Hydronic Air Handler (Fan Coil Unit) Installation and Service Manual
Contents
1. Cabinet Orientation 65 V Vertical H Horizontal Voltage Code 1 208 230 1 60 VAC Air Coil Fan Discharge Orientation _ T Top S Standard ai S Side Fan Type D Direct Drive Fan Motor E ECM Variable Speed APPLICATION TABLE VOLTAGE FAN CASE REVISIONS SDETV 6 ot o This manual applies only to the models and revisions listed in this table 001480MAN 01 Page 2 1 Sep 2015 Table of Contents TABLES DIAGRAMS amp DRAWINGS sic ai nain n s n os a il PAGE 4 INSTALLATION INFORMATION 2410 PAGE 5 Umt 050 0 Page 5 Un npa king the Uniti reo o Page 5 Optimum Placement rosins a AE biios Page 5 Electrical 0 0 Page 5 Thermostat Regulremellis Page 5 Plumbing COMMCCIIOM Ss asias loko lil rs ladito oa Page 5 Zone Valve and or Circulator o ococccoccccccccncconcconcconccnnccancranc cnn nennen nennen enn en en enne nennen nennen Page 5 a To ito SE a Page 6 A cc Page 6 Control Transformer 2 Mie Hulu vubesisitei ume datis ie xis M Exi UR EDU a EU xt ES e UC Page 6 SIZING AND DUCTWORK 5353221du8uuE is UR Ux o A in nadas PAGE 7 Hydronic Air Handler SIZIN serisonu a aa Page 7 DUCE Systems General sass anssi aai RR Page 7 Duct Systems Grill Layout 2 0 0 0 cece cee eee eee eee eens Page 7 Therm2. Registers are open and clear of objects Air filter and end cap are installed Condensate Drain is connected properly vented and free of debris Plenum heater is securely fastened if applicable Hydronic Loop All shut off valve are open full flow available Loop is full and purged of air Antifreeze type if applicable DEBE Antifreeze concentration Loop static pressure PSI EEG A PSI kPa High voltage connections are correct and securely fastened Circuit breaker or fuse size and wire gauge for Heat Pump 66 Circuit breaker or fuse size wire gauge and Plenum Heater size EE MN Low voltage connections are correct and securely fastened STARTUP DATA Voltage across L1 and L2 VAC Heating Mode Duct Return Duct Supply and Delta T In Out Out LM o o o 0 O 5 10 minutes Indoor In Indoor Out and Delta T Fan current black wire Fan shuts off and zone valve closes if applicable Fan off Valve Closed gt c o o 0 Cooling Mode Duct Return Duct Supply and Delta T Indoor In Indoor Out and Delta T O c o m o 0 10 minutes Fan shuts off and zone valve closes if applicable Fan off Valve Closed Date Installer Signature Homeowner Signature A total of three copies are required one for the homeowner one for the installer and on to be sent to Maritime Geothermal Ltd 1 Se
3. The ECM fan will provide proper airflow up to 0 5 inH2o for 1 2HP motors and 0 7 inH2o for 1HP motors The ductwork is poorly designed or greatly undersized if the fan motor cannot provide the required airflow Select a higher setting Air flow reduction is ena bled Fan Control Signal Har ness is loose AR1 and AR2 are connected with a dry contact Verify that the connector is properly inserted into the fan motor Gently tug on each wire to verify it is properly inserted into the connector Air flow reduction may not be fea sible with poor ductwork and or lower Air Flow selections In crease settings until unit operates properly Repair any loose connections Faulty Control Signal Har ness or faulty motor head Ensure signal is present on terminal strip Fan Control Signal Har ness and or Fan Power Harness is loose Faulty Control Signal Har ness or faulty motor head Ensure signal is present on terminal strip Measure 24VAC between White pin 3 and the following at the fan con trol signal harness insert probes in connector where wire is inserted do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow Black pin14 Stage 2 Violet pin 2 Verify that the connector is properly inserted into the fan motor Gently tug on each wire to verify it is properly inserted into the connector Measure 24VAC between White pin 3 and the following at the fan con tro
4. This warranty is subject to the following conditions 1 The hydronic air handler must be properly installed and maintained in accordance with MARITIME GEOTHERMAL LTD guidelines 2 Theinstaller must complete the Startup Record and return it to MARITIME GEOTHERMAL LTD within 21 days of unit installation 3 For new construction it is the responsibility of the building or general contractor to supply temporary heat to the structure prior to occupancy Geothermal heat pumps and air source heat pumps are designed to provide heat only to the completely finished and insulated structure Startup of the unit shall not be scheduled prior to completion of construction and final duct installation for validation of this warranty If a hydronic air handler manufactured by MARITIME GEOTHERMAL LTD fails to conform to this warranty MARITIME GEOTHERMAL LTD s sole and exclusive liability shall be at its option to repair or replace any part or component which is returned by the customer during the applicable warranty period set forth above provided that 1 MARITIME GEOTHERMAL LTD is promptly notified in writing upon discovery by the customer that such part or component fails to conform to this warranty 2 the customer returns such part or component to MARITIME GEOTHERMAL LTD transportation charges prepaid within 30 thirty days of failure and 3 MARITIME GEOTHERMAL LTD s examination of such component discloses to its satisfaction that such p
5. 31 000 9 1 36 600 10 7 28 000 8 2 29 500 8 6 1200 566 47 800 14 0 35 100 10 3 40 200 11 8 32 000 9 4 32 700 9 6 6 1500 708 52 900 15 5 40 800 11 9 44 800 13 1 37 500 11 0 36 900 10 8 2100 991 60 600 17 8 51 000 14 9 51 900 15 2 47 600 14 0 43 600 12 8 1000 472 48 100 14 1 33 000 9 7 40 200 11 8 29 500 8 6 32 000 9 4 1200 566 53 300 15 6 37 500 11 0 44 600 13 1 33 800 9 9 35 700 10 5 8 1500 708 59 800 17 5 43 600 12 8 50 200 14 7 39 700 11 6 40 600 11 9 2100 991 69 500 20 4 54 600 16 0 58 900 17 3 50 300 14 7 48 600 14 2 non geothermal application 27 200 8 0 31 200 9 1 33 800 9 9 36 000 10 6 37 800 11 1 25 200 7 4 29 000 8 5 34 400 10 1 39 600 11 6 43 600 12 8 46 300 13 6 26 200 7 7 30 200 8 8 35 900 10 5 41 200 12 1 46 400 13 6 51 300 15 0 ELECTRICAL TABLES Table 8 Electrical Information 208 230 1 60 Max Fuse Breaker Zone Circulator MCA 2 3 TABLE 9 Plenum Heater Electrical Information AA A A A CA Breaker A A FE A 10 10 8 8 6 75 361 451 so 6 ha ma 502 677 9 4 Ls 150 22 903 100 40 MCA Breaker A A 8 521 60 781 80 1042 100 001480MAN 01 1 Sep 2015 ELECTRICAL DIAGRAMS AHW Series
6. 5 5 0 6 0 6 0 7 0 7 1 8 4 9 4 9 7 10 7 10 8 12 8 12 4 12 4 12 6 14 6 14 6 16 6 16 8 18 8 18 0 20 0 22 0 22 2 24 2 24 4 26 4 26 8 26 8 26 4 32 6 34 8 36 Page 10 4 5 4 5 5 5 5 6x7 7x8 7x8 8x9 8x9 9 x 10 10 x 12 10 x 12 11 x 15 11x 15 14 x 16 14 x 16 14 x 20 14 x 20 16 x 22 16 x 22 18 x 23 18 x 23 20 x 25 20 x 25 22 x 24 24 x 28 24 x 28 26 x 30 26 x 30 28 x 32 28 x 32 28 x 34 28 x 34 33 x 33 35 x 35 37 x 37 Rectangular Equivalents in 5x5 5x5 6x6 6 5 x 6 5 8x8 8x8 8 5 5 8 5 5 9 5 5 11 1 11 1 12 4 12 4 15 5 15 5 16 7 16 7 18 9 18 9 20 0 20 0 22 2 22 2 24 4 26 6 26 6 28 8 28 8 30 0 30 0 30 2 30 2 1 5 Startup Procedure The following steps describe how to perform the startup of the unit The AHW Series 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 i
7. Sep 2015 Sizing and Ductwork HYDRONIC AIR HANDLER SIZING Once the total heat loss has been calculated for the space the AHW Series unit can be sized using the Capacity Ratings in conjunction with the minimum expected entering liquid tempera ture The hydronic air handler output must be able to match the total heat loss at the selected entering water temperature in order to provide a comfortable environment with minimal auxilia ry heat The tables can be found in the Model Specific Infor mation section DUCT SYSTEMS GENERAL Ductwork layout for a heat pump or air handler system will differ from traditional hot air furnace design in the number of leads and size of main trunks required Air temperature leaving the unit is normally 90 105 F 32 40 C much cooler than that of a conventional warm air furnace To compensate for this larger volumes of lower temperature air must be moved and consequently duct sizing must be able to accommodate the greater air flow without creating a high static pressure or high velocity at the floor diffusers A duct system capable of supplying the required air flow is of utmost importance Maritime Geothermal Ltd recommends that the static pressure be kept below 0 2 inches of water total In some instances the number of floor diffusers will actually double when compared to the number that would be used for a hot air oil fired furnace Refer to TABLE 4 at the end of this section Generally allow 10
8. allows the con densate which forms during the air conditioning cycle to be re moved from the unit The drain should be connected as per local codes During high humidity weather there could be as much as 25 gallons of water formed per day Care should be taken in the spring to ensure that this pipe is not plugged with dust that has collected during the winter caus ing the condensate to overflow into the bottom of the heat pump and onto the floor The condensate drain must be externally trapped Proper venting is required external to the heat pump Refer to local codes to ensure the installation is done properly Drawing 001507CDG shows a typical installation 1 Sep 2015 Typical AHW Series Duct and Condensate Connections Modular Case TO Radii Hot Air Out Supply Cold Air In Return Hot Air Out Supply Flexible Duct Collar minimum 12 above plenum heater elements if installed Flexible Duct Collar Option 1 Optional Electric Plenum Heater Internally Mounted Flexible Duct Collar Option 2 Air filter Filter Rack Can be mounted to the left or right Condensate Drain 3 4 PVC Socket Must be externally trapped Venting may be required refer to local building code al e E Teen SF Ducts should be sized as per the Duct Sizing table in this manual Accoustic insulation may be used inside the ducts near the unit to dampen any air nois
9. biahinicecenediaeudeeudeueusseevendudusdeureke EE Md Page 19 Table 6 Capacity Ratings Heating cc cece cece cee eee eee eee eee e ene e eens enna sense nnn n nans nennen nnn Page 19 Table 7 Capacity Ratings Cooling cccccccec ccc eee e eee e neces enna eee nn nnne nnne nnne nan nnnnnnnnnnnnnnnnnn Page 20 Table 8 Heat Pump Electrical Information 208 230 1 60 cccecceeeeeeee eens eee eeeeenaeenasenaeenaeenens Page 20 Table 9 Plenum Heater Electrical Information oooocooccccccccnnccnncancnnanancrnnaranononannrnnrnnnnnrennnannnnas Page 20 DIAGRAMS Dimensions Vvertical 14 Page 2 Dimensions Honzontal 5 iii a A EEUU Page 23 DRAWINGS 001507CDG Typical AHW Series Duct and Condensate Connections Modular Case Page 9 001853SCH AHW 1 DE Schematic Diagram ooococccccccncccnononoccnccnnccanncnannnnnnnrnnnrnnnarennananas Page 21 001480MAN 01 Page 4 1 Sep 2015 Installation Information UNIT DESCRIPTION The AHW Series unit is a high efficiency hydronic air han dler that can be used to provide air heating or cooling from a hydronic source such as a water to water heat pump An electrically commutated ECM fan with several speed options is standard The motor has a soft start function for im proved efficiency and reduced wear UNPACKING THE UNIT When the air handler reaches its destination it should be unpacked to determine
10. 0 10 0 45 300 13 3 56 400 16 5 79 000 23 2 0 9 1800 850 13 800 4 0 25 500 7 5 37 400 11 0 49 500 14 5 61 700 18 1 86 500 25 3 6 2 1000 472 10 000 2 9 18 400 5 4 27 000 7 9 35 600 10 4 44 300 13 0 61 800 18 1 4 0 252 2100 991 14 700 4 3 27 300 8 0 40 000 11 7 52 900 15 5 66 000 19 3 92 500 27 1 1500 708 14 400 4 2 26 600 7 8 38 800 11 4 51 200 15 0 63 600 18 6 88 500 25 9 1 8 2400 1133 15 500 4 5 28 700 8 4 42 100 12 3 55 700 16 3 69 400 20 3 97 300 28 5 1000 472 10 800 3 2 20 000 5 9 29 100 8 5 38 400 11 2 47 600 14 0 66 100 19 4 1200 566 12 400 3 6 22 800 6 7 33 300 9 8 43 900 12 9 54 600 16 0 75 800 22 2 6 0 379 1800 850 16 100 4 7 29 700 8 7 43 400 12 7 57 300 16 8 71 300 20 9 99 200 29 1 12 4 2100 991 17 500 5 1 32 400 9 5 47 400 13 9 62 500 18 3 77 800 22 8 108 400 31 8 2400 1133 18 800 5 5 34 700 10 2 50 800 14 9 67 000 19 6 83 400 24 4 116 300 34 1 1000 472 11 200 3 3 20 600 6 1 30 100 8 8 39 500 11 6 49 000 14 4 68 000 19 9 8 0 505 1800 850 17 300 5 1 31 900 9 3 46 500 13 6 61 200 17 9 75 900 22 2 105 500 30 9 20 0 2100 991 19 100 5 6 35 200 10 3 51 300 15 0 67 500 19 8 83 800 24
11. 0 cfm for each floor grill 1 2 All leads to the grills should be 6 in diameter 28sq in each 3 The main hot air trunks should be at least 7596 of the square surface area of leads being fed at any given point 4 Return air grills should have a minimum of the same total square surface area as the total of the supply grills 5 The square surface area of the return trunks should equal the square surface area of the grills being handled at any given point along the trunk Itis VERY IMPORTANT that all turns in both the supply trunks and the return trunks be made with TURNING RADII Air act like a fluid and just like water pressure drop is increased when air is forced to change direction rapidly around a sharp or irregular corner It is recommended that flexible collars be used to connect the main trunks to the heat pump This helps prevent any vibrations from travelling down the ductwork If a plenum heater is in stalled the collar should be at least 12 away from the heater elements The first 5 10 feet of the main supply trunks should be insulat ed with acoustical duct insulation to further inhibit any noise from the unit from travelling down the ductwork If a plenum heater is installed insulation should not be placed within 12 of the heater elements Drawing 001507CDG shows a typical installation 1 Sep 2015 Page 7 DUCT SYSTEMS GRILL LAYOUT Most forced air heating systems in homes have the floor grills pla
12. 6 116 600 34 2 2400 1133 20 700 6 1 38 100 11 1 55 600 16 3 73 100 21 4 90 800 26 6 126 300 37 0 non geothermal application 1200 566 13 000 3 8 23 800 7 0 34 700 10 2 45 700 13 4 56 600 16 6 78 600 23 0 1500 708 15 300 4 5 28 100 8 2 41 000 12 0 53 900 15 8 66 900 19 6 92 900 27 2 2 9 1 Sep 2015 Page 19 001480MAN 01 CAPACITY RATINGS continued Table 7 Capacity Ratings Cooling Cooling Capacity BTU hr kW at EWT EAT 80 6 F 27 C RH 46 Pressure Drop USGPM PSI 1000 472 24 500 7 2 23 300 6 8 21 200 6 2 21 200 6 2 18 100 5 3 18 100 5 3 1200 566 25 900 7 6 25 900 7 6 22 500 6 6 22 500 6 6 19 300 5 7 19 300 5 7 1500 708 27 500 8 1 27 500 8 1 24 000 7 0 24 000 7 0 20 700 6 1 20 700 6 1 0 3 0 126 2 1 1800 850 28 700 8 4 28 700 8 4 25 200 7 4 25 200 7 4 21 600 6 3 21 600 6 3 2100 991 29 600 8 7 29 600 8 7 26 000 7 6 26 000 7 6 22 400 6 6 22 400 6 6 2400 1133 30 400 8 9 30 400 8 9 26 700 7 8 26 700 7 8 22 900 6 7 22 900 6 7 23 600 6 9 1200 566 39 300 11 5 31 600 9 3 33 600 9 8 29 300 8 6 28 000 8 2 0252 2100 991 48 100 14 1 46 200 13 5 41 900 12 3 41 900 12 3 36 000 10 6 1000 472 43 600 12 8
13. CTIONS The air handler has a concentric 1 093 0 875 knockout for power supply connection to the electrical box as well as one spare knockout There are two 1 2 openings with plastic grom mets grommet hole is 3 8 in the upper section of the electrical box one for the thermostat connections and one for the option al plenum heater connections A schematic diagram SCH can be found inside the electrical box cover of the unit as well as in the Model Specific Information section of this manual The Electrical Tables in the Model Spe cific Information section and the SCH diagram contain infor mation about the size of wire for the connections as well as the recommended breaker size NOTE 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 Electrical code requirements shall supersede the recommendations of this manual 1 Sep 2015 Page 5 Connect 208VAC or 230VAC single phase power to the POWER terminal strip in the left side of the electrical box If using 208VAC the control transformer wiring must be changed as indicated in the CONTROL TRANSFORMER section of this manual Refer to TABLE 8 in the ELECTRICAL TABLES sec tion of this manual for recommended wire and breaker sizes The Electrical Diagram is located in the Model Specific Infor mation section of this manual THERMOSTAT REQUIREMENTS
14. MARITIME GEOTHERMAL tro Installation and Service Manual AHW Series Hydronic Air Handler Model Size 65 Hydronic Air Handler Fan Coil Unit 224 CERTIFIED www ahridirectory org Maritime Geothermal Ltd Email info nordicghp com P O Box 255 Web www nordicghp com Petitcodiac N B E4Z 6H4 Document Number 001480MAN 01 Ph 506 756 8135 ISSUE 04 DATE 1 Sep 2015 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 AHW 65 1 SDETV xx AHW Hydronic Air Handler 01 02 etc Nominal Size 4
15. Schematic Diagram 208 230 1 60 220 1 50 ECM Fan ELECTRICAL BOX PLENUM HEATER OPERATION AIRFLOW SELECTION Divide E el a n NOTE This SCH document does not necessarily Connect AR to AR or AR with dry j iti contacts to adjust the airflow Refer The fan will operate automatically a jumper wire from Pep component porlana to Airflow Table for valdes from the W2 signal AR to AR Set jumper wire as per Airflow Select table to ZONE VALVE CONNECTION obtain desired airflow A 24VAC zone valve may be connected to the V and V1 terminals Plenum Heat Connections 24VAC Wiring To Thermostat Use 18 5 conductor to connect this unit to the thermostat C 24VAC Common R 24VAC Hot G Fan Recirculation No Connect Fan Auxilliary Emergency Zone Valve Connections Airflow Connections Thermostat A Connections _ Grounded to Fan Housing Thermostat Wiring 24VAC IMPORTANT NOTE FOR 208 1 60 POWER OG Ensure red wire is D 40 8 24VAC connected to 208 RED Field Wiring pe TT EERIE terminal of transformer 208 230VAC m JC LOW Air Handler Electrical Service Requirements 208 230VAC Single Phase 60Hz 208 230 1 60 Model Min Circuit Min Wire TD Fuse or Size Ampacity Gauge Breaker 65 11 1 14 3 15 _ 170 Plantation Rd MARITIME GEOTHERMAL UD ere Approved By Drawing Name Chris Geddes AHW 1 DE Schema
16. The AHW Series unit is compatible with a single stage thermostat or two stage thermostat if a plenum heater is in stalled The schematic diagram on the electrical box cover pro vides a description of the signal connections as does TABLE 1 PLUMBING CONNECTIONS The unit is equipped with 1 brass FPT fittings for water line connections The ports are labeled INDOOR IN and IN DOOR OUT Connect the IN port to the supply header and con nect the OUT port to the return header Connect to the unit us ing standard plumbing techniques TABLE 1 Control Signal Description Airflow do LL Zone Valve Common ORBE Plenum Deuter Dry Contact optional ZONE VALVE AND OR CIRCULATOR If there are multiple zones in the system then it is recom mended that a zone valve be placed in the OUT line close to the unit A 24VAC powered zone valve may be connected to the V and V1 terminals on the terminal strip for automatic operation If individual zone circulators are used instead of or in com bination with zone valves a 115VAC or 230VAC circulator may be connected to the Zone Circulator terminal strip in the unit if applicable for automatic operation Ground may be connected to the ground terminal of the POWER terminal strip 001480MAN 01 AIRFLOW SELECTION The air flow can be set to six 6 different nominal levels by via different combinations of the tap position of the Air Flow Se lect board and the jumper configuration of the AR termi
17. ace transformer 230VAC input present Faulty wiring between heat 24VAC is not present across C and Correct the wiring pump and thermostat R Ru of the thermostat Faulty Thermostat 24VAC is present across C and R Replace thermostat Ru of the thermostat but thermo stat has no display THERMOSTAT TROUBLESHOOTING Fault Possible Cause Verification Recommended Action No Y signal to Incorrect thermostat set Thermostat does not indicate a call Correct the setup unit after 6 up for heat No 24VAC signal present minutes across C and Stage 1 of the thermo stat Faulty thermostat to unit 24VAC signal present across Stage Correct or replace wiring wiring 1 and C of the thermostat but not present across Y and C of the termi nal strip Faulty thermostat No 24VAC between Stage 1 and C Replace thermostat of the thermostat when a call is indi cated on the thermostat 1 Sep 2015 Page 15 001480MAN 01 Recommended Action FAN TROUBLESHOOTING Low Airflow Fan operating on wrong Stage speed Fan not operat ing or operating intermittently 001480MAN 01 Possible Cause Dirty air filter Verification Inspect Replace Dirty air coil Poor Ductwork Air flow selected on Tap Board is too low Inspect Measure delta T between supply and return ducts at the unit it in heating mode it should not be above 30 F 17 C Check selection on Air Flow Tap Board Clean
18. art or component fails to conform to this warranty and the alleged defects were not caused by accident misuse neglect alteration improper installation repair or improper testing MARITIME GEOTHERMAL LTD will not be responsible for any consequential damages or labour costs incurred In additional MARITIME GEOTHERMAL LTD will not be responsible for the cost of replacement parts purchased from a third party
19. ced around the perimeter of the room to be heated Supply grills should be placed under a window when possible to help prevent condensation on the window As mentioned in the pre vious sub section supply grill leads should be 6 in diameter 28 sq in each to allow 100cfm of air flow In a typical new construction there should be one supply grill for every 100sq ft of area in the room When rooms require more than one grill they should be placed in a manner that pro motes even heat distribution such as one at each end of the room It is always a good idea to place a damper in each grill supply or place adjustable grills so that any imbalances in the heat distribution can be corrected The total number of supply grills available is based on the unit nominal airflow Once the airflow value is selected refer to Ta ble 2 divide this value by 100 to obtain the recommended number of supply grills The airflow Return grills should be mounted on the floor At minimum they should be the same size as the supply grill it is highly recommended that they be 25 to 50 larger than the total supply They should be placed opposite the supply grills when possible to ensure distribution across the room For rooms requiring more than one supply grill it may be possible to use one larger return grill if it can be centrally positioned opposite of the supply grills however it is preferred to have one return for each supply to maximize heat distribution a
20. cross the room THERMOSTAT LOCATION The thermostat should be centrally located within the space It should be placed away from any supply grills and should not be positioned directly above a return grill Most installations have the thermostat located in a hallway or in the inner wall of the living room It should be noted that most homes do not have any supply ducts in the hallway This can lead to a tem perature lag at the thermostat if there is very little air movement in the hallway causing the home to be warmer than indicated by the thermostat 001480MAN 01 PLENUM HEATER OPTIONAL For installations that do not already have a backup heat source such as electric baseboard wood stove propane etc it is recommended that a plenum heater be installed This pro vides two functions The first function of the plenum heater is to act as an auxiliary heat source As such it will provide additional heat on extremely cold days if the heat pump is unable to bring the home tempera ture up quickly enough eliminating any discomfort to the home owner The second function of the plenum heater is to provide emer gency heat should a problem occur that causes the heat pump to be locked out This can be engaged by setting the thermostat to emergency heat allowing the plenum heater to function while preventing the heat pump from operating Should the heat pump fail while the home is vacant the auxiliary function of the thermostat will main
21. e that may be present Ensure there is no insulation within 12 of the plenum heater if installed 2 thick styrofoam Floor Drain Minimum decline of 1 8 per foot 1 8 4 12 Optional Water Valve Recommended if more than 1 zone in the system 18ga wire Connect to V Connect to V1 Line e WS Line et ZONE RETURN HEADER n NS ZONE SUPPLY HEADER D B Dat 170 Plantation Rd AHH ee aame GEOTHERMAL tro zem A cll ld pmewerB y Pa 000 LLL LLL d Drawing Name Typical AHW Series 00 7 000 Duct and Condensate Connections Modular Case 01 Initial Release c GEDDES GEDDES Size Drawing Number REV SHEET Eco 4 MPLBY APVDBY pare Per A 001507CDG 01 1 of 1 1 Sep 2015 Page 9 001480MAN 01 TABLE 4 Duct Sizing Guide external static of 0 20 H20 Diameter in X X Co Co 4x8 4 x 11 5 x 12 5 x 12 277 6 x 12 6 x 12 7x13 1 o MK ME MM EN EN NM 113 7x18 8 6 7 x 18 8 x 16 680 9 x 19 9 x 19 10 x 22 10 x 22 1750 8 x 40 10 x 30 8 x 40 10 x 30 314 12 x 30 12 x 30 14 x 30 14 x 30 16 x 32 16 x 32 18 x 32 18x38 20x34 18x38 20x34 7250 707 oO e 22 x 38 7800 707 30 22 x 38 8500 804 24 x 38 804 24 x 38 9800 908 4 oO 25 x 40 10900 908 25 x 40 28 x 40 30 x 36 32 x 38 34 x 40 001480MAN 01 6 3 5 6 3 5 6 5
22. formation This section provides general information particular to each model For complete specifications please see the specifications document for the desired model SHIPPING INFORMATION Table 5 Shipping Information gt o 65 Vertical 197 89 33 84 30 76 48 122 65 Horizontal 197 89 33 84 30 76 48 122 CAPACITY RATINGS The tables below depict the results of capacity rating tests done at the operating conditions indicated in the tables Table 6 Capacity Ratings Heating EAT 68 F 20 C RH 52 l Water Airflow Heating Capacity BTU hr kW at EWT USGPM ops na ri STO E NN IA CI NN S NU QU T A PP 1000 472 7 400 2 2 13 800 4 0 20 300 6 0 27 000 7 9 33 800 9 9 47 700 14 0 1200 566 7 900 2 3 14 700 4 3 21 700 6 4 28 800 8 5 36 100 10 6 51 000 15 0 2 1500 708 8 400 2 5 15 700 4 6 23 200 6 8 30 800 9 0 38 600 11 3 54 500 16 0 0 126 l 1800 850 8 800 2 6 16 400 4 8 24 200 7 1 32 200 9 4 40 300 11 8 57 000 16 7 2 0 2100 991 9 100 2 7 16 900 5 0 25 000 7 3 33 200 9 7 41 600 12 2 58 700 17 2 2400 1133 9 300 2 7 17 300 5 1 25 600 7 5 34 000 10 0 42 600 12 5 60 100 17 6 3 3 3 3 1200 566 11 200 3 3 20 700 6 1 30 300 8 9 40 000 11 7 49 800 14 6 69 600 20 4 1500 708 12 600 3 7 23 400 6 9 34 30
23. ication Verify disconnect switch is in the ON position At plenum heater disconnect box if installed voltmeter shows voltage on the line side but not on the load side Check if breaker is tripped Measuring L1 to ground and L2 to ground both yield 115VAC but L1 to L2 yields OVAC Verify that the thermostat is indicating that auxiliary or emergency heat should be on Thermostat doesn t indicate a call for auxiliary or emergency when it should Thermostat indicates auxiliary or emergency but no 24VAC signal pre sent across C and the auxiliary and or emergency pin at the thermostat 24VAC signal is present across C and the auxiliary and or emergency pin at the thermostat but no 24VAC signal is present across W2 and C at the heat pump terminal strip Voltmeter does not show 24VAC across transformer secondary wind ing Transformer tested OK in previous step 24VAC present across C and ground at the plenum heater but not across ground of the plenum heater and of the heat pump terminal strip Recommended Action Determine why the disconnect switch was opened if all is OK close the switch Reset breaker or replace fuse at plenum heater disconnect box Replace fuse with proper size and type Time delay type D Correct wiring Set thermostat to engage auxilia ry or emergency heat note some thermostats require a jumper be tween auxiliary and emergency Check the thermostat manual Rep
24. if any damage has occurred during shipment Any visible damage should be noted on the carrier s freight bill and a suitable claim filed at once The air handler 5 well constructed and every effort has been made to ensure that will arrive intact however it is in the customer s best interest to examine the unit thoroughly when it arrives OPTIMUM PLACEMENT The air handler should be centrally located in the home with respect to the conditioned space in order to provide even air distribution This design provides the utmost in economy and comfort and usually can be accomplished in harmony with the design of the home A heating system cannot be expected to produce an even warmth throughout the household when it 5 located at one end of the structure and the warm air is transmitted with uninsulated metal ductwork If possible the access panels should remain clear of obstruction for a distance of two feet to facilitate servicing and general maintenance Raising the air handler 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 air handler be placed on a piece of 2 thick styrofoam The styrofoam will smooth out any irregularities in the cement floor The air handler comes equipped with an air filter rack which can be installed with the removable end where the filter is in serted on either side to facilitate changing the filter ELECTRICAL CONNE
25. ime 3 Duct Return temperature Duct Supply Out temperature Duct Delta T Indoor Loop In temperature Indoor Loop Out temperature Indoor Delta T aS oS 4 Adjust the thermostat setpoint to the desired room temperature if possible otherwise set it just low enough to allow the unit to run ie 1 F 0 5 C less than room temperature and let the unit run through a cycle Ensure the unit shuts off at the end of the cycle fan and zone valve if installed Final Inspection 1 Turn the power off to the unit and plenum heater if installed and remove all test equipment 2 Install the electrical box cover and the access panel on the unit 3 Do a final check for leaks in the ground water ground loop system and ensure the area is clean 4 Turn the power on to the unit and the plenum heater if installed Set the thermostat to the final settings Startup Record 1 The installer shall sign and date the Startup Record and have the homeowner sign as well The installer shall leave the Startup Record with the homeowner retain a copy for filing and send a copy to Maritime Geothermal Ltd for warranty registration 001480MAN 01 Page 12 1 Sep 2015 Startup Record AHW Series Installation Site Installer City A Company Province Model Country Serial HomeownerNeme romeo Check boxes unless asked to record data Circle data units PRE START INSPECTION Ductwork is completed dampers diverters are adjusted
26. l signal harness insert probes in connector where wire is inserted do not unplug the connector Circulation Grey pin 15 Stage 1 Yellow Black pin14 Stage 2 Violet pin 2 If proper signal isn t present re place Fan Control Signal Har ness If proper signal is present replace fan motor head Repair any loose connections If proper signal isn t present re place Fan Control Signal Har ness If proper signal is present replace fan motor head Faulty Fan Power Har ness or faulty motor Insert the tips of the voltmeter probes into the back of the connect or at the fan to measure the voltage across the red and black wires val ue should be 230VAC Page 16 Replace Power Harness if 230VAC is not present replace motor if 230VAC is present 1 Sep 2015 PLENUM HEATER TROUBLE SHOOTING No 230VAC across plenum heater L1 and 2 No W2 signal at unit terminal strip No 24VAC signal from C to ground at the plenum heater control connector No 24VAC signal from 1 to ground at the plenum heater control connector 1 Sep 2015 Possible Cause Disconnect switch open if installed Fuse blown Breaker Tripped Same Line to L1 and L2 No call for auxiliary or emergency heat from ther mostat Faulty thermostat Faulty thermostat Faulty thermostat wiring Plenum Heater transform er is burned out Plenum heater control board is faulty Faulty wiring Verif
27. lace thermostat Replace thermostat Correct wiring Replace transformer Replace control board Correct wiring Faulty wiring If previous step tested OK 24VAC is present across ground of the plenum heart and 1 of the heat pump terminal strip but not across ground of the plenum heater and 1 of the plenum heater Page 17 Correct wiring 001480MAN 01 PLENUM HEATER TROUBLE SHOOTING Fault Possible Cause Verification Recommended Action No 24VAC signal Faulty Plenum Heater 24VAC is present across pin 1 and Replace relay from 1 to ground Relay in heat pump pin 3 of the relay 24VAC is present at the plenum from heat pump terminal strip to heater control plenum heater ground but not from connector heat pump terminal strip 1 to plenum heater ground Thermal overload Fan not operating See Fan Not Operating section Correct problem Reset thermal is tripped overload Faulty overload Reset thermal overload Replace if faulty The Dole flow control is a simple self cleaning device designed to deliver a constant Multimeter volume of water from any outlet whether the pressure is 15 psig or as high as 125 psi The Voltmeter controlling mechanism consists of a flexible Amprobe orifice that varies its area inversely with In line Flowmeter pressure so that a constant flow is maintained 001480MAN 01 Page 18 1 Sep 2015 Model Specific In
28. n the top section of all three copies or one copy if photocopies can be made after the startup has been completed PRE START INSPECTION Ductwork 1 Verify that all ductwork has been completed and is firmly attached to the unit Verify that any dampers or diverters are properly set for operation of the heat pump 2 Verify that all registers are open and clear of any objects that would restrict the airflow 3 Verify that a new air filter is installed and the cover is secured 4 Verify the condensate drain is connected properly vented and free of debris 5 If a plenum heater has been installed verify that it is securely fastened Hydronic Loop 1 Verify that all shutoff valves are fully open and there are no restrictions in the piping from the zone headers to the unit and that full flow is available to the unit 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 if applicable Record the type of antifreeze and the mixture value on the startup sheet circle 9o Vol or Weight 4 Record the static loop pressure on the startup sheet Electrical 1 Ensure the power to the unit is off Ensure the power to the plenum heater is off if equipped 2 Verify all high voltage connections Ensure that there are no stray wire st
29. nals lo cated in the electrical box The airflow values are indicated in TABLE 2 Units are shipped with the tap on the LOW position and a jumper wire from AR to AR providing a default airflow value of 1000cfm select the desired tap during installation Set the airflow according to the desired capacity from the capacity tables in the Model Specific Information section of this manu al TABLE 2 Airflow Selections AIRFLOW AIRFLOW SELECT AR JUMPER cfm Lis TAP CONFIGURATION 1000 472 L AR to AR L 1800 850 2100 991 max 2400 1133 MAX ARtoAR 1200 566 OW 1500 708 MED MAX none MAX FAN MOTOR The unit is equipped with a direct drive ECM fan motor for maximum efficiency The motor features a soft start which fur ther improves efficiency by eliminating inrush current and pro vides a smooth quiet ramp up to speed The motor will main tain the programmed air flow up to a maximum external static value of 0 70 of water for the airflows indicated in TABLE 2 CONTROL TRANSFORMER The low voltage controls are powered by a 40VA class transformer The transformer is impedance protected if shorted out and the impedance protection is activated the transformer will need to be replaced NOTE For 208 230VAC 1 60 units if connecting to 208VAC power supply move the red wire connected to the 240 termi nal of the transformer to the 208 terminal of the transform er 001480MAN 01 Page 6 1
30. ostat Location Page 7 Plenum Heater Optional 2 Page 8 Condensate O Page 8 Duct A A UR DN Ed II Page 10 STARTUP 0 Page 11 Pre start Inspection iets ere ate wa we oie emmebaee tesa wena Page 11 Startup css Page 12 a o A Page 13 GENERAL MAINTENANCE 525295 8932 erise toscanini iE E LN UNITED NEU PAGE 14 IROUBEESHOOITING GUIDE arepas a ii toca PAGE 15 MODEL SPECIFIC INFORMATION 2i255dpus ia bou coins er uFokhg prr Ease uar raoU Edad PeiUDorrbbnixs DEAN Prr ERU EIU RR ricotta PAGE 19 Shipping Information Page 9 AR 6 Ratings An Page 9 Electrical 1 ario Page 0 66 tacto da o Page 1 Dimensions Vertical 0 0 d nrrR EoErEncP RE NUS eN raf E Page 22 Dimensions Horizontal SDESH 4 4240 Page 23 WARRANTY INFORMATION 2 2000 KE DREPEAN ERE EAE das PAGE 24 1 Sep 2015 Page 3 001480MAN 01 Tables Diagrams and Drawings TABLES Table 1 Control Signal Description oocococcccccconcconccnnccnnncnnccancrnnn cnn cnn rar rnnr enne nnne nnne nnne nnns Page 5 Table 2 Ailow Page 6 Tabl e S Plenum Heater SIZING suussa aisina a aaa a a a aG la Page 8 Table 4 061 SIZING GUE saas E EE E seats Page 10 Table 5 Shipping Information sesievescctta cscs vecduagee eset eyneutned
31. ould slowly ramp up to speed after the time delay of the thermostat expires if applicable and the zone valve if installed will open to allow water flow to the unit allow 10 30 seconds for the valve to open 3 Record the following after 10 minutes of runtime Duct Return temperature poke a small hole in the flex collar and insert probe in airstream Duct Supply temperature poke a small hole in the flex collar and insert probe in airstream Duct Delta T ideally between 22 32 F 12 18 C but depends significantly on entering liquid temperature Indoor Loop In temperature Indoor Loop Out temperature 6 Indoor Delta T 4 Adjust the thermostat setpoint to the desired room temperature and let the unit run through a cycle Ensure the unit shuts off at the end of the cycle fan and zone valve if installed 6 If a plenum heater is installed remove the electrical cover from the plenum heater Place a current clamp meter around one of the supply wires Turn on the power to the plenum heater Adjust the thermostat setpoint to at least 85 F 29 C Verify that the current draw increase as each stage is activated 10kW has 2 stages 15kW has 3 stages and 20kW has 4 stages pios goo s Cooling Mode 1 Ensure the cooling source is operational and the zone supply water has reached the desired temperature 2 Set the thermostat to cooling mode and adjust the setpoint to activate Stage 1 and Stage 2 3 Record the following after 10 minutes of runt
32. p 2015 Page 13 001480MAN 01 General Maintenance GENERAL MAINTENANCE SCHEDULE Air Filter Inspect for dirt Replace if necessary Condensate Drain Inspect for clogs Remove and clean if necessary 001480MAN 01 Page 14 1 Sep 2015 Troubleshooting Guide The following steps are for troubleshooting the geothermal heat pump If the problem is with the plenum heater proceed to that section at the end of the troubleshooting guide STEP 1 Verify that the display is present on the thermostat If it is not proceed to POWER SUPPLY TROUBLE SHOOTING otherwise proceed to STEP 2 STEP 2 If a 24VAC signal does not appear across Y and C of the terminal strip within 6 minutes proceed to the THERMOSTAT TROUBLESHOOTING section otherwise proceed to the FAN TROUBLE SHOOTING section POWER SUPPLY TROUBLESHOOTING Possible Cause Recommended Action 0 No power to the Disconnect switch open Verify disconnect switch is in the ON Determine why the disconnect unit 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 impedance No 24VAC output even though Replace transformer thermostat protection activated 230VAC input present Faulty transformer No 24VAC output even though Repl
33. rands all connections are tight and the ground wire is connected tightly to the ground connector for the heat pump and plenum heater 3 Record the fuse circuit breaker size and wire gauge for the air handler Record the fuse circuit breaker size wire gauge and size of the plenum heater if installed 4 Verify that the control connections to the thermostat and plenum heater if installed and zone valve if installed are properly connected and all control signals are off so that the unit will not start up when the power is turned on 5 Ensure all access panels except the one that provides access to the electrical box are in place 1 Sep 2015 Page 11 001480MAN 01 UNIT STARTUP The unit is now ready to be started The steps below outline the procedure for starting the unit and verifying proper operation of the unit It is recommended that safety glasses be worn during the following procedures Preparation 1 Turn the power on to the hydronic air handler and set the thermostat to OFF Set up the thermostat as per the instructions provided with it so that it will function properly with the air handler 2 Measure the following voltages on the terminal block and record them on the startup sheet L1 L2 Heating Mode 1 Ensure the heating source is operational and the zone supply water has reached the desired temperature 2 Set the thermostat to heating mode and adjust the setpoint to activate Stage 1 and Stage 2 if applicable The fan sh
34. tain the temperature setting of the thermo stat INSTALLATION The air handler comes equipped with an inter nal mounting location for the plenum heater Remove the screws from the cover plate remove the cover plate and place the plenum heater in the hole Secure it in place with the cover plate screws Use the indicated knockouts on the heat pump case for electrical connections When installation is complete check the appropriate box of the label on the air handler door to indicate which size heater was installed Only two control wires are needed to connect the plenum heater to the heat pump terminal strip Refer to the label on the plenum heater or the electrical box diagram on the inside of the electrical box cover of the compressor unit for details on the connections The plenum heater requires its own separate power sup ply TABLE 3 shows the available plenum heater sizes along with the minimum airflow requirement wire size and breaker size needed to provide power to the plenum heater It is rec ommended that a plenum heater large enough to meet the heat load of the space be selected in order to provide proper backup heating capacity TABLE 3 Plenum Heater Sizing Size Minimum Airflow kW Cfm L s 1000 472 905 7 1200 566 1800 850 CONDENSATE DRAIN 001480MAN 01 Page 8 The unit comes equipped with a 3 4 PVC socket fitting female labeled Condensate Drain This drain
35. tic Diagram Approved By Drawing Rev SHEET 01 1 of 1 Date 10 JUN 2014 REV ECO IMPL BY APVD BY Size A Drawing Number 001853SCH 1 Sep 2015 Page 21 001480MAN 01 DIMENSIONS Vertical SDETV ZONE LOOP OUT 1 FFT ZONE LOOP IN 1 FET 2 3 4 Left Side View Back View 001480MAN 01 Page 22 1 Sep 2015 DIMENSIONS Horizontal SDESH 1 THERMOSTAT WIRE ELECTRICAL SERVICE 23 3 4 19 5 8 ZONE LOOP OUT 1 FFT 18 1 8 ZONE LOOP IN 17 FFT m COND DRAIN NOT PLENUM HEATER INTERNALLY TRAPPED ELECTRICAL SERVICE 3 4 PVC INS 5 8 44 13 4 Front View 1 7 8 Back View 1 REMOVABLE Right Side View 1 Sep 2015 Page 23 001480MAN 01 LIMITED WARRANTY MARITIME GEOTHERMAL LTD warrants that its hydronic air handlers shall be free from defects in materials and workmanship for a period of ONE 1 YEAR after the date of installation or for a period of ONE 1 YEAR AND SIXTY 60 DAYS after the date of shipment whichever occurs first This warranty covers all internal components of the heat pump MARITIME GEOTHERMAL LTD shall at its option repair or replace any part covered by this warranty Defective parts shall be returned to MARITIME GEOTHERMAL LTD transportation charges prepaid Replacement or repaired parts and components are warranted only for the remaining portion of the original warranty period
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