ENGINEERING SPECIFICATIONS W-150-H-P-*D-PP Vertical Dual Refrigeration Circuit Scroll Compressors R410a Refrigerant Nominal Size 12 Ton Non-Reversing (Heating OR Cooling) Commercial Hydronic Geothermal Heat Pump Maritime Geothermal Ltd. PO Box 2555 Petitcodiac, NB E4Z 6H4 Ph. (506) 756-8135 Email: info@nordicghp.com Web: www.nordicghp.com Document Number: 002024SPC-01 REV 01 Date: 28-Sep-2015
MODEL NOMENCLATURE W 150 H P 2D PP xx Series: W = liquid to water (hydronic) Revision: 01, 02 etc. Nominal Size: 150 = 12 Ton Indoor Loop Exchanger: P = Brazed Plate Functions: H = Heating Outdoor Loop Exchanger: P = Brazed Plate Refrigerant: P = R410a Compressor: D = Dual Scroll Voltage Code: 1 = 230-1-60 2 = 208-3-60 4 = 460-3-60 5 = 575-3-60 The models and revisions covered by this document are listed in the table below. MODEL REVISION W-150-H-P-1D-PP 01 W-150-H-P-2D-PP 01 W-150-H-P-4D-PP 01 W-150-H-P-5D-PP 01 Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification data at any time without prior notice. 28-Sep-2015 Page 2 002024SPC-01
DESIGN FEATURES LIST The geothermal heat pump described in this specification document has the following features: ETL/TUV listed for electrical certification 11ga heavy duty stand alone frame with slots for forklift access Rubber mounting feet (optional spring mount kit for floors that have flex) Insulated heat exchangers and piping Dual refrigeration circuit design; each circuit operates independently Copeland scroll compressors with crankcase heaters Suction line accumulator (each circuit) Liquid line solid core filter-dryer (each circuit) Liquid line sight glass (each circuit) Electronic Expansion Valve (EEV) (each circuit) Refrigeration service ports for each refrigeration circuit (1/4 Schrader) 316 stainless steel brazed plate heat exchangers dual refrigerant circuits with common water circuit 2 316 stainless piping with Victaulic connections for the outdoor and indoor loop ports Phase protectors High and low pressure sensors (each circuit) Suction line temperature sensor (each circuit) Manual reset high pressure control (each circuit) Flow Switch for outdoor loop Temperature sensor and P/T port on all four port connections (Outdoor In, Outdoor Out, Indoor In and Indoor Out) Advanced control board with BACNet interface for remote operation and data access including all sensor data and alarm conditions, PWM outputs (or 0-10VDC), configurable analog inputs (0-10VDC or 4-20mA) with on board 5VDC, 12VDC or 24VDC power supplies. USB port for complete data access including real-time charting, data logging, and diagnostic functionality with manual override operation 2 x 16 LCD display for control and data access; unit may be configured for stand alone operation (requires optional temperature sensor(s) Random start on power up (0 to 2 minutes) Dry contacts for external pump control (24VAC 5A MAX) Electrical box layout and schematic diagrams Installation and service manual OPTIONAL EQUIPMENT The following is a list of optional equipment that may be ordered with the geothermal heat pump: 16ga satin galvanized acoustically insulated (1 thick) enclosure with powder coat finish with seven removable panels offers complete 360 degree access for servicing Spring mount foot kit, for mounting where floor has flex Temperature sensor(s) for stand alone operation configuration 2 solenoid water valve (24VAC) 28-Sep-2015 Page 3 002024SPC-01
DESIGN FEATURES Dual refrigeration circuit design allows independent operation of each circuit: Circuit #1: Bottom Compressor Circuit #2: Top Compressor High efficiency 316SS brazed plate heat exchangers 2 316SS water line ports with Victaulic connections Electronic Expansion Valves (EEV) Copeland scroll compressors with crankcase heaters Refrigerant access ports Suction line accumulators Sight glasses Heavy duty welded 11ga frame for rigidity Solid core filter-dryers Temperature sensor and P/T port on each water line port. Flow switch on outdoor loop. Frame design allows unit to be picked up with forklift from either side or either end Height clearance accommodates pallet jack Rubber mounting feet standard. Optional spring mounting feet available. Suitable for open or closed loop applications. 28-Sep-2015 Page 4 002024SPC-01
DESIGN FEATURES continued OPTIONAL ENSLOSURE KIT (A-510) Heavy duty enclosure constructed of 16ga satin galvanized steel with powder coat finish Enclosure completely insulated with 1 acoustic insulation Seven removable access panels for complete 360 degree servicing 316SS ports with 2 Victaulic connections 28-Sep-2015 Page 5 002024SPC-01
DIMENSIONS - Without Enclosure 28-Sep-2015 Page 6 002024SPC-01
DIMENSIONS - With Enclosure 28-Sep-2015 Page 7 002024SPC-01
ELECTRICAL BOX LAYOUT 460-3-60 and 575-3-60 17. compressor contactors 18. circulator control relay 19. control transformer 21. circulator terminal strip 22. ground terminals 30. fuse holder 31. transformer primary fuse 32. power block 33. phase protection modules 35. transformer secondary fuse 36. fuse holder 38. control board 39. display board / user interface 41. compressor current sensors ELECTRICAL BOX LAYOUT 208-3-60 17. compressor contactors 18. circulator control relay 19. control transformer 21. circulator terminal strip 22. ground terminals 30. power block 31. phase protection modules 34. control board 35. display board / user interface 37. compressor current sensors 28-Sep-2015 Page 8 002024SPC-01
ELECTRICAL BOX LAYOUT 230-1-60 17. compressor contactors 18. circulator control relay 19. run capacitors 20. control transformer 22. circulator terminal strip 23. ground terminals 31. power block 33. control board 34. display board / user interface 36. compressor current sensors 28-Sep-2015 Page 9 002024SPC-01
Nomenclature Identifier ELECTRICAL SPECIFICATIONS Heat Pump Electrical Information Compressors Maximum Minimum Power Supply FLA MCA (each) Fuse/Breaker Wire Size V-ø-Hz MIN MAX RLA LRA Amps Amps Amps ga 1 230-1-60 187 253 35.7 148 71.9 80.8 100 #4-3 2 208-3-60 187 229 25.0 149 50.9 57.2 80 #6-3 4 460-3-60 414 506 11.8 75 24.1 27.1 30 #10-3 5 575-3-60 518 632 8.6 54 17.7 19.9 20 #10-3 MISCELLANEOUS INFORMATION Refrigerant Charge Unit Weight Refrigerant (per circuit) Type Lbs. kg Lbs. kg 700 318 R410a 8 3.6 28-Sep-2015 Page 10 002024SPC-01
ELECTRICAL DIAGRAM - HIGH VOLTAGE 28-Sep-2015 Page 11 002024SPC-01
ELECTRICAL DIAGRAM - LOW VOLTAGE CONTROLS 28-Sep-2015 Page 12 002024SPC-01
ELECTRICAL DIAGRAMS - ELECTRICAL BOX LAYOUT 28-Sep-2015 Page 13 002024SPC-01
REFRIGERATION CIRCUIT DIAGRAM 28-Sep-2015 Page 14 002024SPC-01
STANDARD CAPACITY RATINGS The tables below depict the results of standard capacity rating tests according to C13256-2 standards. C13256-2 is identical to ISO13256-2. EWT 104 F (40 C) Model Nominal Size Standard Capacity Ratings - Ground Loop Heating* Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop Indoor Pressure Drop Input Energy Capacity 60Hz ELT 32 F (0 C) Tons USGPM L/s PSI kpa PSI kpa Watts BTU/Hr kw W/W 150 12 36 2.3 6.7 46.2 3.4 23.4 9546 108,236 32 3.32 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid COP H EWT 104 F (40 C) Model Nominal Size Standard Capacity Ratings - Ground Water Heating Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop Indoor Pressure Drop Input Energy Capacity 60Hz ELT 50 F (10 C) Tons USGPM L/s PSI kpa PSI kpa Watts BTU/Hr kw W/W 150 12 36 2.3 4.5 31.0 3.4 23.4 9928 148,742 44 4.39 COP H EWT 53.6 F (12 C) Model Nominal Size Standard Capacity Ratings - Ground Loop Cooling* Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop Indoor Pressure Drop Input Energy 60Hz ELT 77 F (25 C) Capacity COP C EER Tons USGPM L/s PSI kpa PSI kpa Watts BTU/Hr kw W/W BTUHr/W 150 12 36 2.3 5.6 38.6 3.6 24.8 8145 124,189 36 4.47 15.2 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid EWT 53.6 F (12 C) Model Nominal Size Standard Capacity Ratings - Ground Water Cooling Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop Indoor Pressure Drop Input Energy ELT 59 F (15 C) Capacity COP C EER Tons USGPM L/s PSI kpa PSI kpa Watts BTU/Hr kw W/W BTUHr/W 150 12 36 2.3 4.5 31.0 3.6 24.8 6379 139,626 41 6.41 21.9 60Hz 28-Sep-2015 Page 15 002024SPC-01
CAPACITY RATINGS Heating W-150-H Nominal 12 Ton R410a 60 Hz Source Data (Outdoor Loop) Power Consumption Sink Data (Indoor Loop) ELT Evap. Temp 15% Methanol by Mass Flow LLT Delta T HAB Effective COPh EWT Cond. Temp. 28-Sep-2015 Page 16 002024SPC-01 Flow Water LWT Delta T Output F F USGPM F F BTU/Hr Watts Amps* W/W F F USGPM F F BTU/Hr C C L/s C C Watts C C L/s C C Watts 25.0 15 36.0 21.0 4.0 66,380 9,417 13.7 3.04 104.0 115 36.0 109.4 5.4 97,680-3.9-9.4 2.27-6.1 2.2 19,449 40.0 46.1 2.27 43.0 3.0 28,620 31.0 20 36.0 26.5 4.5 74,736 9,543 13.8 3.27 104.0 116 36.0 109.9 5.9 106,467-0.6-6.7 2.27-3.0 2.5 21,897 40.0 46.7 2.27 43.3 3.3 31,195 36.0 25 36.0 30.9 5.1 84,309 9,556 13.8 3.56 104.0 116 36.0 110.5 6.5 116,083 2.2-3.9 2.27-0.6 2.8 24,702 40.0 46.7 2.27 43.6 3.6 34,012 41.0 30 36.0 35.3 5.7 94,610 9,686 14.0 3.84 104.0 117 36.0 111.1 7.1 126,828 5.0-1.1 2.27 1.8 3.2 27,720 40.0 47.2 2.27 43.9 3.9 37,160 46.0 35 36.0 40.1 5.9 105,821 9,790 14.3 4.15 104.0 117 36.0 111.7 7.7 138,744 7.8 1.7 2.27 4.5 3.3 31,005 40.0 47.2 2.27 44.3 4.3 40,652 51.0 40 36.0 44.5 6.5 117,758 9,934 14.5 4.46 104.0 118 36.0 112.4 8.4 151,171 10.6 4.4 2.27 6.9 3.6 34,503 40.0 47.8 2.27 44.7 4.7 44,293 57.0 45 36.0 49.8 7.2 130,354 10,012 14.6 4.80 104.0 118 36.0 113.1 9.1 164,033 13.9 7.2 2.27 9.9 4.0 38,194 40.0 47.8 2.27 45.1 5.1 48,061 62.0 50 36.0 54.1 7.9 142,894 10,172 14.8 5.10 104.0 119 36.0 113.8 9.8 177,119 16.7 10.0 2.27 12.3 4.4 41,868 40.0 48.3 2.27 45.5 5.5 51,896 * Multiply by 2.2 for 208VAC, by 0.8 for 575VAC Compressor: ZP67KCE-TFD (460-3-60) Cooling (Unit is Non-Reversing) W-150-H R410a 60 Hz Source Data (Indoor Loop) Power Consumption Sink Data (Outdoor Loop) EWT Evap. Temp Water Flow LWT Delta T HAB Effective Efficiency ELT Cond. Temp. 15% Methanol by Mass Flow LLT Delta T Rejection F F USGPM F F BTU/Hr Watts Amps* COPc F F USGPM F F BTU/Hr C C L/s C C Watts EER C C L/s C C Watts 53.6 37.0 36.0 45.6 8.0 143,595 5,937 10.1 7.1 54 75 36.0 63.5 9.5 162,775 12.0 2.8 2.27 7.6 4.4 42,073 24.2 12 23.9 2.27 17.5 5.3 47,693 53.6 37.2 36.0 45.8 7.8 140,288 6,309 10.4 6.5 58 80 36.0 67.4 9.4 160,738 12.0 2.9 2.27 7.7 4.3 41,104 22.2 14 26.7 2.27 19.7 5.2 47,096 53.6 37.4 36.0 46.0 7.6 136,667 6,684 10.8 6.0 63 85 36.0 72.3 9.3 158,399 12.0 3.0 2.27 7.8 4.2 40,043 20.4 17 29.4 2.27 22.4 5.1 46,410 53.6 37.6 36.0 46.2 7.4 132,750 7,080 11.2 5.5 67 90 36.0 76.1 9.1 155,832 12.0 3.1 2.27 7.9 4.1 38,896 18.8 19 32.2 2.27 24.5 5.1 45,658 53.6 37.8 36.0 46.4 7.2 128,990 7,521 11.7 5.0 72 95 36.0 81.2 9.2 153,503 12.0 3.2 2.27 8.0 4.0 37,794 17.1 22 35.0 2.27 27.3 5.1 44,976 53.6 38.0 36.0 46.7 6.9 124,964 8,055 12.3 4.5 76 100 36.0 85.1 9.1 151,299 12.0 3.3 2.27 8.1 3.9 36,614 15.5 24 37.8 2.27 29.5 5.0 44,330 53.6 38.2 36.0 46.9 6.7 120,962 8,520 12.8 4.2 81 105 36.0 89.9 8.9 148,885 12.0 3.4 2.27 8.3 3.7 35,442 14.2 27 40.6 2.27 32.2 5.0 43,623 53.6 38.4 36.0 47.1 6.5 116,979 9,019 13.4 3.8 85 110 36.0 93.8 8.8 146,605 12.0 3.6 2.27 8.4 3.6 34,275 13.0 29 43.3 2.27 34.3 4.9 42,955 * Multiply by 2.2 for 208VAC, by 0.8 for 575VAC Compressor: ZP67KCE-TFD (460-3-60)
MINIMUM AND MAXIMUM OPERATING TEMPERATURES* Loop Parameter Mode ( F) ( C) Notes Outdoor (Antifreeze) Indoor (Antifreeze) Minimum ELT Heating 26-3 Maximum ELT Heating 80 27 Minimum ELT Cooling 41 5 Flow control valve may be required in Outdoor Loop. Maximum ELT Cooling 113 45 Minimum EWT Heating 43** 6** Flow control valve may be required in Indoor Loop. Maximum EWT Heating 120 49 Minimum EWT Cooling 41 5 Maximum EWT Cooling 80 27 * Values in this table are for rated liquid and water flow values. ** Reduce Indoor Loop flow until value is reached for startup if necessary. Loop Parameter Mode ( F) ( C) Notes Outdoor (Antifreeze) Indoor (Water) Minimum ELT Heating 26-3 Maximum ELT Heating 80 27 Minimum ELT Cooling 46 8 Flow control valve may be required in Outdoor Loop. Maximum ELT Cooling 113 45 Minimum EWT Heating 50** 10** Flow control valve may be required in Indoor Loop. Maximum EWT Heating 120 49 Minimum EWT Cooling 45 7 Maximum EWT Cooling 80 27 * Values in this table are for rated liquid and water flow values. ** Reduce Indoor Loop flow until value is reached for startup if necessary. Loop Parameter Mode ( F) ( C) Notes Outdoor (Water) Indoor (Water) Minimum ELT Heating 43 6 Maximum ELT Heating 80 27 Minimum ELT Cooling 46 8 Flow control valve may be required in Outdoor Loop. Maximum ELT Cooling 113 45 Minimum EWT Heating 50** 10** Flow control valve may be required in Indoor Loop. Maximum EWT Heating 120 49 Minimum EWT Cooling 45 7 Maximum EWT Cooling 80 27 * Values in this table are for rated liquid and water flow values. ** Reduce Indoor Loop flow until value is reached for startup if necessary. Loop Parameter Mode ( F) ( C) Notes Outdoor (Water) Indoor (Antifreeze) Minimum ELT Heating 43 6 Maximum ELT Heating 80 27 Minimum ELT Cooling 46 8 Flow control valve may be required in Outdoor Loop. Maximum ELT Cooling 113 45 Minimum EWT Heating 43** 6** Flow control valve may be required in Indoor Loop. Maximum EWT Heating 120 49 Minimum EWT Cooling 41 5 Maximum EWT Cooling 80 27 * Values in this table are for rated liquid and water flow values. ** Reduce Indoor Loop flow until value is reached for startup if necessary. 28-Sep-2015 Page 17 002024SPC-01
BACNet SPECIFICATIONS The BACNet interface is an MS/TP connection via RS-485 twisted pair. The connector on the control board is a three wire removable screw connector. The signals are as follows: A: Communications line (+) B: Communications line (-) C: Ground connection The following tables provide a list of the available objects along with a description of each. BACNet OBJECTS - CONTROL (READ/WRITE) Name Data Type Property Units Description TSTAT_Y1A Binary Input Present Value - Control signal to start / stop stage 1 (active is on) TSTAT_Y2A Binary Input Present Value - Control signal to start / stop stage 2 (active is on) Note: object names may be subject to change without prior notice. BACNet OBJECTS - ALARMS (READ ONLY) Name Data Type Property Units Description LPS1 Analog Input Alarm - Stage 1 low pressure alarm (suction pressure) HPS1 Analog Input Alarm - Stage 1 high pressure alarm (discharge pressure) PM1 Analog Input Alarm - Stage 1 phase monitor alarm PERM1 Analog Input Alarm - Stage 1 permanent lockout alarm LPS2 Analog Input Alarm - Stage 2 low pressure alarm (suction pressure) HPS2 Analog Input Alarm - Stage 2 high pressure alarm (discharge pressure) PM2 Analog Input Alarm - Stage 2 phase monitor alarm PERM2 Analog Input Alarm - Stage 2 permanent lockout alarm ODFLO Analog Input Alarm - Outdoor loop flow alarm IDFLO Analog Input Alarm - Indoor loop flow alarm Note: objects may be subject to change without prior notice. 28-Sep-2015 Page 18 002024SPC-01
BACNet SPECIFICATIONS continued BACNet OBJECTS - DATA (READ ONLY) Name Data Type Property Units Description HP_MODEL Analog Value Description - Heat pump model, ie W-240-H-P-5D-PP-01 HP_SERIAL Analog Value Description - Heat pump serial number ie 6500-01-13 FIRM_REV Analog Value Description - Firmware revision ie Firmware REV 01 LPS1 Analog Input Present Value PSIG (kpa) Stage 2 low pressure value (suction pressure) HPS1 Analog Input Present Value PSIG (kpa) Stage 2 high pressure value (discharge pressure) TS1 Analog Value Present Value degf (degc) Stage 2 suction line temperature SH_TS1 Analog Value Present Value degf (degc) Stage 2 superheat EEV1_POS Analog Output Present Value % Stage 2 EEV position (% open) AMPS1 Analog Input Present Value A Stage 2 compressor current draw (AI0) LPS2 Analog Input Present Value PSIG (kpa) Stage 2 low pressure value (suction pressure) HPS2 Analog Input Present Value PSIG (kpa) Stage 2 high pressure value (discharge pressure) TS2 Analog Value Present Value degf (degc) Stage 2 suction line temperature SH_TS2 Analog Value Present Value degf (degc) Stage 2 superheat EEV2_POS Analog Output Present Value % Stage 2 EEV position (% open) AMPS2 Analog Input Present Value A Stage 2 compressor current draw (AI1) O_IN_T Analog Input Present Value degf (degc) Outdoor IN temperature O_OUT_T Analog Input Present Value degf (degc) Outdoor OUT temperature O_DELTA_T Analog Value Present Value degf (degc) Outdoor temperature differential I_OUT_T Analog Input Present Value degf (degc) Indoor IN temperature I_OUT_T Analog Input Present Value degf (degc) Indoor OUT temperature I_DELTA_T Analog Input Present Value degf (degc) Indoor temperature differential Note: objects may be subject to change without prior notice. 28-Sep-2015 Page 19 002024SPC-01
ENGINEERING GUIDE SPECIFICATIONS General The liquid source water-to-water heat pump shall be a single packaged dual refrigeration circuit heating or cooling unit. The unit shall be listed by a nationally recognized safety-testing lab (NRTL), such as ETL, TUV, UL or CSA. The unit shall be rated in accordance with applicable standards of the Air Conditioning, Heating, and Refrigeration Institute / International Standards Organization (AHRI/ISO) and/or Canadian Standards Association (CSA). The liquid source water to water heat pump unit, as manufactured by Maritime Geothermal, Petitcodiac, New Brunswick, shall be designed to operate correctly within liquid temperature ranges specified on the Minimum and Maximum Operating Temperatures page of this engineering specification document. Factory Quality Each unit shall be run tested at the factory with water circulating in both indoor and outdoor loops. Quality control system checks shall include: computerized nitrogen pressurized leak test, evacuation of refrigeration circuit to sustained vacuum, accurate system charge, detailed heating and cooling mode tests, and quality cross check of all operational and test conditions to pass/fail criteria. Units tested without water flow are not acceptable. The units shall be warranted by the manufacturer against defects in materials and workmanship in accordance with the warranty section at the end of this document. Optional extended factory warranty coverage may be available. Cabinet Each unit shall be constructed with a heavy duty stand alone frame, and may optionally be enclosed in a sheet metal cabinet. Frame shall be constructed of powder coated galvanized sheet metal of minimum 11 gauge. Cabinet shall be constructed of powder coated galvanized sheet metal of minimum 16 gauge. Sheet metal gauge shall be higher where structurally required. Design and construction of cabinet shall be such that it is rigid and passes the CSA/UL Loading Test requirements (200 lb roof test and 25 lb guard test). All panels shall be lined with minimum 1 inch [25.4 mm] thick acoustic type glass fiber insulation. All insulation shall meet the fire retardant provisions of NFPA 90A. This material shall also provide acoustical benefit. The unit must have a minimum of six access panels for serviceability of the compressor compartment. Units having fewer than six access panels to compressor/heat exchangers/expansion device/ refrigerant piping shall not be acceptable. The electrical box shall have separate holes and knockouts for entrance of line voltage and low voltage control wiring. All factory-installed wiring passing through factory knockouts and openings shall be protected from sheet metal edges at openings by plastic grommets. Refrigerant Circuit All units shall contain two separate sealed refrigerant circuits, each containing a hermetic motor scroll compressor, one electronic expansion valve, factory installed high and low pressure safety controls, service ports, solid core filter-drier, sight glass and suction accumulator. Refrigerant circuits shall share brazed plate heat exchangers. Compressors shall be specified for heat pump duty with internal isolation consisting of rubber vibration isolators. Compressor motors shall have internal overload protection. Where compressor size exceeds 100 kbtu/hr, compressor shall be mechanically isolated from rest of refrigerant circuit by suction and discharge vibration absorbers. Compressor shall be equipped with a crankcase/sump heater to prevent liquid refrigerant migration during the off cycle and subsequent flooded starts. The water to refrigerant heat exchangers shall be of a stainless steel brazed plate design, designed and certified for 650 psig [4480 kpa] working pressure on the refrigerant side and 650 psig [4480 kpa] on the water side. Heat exchangers shall be insulated over all of their outside surface with minimum 3/8 thick closed cell insulation. Insulation consisting of 1/8 closed-cell insulating tape shall not be acceptable. The electronic expansion valves shall be of stepper-motor rather than pulsing type, and shall provide proper superheat control over the unit s operating range with minimal deviation from superheat setpoint. The valves shall be controlled by electronic superheat controller(s) which provide operator-adjustable superheat and real-time LED/LCD display of current superheat. Superheat shall be determined through the suction pressure-temperature method. Externally mounted pressure controlled water regulating flow valves or thermostatic expansion valves (TXV s) in place of electronic expansion valves are not acceptable. 28-Sep-2015 Page 20 002024SPC-01
ENGINEERING GUIDE SPECIFICATIONS (continued) The suction accumulator shall be insulated with minimum 3/8 thick closed cell insulation to prevent condensation. The accumulator s internal oil return port shall be sized properly for the unit s operating range. To ensure proper oil return, suction accumulator shall not be oversized. Piping and Connections The unit shall have two sets of primary water in and water out connections (outdoor and indoor). The primary connection type shall be 2 stainless steel pipe for Victaulic connection. All internal water and refrigerant piping shall be insulated with minimum 3/8 thick closed cell insulation. Insulation consisting of 1/8 closed-cell insulating tape shall not be acceptable. Electrical Controls and safety devices shall be factory wired and mounted within the unit. Controls shall include 24 volt alternating current (24VAC) activated compressor contactors, and 24VAC 100VA transformer with built in circuit breaker or fused on both primary and secondary sides. A terminal strip with screw in terminals shall be provided for field control wiring. Units shall be name-plated for use with time delay fuses or circuit breakers. Unit controls shall be 24VAC and provide heating (or cooling) as required by the remote thermostat or controller. 3-phase protection shall be present in each unit to protect the compressor against loss of phase and reverse rotation. 3-phase protection shall be factory installed. Unit shall have dry contacts for controlling loop circulating pumps via an external 24VAC contactor. Unit shall provide remote fault indication to the control system via serial communications and fault messages on front panel LCD display. Unit Control The control system shall have the following features: 1. Anti-short cycle time delay on compressor operation. Time delay shall be a minimum of 5 minutes, for both thermostat demand and safety control reset starts. An override shall be provided to disable this delay for unit commissioning and testing purposes. 2. Random compressor start delay of 0-120 seconds on unit power up to facilitate starting multiple units after a power failure. 3. Flow switch on outdoor and indoor loops. 4. Compressor shutdown for high or low refrigerant pressures, low flow conditions and for phase protection faults. 5. Automatic intelligent reset: unit shall automatically restart 5 minutes after trip if the fault has cleared. Should a fault reoccur 3 times sequentially then permanent lockout shall occur, requiring cycling of the power to the unit in order to reset. 6. Manual reset high pressure in case of electronic board failure. 7. The low pressure shall not be monitored for the first 90 seconds after a compressor start to prevent nuisance safety trips. 8. 2 x 16 backlit Liquid Crystal Display (LCD) and four buttons for limited data access. Unit may be configured for stand alone operation with optional temperature sensor(s). 9. Universal Serial Bus (USB) port for full data access and diagnostic information, including real-time charting and data-logging Maritime Geothermal works continually to improve its products. As a result, the design and specifications of any product may be changed without notice. Please contact Maritime Geothermal at 1-506-756-8135 or visit www.nordicghp.com for latest design and specifications. Purchaser s approval of this data set signifies that the equipment is acceptable under the provisions of the job specification. Statements and other information contained herein are not express warranties and do not form the basis of any commercial contract or other agreement between any parties, but are merely Maritime Geothermal s statement of opinion regarding its products. 28-Sep-2015 Page 21 002024SPC-01
LIMITED WARRANTY MARITIME GEOTHERMAL LTD. warrants that its commercial geothermal heat pumps 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. This warranty is subject to the following conditions: 1. The geothermal heat pump must be properly installed and maintained in accordance with MARITIME GEOTHERMAL LTD. guidelines. 2. The installer 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 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. 4. It is the customer's responsibility to supply the proper quantity and quality of water or properly sized ground loop with adequate freeze protection. If a geothermal heat pump 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 part 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. 28-Sep-2015 Page 22 002024SPC-01