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000647MAN-03 - Nordic Geothermal Heat Pump

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2. 24 TROUBLESHOOTING GUIDE 6352955 DEDE SA UE Eva PAGE 25 5 Page 34 Circuit DIagramss Eu INE E URN Page 35 MODEL SPECIFIC INFORMATION Riu Ra EUR NER PINE PAGE 37 Reiriderant Charge oos UM RUIN SUP ES Page 37 Standard _______________ CERES 37 39 44 Electrical Diagrams 293091500 252522545400 0 45 Case 47 APPENDIX Control Board Specifications PAGE 48 WARRANTY INFORMATIONS Ua Et a PAGE 52 000647MAN 03 Page 4 Date 05 DEC 2012 Tables Diagrams and Drawings TABLES Table 1 Control
3. PAGE 15 Gehieral 2 2 Page 15 the Heat PUMDS dt ww Ceww E 004 0 0S Page 15 nnne Page 15 Water Discharge MENOS Lew 15 GROUND LOOP SYSTEM INFORMATION PAGE 18 18 Flushing amp Purging the Ground 18 Adding HE aaa 19 55 19 19 STARTUP PROCEDURES Page 21 MR Page 21 n Page 22 21 25 40 23 GENERAL MAINTENANCE
4. eDejs 09 1 0 80 OVAYZ seues MNW3 05 2012 46 000647 03 CASE DETAILS DHW IN 1 DHW OUT 12 ZONE LOOP OUT 1 FPT ZONE LOOP IN 17 ES 40 38 1 8 3b 1 4 33 REMOVE THIS FIRST REMOVE THIS DOOR SECOND Right View Date 05 DEC 2012 Page 47 000647MAN 03 APPENDIX A Control Board Specifications Lockout Protection Module Anti short cycle lockout control Pressure flow switch monitoring Alarm output during lockout 5 minute anti short cycle delay 5 second test mode LED fault codes for lockout status Test mode for reduced test time Conformally coated for moisture protection Mode of Operation Specifications The control will begin the 5 rninute time delay upon a Input call from the thermosat After the time delay expires the Voltage 18 to compressor contactor will be energized as long as the high Frequency 50 to 60 Hz and low switches are closed If either switch is open after the delay expires the compressor will not energize if Output either switch opens while the compressor is energized it will ce irmmeciately and begin the anti short cycle delay Type Solid state Triac Ihe compressor will no
5. xog 251432913 Date 05 DEC 2012 Single Unit Connection to Domestic Hot Water Pre Heat Tank Brass Top Port Configuration Domestic COLD from well HEAT PUMP CONNECTIONS 1 2 Union mE DHW OUT 1 2 MT 1 2 1 2 Ball Check Boiler Valve Valve Drain NOTE to the heat pump labels for connection locations 1 2 COPPER LINES Insulate with 5 8 pipe insulation OPTIONAL must install both DHW IN 1 2 FPT HEAT PUMP CONNECTIONS 1 2 Union m 1 gt 12 1 2 Boiler Valve Valve Drain 1 2 COPPER LINES Insulate with 5 8 pipe insulation Ball Valve OPTIONAL must install both 125pisg 1 2 Valve DHW OUT 1 2 1 2 MET NOTE Refer to the heat pump labels for connection locations Domestic COLD from well DHW 1 2 FPT 000647MAN 03 ___ ___ ___ Chris Geddes 10 MAR 09 Chris Geddes 10 MAR 09 ___ Approved ENG Date ML sss Approved By MFG Date Initial Release GEDDES C GEDDES 10 MAR 09 Sz REV Eco IMPLBY APVD BY DATE 9949 ___ Ball Valve 125psig _ Pressure Relief Valve Insulated Domestic Water Pre Heat Tank Pressure Relief alve Insulated Domestic Hot Water Pre Heat Tank
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7. Green Yellow e Outdoor Loop Connections for the ground loop exchanger or ground water system e Zone Loop Connections for building heating cooling loop The Zone Circulator provides flow for this loop e Indoor Loop Weater loop between the condenser evaporator and buffer tank DHW Loop Connections for the Domestic Hot Water INTERNAL HYDRONIC COMPONENTS The EMW Series unit has virtually everything typically re quired for a hydronic installation built into it including the follow ing 50 USGAL 189L buffer tank with electric backup Pre charged expansion tank 125PSIG pressure relief valve Zone Circulator B amp G NRF 36 with isolation valves Pressure gauges Shutoff valves and boiler drains for purging Aquastat s Refer to Diagram B for the locations of the components The pump curve for the Zone Circulator is shown in Diagram A DIAGRAM A B amp G NRF 36 Pump Curve amp NRF 36 Speed 1 NRF 36 Speed 2 NRF 36 Speed 3 000647MAN 03 Page 8 ELECTRIC HEAT The buffer tank contains electric elements for the purpose of auxiliary backup heat The control for the electric heat comes from the Heating Aquastat Stage 2 signal The signal passes through a 0 2H timer before reaching the electric heat contactor coil The timer is set to 1H one hour at the factory The unit is shipped with the electric heat breaker in the off position IT IS VERY IMPORTANT TH
8. MARITIME GEOTHERMAL Installation and Service Manual EMW Series Two Stage R410a Model Sizes 45 80 Energy Module Hydronic Geothermal Heat Pumps Maritime Geothermal Ltd Email info nordicghp com P O Box 2555 Web www nordicghp com Petitcodiac N B 42 6 4 Document Number 000647MAN 03 Ph 506 756 8135 REVISION DATE 05 DEC 2012 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 MODEL NOMENCLATURE EMW 65 HACW P 1 T CC 12K xx Series _____ m Revision EMW Energy Module 01 02 etc Liquid to water Hydronic Elect
9. MARITIME GEOTHERMAL mn 222 Chris Geddes Drawina N swing Name Chris Geddes Approved By MFG Date GEDDES GEDDES 04 FEB 8 EV ECO IMPL BY APVD BY DATE A Date 05 DEC 2012 Page 17 000647MAN 03 Ground Loop System Information Once the ground loop has been pressure tested and the header pipes have been connected to the circulator pump module the heat pump can be connected to the circulator pump module CIRCULATOR PUMP MODULE Maritime Geothermal Ltd has compact pump modules with built in three way valves to facilitate filling and purging the ground loop Refer to drawing 000906CDG at the end of this section Alternatively Grundfoss Model UPS 26 99 or Taco Model 0011 pumps or other brands with similar pumping capability may be used The single pump module will typically handle systems up to 3 tons model sizes 25 35 and 45 the two pump module will typically handle 4 to 6 ton systems model sizes 55 65 75 80 This is based on a typical parallel system with one circuit per ton Maritime Geothermal recommends calculating the total pressure drop of the ground loop including headers indoor piping and heat pump exchanger drop based on the antifreeze type and concentration at the desired minimum loop temperature A pump module that can deliver the flow required for the unit at the calculated total pressure drop should be selected Refer to the Model Specific Information sec
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11. 1 D N no 1 co N OJN 59 59 9 Heating Nominal 3 ton E 22 sei 2 8 32 6 42 3 31 051 2 469 10 9 2 561 53 2 Watts Amps Watts BENI pa Watts EIN 2 438 10 4 2 53 25 83 2463 10 9 2 555 18 22 47 8 28 316 2 466 10 9 2 558 33 58 6 3 766 2 504 11 1 2 596 4 79 EMW 45 HACW P 1T USGPM BTU Hr E 3 6 0 4 0 2 4 4 2 4 8 5 7 6 2 4 6 8 8 7 4 2 Watts Compressor ZPS30K4E PFV Watts EER 40 0 104 0 40 0 45 6 0 606 43 1 104 0 114 9 6 109 9 40 0 45 6 0 606 43 3 104 0 40 0 45 6 0 606 43 6 104 0 115 96 1111 2 40 0 461 0 606 44 0 104 0 40 0 104 0 115 9 6 112 3 40 0 461 0 606 44 6 104 0 45 0 114 114 115 46 1 116 46 7 0 606 9 6 9 6 9 6 0 606 9 6 0 606 410 60 Hz 5 L s cal 42 9 109 5 110 5 111 7 44 3 112 8 44 9 5 2 2 9 5 5 3 1 5 9 3 3 6 5 3 6 7 2 4 0 7 1 4 3 8 3 4 6 8 8 4 9 Watts 24 899 7 295 26 617 7 799 28 495 8 349 31 280 9 165 34 320 10 056 36 864 10 801 39 609 11 605 42 443 12 436
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14. BTU Hr CO O 2 4 2 6 N 2 8 4 3 1 CO Co 3 6 C CO 3 9 4 2 L s 0 606 0 606 0 606 0 606 0 606 0 606 0 606 0 606 Date 05 DEC 2012 Watts _ 03 76 C C 7 6 7 8 4 2 1 433 COPc 25 5 48 8 9 46 1 7 5 35 894 1 453 5 9 1 555 23 1 53 46 2 7 4 35 271 1 575 6 4 1 677 21 0 58 779 14 4 46 5 7 1 34 076 1 650 6 9 1 753 19 4 63 46 7 6 9 32 872 1 721 7 3 1 826 18 0 69 46 9 67 32 314 1 843 7 9 1 948 16 6 20 6 74 47 0 6 6 31 725 1 971 8 4 2 075 15 3 79 es a sme 26 1 471 6 5 31 104 2104 90 2 208 141 84 36 oma Compressor ZPS30K4E PFV Page 39 28 9 Watts 41 036 12 023 40 852 11 969 40 645 11 909 39 707 11 634 38 745 11 352 38 605 11 311 38 451 11 266 38 284 11 217 000647MAN 03 CAPACITY HATINGS continued Heating Mode EMW 55 HACW P 1T EXE EGRE Consumption USGPM BIU Hr Watts WW 2 USGPM BTU Hr Watts 25 0 3 379 104 0 117 12 0 109 5 33 085 9 400 472 0757 43 1 9 694 31 0 20 3 430 104 0 118 12 0 110 0 35 860 6 7 400 478 0 757 433 10 507 9 0 1 tO
15. Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Replace filter drier Remove 1 2lb of refrigerant at a time and verify that the discharge pressure reduces Determine the cause of the flow restriction and correct it Verify pumps are working and sized correctly for ground loop systems Verify well pump and water valve is working for ground water sys tems Increase the size of the ground loop Dirty or fouled coaxial heat exchanger typically for ground water unlikely for ground loop Disconnect the water lines and check the inside of the pipes for scale deposits Have a qualified service techni cian backflush the coaxial ex changer Indoor Loop entering liq uid temperature too cold TXV stuck almost closed or partially blocked by for eign object Low refrigerant charge Faulty compressor not pumping Measure temperature Should be above 60 F 15 Adjusting the TXV does not affect the superheat or the suction pres sure T XV may be frosting up Entering liquid temperature flow and entering air temperature are good but suction is low Check stat ic refrigeration pressure of the unit for a very low value Pressures change only slightly from static values when compressor is started Page 28 Restrict Indoor liquid flow tempo rarily until buffer tank comes up to temperature Adjust the TXV all the way in and out a few
16. Drawing Name Page 12 GEOTHERMAL Ball Valve Domestic HOT OUT to house or mixing valve 125psig Pressure Relief Valve 120 140 50 60 Electric Or Gas Insulated Domestic Hot Water Tank Domestic HOT OUT to house or mixing valve 125psig Pressure Relief Valve 120 140 50 60 Electric or Gas Insulated Domestic Hot Water Tank 170 Plantation Rd Petitcodiac NB E4Z 6H4 Single Unit Connection to DHW Pre Heat Tank Brass FPT Size Drawing Number REV SHEET Date 05 DEC 2012 Sizing Hydronic Information HEAT PUMP SIZING TABLE 5 depicts a rough guideline as to the size of home each heat pump size can handle for ground loop installations TABLE 5 Heat Pump Size vs Heated Area for a Ground Loop System TABLE 6 depicts a rough guideline as to the size of home each heat pump size can handle for ground water installations TABLE 6 Heat Pump Size vs Heated Area for a Ground Water System THE TABLES ABOVE ARE FOR INFORMATION ONLY THEY SHOULD NOT BE USED TO SELECT A UNIT SIZE They simply show on average what size unit is required for a typical two level home main level and below grade basement with R 20 walls R 40 ceiling and average size and number of windows The Heated Area is the area of the main level The tables account for a basement the same size as the heated ar ea MARITME
17. Possible Cause Verificaon HecommendedAction _ Aquastat set too high Verify aquastat setting High Discharge Pressure Low Suction Pressure 000647MAN 03 Low or no flow in heat ex changer to buffer tank circuit Check that isolation flanges and any ball valves are open Verify 115VAC to pump Check gauges for pressure drop Lower aquastat setting to recom mended value 115 F 46 Ensure flow path is unrestricted Replace pump if faulty T XV closed too far 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 Low or no Outdoor liquid flow Entering liquid tempera ture too cold Verify superheat It should be be tween 8 12 3 6 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 there is a temperature difference then it is plugged Also causes low suction pressure High sub cooling low delta T across air coil Delta T across the Outdoor Loop ports should be between 5 7 F 3 4 or compare pressure drop to the tables for the unit Measure the entering liquid temper ature Most likely caused by under sized ground loop Adjust T XV to obtain 8 12 F 3 67 superheat
18. 20 ft from the surface it may be necessary to place a well cap on the well to keep the return water from flowing out the top of the well This cap is commonly required since a certain amount of pressure is needed to force the return water back down the well if the static level is high Water discharged by percolation will generally soak into the ground within a distance of 50 to 100 ft If suitable care is taken to ensure that the drain pipe runs downhill and the end of the pipe is protected by a bale of hay or spruce bows etc the end of the pipe will not freeze as the pipe will empty out when the heat pump shuts off and the water valve closes When snow comes it will usually cover the entire process much like a small spring It is recommended that the pipe be below the frost line when possible for maximum freeze protec tion When discharging into a river or stream or above the surface of a pond the same guidelines should be followed as described in the paragraph above for the percolation method When discharging the waste water below the surface of a pond the discharge pipe should be placed below the frost line to prevent the pipe from freezing As opposed to the percola tion method water will remain in the end of the pipe It is rec ommended that the surface of the pond be lower than the instal lation location of the heat pump where practical This reduces the back pressure generated by the weight of the water in the pond Typ
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20. DIAGRAM B Circulator and Major Component Locations DHW Circulator Zone Boiler Drain Expansion Tank Pressure Relief Valve Indoor Circulator Outdoor Heat Exchanger TESSI Compressor Reversing Valve ER E TXV Date 05 DEC 2012 Zone Circulator Hot Tank Probe Safety Pressure Switch for Electric Backup Indoor Boiler Drain Buffer Tank Indoor Heat Exchanger Filter drier Tank Boiler Drain 000647MAN 03 Voltage External Electrical Box C gt 24VAC 24VAC Class 2 ow Transformer NOTES 1 Verify the line voltage is correct for the primary of the transformer 2 Ensure that the transformer is sized to handle the load with all zones calling for heat THERMOSTAT FOR FAN COIL Common Internal Transformer R 24VAC Internal Transformer W Zone Valve G Fan Signal connect to G1 Fan Speed 1 G2 Fan Speed 2 if equipped G3 Fan Speed 3 if equipped Select one fan speed NOTES 1 The zone circulator is located inside the EM unit 2 A connection between R and T energizes the zone circulator 3 pipe coils are recommended for fan coil zones 4 Zone N indicates the last zone of the zone type Heat Pump Signals C Common Internal Transformer R 24VAC Internal Transformer T Heating Zone Circulator Heat Pump Electrical Box CRT
21. GEOTHERMAL LTD HIGHLY RECOMMENDS THAT A PROPER HEAT LOSS GAN ANALYSIS BE PER FORMEDE BY A PROFESSIONAL INSTALLER WITH CSA APPROVED SOFTWARE BEFORE SELECTING THE SIZE OF UNIT REQUIRED FOR THE APPLICATION For heating dominant areas we recommend sizing the unit to 10096 of the heating design load for maximum long term efficiency with minimal supplementary heat The unit should be in stalled as per CSA 448 2 02 For ground loop applications the ground exchanger should be designed using suitable software with a multi year analysis There are many factors to consider when sizing the heat pump Some of these factors include the number of levels the size of the windows the orientation of the home attached gar age bonus rooms walk in basement coldest outdoor tempera ture etc The heat loss program will take all of these factors into consideration in its calculations An undersized installation will require not be as efficient and will required expensive auxil iary heat to maintain a comfortable temperature in the home and the cost savings of having a geothermal heat pump are greatly reduced Date 05 DEC 2012 Page 13 Once the total heat loss has been calculated the unit can be sized using the performance tables from the specifications document in conjunction with the minimum expected entering liquid temperature of the ground loop well water temperature for ground water system The heat pump output must be able to match the tot
22. HE Dm 5025 wet m col s BIT cr En d re CE sc NE n 9 4 M va T fh ES i e i r ds i um ai ua C LG FLOW Contactor 3000 00 LR Flow Flow Switch 000647 03 48 Date 05 DEC 2012 THIS PAGE INTENTIONALLY LEFT BLANK Date 05 DEC 2012 Page 49 000647MAN 03 THIS PAGE INTENTIONALLY LEFT BLANK 000647MAN 03 Page 50 Date 05 DEC 2012 THIS PAGE INTENTIONALLY LEFT BLANK Date 05 DEC 2012 Page 51 000647MAN 03 LIMITED EXPRESS WARRANTY er is expressly understood that unless a statement is specifically identified as a warranty statements made by Maritime Geothermal Ltd registered New Brunswick Canada or 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 FORTH 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 PURP
23. O 25 r lv lt 20 lt 000647 03 20 Startup Procedure The following steps describe how to perform the startup procedure of the geothermal heat pump The EMW Series Two Stage R410a Startup Record located in this manual is used in conjunction with this startup procedure to provide a detailed 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 Indoor and Zone Loops Hydronic 1 Verify that all shutoff valves inside the unit are fully open 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the loop contains the proper mix of antifreeze if used for the intended application If applicable record the type of antifreeze and the mixture value on the startup sheet circle Vol or Weight 4 Record the static loop pressure on the startup sheet The value must be above 12PSIG The electric heat will not function if the pressure is below this value Outdoor Loop Ground Loop 1 Verify that all sh
24. Signal Description 11 1122 Page 6 Table 2 Typical Aquastat Settings 11518 Page 7 Table 3 Control Board Fault Codes d Page 7 2 mmm 8 Table 5 Heat Pump Size vs Heated Area for Ground Loop Systems Page 13 Table 6 Heat Pump Size vs Heated Area for Ground Water Systems Page 13 Table 7 Required Flow and Air Bladder Tank 0 0 11111 Page 15 Table 8 Antifreeze Percentages by Volume Page 19 Table 9 Volume of Fluid 100ft Of Pipe 0 151 11 11 Page 19 Table 10 Refrigerant Charge Chart 221 onse Ease se Page 37 Table 11 Shipping Infor MANOA Page 37 Table 12 Standard Capacity Ratings Ground Loop Heating 60Hz Page 37 Table 13 Standard Capacity Ratings Ground Water Heating 60HZ Page 37 Table 14 Standard Capacity Ratings Ground Loop Cooling 60Hz Page 38 Table 15 Standard Capacity Ratings Gro
25. an on board LED and a FAULT pin with a 24VAC output An external indicator or relay can be connected across the FAULT pin and ground if external signal ing 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 3 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 3 Control Board Fault Codes Laut 60 High Pressure Low Pressure Flow 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 WARNING REPEATED RESETS OF A LOW PRES SURE LOCKOUT COULD CAUSE THE HEAT EX CHANGER TO FREEZE AND RUPTURE DESTROYING THE HEAT PUMP AND VOIDING THE WARRANTY 000647MAN 03 INDICATOR LIGHTS The EMW Series unit has three indicator lights on the side of the electrical box They are described in TABLE 4 TABLE 4 Indicator Lights Compressor ON Electric Elements ON LOOP TERMINOLOGY The following terms are used to describe the various loops of the EMW heat pump system Colour
26. are minimum water requirements based on an entering water temperature of 46 F Based on two minute well pump run time Use next size larger tank if there is not a match for the value indicated PLUMBING THE HEAT PUMP Plumbing lines both supply and discharge must be of adequate size to handle the water flow necessary for the heat pump A 1 copper or plastic line should be run to the Outdoor IN Supply IN pipe of the heat pump Similarly a 1 line should be run from the Outdoor OUT Supply Out pipe to the method of disposal P T plugs should be installed at each port See Diagram C in the Ground Loop section for a description of P T plugs The water valve should be installed in the discharge line Refer to drawing 000907CDG at the end of this section for the recommended setup Placing the water valve in the dis charge line ensures that the heat exchanger inside the heat pump remains full of water when the unit is not running Unions or some other form of disconnect should be used so that the coaxial heat exchanger may be accessed should it required cleaning The heat pump has an electrical connector for the water valve just inside the case After the water valve is installed run the valve harness into the case through the hole provided move the jumper plug from the Valve Connector and connect the harness in its place Ideally there will be water flow available in excess of the requirement of the heat pump In such a sit
27. d Ti Element nrl move the Mod Indicator 115VAC Zone Zone Circulator to the 240 L 1 Amber Circulator Pump Pump Relay terminal of the Electric Heat transformer WELL Slow WELL LOOP NOTE In case of to the 208 Contactor short or overload 2 2 Close Valve Solenoid Valve Valve rectify the problem and e e lt press black button on lt 9 2 transformer to reset 2 e d 20 breaker zl 3 3 e 4 ES JEL e 0 se 1 5 5 T H 6 6 6 co ilo 100VA 4 Control CATATAN Transformer White Black Stripe Required Connections _____ 24 HEATING COOLING e High Pres 20 Control LP1LP2 Y FLOW HP1HP2 410 565psig 2 24V 2 Board as Irculator pec R410a 75psig STATUS Cooli 1 0 ooling O E 2 ET C F R CC Low e 52 51 52 A 5 3 Flow Compressor STAGE 2 STAGE 1 STAGE 2 Contactor Low Pres 4 N Low Pres 1 White TROUBLE Indicator Indicator Red Green Electric Heat Timer on make A dry contact closure between R and Z activates the zone circulator pump Yellow black stripe wire not placed
28. not flammable In situations where alcohols are not allowed as a loop fluid due to local regulations then propylene glycol is a non toxic alternative which can be substituted Propylene glycol should only be used in cases where alcohols are not permitted since the heat transfer characteristics are less desirable and it becomes more viscous at low temperatures increasing pumping power The volume of fluid that your loop system holds can be closely estimated by totaling the number of ft of each size pipe in the system and referencing TABLE 9 the for approximate volume per 100 ft When the volume of the loop has been calculated and the appropriate amount of antifreeze is ready for addition by referencing TABLE 8 drain the equivalent amount of water from the flush cart or mixing barrel and replace it with the antifreeze Date 05 DEC 2012 Page When using alcohols be sure to inject below the water line to reduce initial volatility of the pure antifreeze If the loop is large it may be necessary to refill the tank with antifreeze several times to get all the antifreeze into the loop Pump the loop for 5 to 10 minutes longer to ensure the remaining fluid has been well mixed TABLE 9 Volume of fluid per 100 ft of pipe 1 1 4 Type of Pipe Copper 5 3 6 4 1 1 2 Rubber Hose 3 4 IPS SDR11 1 IPS SDR11 1 1 4 IPS SDR11 6 7 3 30 3 1 1 2 IPS SDR11 9 1 41 3 2 IPSSDR11 15 0 68 1 Heat Exchanger Averag
29. times to loosen it Replace 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 Replace compressor Date 05 DEC 2012 OPERATION TROUBLESHOOTING HEATING MODE Fault Possible Cause High Suction Leaking reversing valve Pressure may appear to not be pumping Verification Recommended Action Reversing valve is the same tempera ture on both ends of body common suction line is warm compressor is running hot Replace reversing valve TXV adjusted too far open Adjust TXV to obtain 8 12 F 3 6 C superheat 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 pressure Low super heat and discharge pres sure Compressor See Low Suction frosting up Pressure in this section frosting TXV stuck almost closed Adjust the TXV all the way in and out a few times to loosen it Re place TXV if this does not work TXV stuck open Adjusting the TXV does not affect the Adjust the TXV all the way in and Random high pressure trip does not occur while on site Heating instead of cooling High Discharge pressure Date 05 DEC 2012 or partially blocked by for eign object Faulty compressor contac Intermittent Indoor Loop Circulator heat exchanger to buffer tank superheat
30. water through the lines by interchanging the flush cart lines and purge again You will be able to visibly tell when all air is removed ADDING ANTIFREEZE SOLUTION In most mid and northern areas of the US and in all of Canada it is necessary to condition the loop fluid by the addition of some type of antifreeze solution so that it will not freeze during operation in the winter months This antifreeze is required because the loop fluid will normally reach a low entering temperature of 28 F to 32 2 to 0 and refrigerant temperatures inside the heat pump s heat exchanger may be as low as 20 11 cooler See TABLE 8 for details of freeze protection provided by different concentrations Propylene Glycol 3896 30 22 15 BY WEIGHT Protection to 10 F 15 6 3 12 9 Methanol 16 8 13 6 10 Propylene Glycol 30 23 596 18 396 NOTE Add enough antifreeze to allow for a temperature 20 F lower than the expected lowest loop fluid temperature entering the heat pump Although many different antifreeze solutions have been employed in geothermal systems the alcohols such as methanol or ethanol have the most desirable characteristics for groundloop applications The overall heat transfer characteristics of these fluids remain high although care must be taken when handling pure alcohols since they are extremely flammable Once mixed in a typical 2596 by volume ratio with water the solution is
31. 2 7 4 2 425 10 9 2 557 17 3 67 90 120 762 9 2 52397 0 757 79 41 12927 5 06 194 322 0 757 246 5 1 15 352 46 9 7 2 43 075 2 574 11 6 2 706 15 9 72 95 120 811 91 51 861 12 3 14 8 13 0 13 4 66 22 2 350 0 757 273 5 1 15 195 12379 433 25 0 378 0 757 300 5 0 15 108 82 105 120 910 90 5132 0 757 82 3 8 1 4 02 278 406 0 757 328 5 0 15 037 000647MAN 03 Page 40 Date 05 DEC 2012 CAPACITY RATINGS continued EMW 65 HACW P 1T F l USGPM Watts Los 57 090 30 25 8957 3 4 EMW 65 HACW P 1T 5 6 38 187 BTU Hr Heatinq Mode Nominal 5 ton e e 4 187 Co gt gt a N P N 4 288 4 377 4 383 4 443 CO iN O E 1 Watts 4 359 4 375 N 4 439 4 476 4 548 4 554 4 614 4 621 gt e Compressor ZPS51K4E PFV EER E DA 8 E E USGPM L s 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 USGPM BTU Hr C C Watts 14 4 109 8 5 8 41 854 0 908
32. 25 75 Heat Pumps Brass FPT Page 16 000619INF Ground Water Disposal Methods 10 021022 2 Page 17 000906CDG Geo Flo Circulator Pump Module Installation Brass FPT Page 20 001047RCD EMW HAC Series Refrigeration Circuit Diagram Heating Mode Page 36 001048RCD Series Refrigeration Circuit Diagram Cooling Mode Page 37 000448SCH EMW HAC 1T Schematic Diagram Page 48 000449ELB EMW HAC 1T Electrical Box Diagram Page 49 Date 05 DEC 2012 Page 5 000647MAN 03 Installation Information UNIT DESCRIPTION The EMW Series unit is a high efficiency R410a refrigerant two stage geothermal heat pump with built in buffer tank zone circulator expansion tank valves and gauges and controls is a compact stand alone modular system that greatly reduces installation time and space 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 an
33. 4 40 STAGE 2 ELT 322 0 Liquid Flow Outdoor IGPM USGPM Lis Watts BrU tr B Stagei 1 865 20 000 59 _ 2 580 27 000 Stage 1 3 370 37 600 11 0 3 27 15 NaCl by Weight Ground Loop Fluid N 3 07 3 18 Table 13 Standard Capacity Ratings Ground Water Heating 60 2 EWT 104 F 40 ELT 50 F 10 Liquid Flow Outdoor Input 8 BTU H 2 560 35 300 2 615 34 300 101 384 3 660 47 400 139 379 75 80 Stage 1 3 390 42 900 12 6 3 71 Stage 2 4 545 58 800 17 2 3 79 3 860 52 200 153 396 n 229 407 Date 05 DEC 2012 Page 37 000647MAN 03 Table 14 Standard Capacity Ratings Ground Loop Cooling 60Hz n STAGE 1 ELT 68 F 20 C EWT 53 6 F 12 STAGE 2 ELT 77 25 Liquid Flow Outdoor Bum 26 Stage2 3 345 151 Stage 1 2 605 48 200 14 0 Gee m m 3 xS Stage 4305 67 100 197 15 NaCl by Weight Ground Loop Fluid Table 15 Standard Capacity Ratings Ground Water Cooling 60 2 EWT 53 6 12 ELT 59 F 15 Liquid Flow Outdoor 000647MAN 03 Page 38 Date 05 DEC 2012 CAPACITY HATINGS Mode EMW 45 HACW P 1T Co gp tO Cn S x
34. 43 2 3 2 12 263 144 1103 6 3 45 103 7485 35 i3215 37 14223 11147 74 58064 41 15548 11271 87 61458 156 56 21230 410 60 Hz BIU Hr C C L s Watts COPc 7 5 17 202 687 14 214 45 6 57 685 57 75 5 E 536 3 12 0 2 536 3 12 0 2 53 6 36 2 12 0 2 53 6 3 12 0 2 53 6 3 3 3 3 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 14 4 0 908 56 8 13 8 61 7 16 5 66 7 19 3 71 5 21 9 77 2 25 1 82 1 27 9 87 1 30 6 66 825 t999 66 638 19 529 66 290 19 423 64 727 18 965 63 021 18 465 62 474 18 305 62 208 18 227 Q T USGPM F L s C Watts 45 3 59 576 4 I 45 9 55 645 62 80 7 7 16300 574 167 267 46 2 53 481 68 85 46 3 52 252 73 90 0 N i e 53 6 120 53 6 12 0 3 53 6 gt 6 6 7 7 7 7 468 7 51 29 78 95 46 6 50 250 83 100 144 92 1 61 910 12 0 3 8 1 14 723 408 28 3 378 0 908 33 4 18 139 Date 05 DEC 2012 Page 41 000647MAN 03 N 8 2 3 6 7 8 0 2 CAPACITY RATINGS continued Heating Mode EMW 75 HACW P 1T Nominal 6 ton Power Consumption R410a 60 Hz F F USGPM 25 BTU Hr Watts Amps Watts 2
35. 5 25 5 _ mim d m M Compressor ZPS60K4E PFV Watts 49 160 14 404 53 064 15 548 57 406 16 820 62 270 18 245 67 336 19 729 72 824 21 337 78 745 23 072 84 839 24 858 EMW 75 HACW P 1T R410a 60 Hz F USGPM BTU Hr Watts USGPM BTU Hr C 36 2 4 37 29 37 2 6 37 2 7 37 2 8 37 2 9 37 3 0 38 3 1 Onm 000647MAN 03 L s 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 C C 45 5 8 1 45 8 7 8 65 298 3 022 13 8 3 254 20 1 Watts COPc C 49 59 15 0 461 75 62 772 3 160 14 6 3 393 18 5 64 46 4 7 2 60 359 3 294 15 5 3 535 17 1 69 20 6 46 6 7 0 59 076 3 494 16 4 3 735 15 8 74 46 7 6 9 57 621 3 701 17 3 3 942 14 6 79 26 1 46 9 6 7 56 226 3 915 18 3 4 156 13 5 84 83 37 16 474 Compressor ZPS60K4E PFV 28 9 co I L s 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 Watts 76 828 22 510 76 241 22 338 75 610 22 154 73 557 21 552 71 602 20 979 71 002 20 803 70 252 20 584 69 589 20 389 05 2012 CAPACITY RATINGS continued Heating Mode EMW 80 HACW P 1S Nominal 6 ton Power Consumpti
36. 9 Heat Pump Electrical Information 380 3 50 Internal Circulators Compressor FLA Electric Outdoor Elements Circulators Max Fuse 5 80 80 Single Stage unit 000647MAN 03 L Amps A Amps 46 Lm f os s 46 ose es 50 631 Page 44 Date 05 DEC 2012 ELECTRICAL DIAGRAMS 230 17 60 continued EMW Series Schematic Diagram 208 230 1 60 Single Two Stage Scroll Reversing Outdoor Loop Pumps SN Gnd 115 230v a 208 230VAC sjelele CIE CY Compressor Run 115VAC 115 L 8 2 T Potential Relay a gt 1 epar 115VAC Indoor We circulator Pump NOTE Connect the brown wire with the insulated terminal to the bottom left terminal of the compressor BREAKER Compressor contactor T1 marked A once lines are filled and purged The E Contactor DHW ON OFF SWITCH can be used to enable disable the pump CD ola Storage Tank L 3 Heater TS re b Start Cap 115VAC DHW Circulator P 1 Black u White Neutral
37. 98 20 9 3 994 17 3 19 8 3 92 18 8 66 18 9 71 42 6 8 0 67 482 4053 22 0 4 249 15 9 76 24 4 42 8 7 8 65 688 4 326 23 3 4 522 14 5 81 Compressor ZP70KWE PFV Page 43 27 2 L s 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 16 8 1 060 C 55 5 13 1 60 5 15 8 65 4 18 6 70 4 21 3 76 4 24 7 81 3 27 4 86 2 30 1 91 1 32 8 C 10 5 5 8 10 5 5 8 10 4 5 8 10 4 5 8 10 4 5 8 10 3 10 2 S 10 1 5 6 Watts 83 982 24 607 83 660 24 512 83 219 24 383 83 054 24 334 82 814 24 264 82 105 24 057 81 315 23 825 80 451 23 572 000647MAN 03 ELECTRICAL TABLES Table 16 Heat Pump Electrical Information 230 1 60 LRLA Amps Amps 18 6 23 6 65 28 6 118 82 96 Internal Electric Outdoor Max Fuse 104 1 75 30 4 15 4 0 80 35 7 148 2 5 48 48 48 ENTE 8 84 9 86 7 92 0 4 5 0 73 9 90 6 799 978 112 9 125 1 3 Single Stage unit Table 17 Heat Pump Electrical Information 208 3 60 Internal Circulators Compressor D r 4 Qo pogga 80 Single Stage unit Electric Elements Max Fuse Table 18 Heat Pump Electrical Information 220 1 50 Internal Circulators Single Stage unit Electric Elements Outdoor Circulators Amps 683 87 2 Max Fuse 87 9 Table 1
38. AT THE INDOOR LOOP IS FLOODED AND PRESSURIZED BEFORE TURNING ON THE ELECTRIC HEAT BREAKER An electric element that is not under water will burn out in a matter of seconds There is a safety pressure switch mounted to the side of the buffer tank the electric heat contactor will not engage unless the pressure in the indoor loop is above 10PSIG Should the heat pump require service the compressor breaker should be turned off This prevents the refrigeration section from operating but allows the electric heat to continue operating ZONE CONNECTIONS The Zone ports are 1 FPT brass fittings refer to CASE DETAILS The zone header pipes can be connected to these ports It is recommended that unions or another type of discon nect be installed to facilitate heat exchanger cleaning should it be required The Zone Circulator is activated by connecting R and Z together via dry contacts PURGING THE INDOOR SYSTEM There are ball valves and boiler drains inside the unit to facilitate filling and purging Once the system has been filled with the desired fluid purging may be done in the following man ner Connect a fill hose to the Zone Boiler Drain Connect a drain hose to the Indoor Boiler Drain Close the right isolation valve of the Zone Circulator Close the right isolation valve of the Indoor Circulator Open the Zone and Indoor Boiler Drains Open the fill hose valve Purge until no air can be heard leaving the drain hose Close th
39. EVED 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 EXCLUSIVE REMEDY OF THE BUYER OR PURCHASER AGAINST MG FOR BREACH OF CONTRACT FOR THE BREACH OF ANY WARRANTY OR FOR MG S NEGLIGENCE OR IN 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 b
40. M 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 10 Refrigerant Charge Chart for the proper charge amount STEP 5 If 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 the unit until it remains under 500 microns for several minutes with the v
41. OSE 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 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 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 10 years from the Warranty Inception Date as defined below 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 Other accessories when purchased separately for 1 year from the date of shipment from MG shipment from MG whichever comes first 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 the part If MG determines the part to be defective and within MG s Limited Express Residential Warranty MG shall when such par
42. Out pipe to allow air to escape from the system before the unit is started This step will make certain that the domestic hot water circulator in the unit is flooded with water when it is started CAUTION the domestic hot water pump is water lubricated damage will occur to the pump if it is run dry for even a short period of time Connect the brown wire with the blue insulated terminal to L1 of the compressor contactor fuse terminal for 575 3 60 units Ensure the power is off when connecting the wire The DHW loop may have to be purged of air several times before good circulation is obtained A temperature difference between the DHW In and DHW Out can be felt by hand when the circulator pump is operating properly For the pre heat tank setup the final tank should be set to 140 F 60 C unless local code requires a higher setting The pre heat tank does not require electric elements This setup takes full advantage of the desuperheater as it is the sole heat provider to the pre heat tank The desuperheater remains active during the compressor runtime until the pre heat tank has been completely heated by the desuperheater alone This setup is more energy efficient than a single tank setup CAUTION If two 2 shut off valves are located on the domestic hot water ines as shown in the diagram a pressure relief valve must be installed to prevent possible damage to the domestic hot water circulator pump should both valves be closed
43. _ 6 Circulator Pump Module Wiring Ground Loop Only Page 6 Control HeaHiremellls es ova aicut cerco qu cde dst cues ep Pl etu Page 6 COntrol _____________ _____ _ _ 7 qve c Page 7 Ero coe M Page 8 Ber Terminology Page 8 Internal Hydronic Components s ii s ER EEREEU Page 8 DET 8 8 the Indoor RN VM USES Page 8 Domestic Hot Water Connections dix ERE SR qu EM ERE Kex EE I FEE ESI RE ange Page 9 SIZING AND HYDRONIC INFORMATION PAGE 13 Heat PUMP SIZIN AE OE EEEE A 13 Hydronic Applications General 2 SEE 13 GROUND WATER SYSTEM INFORMATION
44. actor contactor the heat pump terminal strip but the contactor does not energize Or contactor is energized but 115VAC is not present across the wire on the load terminal and ground Faulty zone circulator 115VAC is present across the wire Close isolation valves and re on the load terminal of the zone move circulator pump head Veri circulator contactor and ground but fy operation of the impeller circulator pump is not working Clean or replace if faulty 000647MAN 03 Page 32 Date 05 DEC 2012 DOMESTIC WATER DHW TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action Insufficient hot Thermostat on hot water Visually inspect the setting Readjust the setting to 120 water tank set too low Should 140 F if required by local code Tank Problem be set at 120 F 140 F if required by local code Breaker tripped or fuse Check both line and load sides of Replace blown fuse or reset blown in electrical supply fuses switch is open determine breaker to hot water tank why Reset button tripped on Check voltage at elements with Push reset button hot water tank multimeter Insufficient hot Circulator pump not Visually inspect the pump to see if Replace if faulty water operating shaft is turning Use an amprobe to Heat Pump measure current draw Problem Blockage or restriction Check water flow and power to Remove obstruction in water the water line or ho
45. acuum 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 000647MAN 03 Page 34 Date 05 DEC 2012 E 5 5 3 QU 5 5 e Q Q 2 S K c Jo 20 994190100 A8 093 JequinN NOMEA 60 zi eseereu 10 nou ee 21 zo 9600 zo seuesS O9VH MIA3 ames _ C G i lt i lt lt JOSS9JQuJ02 gt sseio Ja 1 1 N m nseq s jeuondo VP rcr m YOOdLNO gt 1 DOIAIOS CH gt E doo1 peso 2 Li INOAND eJnssaJ
46. akage e Proper drainage material should be used on the outside of the wall to prevent water buildup e Pump module fittings are available from Maritime Geothermal Ltd Geo Flo Part Numbers are indicated above italics e A pressure gauge is recommended if P T plugs are not installed e The air bladder tank should be pressurized to the desired static pressure of the ground loop before installation e For most applications a 1 pump module will accomodate NORDIC models sizes 25 35 and 45 and a 2 pump module will accomodate sizes 55 65 and 75 The total loop pressure drop including the headers inside piping and heat exchanger drop should be calculated based on the antifreeze mixture and lowest desired entering water temperature The pump module selected must provide the required flow at this calculated pressure drop value CIRCULATOR PUMP MODULE 3 WAY VALVE POSITONS LEFT SIDE VIEW 2 Valve in HP fill purge position 3 Valve in normal running position 1 Valve in Loop fill purge position Ground Loo Ground Loop Ground Loop 170 Plantation Rd Petitcodiac NB EAZ 6H4 awn By te ted By Dale 08 gr og EE Name Geo Flo Circulator Pump Module O O T O 88 05 DEC 08 Installation Brass initial GEDDES C GEDDES 09 DEC 08 Size Drawing Number REV SHEET Vi ate _ o A 000906PDG 01 1 of 1 Date 05 DEC 2012 A I lt m Q
47. al heat loss at the selected entering water tempera ture in order to provide a comfortable environment with minimal auxiliary heat HYDRONIC SYSTEMS GENERAL Hydronic systems typically provide heat through two different types of media e radiant in floor heating e forced air heating via fan coil units One of the benefits of hydronic systems is the flexibility in setting up the heating system Whereas a typical forced air sys tem has one central thermostat controlling the entire heating system the home may be sectioned into several areas called zones with a hydronic system Each zone has its own thermo stat allowing simple separate temperature control of the individ ual areas in the home There are other uses for hydronic systems the two most com mon being on demand domestic hot water and pool spa heat ing Drawing 000530PDG shows the most common types of zones A typical system consists of the heat pump the buffer tank and the zones For the EMW Series the buffer tank is part of the heat pump unit The heat pump s sole purpose is to maintain the buffer tank set point Its operation is independent of the zone operation Fan coils can be used to provide heating and or cooling for areas that do not have radiant in floor heating They provide a means of air heating cooling with minimal or no ductwork Note that the buffer tank temperature should be set for 115 F 46 if there are fan coils in the system Two port fan coil
48. all connections are tight and the ground wire is connected tightly to the ground connector for the heat pump Record the fuse circuit breaker size and wire gauge for the heat pump Verify that the control connections to the are properly connected and all control signals are off Turn both breakers off in the unit electrical box so that the unit will not start when the power is turned on Verify that the circulator pumps are connected to the proper voltage terminals in the heat pump Record the voltages of the circulator pumps Ensure all access panels except the one that provides access to the electrical box are in place Oo 05 2012 21 000647MAN 03 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 2 3 4 Remove the caps from the service ports and connect a refrigeration manifold set to the unit Turn the power on to the heat pump and set all controls including all zone thermostats to OFF Measure the following voltages on the power block and record them on the startup sheet L1 L2 L2 L3 L1 L3 Verify that the green light on the side of the cabinet is on Heating Mode 1 2 3 Turn the compressor breaker on The compressor will start allow 30 60 seconds for the wa
49. ct the harness plug to the Generic 24VAC Solenoid Water Valve Connect the harness plug to the connector inside the heat pump ELECTRICAL CONNECTOR g NOTE Ensure the pin is installed in the proper orientation as shown here when re instaling the head ES NOTE Remove the head from the valve before soldering the valve in place Drawn By Chris Geddes 1 Checked B Chris Geddes 1 Approved By Chris Geddes Approved By ECO IMPL BY APVD BY DATE GEOTHERMAL LI Drawing Name connector inside the heat pump ELECTRICAL CONNECTOR Piping is as shown above X 170 Plantation Rd Petitcodiac NB 242 6H4 Typical Ground Water Installation for Size 25 75 Heat Pumps Brass FPT PN Size Drawing Number REV SHEET 000647MAN 03 Date 05 DEC 2012 GROUND WATER DISPOSAL METHODS Pressure Nordic Pitless Adaptor Water Table Pond Lake minimum 8Oft Stream Submersible Pump Nordic Pitless Adaptor Water Table minimum 8Oft Submersible Pump Pressure Pitless Adaptor Water Table Tile Field minimum 8Oft Submersible Ground Water Disposal Methods Size Drawing Number REV SHEET 3 Sm z CED Mrd ris Geddes ri Petitcodiac NB
50. ction pres sure 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 Indoor Loop circulator heat exchanger to buffer tank 000647MAN 03 Verify wiring is good Correct the wiring or replace the circulator Page 30 Date 05 DEC 2012 ELECTRIC HEAT TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action Tripped or faulty electric Reset if tripped If tripped verify Determine why breaker was heat breaker that there is 230VAC across L1 and Replace breaker if faulty L3 of the electric heat contactor No Electric Heat Insufficient Indoor Loop Verify Indoor loop pressure Must Increase Indoor Loop pressure pressure have at least 12PSIG to engage the safety pressure switch Faulty Timer Check timer setting Adjust to mini Replace timer if faulty Note timer is set to 2 mum value to test timer Verify hours at factory 24VAC across each of the terminals to C on the terminals strip Faulty electric heat Voltage on line side with contactor Replace contactor 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 Faulty aquastat 52 is not showing on the display Replace aquastat when it should be according to the settings and
51. culator pump voltages Outdoor 1 Outdoor 2 Low voltage connections are correct and securely fastened STARTUP DATA Preparation Voltage across L1 and L2 L1 and L3 L2 and L3 Green Light is ON Suction Pressure Discharge Pressure Outdoor In Supply In Outdoor Out Supply Out and Delta n oa F vo Outdoor Flow L s Compressor L1 black wire current A Heating Mode 10 minutes Heating aquastat setpoint and discharge pressure at cycle end Domestic Hot Water functioning Yellow light is ON Electric element L1 current draw Cooling Mode Suction Pressure Discharge Pressure o 10 minutes o o HACW only Outdoor In Supply In Outdoor Out Supply Out and Delta T n ot Cooling aquastat setpoint and suction pressure at cycle end F C psig kPa Final Aquastat Heating S1 Setpoint S1 Delta S2 Setpoint S2 Delta Cooling S1 Setpoint S1 Delta S2 Setpoint S2 Delta Od Startup Personnel Witness Site Signature Signature A In A total of three copies are required one for the site one for the installer startup and one to be sent to Maritime Geothermal Ltd Date 05 DEC 2012 Page 23 000647MAN 03 General Maintenance GENERAL MAINTENANCE SCHEDULE Inspect for pitted or burned points Replace if necessary Clean as per HEAT EXHCANGER FLUSING PROCEDURE below I
52. d a drain pipe to the pump module purge ports and blow the anti freeze solu tion into a clean 5 gallon bucket Connect a purge cart to the pump module purge ports Place 2 gallons of RYDLYME in the purge cart Circulate the fluid through the heat exchanger for at least 2 hours 3 recommended Disconnect the purge cart and dispose of the solution RYDLYME is non toxic and biodegradable and as such can be poured down a drain Clean the purge cart thoroughly Connect fresh water and a drain to the pump module purge ports and flush the exchanger for several minutes STEP 7 Blow the heat exchanger out with compressed air as per STEP 2 and dump the water down a drain Connect the purge cart to the pump module purge ports Re fill and purge the heat exchanger with as per standard procedures the anti freeze from STEP 2 can be re used Disconnect the purge cart and set the pump module valves back to the original positions nol o ol ol o o m m m m m m m 9 9 9 9 9 7 9 gt STEP 10 Operate the system and check for improved performance Depending the plumbing there should be either unions or boiler drains for to access the heat exchanger 000647MAN 03 Page 24 Date 05 DEC 2012 Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump If the problem is with the domestic hot water or the auxilliary backup electric heat proceed to the r
53. d 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 hydronic unit has negligible effects on the operation of the system For ground water systems the unit can be placed near the well water system ground loop system units can be place near where the header pipes enter the struc ture to keep the ground loop piping heat pump and circulator pump module in one location The hydronic layout may make a particular location ideal for the unit installation If possible the access panels should remain clear of obstruction for a distance of two feet to facilitate servicing and general maintenance 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 Styrofoam covered with 1 4 plywood The Styrofoam will smooth out any irregularities in the cement floor while the plywood will distribute the weight of the unit evenly over the Styrofoam This process will also deaden the compressor noise emitted from the bottom of the cabinet ELECTRICAL CONNECTIONS The heat pump has a concentric 1 093 0 875 knockout for power supply connection to the electrical box There are also two other 0 875 k
54. d to in crease the heating setpoints by 10 F 6 C in order to obtain the required heating capacity CONTROL TRANSFORMER The low voltage controls for 208 230 1 60 and 208 3 60 models are powered by a 100 class 11 transformer The transformer has a 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 NOTE For 208 230VAC 1 60 units if connecting to 208 power supply move the red wire connected to the 240 terminal of the transformer to the 208 terminal of the transformer The low voltage controls for 220 1 50 and 380 3 50 mod els are powered by a 100 class II transformer with primary and secondary fuses Should a fuse blow locate and correct the problem then replace the fuse 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 risking the danger of freezing conditions in the evaporator Date 05 DEC 2012 Page 7 There are 3 main reasons why this control would activate in response to the operating conditions of the unit while operat ing
55. e 12 15 5 7 INITIAL PRESSURIZATION At this point open all valves in the flow circuit and slowly close off the supply and return flush cart valves in a manner that leaves about 20 30 psig on the system If an air bladder expansion tank is used it should be charged to the above pressure before actual water pressure is put on the system Systems without an expansion tank will experience greater fluctuations in pressure between the heating and cooling seasons causing pressure gauges to have different values as the loop temperature changes This fluctuation is normal since expansion and contraction of the loop fluid must be handled by the elasticity of the plastic loop Polyethylene e Pressurize the loop to a static pressure of 45 psig when installing a system in the fall going into the heating season e Pressurize the loop to a static pressure of 25 psig when installing a system in the spring or summer going into the cooling season After operating the heat pump for a period of time any residual air in the system should be bled off and the static pressure should be verified and adjusted if necessary Add additional water antifreeze mix with the purge cart to bring the pressure back to the original setting if required PIPE INSULATION All ground loop piping inside the structure between the structure entry point and the heat pump should be insulated with 3 8 thick closed cell pipe insulation to prevent condensatio
56. e Indoor Ball Valve and open the right isolation valve of the Indoor Circulator 9 Purge until no air can be heard leaving the drain hose 10 Close the Zone Ball Valve and open the right isolation valve of the Zone Circulator 11 Purge until no air can be heard leaving the drain hose 12 Close the Indoor Ball Valve and open the right isolation valve of the Indoor Circulator 13 Purge until no air can be heard leaving the drain hose 14 Open the right isolation valve of the Indoor Circulator 15 Open the Zone Ball Valve 16 Close the Indoor Boiler Drain and then close the Zone Boil er Drain when the desired system pressure is obtained wg Repeat the above procedure as necessary to ensure all of the air has been removed then remove the purging equip ment Date 05 DEC 2012 DOMESTIC WATER CONNECTIONS A typical piping diagram for a pre heat tank configuration can be found in drawing 000970PDG at the end of this section Be sure to note the position of the check valve and the direction of water flow Other configurations are possible and there may be multiple units tied together in larger buildings WARNING USE ONLY COPPER LINES TO CONNECT N THE DESUPERHEATER TEMPERATURES COULD REACH 200F SHOULD THE DHW CUTOUT SWITCH FAIL POTENTIALLY RUPTURING PEX PIPING Ensure the tank is filled with water and under pressure before activating the heat pump Slightly loosen the boiler drain on the DHW
57. elevant section at the end of the troubleshooting guide Repair proce dures and reference refrigeration circuit diagrams can be found at the end of the troubleshooting guide STEP 1 Verify that the display is present on the heating or cooling aquastat If it is not present on either 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 appropriate aquastat for a call for heating or cooling depending on the season STEP 3 If there is no signal present across Y and of the safety board proceed to the AQUASTAT TROUBLE SHOOTING section otherwise proceed to STEP 4 STEP 4 If a fault code appears once 51 displays on the aquastat and the compressor does not attempt to start proceed to the FAULT CODE TROUBLESHOOTING section otherwise proceed to STEP 5 STEP 5 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 STEP 7 If the heat pump appears to be operating properly but
58. eoooo 18 2 Cable ___ Drawn Approved Chris Geddes Approved By 01 Initial Release Release C GEDDES C GEDDES 07 SEP 07 REV IMPL BY APVD BY 000647MAN 03 Checked B Chris Geddes Approved By Typical Heating Only Zone Connections EM Series In Floor Heating Only ZONE 1 Heating Thermostat Signal may not be required W 18 2 for certain Cable thermostats E _ _ 18 2 Cable Zone Valve S In Floor Heating Only ZONE N Heating Thermostat Signal may W not be required 18 2 for certain Cable thermostats 18 2 Cable Zone Valve S Fan Coil ZONE 1 Heating Only Zone Heat Cool or Heat only CRYWG Thermostat 18 4 Cable Thermostat to Fan Coil 4 oo Heating CRY WG1G2G3 Zone Valve 2 Pipe Fan Coil Fan Coil ZONEN Heating Only Zone Heat Cool or Heat only Thermostat Vy 4 18 4 Cable Thermostat to Fan Coil Heating I OT _ WG1G2 3 Zone Valve 170 Plantation Rd MARME GEOTHERMAL Drawing Name Typical Heating On
59. for single stage units Electric Heat A dry contact closure Contactor Coil between R and O Heat Cool activates cooling Select Relay mie dL Drawn B 170 Plantation Rd 000208 GEDDES C GEDDES 07 MAY 12 Chris Geddes MARITIME GEOTHERMAL 2 04 000198 GEDDES GEDDES 07 12 Checked By WS AY 07 E4Z 6H4 000117 C GEDDES C GEDDES 14 MAY 08 Approved ENG Dsts Drawing 1 k k kk kkk 1 000110 Geppes 25 os eis Geddes EMW HAC 1 Schematic Diagram ECO IMPL BY APVD BY DATE A 000448SCH 05 1 of 1 Date 05 DEC 2012 Page 45 000647MAN 03 OQOOC 2000 10 psig Electric Heat Safety Cut out Indoor Circulator Stage 2 Coil Pump Relay Coil N A for single stage units 4 Reversing Valve A Relay Coil A8 099 40 AVN 2 5310039 0 LO 934 53 20 2 04000 s LAAHS 25143295 us Rb ee OV ee ANS ET 814697000 Raum nr 921 JequinN BuiweJg bumed 80 AVN 39989 0 39939 411000 0 Jo peejsui 273 1 AWW 20 3 39 2 0 96000 S 0 0 uo Jeuiuue 804 O gt
60. gd MOT spol seules SIU ui peziDueuo op MWS ALON Jeyog Joopu Joyng oJnssoJd Add ONEA lt 5 OSI dung 1r Joopu 9qoJd jejsouueu bitis 9402 s OSI dund 08 9007 eJnssejj 907 9UOCZ 000647MAN 03 Page 35 Date 05 DEC 2012 5 5 7 5 x Q Q Q 2 2 953870100 ao 133 5 nolo arakon seueg OVH MIA3 ome 039 02 Ag pe ouddy LNO 1 19113 1 p u N JojeouJednseq E 4 2 jeuondo lt i m _ Diem gt 4 doo1 uedo A 99 185 CH 55 MOT oL doo 1 2 L 41 944 S uonejeDujes seues 9VH MIN3
61. ical Ground Water Installation for Size 25 75 Heat Pumps for Units With Brass FPT Fittings TACO 24VAC EBV Electronic Ball Valve NOTE Refer to the heat pump labels HEAT PUMP for connection locations CONNECTIONS Connect the harness plug to the connector inside the heat ELECTRICAL CONNECTOR OUTDOOR OUT SUPPLY OUT 1 Brass FPT 1 Line NOTE Remove valve the valve in the open P T Plugs OUTDOOR IN qe SUPPLY IN 1 Brass FPT 1 Line His It is recommended that either unions or boiler drains be installed to provide connection points for flushing the coaxial exchanger should it need to be cleaned due to scaling head and manually place position before soldering NOTE Dole valves can be quite noisy Placing a the optional ball valve approximately two feet from the Dole valve can reduce the noise level Alternately the Dole valve can be placed outside the home Dole Valve Recommended for Flow Setting To Second Well Field Ditch Pond Etc uem 1 Ball Valve optional Air Bladder Tank Pressure Pressure Gauge Switch 0 60PSIG C well Pump 125psig PRV Air Bladder Tank Table HEAT PUMP Air Bladder Tank Size MODEL SIZE IGAL Litres To House Based on 2 minute well pump run time A larger tank may be used if a longer run time is desired zs TACO 24VAC Slow Close Water Valve Conne
62. in heating mode 1 Low or no outdoor loop flow 2 Low Outdoor loop entering liquid temperature 3 Dirty or fouled Outdoor loop heat exchanger B High Pressure Control The high pressure safety control monitors the compressor discharge pressure and will shut the compressor down if the condensing pressure becomes too high There are 3 main reasons why this control would activate in response to the operating conditions of the unit while operat ing in heating mode 1 Low or no Indoor loop flow 2 High Indoor loop entering liquid temperature 3 Dirty or fouled Indoor loop heat exchanger 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
63. inal strip verify there is voltage at Y HP1 HP2 LP1 LP2 and both flow pins but no voltage present at CC Replace control board Faulty run capacitor Check value with capacitance meter Replace if faulty Single phase only Should match label on capacitor Compressor will hum while trying to start and then trip its overload Loose or faulty wiring Check all compressor wiring includ Fix any loose connections Re ing inside compressor electrical box place any damaged wires Faulty compressor Voltage on line side with contactor Replace contactor 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 Thermal overload on Ohmmeter shows reading when Proceed to Operation Trouble compressor tripped placed across and S terminals and shooting to determine the cause infinity between RorC amp S ofthe thermal overload trip valid resistance reading is present again after the compressor has cooled down Burned out motor Hemove wires from compressor Replace the compressor open winding Ohmmeter shows infinite resistance between any two terminals Note Be sure compressor overload has had a chance to reset compressor is hot this may take several hours Burned out motor Hemove wires from compressor Replace the compressor shorted windings Resistance between any two termi nals i
64. ing is the de fault mode and cooling has priority lt is recommended that the system be designed by a qualified system designer to ensure proper functionality TABLE 2 shows typical settings for the aquastats With these settings Stage 1 will activate when the tank temperature reaches the activation point If the load is too great the tank temperature will continue to drop when heating rise when cool ing until Stage 2 is activated As the tank temperature stops dropping and begins to increase when heating decrease when cooling Stage 2 will turn off before Stage 1 rather than at the same time as Stage 1 There are three main advantages to this ess aquastat probe lag leading to reduced overshoot as the Date 05 DEC 2012 tank temperature rate of change is reduced when only Stage 1 is active e Prolonged Stage 1 runtime leads to increased overall effi ciency as Stage 1 has a higher COP than Stage 2 e Reduced number of compressor starts The settings may be changed as desired however Stage 1 setpoint for heating should not exceed 120 F 49 C Stage 1 cooling setpoint should not be set below 43 F 6 Exceeding these setpoint limits will cause the heat pump operating pres sures to approach the safety control settings possibly causing nuisance shut downs TABLE 2 Typical Aquastat Settings Activation is indirectly set by the Setpoint and Delta values If fan coils are being heated it may be require
65. instructions 2 Products which have insufficient performance as a result of improper system design or improper application installation or use of MG s products 3 Electricity or fuel or any increases or unrealized savings in same for any reason whatsoever cept for the limited labour allowance coverage set forth above MG is not responsible for 1 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 1 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 m X This Limited Express Residential Warranty applies to MG Residential Class products manufactured or after February 15 2010 MG S LIABILITY UNDER THE TERMS THIS LIMITED WARRANTY SHALL APPLY ONLY TO 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 RECI
66. lectric heat timer knob counter clockwise as far as it will go Turn on the electric heat breaker inside the unit The yellow light on the side of the unit should turn on Measure the L1 current draw with an clamp meter and record the value It should be between 45 and 52A Set the electric heat timer to the desired setpoint 0 2hours 1 hour is the minimum recommended value Cooling Mode Reversing units only 1 2 3 Turn the compressor breaker inside the unit off Set a zone thermostat to cooling mode to switch the unit to cooling mode Turn the compressor breaker on again Monitoring the refrigeration gauges while the unit runs Record the following after 10 minutes of runtime Suction pressure Discharge pressure Outdoor Loop In Supply In temperature Outdoor Loop Out Supply Out temperature Outdoor Delta T 4 Allow the unit to run through a cycle Record the aquastat setpoint and the suction pressure when the unit shuts off Final Inspection Turn the compressor breaker off Set the aquastat s to the final settings and record the values Turn the power off to the unit and remove all test equipment Turn the compressor breaker back on Install the electrical box cover and the access panel on the heat pump Install the service port caps securely to prevent refrigerant loss Do a final check for leaks in the ground water ground loop system and ensure the area is clean Turn the power
67. ly Zone Wiring Diagram EM Series Size Drawing Number REV SHEET 00053106 Date 05 DEC 2012 MFG Page 10 EURI 902585000 193 5 JequinN A8 004 OO 59055 37 DUMM 9007 jeord MT E ES 1 3 1039 JAIL 40 LL amener U m T ueg edid edid edid peeds euo 129195 peddinbe peeds ue4 9 peddinbe ue4 29 ue4 9 0 uey jeuBig 7 5 LVLSOWYSHL 000647 03 gt 3 2 peeds euo 0995 peddinbe ue4 29 peddinbe peeds ue4 29 H peedg ue4 9 DIO D 7
68. n and dripping onto floors or walls 19 000647MAN 03 Geo Flo Circulator Pump Module Installation Units with Brass FPT Fittings Air Bladder 2911 1 to 1 1 4 PE Socket els Pressure Gauge 1 Fill amp Purge access ports 0 60PSIG Boiler 2914 Camlocks can be used e Drain for quick connections Fittings can be removed and reused on other jobs when purging is complete mc a H Connect wiring to appropriate voltage terminals marked OUTDOOR CIRCULATORS in Boiler Drain the heat pump electrical box P 2 nd NOTE 1 or 2 Basement Refer to the heat pump labels pump Wall module for connection locations HEAT PUMP P T PI CONNECTIONS 9S OUTDOOR IN e lt 1 1 4 3408 SUPPLY IN 1 Flexible Rubber Hoses copper or other suitable E OUTDOOR OUT Qu piping 100 psig min SUPPLY OUT Available Fittings gt 3144 1 Sweat optional P T Fill gap between 2913 1 Barbed insulation and wall 1 FPT Suitable 1 MPT 3072 1 MPT with expanding foam Brass Fittings Adapter NOTES Circulator Pump Module should be mounted vertically to minimize the possibility of air locking the circulators All lines inside the structure and through the wall should be insualted with 3 8 to 1 2 thick closed cell pipe insulation e Holes through the foundation structure should be filled with expanding foam from both sides to prevent le
69. n the control board and C of the terminal strip as well as LP2 and C 24VAC is present across and C and LP2 and C but no voltage is present across CC on the con trol 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 Verify 24 is present between each flow switch pin on the control board and the C terminal of the terminal 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 Page 26 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 Replace flow switch if signal is not present at both terminals on the control board Replace control board Date 05 DEC 2012 COMPRESSOR TROUBLESHOOTING L Fault PossibleCause Recommended Action _ Compressor will Tripped or faulty compres Reset if tripped If not tripped verify Determine why breaker was not start sor breaker that there is 230VAC across L1 and Replace breaker if faulty L3 of the compressor contactor Faulty control board Measuring from C on the term
70. nder said allowance schedule they 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 1 Air filters fuses refrigerant fluids oil 2 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 unqualified personnel Mold fungus or bacteria damage Corrosion or abrasion of the product 0 Products supplied by others 1 Products which have been operated in a manner contrary to MG s printed
71. ng 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 anytime the refrigeration system has been exposed to the atmosphere VACUU
72. no hot or cold water is making it to the zones proceed to the ZONE TROUBLESHOOTING section NOTE To speed up the troubleshooting process the Test Jumper on the safety 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 POWER SUPPLY TROUBLESHOOTING Possible Cause Verification Recommended Action No power to the Disconnect switch open Verify disconnect switch is in the ON Determine why the disconnect heat pump if installed position switch was opened if all is OK close the switch Fuse blown At heat pump disconnect box Reset breaker or replace fuse Breaker Tripped voltmeter shows 230VAC on the line with proper size and type Time side but not on the load side delay type D No display on Transformer breaker Breaker on transformer is sticking Push breaker back in If it trips either aquastat tripped out again locate cause of short circuit and correct Faulty transformer Transformer breaker is not tripped Replace transformer is present across L1 and L3 of the compressor contactor but 24VAC is not present across and C of the terminal strip Faulty aquastat 24VAC is present across 24V Replace aquastat and COM of the aquastat but there is no display Date 05 DEC 2012 Page 25 000647MAN 03 AQUASTAT TROUBLESHOOTING Possible Cause No signal to Y of safety board Incorrec
73. nockouts one for connections to the in door circulator the other for connections to the circulator pump module for ground loop applications There are three 1 2 open ings with plastic grommets grommet hole is 3 8 in the upper section of the electrical box for connections to the 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 CON FORM TO LOCAL CODES 000647MAN 03 Page 6 CIRCULATOR PUMP MODULE WIRING GROUND LOOP ONLY The heat pump has provisions for connecting the circulator pump module so that the pumps will be turned on whenever the compressor operates Connect the circulator pump module to the appropriate two terminals of the terminal strip marked OUTDOOR CIRCULATORS in the heat pump as per the volt age of the circulator pump module Ensure that the total current draw of all circulators connected to the terminal strip does not exceed the value indicated on the label in the heat pump electri cal box Refer to the electrical box drawing on the electrical box c
74. nspect for leaks Generally not required for closed loop systems Whenever system performance is reduced for open loop COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE GROUNDWATER STEP 1 Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger STEP 2 Blow out the heat exchanger into a clean 5 gallon bucket using compressed air If a 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 recommended Disconnect the purge system dispose of the solution RYDLYME is non toxic and biodegradable and as such can be poured down a drain STEP 6 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 8 8 2 23 Depending on the plumbing there should be either unions or boiler drains for to access the heat D gt lt 3 Q 2 D COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE GROUND LOOP STEP 1 Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position Connect a compressed air an
75. on R410a 60 Hz F F USGPM 25 BTU Hr Watts Amps Watts WW 25 oF 5 F m B 1106 23 ses 00 109 Watts 52 124 15 272 57 201 16 760 62 530 18 321 68 823 20 165 6 2 3 4 6 8 17 49 as wes 1060 60 22 100 75 1 60148 1060 454 600 45 168 512 99506 5497 283 5682 488 1040 119 168 1146 72 107 49 2042 1 60142 1060 459 135 54 22 1 80 15 F 05 BTU Hr Compressor ZP70KWE PFV Watts 40 0 48 9 1 060 46 4 USGPM E 9 0 5 0 9 8 5 4 10 6 3 9 6 4 75 575 22 143 82 036 24 036 88 911 26 051 96 238 28 198 410 60 Hz BTU Hr C 34 1 0 34 1 1 34 L s 16 8 1 060 16 8 1 060 16 8 1 2 1 060 4 16 8 1 3 1 060 35 16 8 1 060 35 16 8 1 6 1 060 35 16 8 1 7 1 060 35 16 8 1 8 1 060 iN Date 05 DEC 2012 C C 41 6 9 0 41 9 8 7 73 148 2 951 17 8 3 137 23 3 55 48 242 683 Watts COPc C 45 Weg 55 12 8 42 0 8 6 71 982 3 244 18 8 3 431 21 0 60 42 2 4 70 676 3 556 57 47 20708 252 424 8 2 69 144 3 7
76. oor zones There may be multiple fan coil units heating and or cooling A zone valve is not required if the unit has a internal valve Domestic Pre Heat Tank is for on demand apllications The tank must have a heat eaxchanger in it or an external one must be used to separate the zone loop from the potable water supply 5 Ensure the floor circulator is adequately sized to accomodate the type and number of zones connected to the system 6 The pool aquastat will operate the Pool Spa Zone Valve e 59 79 C GEDDES EE Eco amp Bv APVD BY DATE _ o 9 SEP 07 5 edaes MARITIME GEOTHERMAL me Chris Geddes ENG Chris_Geddes i ses cu beue Chris Geda WE Typical Zone Types for Hydronic Applications Size Drawing Number REV SHEET 000530PDG 000647MAN 03 Page 14 Date 05 DEC 2012 Ground Water System Information GENERAL REQUIREMENTS 1 The temperature of the well water should be a minimum of 39 F 4 C and should normally be 45 7 2 The well system must be able to supply the required water flow as listed under the Total Flow column in TABLE 7 TABLE 7 Required Flow and Air Tank Sizing Heat Minimum Pump Bladder Flow Tank IGPM IGal USGPM USGPM USGPM USgal 8 9 6 11 13 2 22 26 10 12 0 13 15 6 26 31 12 14 4 15 18 0 30 36 14 16 8 17 20 4 34 41 14 16 8 34 41 17 20 4 These
77. or the suction pressure Points pitted or burned Contactor sometimes sticks causing the com pressor to run without the fan tripping the high pressure control Verify wiring is good out a few times to loosen it Re place TXV if this does not work Replace contactor Correct the wiring or replace the circulator OPERATION TROUBLESHOOTING COOLING MODE Fault Possible Cause Verification Recommended Action Verify that there is 24 across Correct control wiring or replace Control wiring not set up properly or cooling select relays not functioning Faulty reversing valve so lenoid coil and C of the terminal strip when calling for cooling Verify solenoid by removing it from the shaft while the unit is running There should be a loud whoosh sound when it is removed relays Replace solenoid if faulty Faulty reversing valve Low or no Outdoor liquid flow A click can be heard when the coil is energized but the unit continues to heat instead of cool Delta T across the Outdoor Loop ports should be between 8 12 4 7 9C or compare pressure drop to the tables for the unit Replace reversing valve Determine the cause of the flow restriction and correct it Verify pumps are working for ground loop systems Verify well pump and water valve is working for ground water systems Entering liquid tempera ture too warm Dirty or fouled coaxial heat exchange
78. ore pumping power to maintain the required flow to the heat pump PIPE INSULATION All ground water piping to and from the Outdoor Loop ports on the heat pump should be insulated with 3 8 closed cell pipe insulation to prevent condensation and dripping onto floors or walls WATER DISCHARGE METHODS Water disposal methods vary from area to area However some consideration should be made to prevent the cooled discharge water from immediately coming in contact with the supply source Attempting to return the water to the source well will eventually cool the water so much that the heat pump will shut off on its low pressure safety control Acceptable methods for disposing of the waste water are listed below The waste water is clean the heat pump has no other effect than reducing the temperature of the water Refer to drawing 000619INF for typical disposal method diagrams e Second well return well e Percolation Drain ditch leaching field e Pond river or stream ENSURE SELECTED METHOD CONFORMS TO LOCAL CODES 000647MAN 03 A return well should be a minimum of 80 ft from the supply well for residential applications The water returned to the well will not necessarily be pumped into the same aquifer depend ing on underground conditions The return must be able to sup ply at least the same quantity of water as the amount you wish to recharge into it If the static level level when not being pumped of a well is high 10 to
79. over for more information CONTROL REQUIREMENTS The heat pump comes equipped with a two stage heating aquastat and two stage cooling for reversing units The stages are 51 Stage 1 compressor and S2 Stage 2 compressor as well as auxiliary heat on a 0 2 hour timer The EMW unit operation is self sufficient the only control signals required are to turn on the Zone Circulator s located inside the unit and to switch to cooling mode for reversing units The electrical box diagram on the electrical box cover pro vides a description of the signal connections in the heat pump They are also listed in TABLE 1 below TABLE 1 Control Signal Description Description 24VACCommon Ground 24VAC Common Ground 24 Mode reversing valve The zone circulator is activated by connecting R and Z together via dry contacts The unit can be switched to cooling mode by connecting R and O together via dry contacts Dry contacts are used for all heat pump connections to ensure that the heat pump control signals remain isolated from the rest of the system Heating cooling systems should have a method to disable radiant in floor heating zones while in cooling mode to prevent condensation on the floor Drawing 000531CDG show a typical wiring diagram for a heating only setup while drawing 000583CDG depicts a heating cooling wiring diagram These drawings represent a basic system in which heat
80. r typically for ground water unlikely for ground loop Most likely caused by undersized ground loop Disconnect the water lines and check the inside of the pipes for scale deposits Page 29 Verify the ground loop sizing In crease the size of the ground loop if undersized Have a qualified service technician backflush the coaxial exchanger 000647MAN 03 OPERATION TROUBLESHOOTING COOLING MODE Paul PossibleCause Recommended Action ___ High Discharge pressure continued Unit is overcharged Only possible if unit has been opened in the field and incorrectly charged High Suction Pressure may appear to TXV adjusted too far open High sub cooling low delta T across water coil Remove 1 2lb of refrigerant at a time and verify that the discharge pressure reduces Verify superheat It should be be tween 8 12 F 3 6 Superheat will be low if TXV is open too far Adjust to obtain 8 12 3 6 superheat not be pumping TXV stuck open Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Adjusting the TXV does not affect the superheat or the suction pres sure Low super heat and dis charge pressure Leaking reversing valve Low Suction Pressure Low or no flow in heat ex changer to buffer tank circuit TXV stuck almost closed or partially blocked by for eign object Re
81. ric Backup Nominal Size lt lt 12K 12 kW 45 3 Ton 2 uu Indoor Loop Exchanger 65 5 Ton 75 6 Copper 80 6 2 Cupro Nickel CuNi Outdoor Loop Exchanger Functions Z Cupro Nickel CuNi Heating DOING Compressor Stages W Domestic Hot Water 1 Stage T 22 Stage Refrigerant 2 stage unless unavail R410a able due to voltage code refer to the Elec trical Tables Voltage Code 1 2 230 1 60 VAC 2 208 3 60 6 220 1 50 VAC 7 380 3 50 000647MAN 03 Page 2 Date 05 DEC 2012 APPLICATION TABLE STAGES OUTDOOR COIL INDOOR COIL ELECTRIC REVISIONS 05 FUNCTION REFRIGERANT VOLTAGE UT EN EN 2 HACW HACW 7 1 2 7 7 O1 7 01 011 O1 C1 O1 01 01 C1 SZE 45 This manual applies only to the models revisions listed in this table Date 05 DEC 2012 Page 3 000647MAN 03 Table of Contents INSTALLATION INFORMATION PAGE 6 S CUNO ror pee 6 TNC EEEE GEREI EE 6 6 Electrical Connections ____ ____ _____
82. roundloop has been installed and all connections are completed between the heat pump circulator pump module and ground loop the entire ground loop system should be pressure tested with air to 100 PSIG to make sure there are no leaks on any of the inside fittings Soap all joints and observe that the pressure remains constant for 1 hour When satisfied that all connections are leak free release the air pressure and connect a purge cart see Diagram D to the flushing access ports at the pump module refer to drawing 000906CDG A temporary flushing system can alternately be constructed using a 45 gal barrel and a pump with sufficient volume and head capability to circulate fluid at a velocity of at least 2 ft min through all parts of the loop DIAGRAM Typical Purge Cart Adjust the circulator pump module valves to connect the purge cart to the ground loop Begin pumping water through the ground loop ensuring that the intake of the pump stays submerged at all times by continuously adding water Water flowing back from the return line should be directed below the water level in the barrel or flush tank to prevent air being mixed with the outgoing water 18 Date 05 DEC 2012 Once the lines have been filled and air bubbles are appearing in the line adjust the circulator pump module valves to circulate water through the heat pump using the same technique as described above When all air is removed reverse the flow of
83. s are recommended for connection to the system as a single tank is used for heating and cooling It is recommended that all piping be insulated with 3 8 thick closed cell pipe insulation This is a MUST for any piping that is used for cooling to prevent dripping onto floors and walls Care should be taking when wiring the system to ensure that radiant in floor heating zones are disabled whenever the heat pump is switched to cooling mode 000647MAN 03 Typical Zone Types for Hydronic Applications Floor Zone 1 Floor Zone 1 Valve Floor Zone N Floor Zone N Valve Fan Coil Unit 1 Heating and or Cooling Fan Coil 1 Zone Valve Only if Fan Coil does not have a valve Fan Coil 1 Zone Valve Only if Fan Coil does Zone Zone not have a valve Return Supply Domestic Pre Heat Domestic Pre Heat Domestic Pre Heat Zone Tank Zone Valve Pool Spa Pool Spa Zone Zone Valve Titanium Heat Pool Spa Exchanger Temperature Probe l POOL SPA Pool 1 Floor zones are heating only Cooling a floor zone will cause condensation the floor Floor zone valves should be wired through a relay that is controlled by the cooling signal O that breaks the signal when in cooling mode to ensure that they cannot accidentally be energized There may be multiple fl
84. s below the specified value Motor shorted to ground Remove wires from compressor If any terminal to ground is not Check for infinite resistance between infinite replace the compressor each terminal and ground Seized compressor due to Compressor attempts to start but Attempt to rock compressor locked or damaged trips its internal overload after a few If normal operation cannot mechanism seconds Run capacitor already ver be established replace ified compressor Compressor Start capacitor faulty Check with capacitance meter Replace if faulty starts hard Single phase only Check for black residue around Remove black residue in electri blowout hole on top of capacitor cal box if any Potential Relay faulty Replace with new one and verify Replace if faulty Single phase only compressor starts properly Compressor is tight due Compressor attempts to start but Attempt to rock compressor to damaged mechanism trips its internal overload after a few free If normal operation cannot seconds Run capacitor has been be established replace compres sor verified already Compressor Faulty Stage 2 module Verify if 24VAC is present across Replace module if signal is pre Stage 2 will not NO and C of Stage 2 of the aquastat sent Check wiring if signal is not activate that it powered up present Date 05 DEC 2012 Page 27 000647MAN 03 OPERATION TROUBLESHOOTING HEATING MODE Fault
85. t aquastat setup Verification Aquastat does not indicate 51 on the display Recommended Action Correct the setup Faulty aquastat Setting s not retained Faulty aquastat No 24VAC between Stage 1 NO and COM of the aquastat when 1 is indicated on the aquastat display E2 error message Can cause the unit to trip a safety control if the set ting is too high or low Replace aquastat Replace aquastat FAULT CODE TROUBLESHOOTING Fault Code 1 High Pressure Control Fault Code 2 Low Pressure Control Fault Code 3 Flow Switch 000647MAN 03 Possible Cause Faulty High Pressure Con trol open Must be a signal present on Y1 for this test HP pressures must be at static levels Verification Verify if there is 24 across HP1 on the control board and C of the terminal strip as well as HP2 and C Recommended Action Replace high pressure control if voltage is present on HP1 but not on 2 Faulty control board Faulty Low pressure con trol open Must be a signal present on Y1 for this test HP pressures must be at static levels Faulty control board Unit out of refrigerant Flow switch jumper re moved or faulty Flow switch faulty Only if installed Faulty control board 24VAC is present across HP1 and C1 and HP2 and C but no voltage is present across CC on the control board and C Verify if there is 24VAC across LP1 o
86. t be allowed to tum on again until the Rating amp 30 VAC anti short cycle delay expires and both pressure switches are Fault aan closed The flow switch will have 30 second bypass timer in Type Relay SPDT which the control will ignore an open flow switch for the first 30 m seconds if the flow switch remains open after the 30 second Rating 1 amp 30 timor expires the unit will de energize the compressor Time Delay and begin the anti short cycle delay the control experiences Anti short cycle time 5 minutes fixed 20 three high pressure low pressure or fow switch faults in a 60 test made Minute period it will lockout the compressor and energize the NI fault manual reset Of power will be required to reset Mechanical Tociout coneinon Board dimensions 3 5 x 3 25 x 1 control has a status LED to indicate which type of Fault or Mounting Surface mount using 4 6 or 8 screws lockout has occurred If high pressure Fault lockout occurs tre 4tatus LED wil blink once Ir low 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 Wiring Diagram 0 m ues 4 B 2 e af ka ia IL CHO 8 Ac
87. t has been either replaced or repaired return ori 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 origina warranty period 1 3 The Inception Date shall be date of original unit installation as per date on installation Startup Record or six 6 months from date of unit 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 Iwarranty 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 Department and only as follows MG Units for two 2 years from the Warranty Inception Date dem 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 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 five 5 years from the Warranty Inception Date Labour costs not covered by this Limited Express Residential Warranty to the extent they exceed the amount allowed u
88. t water pump Check water lines for lines Acid treat the domestic hot heat exchanger obstruction water coil Faulty DHW cutout failed Check contact operation Should Replace DHW cutout if faulty open close at 120 F and open at 140 F Heat pump not running Note the amount of time the heat Temporarily turn up the tank enough hours to make pump runs in any given hour thermostats until colder weather sufficient hot water creates longer run cycles Water is too hot Faulty DHW cutout failed Check contact operation Should Replace DHW cutout if faulty closed close at 120 F and open at 140 F Thermostat on hot water Visually inspect the setting Readjust the setting to 120 F tank set too high Should 140 F if required by local code be set at 120 140 F if required by local code 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 Digital orifice that varies its area inversely with In line Flowmeter pressure so that a constant flow is maintained Fr Multimeter Voltmeter Date 05 DEC 2012 33 000647 03 REPAIR PROCEDUHES PUMP DOWN PROCEDURE Connect the refrigerant recovery unit to the heat pump service ports via a refrigeration chargi
89. tank temperature Faulty aquastat 52 is showing on the display but Replace aquastat 24VAC is not present across Stage 2 NO and COM in the aquastat Faulty elements With power off to the unit measure Replace the faulty elements the resistance across the T1 and T3 terminals of the electric heat contac tor Under 6 ohms both elements good Infinity both elements bad Low Electric Heat One faulty element With power off to the unit measure each element individual the resistance across the 1 and to determine the faulty one and terminals of the electric heat contac replace it tor 6 to 120hms one element bad Date 05 DEC 2012 Page 31 000647MAN 03 ZONE TROUBLE SHOOTING Faut Possible Cause Verification Recommended Action No hot old water Faulty zone thermostat No 24VAC signal present across T Locate the problem and correct it to individual wiring or zone valve and C of the heat pump terminal zone head s strip Faulty zone valve s Other zones work 24VAC is present Clean or replace zone valve s across T and C of the heat pump terminal strip but no hot cold water reaches the zone No hot cold water Shut off valve closed Verify that all valves in the zone Open any valves that are closed to any zones loops are open including isolation valves at the zone circulator inside the unit Faulty zone circulator 24VAC is present across T and C of Replace cont
90. ter valve to open for ground water systems as well as the circulator pumps Check the refrigeration gauges The suction and discharge pressures will depend on the loop temperatures but they should be about 90 110PSIG and 250 320PSIG respectively for a typical start up Monitoring the refrigeration gauges while the unit runs Record the following after 10 minutes of runtime Suction pressure Discharge pressure Outdoor Loop In Supply In temperature Outdoor Loop Out Supply Out temperature Outdoor Delta T should be between 5 8 3 49 Outdoor flow if available Compressor L1 C current black wire place meter between electrical box and compressor Let the unit run through a cycle Record the setpoint and the discharge pressure when the unit shuts off For units with a desuperheater turn the power off to the unit Connect the brown wire with the blue insulated terminal to the compressor contactor as shown in the electrical box diagram Turn the power to the unit on Open a zone or zones and let the tank cool down until Stage 2 is activated Close the zone s again Verify the DHW IN and DHW OUT temperatures if applicable by hand caution pipes get hot If the DHW OUT line does not become hotter than the DHW IN line the circulator is air locked Bleed the air from the system and check the temperature differential again to ensure there is flow from the circulator Turn the e
91. ting 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
92. tion for unit flow requirements Loop pressure drops can be calculated using software such as those mentioned in the Horizontal Ground loops section or can be calculated in a spreadsheet using the pipe manufacturer s pressure drop tables for pipe diameter and fittings The circulator pump module must be connected to the heat pump Outdoor Loop ports with a lineset suitable for the flow required with minimum pressure drop 1 rubber or plastic lines should be used The installation of P T plugs pressure temperature pronounced Pete s plugs is recommended on both the entering and leaving lines at the heat pump see Diagram C DIAGRAM C Typical P T Pete s Plug amp Thermometer Stems P T Plugs Pete s Plug Gage Adaptor THE PRESSURE G 1 Nh MAAN x NV NER NO 4 NC x DIAMETER PROBE OF 304 STAINLESS STEEL WITH UNION NUT Protective Cover included LUN NNS PROTECTION 4 PROCESS THREAD VALVE RETAINER 000647MAN 03 Page The P T plug will allow the installer or homeowner to check water flow through the loop by measuring the pressure difference through the heat exchanger and comparing it to that listed in the Model Specific Information section or the specifications document Optional fittings with P T ports are available for the circulator pump modules sold by Maritime Geothermal Ltd FLUSHING amp PURGING THE GROUND LOOP Once the g
93. to the unit on Set all zone thermostats to the desired values Startup Record 1 The startup personnel shall sign and date the Startup Record and have the startup witness or appropriate site personnel sign as well The startup personnel shall leave the Startup Record with the homeowner retain a copy for filing and send a copy to Maritime Geothermal Ltd for warranty registration 000647MAN 03 Page 22 Date 05 DEC 2012 Startup Record Sheet EMW Series Two Stage R410a Startup Date Installer Check boxes unless Installation Site Country Homeowner Name asked to record data Serial Circle data units Homeowner Phone PRE START INSPECTION Indoor and Zone Loops Hydronic All shut off valve are open full flow available Loop 1 and purged of air Antifreeze type Antifreeze concentration Weight Loop static pressure kPa Ground Loop All shut off valve are open full flow available Loop is full and purged of air Antifreeze type Antifreeze concentration 9e Volume 96 Weight Loop static pressure Ground Water Water Valve installed in return line System Flow control installed in return line Domestic Hot All shut off valves are open Lines are full and purged Desuperheater pump wire is disconnected Water High voltage connections are correct and securely fastened Circuit breaker or fuse size and wire gauge for Heat Pump Cir
94. uation the proper pump can be selected to maintain a pressure of 30 to 40 psig on the lines when the heat pump is operating However in some cases a well can supply a heat pump only if the minimum requirement for water is used Date 05 DEC 2012 Page 15 Water flow to the heat pump can be controlled very accurately by the installation of a reverse action refrigeration pressure valve in the discharge line of the unit Another more common method of regulating the flow is by the use of a DOLE Valve This valve will automatically control the amount of water flowing through it by varying the diameter of a flexible rubber orifice through which the water passes This minimizes the water usage of the unit and also prevents a re versing unit from running excessively low discharge pressure when in cooling mode Dole valves can be noisy it is recom mended that they be installed outside if possible Optionally a water flow meter can be installed in the dis charge line so that the exact amount of water flowing can be determined at a glance It should be placed between the Out door OUT Supply OUT pipe of the heat pump and the water valve With proper flow there should be 5 7 F 3 4 C delta between the IN and OUT water temperatures of the heat pump when operating in the heating mode All water line valves on both the supply and discharge lines should be either BALL or GATE valves GLOBE valves have a higher pressure drop meaning m
95. und Water Cooling 60 2 Page 38 Table 16 Heat Pump Electrical Information 230 1 60 Page 44 Table 17 Heat Pump Electrical Information 208 3 60 2 Page 44 Table 18 Heat Pump Electrical Information 220 1 50 Page 44 Table 19 Heat Pump Electrical Information 380 3 50 Page 44 DIAGRAMS Diagram A B amp G NHF 36 Pump Curve eo oa eoa Page 8 Diagram B Circulator and Major Component Locations Page 9 Diagram C Typical P T Pete s Plug amp Thermometer Stem Page 18 Di gram D Typical Ue Page 18 DRAWINGS 000531CDG Typical Heating Only Zone Wiring Diagram EM Series Page 10 000583CDG Typical Heating and Cooling Zone Wiring Diagram EM Series Page 11 000970PDG Single Unit Connection to DHW Pre Heat Tank Brass Page 12 000530PDG Typical Zone Types for Hydronic Applications Page 14 000907CDG Typical Ground Water Installation for Size
96. utoff valves are fully open and there are no restrictions in the piping from the heat pump to the ground loop and that full flow is available to the heat pump 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the loop contains the proper mix of antifreeze for the intended application Record the type of antifreeze and the mixture value on the startup sheet circle Vol or Weight 4 Record the static loop pressure on the startup sheet Outdoor Loop Ground Water 1 Verify there are no leaks in the connections to the unit Verify the water valve is installed and properly oriented in the return line 2 Verify that there is flow control in the return line Domestic Hot Water if equipped 1 Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the domestic hot water tank 2 Verify that the entire system has been flooded and all the air has been purged as much as possible Further purging may be required after the system has been operating for a while 3 Verify that the brown wire with the insulated terminal is disconnected in the electrical box Refer to the schematic diagram for more information Electrical 1 Ensure the power to the unit is off 2 Verify all high voltage connections Ensure that there are no stray wire strands
97. versing valve is the same tem perature on both ends of body common suction line is warm com pressor is running hot Replace reversing valve Aquastat set too low Verify aquastat setting Increase aquastat setting to recom mended value of 45 7 Check that isolation flanges and any ball valves are open Verify 115VAC to pump Check gauges for pressure drop Ensure flow path is unrestricted Replace pump if faulty Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Adjusting the TXV does not affect the superheat or the suction pres sure T XV may be frosting up Low or no refrigerant charge Faulty compressor not pumping Entering air temperature and air flow are good but suction is low Check static refrigeration pressure of unit for very low value Locate the leak and repair it opray 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 not occur while there Faulty compressor contactor Adjust the TXV all the way in and out a few times to loosen it Replace TXV if this does not work Adjusting the TXV does not affect the superheat or the su
98. y 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 linstaller 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 e Customer Service 2555 Petitcodiac New Brunswick 42 6H4 506 756 8135 or e mail to NOTE Some states or Canadian provinces do not allow limitations how long an implied warranty lasts or the limitation or exclusions of consequential or incidental damages so the foregoing exclusions and limitations 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 opera

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