the system during any soldering procedures to prevent soot buildup inside the pipes Maritime Geothermal Ltd recommends re placing the liquid line filter drier any
73. ntire surface of glass windows and metal doors with a film of dry air from the pool conditioner to prevent accumulation of condensation at the corners or bottom of the glass If a ceiling ducted system is chosen refer to diagram E then the supply air should be of sufficient velocity to ensure that air flows over the glass all the way down to the bottom of the window 5 Linear supply grills should be placed near all glass areas exposed to outside temperatures for optimum operation 6 Additional care should be taken to see that air flow is not directed across the pool surface since moisture loss from the pool water will be greatly increased under these conditions 7 If a floor distribution system is not possible then ceiling ducts should be positioned to blow down over the exposed glassed areas of the room perimeter It may be necessary to increase the airflow refer to the FAN MOTOR section to accommodate the more difficult job of forcing the air exiting the supply ducts down over the glass RETURN DUCT SYSTEM The air inlet of the return duct system should ideally be placed 10 to 15 ft above the pool level Placing this duct inlet in an elevated position will ensure that air movement travels in an upward fashion if it is introduced from the floor An air flow pattern which causes minimum airflow across the pool surface should be constructed to minimize evaporation from the pool surface See duct diagram layout Large volumes of air
74. nto the fan motor Gently tug on each wire to verify it is properly inserted into the connector Clean The ECM fan will provide proper airflow up to 0 5 2 for 1 2HP motors and 0 7 2 for 1HP motors The ductwork is poorly designed or greatly undersized if the fan motor cannot provide the required airflow Select a higher setting Repair any loose connections Faulty Control Signal Har ness or faulty motor head Fan Control Signal Har ness and or Fan Power Harness is loose Faulty Control Signal Har ness or Faulty motor head Measure 24VAC between White pin 3 and the following at the fan con trol signal harness insert probes in connector where wire is inserted do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow pin 6 Stage 2 Yellow Black pin14 Stage 3 Violet pin 2 Verify that the connector is properly inserted into the fan motor Gently tug on each wire to verify it is properly inserted into the connector Measure 24VAC between White pin 3 and the following at the fan con trol signal harness insert probes in connector where wire is inserted do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow pin 6 Stage 2 Yellow Black pin14 Stage 3 Violet pin 2 If proper signal isn t present place Fan Control Signal Har ness If proper signal is present replace fan motor head Repair any loose connections I
75. of the pool increases the evaporation rate Ducting should de designed to minimize the airflow across the pool to reduce this effect See the Supply Duct Section for more info 4 Room air temperature As mentioned in 1 the pool room temperature is normally kept slightly above the water temperature to minimize the amount of evaporation taking place 5 Room relative humidity The relative humidity setpoint for most pool areas is from 50 to 60 Lowering the relative humidity setpoint will increase the evaporation rate from the pool thus causing the pool conditioner to run longer but may be necessary to prevent condensation on some glass surfaces during cold weather Relative humidity should be set only low enough to prevent condensation from occurring on windows and doors TABLE 8 gives a step by step explanation of how to deter mine the evaporation rate of the pool Once the Pool Evapora tion Rate ERp has been calculated then the proper size unit can be selected from TABLE 9 10 based on the Non Active Humidity Level TABLE 9 or 10 also gives a general idea as to the size of pool that can be accommodated by each model size for a typical residential installation This is just a guideline the Pool Evapo ration Rate ERp should be calculated as per TABLE 8 TABLE 9 Typical PC Unit Sizing Guide 60Hz Moisture Moisture Area Removal Removal 50 RH 60 RH L s ft m Lbs kg
76. ork Replace check valve Leaking check valve be tween outdoor condenser and receiver inlet if equipped Check valve is cold to the touch and does not warm up Replace check valve Leaking reversing valve RV 1 or RV 2 Common suction line is warm com pressor is running hot Replace reversing valve Faulty compressor not pumping Low or no airflow Pressures change only slightly from static values when compressor is started See Fan Troubleshooting section Note low airflow will cause the air coil to ice up once the suction drops below 90PSIG Replace compressor Correct the problem TXV stuck almost closed or partially blocked by for eign object Adjusting the TXV does not affect the superheat or the suction pres sure TXV may be frosting up Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Low or no refrigerant charge See Low Suction Pressure in this section TXV stuck almost closed or partially blocked by for eign object Faulty compressor contactor Intermittent fan ISSUE 03 17 NOV 2014 Entering air temperature and air flow are good but suction is low Check static refrigeration pressure of unit for very low value Adjusting the TXV does not affect the superheat or the suction pres sure Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan
77. ould switch to Air Re heat mode Air Re heat Mode 1 Check the refrigeration gauges on the unit The suction and discharge pressures will depend on the room temperature but they should be about 90 110PSIG and 250 350PSIG respectively for a typical start up 2 Monitor the refrigeration gauges while the unit runs Record the following after 10 minutes of runtime 1 Suction pressure 2 Discharge pressure 3 Duct Return temperature poke a small hole in the flex collar and insert probe in airstream 4 Duct Supply temperature poke a small hole in the flex collar and insert probe in airstream 5 Duct Delta T should be between 4 9 F 2 5 6 Compressor L1 C current black wire place meter between electrical box and compressor Electric Plenum Heat if installed 1 Adjust the Air Aquastat Stage 2 value to 3F less that the desired pool room temperature or high enough to activate the stage if the room is already up to temperature 2 Remove the electrical cover from the plenum heater Place a current clamp meter around one of the supply wires Turn on the power to the plenum heater Verify that the current draw increase as each stage is activated 10kW has 2 stages 15kW has 3 stages and 20kW has 4 stages Record the final current draw on the startup record Air Re heat Lockout Verification 1 Adjust the Pool Aquastat Stage 2 value to 2F less that the desired pool room temperature or high enough to activate the stage if the pool is alrea
78. ow There should be a 5 minute delay on power up allowing enough time to enter the settings before the unit starts Pool Air Air Cool Annumciator Description Aquastat Aquastat Aquastat For Temperature Scale 51 blinking Stage 1 Setpoint DIF 1 blinking Stage 1 Differential S2 blinking Stage 2 Setpoint DIF 2 blinking Stage 2 Differential C2 H2 Stage 2 Heating or Cooling Mode t s 9 _ 2 fa Cum Stage 1 Heating or Cooling Mode 9 2 1 ing or c 3 Lower the de humidistat all the way The unit should start within 5 minutes 4 Measure the following voltages on the compressor contactor and record them on the startup sheet L1 L2 L2 L3 L1 L3 only L1 L2 for single phase units ISSUE 03 17 NOV 2014 Page 23 001427MAN 01 UNIT STARTUP continued Pool Water Heating Mode 1 Monitor the suction and discharge pressures on the gauges on the side front of the unit Adjust the flow through the unit as per 000145CDG 03 until a discharge pressure of 350 400PSIG is obtained 2 The suction and pressure will depend on the room temperature but it should be about 90 110PSIG for a typical start up Record the value after 10 minutes of runtime 3 Adjust the Air Aquastat Stage 1 setpoint to the desired pool room temperature or high enough to activate the stage if the room is already up to temperature The unit sh
79. play Verify 24VAC across COM and Stage 1 C of the Air Aquastat Verify 24VAC across COM and otage 1 NO of the Air Aquastat No action system is functioning properly Correct wiring if voltage not pre sent Replace Air Aquastat if voltage not present Faulty wiring Pool Aquastat Stage 2 or wiring is faulty Verify 24VAC across COM and Stage 2 NC of the Pool Aquastat Verify 24VAC across COM and otage 2 C of the Pool Aquastat Correct wiring if voltage not pre sent Replace Pool Aquastat Faulty wiring Air Cool Aquastat Stage 1 and Stage 2 settings not set identical Verify 24VAC across O and C of the terminal strip Verify settings Correct wiring Correct settings Air Cool Aquastat Stage 1 and Stage 2 not active Faulty wiring Air Cool Aquastat Stage 1 or wiring is faulty Faulty wiring Verify 51 and S2 are indicated the Air Cool Aquastat display Verify 24VAC across COM and Stage 1 C of the Air Cool Aquastat Verify 24VAC across COM and Stage 1 NO of the Air Cool Aquastat Verify 24VAC across C and O1 of Adjust Air Cool Aquastat Stage 1 and Stage 2 setpoints Correct wiring if voltage not pre sent Replace Air Cool Aquastat if volt age not present Correct wiring if voltage not pre sent the PC unit terminal strip Page 28 ISSUE 03 17 NOV 2014 CONTROLS TROUBLESHOOTING continued Fault Possible Cause Verific
80. pped vented and free of debris Ensure the unit is sitting level to prevent overflow of the condensate drip tray If a plenum heater has been installed verify that it is securely fastened to the ductwork amp C9 Indoor Loop Pool Loop 1 Verify there are no leaks in the connections to the unit 2 Verify that the bypass is set up and there flow as per 000145CDG Electrical 1 Ensure the power to the unit is off Ensure the power to the plenum heater is off if equipped 2 Remove the electrical box cover 3 Verify all high voltage connections Ensure that there are no stray wire strands all connections are tight and the ground wire is connected tightly to the ground connector for the unit and plenum heater 4 Record the fuse circuit breaker size and wire gauge for the unit Record the fuse circuit breaker size wire gauge and size of the plenum heater if installed 5 Set the de humidistat to its highest setting 6 Ensure all access panels are in place UNIT STARTUP The unit is now ready to be started The steps below outline the procedure for starting the unit and verifying proper operation of the unit It is recommended that safety glasses be worn during the following procedures Preparation 1 Turn the power on to the unit and verify that the Air Aquastat Pool Aquastat and Air Cool Aquastat if equipped power up 2 Adjust the Air Aquastat and Pool Aquastat to the following settings in the table bel
81. r and can be rejected to either to the pool water the pool room air or optionally to an outdoor condenser unit TABLE 4 contains a truth table which indicates which modes are active based on the control signals Diagram C and Diagram D contain flow charts that indicate the control sequence as well There are two methods in which the PC unit can be activated 1 Call from the de humidistat because the humidity level has risen above the desired setpoint 2 Call from the Pool Aquastat because the pool temperature has dropped below the desired setpoint The modes of operation for each of these activation meth ods are described below 1 UNIT ACTIVATED BY DE HUMIDISTAT A Without A C option With no other controls active the default rejection mode is pool water refer to 000352RCD In this mode the pool room air is dehumidified and cooled while the pool water is heated regardless of whether or not there is a call from Stage the Pool Aquastat This can lead to overheating the pool in some cases if the pool room temperature is high enough If it is suspected that this may occur due to the climate of the region then an outdoor condenser unit A C option is recommended in order to reject the unwanted heat see A C OPTION OUTDOOR CONDENSER If the pool room cools down enough to reach the Air Aq uastat Stage 1 activation point activation point setpoint del ta RV 1 is energized refer to 000353RCD and re heat mode is activat
82. r cooling or H2 for heating Press the UP or DOWN key to toggle between the C2 or H2 designation NOTE For PC units the mode for both stages of the Air Aquastat and the Pool Aquastat is set to the H designation If the A C option is added to the system the mode for both of its stages are is set to C NOTE The ETC will automatically end programming if no keys are depressed for a period of 30 seconds Any settings that have been input to the control will be accepted at that point All control settings are retained in non volatile memory if power to ETC is interrupted for any reason Re programming is not necessary after power outages or disconnects unless different control settings are required Page 53 001427MAN 01 THIS PAGE INTENTIONALLY LEFT BLANK 001427MAN 01 Page 54 ISSUE 03 17 NOV 2014 THIS PAGE INTENTIONALLY LEFT BLANK ISSUE 03 17 NOV 2014 Page 55 001427MAN 01 LIMITED EXPRESS WARRANTY It is understood that unless a seeen 15 identified warranty statements made by Maritime Ltd corporation registered New Brunswick Canada its representatives relating to MG s products whether oral written or contained in any sales literature catalogue or agreement are not express warranties and do not form a part of the basis of the bargain but are merely MG s opinion or commendation of MG s products EXCEPT AS SPECIFICALLY SET FOR
83. r the suction pres sure Low super heat and dis charge pressure Check valve is cold to the touch and does not warm up Check valve is cold to the touch and does not warm up Adjust TXV to obtain 8 12 F 3 6 C superheat Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Replace check valve Replace check valve Common suction line is warm com Replace reversing valve pressor 18 running hot Pressures change only slightly from Replace compressor static values when compressor is started See Fan Troubleshooting section Note low airflow will cause the air coil to ice up once the suction drops below 90PSIG Adjusting the TXV does not affect the superheat or the suction pres sure TXV may be frosting up Entering air temperature and air flow are good but suction is low Check static refrigeration pressure of unit for very low value Correct the problem Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work Locate the leak and repair it Spray nine a sniffer and dye are common methods of locating a leak Pressures change only slightly from Replace compressor static values when compressor is started Compressor See Low Suction frosting up Pressure in this section TXV stuck almost closed or partially blocked by for eign object TXV frosting up Random Low Pressure trip does
84. re Removal Removal 50 RH 60 RH Moser cem 175 1200 566 1 500 708 2 100 991 1100 102 29032 _ Residential application with Tp 80 F Ta 82 F EWT 80F and EAT 82F TABLE 11 Evaporation Rate Chart 50 RH Lbs Hr ft Air Temperature Ta F 86 85 83 82 81 80 79 78 77 76 84 78 0 034 0 036 0 040 0 042 0 044 0 052 80 0 042 0 044 0 046 0 046 0 048 0 050 0 050 0 052 0 054 0 056 0 058 0 056 0 058 0 060 0 060 0 062 0 064 0 066 0 068 0 070 0 070 0 072 0 072 0 074 0 076 0 076 0 078 0 080 0 082 0 084 0 086 0 086 0 088 0 090 0 092 0 094 0 094 0 096 0 098 0 100 0 100 0 102 0 104 0 106 0 110 0 112 0 114 0 114 0 116 0 118 0 120 0 120 0 122 0 124 0 126 Pool Surface Area 1 4 41 1918 M 004 0 102 0 104 0 104 0 106 0 108 0 108 0 110 0 112 0 114 0 116 0 120 0 122 0 124 0 124 0 126 0 128 0 130 0 132 0 134 0 136 0 138 0 132 0 134 0 136 0 136 0 138 0 140 0 142 0 144 0 146 0 148 0 148 0 144 0 146 0 148 0 148 0 150 0 152 0 154 0 156 0 158 0 158 0 160 0 156 0 158 0 160 0 160 0 162 0 164 0 166 0 168 0 170 0 172 0 174 Recommended setpoints value TABLE 12 Evaporation Rate Chart 60 RH Lbs Hr ft 82 84
85. rify that the display is present on the thermostat If it is not proceed to POWER SUPPLY TROUBLE SHOOTING otherwise proceed to STEP 2 STEP 2 Remove the door and electrical box cover and check to see if there is a fault code on the control board If there is record the fault code Turn the power off wait 10 seconds and turn the power back on Set the thermostat to call for heating or cooling depending on what the reported problem was STEP 3 THERMOSTAT TROUBLESHOOTING section otherwise proceed to STEP 4 STEP 4 If a 24VAC signal does not appear across Y1 and C of the terminal strip within 6 minutes proceed to the If a fault code appears once a signal is present at Y1 and the compressor does not attempt to start proceed to the FAULT CODE TROUBLESHOOTING section otherwise proceed to STEP 5 STEP 5 If no fault codes appear and the compressor does not attempt to start attempts to start but cannot starts hard or starts but does not sound normal proceed to the COMPRESSOR TROUBLESHOOTING section otherwise proceed to STEP 6 STEP 6 If the compressor starts and sounds normal this means the compressor is OK and the problem lies elsewhere Proceed to the OPERATION TROUBLESHOOTING section NOTE To speed up the troubleshooting process the Test Jumper on the control board can be placed to the YES position to change the anti short cycle timer to 5 seconds Be sure to set it back to NO when servicing is complete
86. signal is required between the system controls and the condenser unit which is used to activate the fan This signal is the O1 signal of the PC unit If the condenser unit has own controls and transformer use a relay to isolate the sig nal Another method would be to control a contactor placed in the power supply to the condenser unit 001427MAN 01 Page 14 A C OPTION COLD WATER As an alternate for installations that require cooling a set of motorized 3 way valves can be place in the IN and OUT pool water lines connected to the unit refer to 001044CDG Connect the IN valve common port to the PC IN port the NO port to the supply from the pool and the NC port to a clean cold water source with it s own flow source such as a well It may also be necessary to install a regulating valve ie gate valve ball valve dole valve to restrict the flow to obtain the recommended discharge pressure of 350 400PSIG Connect the OUT valve common port to the PC OUT port the NO port to the return line to the pool and the NC port to a suitable drain The valves can be controlled by Stage 1 of an Air Cool Ther mostat When Stage 1 activates a signal is sent to the valves to energize them disconnecting the pool circuit and connecting the cold water circuit Additional wiring may be required to turn on the cold water pump system as well NOTE The Priority Jumper must be removed for this setup NOTE the power for these controls must not come
87. t and verify the discharge pressure of the unit Adjust the flow rate as per 000145CDG 03 to obtain a discharge pressure of 350 400PSIG again if required 3 If the pool is not close to the final temperature then anther visit and re adjustment of the flow is recommended 001427MAN 01 Page 24 ISSUE 03 17 NOV 2014 Installation Site Province Country 2 Homeowner Startup Record PC Series Size 45 80 R410a Startup Date Company Homeowner Phone Check boxes unless asked to record data circle units PRE START INSPECTION Indoor Pool 5 Ductwork is completed dampers diverters are adjusted Registers are open and clear of objects Air filter and end cap are installed Condensate Drain is connected trapped vented and free of debris Unit is sitting level Plenum heater is securely fastened if applicable No leaks in the connections to the PC unit ports There is flow and bypass is setup as per drawing 000145CDG High voltage connections are correct and securely fastened Circuit breaker or fuse size and wire gauge for Heat Pump Circuit breaker or fuse size wire gauge and Plenum Heater size Low voltage connections are correct and securely fastened Preparation Pool Water Heating Mode Air Re Heat Mode 10 minutes Plenum Heater Air Re heat Lock out A C Mode Final Inspection STARTUP DATA Aquastats set at values listed in table
88. tartup Record or six 6 months from date of unit shipment from MG whichever comes first the part If MG determines the part to be defective and within MG s Limited Express Residential Warranty MG shall when such part has been either replaced or repaired return such to a factory recognized distributor dealer or service organization freight prepaid The warranty on any part repaired or replaced under warranty expires at the end of the original warranty period To make a claim under this warranty parts must be returned to MG in Petitcodiac New Brunswick freight prepaid no later than ninety 90 days after the date of the failure of LIMITED EXPRESS RESIDENTIAL WARRANTY LABOUR This Limited Express Residential Labour Warranty shall cover the labour incurred by MG authorized service personnel in connection with the installation of a new or repaired warranty part that is covered by this Limited Express Residential Warranty only to the extent specifically set forth in the current labour allowance schedule A provided by MG s Warranty Department and only as follows 1 MG Units for two 2 years from the Warranty Inception Date 2 Thermostats auxiliary electric heaters and geothermal pump modules built or sold by MG when installed with MG Units for two 2 years from the Warranty Inception Date 3 Sealed refrigerant circuit components of MG Units which components only include the compressor refrigerant to air water heat exchangers r
89. tat NC S2 Pool Aquastat 51 Pool Aquastat HP Electrical Box HP Electrical Box S1 Air Aquastat Plenum Heater 52 Pool Aquastat C 52 Pool Aquastat HP Electrical Box Plenum Heater HP Electrical Box Plenum Heater 52 Air Aquastat Plenum Heater Applications with Air HP Electrical Box oz mnmn z oz z w v OOo lt lt 2 S2 Air Aquastat Cooling Option A C COM Aquastat HP Electrical Box 51 A C Aquastat HP Electrical Box C S1 A C Aquastat S1 A C Aquastat A C Aquastat S1 A C Aquastat S2 A C Aquastat S2 A C Aquastat HP Electrical Box Plenum Heater Refer to 00xxxxELB in manual or Heat Pump Electrical Box Air Cool A C PRIORITY JUMPER Place if air re heat mode is to be default typically placed 18 142 Mode Description cable The PC series heat pump primary function is pool room dehumidification which is controlled by the de humidistat may reject the absorbed energy from the air re heat mode pool room air pool water mode or air cooling mode outdoor condenser may also be activated by the Pool Aquastat as well Mode Priority Priority Jumper not placed The de humidistat starts the unit in pool he
90. tat activation points This also implies that the pool room temperature is above the Air Aquastat Stage 1 setpoint refer to controls Page 10 The Air Cool Aquastat engages both RV 1 and RV 2 to enable air cooling mode refer to 000354RCD If there is a call for dehumidification and the air temperature is above or equal to the Stage 1 activation point of the Air Cool Aquastat the ab sorbed energy from the pool room air will be discarded outside via the outdoor condenser unit instead of being rejected into the pool This allows the pool room to be de humidified and cooled without the risk of overheating the pool The Air Cool Aquastat Stage 1 and Stage 2 setpoints must be identical and must be equal to or higher than the Air Aquastat Stage 1 setpoint Once the Air Cool Aquastat setpoints have been reached the unit will revert back to pool water mode Operation after this is the iden tical to that described in section A 2 UNIT ACTIVATED BY POOL AQUASTAT STAGE 1 In this scenario the de humidistat is satisfied but the pool water temperature dropped to the Stage 1 activation point of the Pool Aquastat If no other controls are active then the unit will operate in pool heat mode and begin dehumidifying cooling the pool room and heating the pool water If during this time the Stage 1 activation point of the Air Aquastat is reached air re heat mode will begin The unit will continue to switch back and forth between air re heat and pool wat
91. th a 24VAC output An external indicator or relay can be con nected across the FAULT pin and ground if external signaling is desired Should a fault occur the LED will flash the code of the fault condition while the safety control in question is open The codes are shown in TABLE 6 The control board will lock out the compressor for five minutes when a fault occurs Three retries per fault condition are allowed within a 60 minute period If the fault condition occurs a fourth time the control board will permanently lock out the compressor and energize the FAULT pin This can only be reset by powering down the unit The LED will flash the fault code until the unit is reset TABLE 6 Control Board Fault Codes High Pressure Low Pressure 2 Flow Notused 3 If the control board enters permanent lockout mode there is a serious problem with the system and it must be rectified if the unit is to maintain good service POOL CIRCULATOR PUMP CONTROL Anytime the PC unit is activated and operating in pool heat mode there must be pool water flow through the Indoor Pool loop If the pool circulator pump is a single stage unit and oper ates 24 7 then this is not an issue If the pool pump is switched off and on or is a two stage or variable speed pump then addi tional controls must be added to ensure the pool circulator pump is on and operating at full capacity whenever the PC unit is op erating in pool heat mode
92. the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed STEP 5 Charge the unit refrigerant can be re used and operate it for 2 3 days Pump down the unit and replace the filter drier STEP 6 Charge the unit refrigerant can be re used and operate it for 2 weeks Pump down the unit and replace the filter drier STEP 7 Charge the unit a final time Unit should now be clean and repeated future burn outs can be avoided 001427MAN 01 Page 38 ISSUE 03 17 NOV 2014 REFRIGERATION CIRCUIT DIAGRAMS PC SERIES REFIGRATION CIRCUIT POOL HEAT MODE Air Condenser Evaporator lt Y Fan External Air Condenser Liquid Line 1 Vapour Line POOL WATER IN Drier Water Condenser lt Low Pressure a Cut out Service Bort Pressure Cut out ACTIVATION TABLE ENERGIZED RV 1 NO RV 2 NO Compressor Accumulator Chris Geddes GEOTHERMAL Petitcodiac NB __ 1 Checked Chris_Geddes Drawing Name PC Series Refrigeration Circuit Diagram Approved By ENG Pool Heat Mode Chris Geddes Size Drawing Number REV SHEET ECO IMPL BY APVD BY A 000352RCD 01 1 of 1 Approved By MFG Date ISSUE 03 17 NOV 2014 Page 39 001427MAN 01 09 JAN 07 DATE Approved By REFRIGERATION CIRCUIT DIAGRAMS continued
93. time the refrigeration system has been exposed to the atmosphere VACUUM AND CHARGING PROCEDURE STEP 1 After completion of repairs and nitrogen pressure testing the refrigeration circuit is ready for vacuuming STEP 2 Release the refrigerant circuit pressure and connect the vacuum pump to the charging manifold Start the vacuum pump and open the charging manifold valves Vacuum until the vacuum gauge remains at less than 500 microns for at least 1 minute with the vacuum pump valve closed STEP 3 Close the charging manifold valves then shut off and disconnect the vacuum pump Place a refrigerant tank with the proper refrigerant on a scale and connect it to the charging manifold Purge the hose to the tank STEP 4 Weigh in the appropriate amount of refrigerant through the low pressure suction service port Refer to the label on the unit or TABLE 16 Refrigerant Charge Chart for the proper charge amount STEP 5 the unit will not accept the entire charge the remainder can be added through the low pressure service port after the unit has been restarted REPLACMENT PROCEDURE FOR A COMPRESSOR BURN OUT Pump down the unit as per the Pump Down Procedure above Replace the compressor Replace the liquid line filter drier Vacuum the unit until it remains under 500 microns for several minutes with the vacuum pump valve closed STEP 4 Charge the unit and operate it for continuously for 2 hours Pump down the unit and replace the filter drier Vacuum
94. travelling near the pool surface can also cause bathers to feel cool whenever they emerge from the water PLENUM HEATER Optional For installations that do not already have a backup heat source such as electric baseboard wood stove propane etc it is recommended that a plenum heater be installed This pro vides two functions The first function of the plenum heater is to act as an auxiliary heat source for the pool room air As such it will provide addi tional heat on extremely cold days when the pool requires all of the unit runtime eliminating any discomfort to the homeowner The second function of the plenum heater is to provide emer gency heat should a problem occur that causes the PC unit to be locked out on a safety control The control system will auto matically accomplish this function allowing the plenum heater to function even if the PC unit is not operational PC unit must still have power The plenum heater is powered separately from the heat pump Only two sets of two control wires are needed to connect the plenum heater to the control system PC unit Refer to 000145CDG in this manual or on the PC electrical box cover for instructions on how to connect the plenum heater control lines The plenum heater should be mounted in the supply duct in a manner that allows all of the airflow to pass through it to prevent any hot spots in the heater elements TABLE 14 shows the recommended size plenum heater as well as the
95. trol settings DI E Ia E Page 7 Table PC Control System Operation Truth Table Priority Jumper Placed Page 8 Table 4 PC Control System Operation Truth Table Priority Jumper Placed Page 11 Table 5 uod niii sim Editum sueta ea re eee Page 13 Table 6 Control Board Fault Codes eoi rre eei oae EE rue Page 13 Table 7 Pool Circulator Control Wiring Page 14 Table 8 Step by Step Pool Evaporation Rate Calculation Page 16 Table 9 Typical PC unit Sizing Guide 60 2 0 01 0 111 Page 16 Table 10 Typical PC unit Sizing Guide 50 2 00 1111 Page 17 Table 11 Evaporation Rate Chart 50 RH Lbs Hr 2 3113 nnns Page 17 Table 12 Evaporation Rate Chart 60 RH Lbs Hr 2 1 nnns Page 17 Table 13 ACUVIUV Factor ERR SAND E Page 18 Table 14 Plenum Heater SIZING 555 5 445 FECE eR Page 19 Table
96. ue Refer to the APPENDIX B ECM Fan Airflow Tables The air flow can be set to four different levels by changing the position on the Air Flow board located in the electrical box The four levels are indicated in TABLE 5 The actual air flow values can be found in APPENDIX B Units are shipped with the MED position selected for nominal air flow TABLE 5 Airflow Selections Nominal 6 CONTROL TRANSFORMER The low voltage controls are powered by 5VA class Il transformer The transformer has resettable breaker on the secondary side for circuit protection Should the breaker trip locate and correct the problem and then reset the breaker by pressing in on it SAFETY CONTROLS The heat pump has two built in safety controls which are designed to protect the unit from situations which could damage it should the operation of the refrigeration circuit fall outside the allowable operating range A Low Pressure Control The low pressure control monitors the compressor suction pressure and will shut the compressor down if the refrigerant evaporating pressure becomes too low to prevent icing up the evaporator air coil There are some key reasons why this control would activate in response to the operating conditions of the unit 1 Low or no airflow flow 2 Low entering air temperature 3 Dirty air coil due to poor filter maintenance B High Pressure Control The high pressure safety control monitors the compressor d
97. unit has been opened in the field and incorrectly charged 001427MAN 01 Adjust the by pass setup to obtain a discharge pressure of 350 400PSIG as per 000145CDG 03 Check for any restrictions in the lines Disconnect the water lines and check the inside of the pipes for scale deposits High sub cooling low delta T across water coil Page 32 Determine the cause of the flow restriction and correct it Have a qualified service technician backflush the coaxial exchanger Remove 1 2lb of refrigerant at a time and verify that the discharge pressure reduces ISSUE 03 17 NOV 2014 OPERATION TROUBLESHOOTING POOL WATER HEAT MODE continued Possible Cause Recommended Action High Suction Pressure may appear to not be pumping Low Suction Pressure Compressor frosting up TXV frosting up Random Low Pressure trip does not occur while there TXV adjusted too far open TXV stuck open Leaking check valve be tween air condenser and receiver inlet Verify superheat should be be tween 8 12 F 3 6 Superheat will be low if TXV is open too far Adjusting the TXV does not affect the superheat or the suction pres sure Low super heat and dis charge pressure Check valve is cold to the touch and does not warm up Adjust TXV to obtain 8 12 F 3 6 C superheat Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not w
98. w pressure fault orc lockout occurs the status LED wil blink twice If a flow swith fault occurs the status LED wil blink three times Dimensions 1 gs M B A ed 6 a g beaeeen 3 5 1250 4 Cni 8 Rm ei pon en 010 zm t ei s zr px gi bad ia Specifications Voltage 18 to 30 VAC Frequency 50 to 60 Hz Output Solid state Triac Rating amp 0 30 Fault Relay SPDT Rating 1 amp 0 30 Time Delay Antl short cycle time S rminutes fixed 2096 5 second test mode Mechanical Board dimensions 3 5 x 3 25 x 1 Mounting Surface mount using 4 6 or screws Wiring Diagram 9 i 5 442 a eu 3 n LJ oy gt 2 o lo io la C suu FAULT A 31000 Nin LPS Low Pressure Switch HPS High Pressure Switch Pra ART Flow Flow Switch ISSUE 03 17 NOV 2014 Page 51 001427MAN 01 APPENDIX ECM Fan Airflow Tables NOMINAL AIRFLOW SETTING MED 6 AIRFLOW SETTING LOW 6 AIRFLOW SETTING LOW Prose Ful 45 127 55 1500
99. warm and reaches the activation point of the Air Cool Aquastatt valves 1 and 2 are activated and cold supply water flows through the water heat exchanger of the PC unit The cold water activates Stage 2 of the Pool Aquastat locking out the Air Re heat mode Thus the PC acts as a water cooled air conditioner and Pool cools the room down to the setpoint of the cooling Pump thermostat NENNEN Chris Codd 25 MAY 09 ris edaes MARITIME GEOTHERMAL Chris Geddes 25 MAY 09 approver gg Name PC Unit LL L Rs ees Water Cooling Connections Initial Release GEDDES GEDDES 25 MAY 09 Size Drawing Number REV SHEET Approved By Date REV IMPL BY APVD BY DATE eee A 001045CDG 01 1 of 1 ISSUE 03 17 NOV 2014 Page 15 001427MAN 01 Sizing Ductwork POOL SURFACE AREA As the square footage of the pool increases the evaporation rate will increase proportionally This is due to the increase in size of the surface water air contact area The depth shape and total volume of the pool do not affect the evaporation rate PC UNIT SIZING The amount of evaporation occurring in a residential pool application of a given size is governed mainly by the temperatures at which the air and water are maintained It is common practice to keep the air temperature 2 F above the pool water temperature The lower

PC Series Manual - Nordic Geothermal Heat Pump

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