ENGINEERING SPECIFICATIONS

(1)

Email: [email protected] Web: www.nordicghp.com Document Number: 002027SPC-01

ENGINEERING SPECIFICATIONS

REV 01 Date: 28-Sep-2015

Commercial Hydronic Geothermal Heat Pump

**W-300-HAC-P-*D-PP**

Vertical Dual Refrigeration Circuit

Scroll Compressors

R410a Refrigerant

Nominal Size 24 Ton

Reversing (

Heating

OR

Cooling

)

Maritime Geothermal Ltd. PO Box 2555

Petitcodiac, NB E4Z 6H4 Ph. (506) 756-8135

(2)

The models and revisions covered by this document are listed in the table below.

MODEL

REVISION

W-300-HAC-P-2D-PP 01 W-300-HAC-P-4D-PP 01 W-300-HAC-P-5D-PP 01

Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification

W—300—HAC—P—2D—PP—xx

Series:

W = liquid to water (hydronic) Nominal Size: 300 = 24 Ton Functions: H = Heating AC = Active Cooling Refrigerant: P = R410a Voltage Code: 2 = 208-3-60 4 = 460-3-60 5 = 575-3-60 Compressor: D = Dual Scroll

Outdoor Loop Exchanger: P = Brazed Plate

Indoor Loop Exchanger: P = Brazed Plate

Revision: 01, 02 etc.

MODEL NOMENCLATURE

(3)

28-Sep-2015 Page 3 002027SPC-01

The geothermal heat pump described in this specification document has the following features:



Full port 4-way reversing valve (each circuit)



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



Heavy duty heat pump rated Bitzer Orbit 6 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 both outdoor loop and indoor 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 manu-al 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

DESIGN FEATURES LIST

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 pan-els 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

(4)

Heavy duty heat pump rated Bitzer Orbit 6 scroll compressors with crankcase heaters High efficiency 316SS brazed plate heat exchangers

Solid core filter-dryers Refrigerant access ports.

Electronic Expansion Valves (EEV) with sight glasses

Suction line accumulators Suction & discharge vibration absorbers

DESIGN FEATURES

Sight glasses

Full port 4-way revers-ing valves

Dual refrigeration circuit design allows independent operation of each circuit: Circuit #1: Bottom Compressor Circuit #2: Top Compressor

2” 316SS water line ports with Victaulic connections

Heavy duty 11ga frame for rigidity

Temperature sensor and P/T port on each water line port. Flow switch on outdoor and indoor loops.

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.

(5)

28-Sep-2015 Page 5 002027SPC-01

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

DESIGN FEATURES continued

316SS ports with 2” Victaulic connections

(6)

(7)

28-Sep-2015 Page 7 002027SPC-01

(8)

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 17. compressor contactors

18. circulator control relay 19. control transformer 21. circulator terminal strip 22. ground terminals 30. fuse holder

31. transformer primary fuse

ELECTRICAL BOX LAYOUT 460-3-60 and 575-3-60

ELECTRICAL BOX LAYOUT 208-3-60

30. power block

31. phase protection modules 34. control board

35. display board / user interface 37. compressor current sensors 17. compressor contactors

18. circulator control relay 19. control transformer 21. circulator terminal strip 22. ground terminals

(9)

28-Sep-2015 Page 9 002027SPC-01

ELECTRICAL SPECIFICATIONS

MISCELLANEOUS INFORMATION

Heat Pump Electrical Information Nomenclature

Identifier Power Supply

Compressors

(each) FLA MCA

Maximum Fuse/Breaker

Minimum Wire Size V-ø-Hz MIN MAX RLA LRA Amps Amps Amps ga

2 208-3-60 187 229 49.3 252 99.5 111.8 150 #1-3 4 460-3-60 414 506 25.1 137 50.7 57.0 80 #4-3 5 575-3-60 518 632 21.4 103 43.3 48.7 60 #6-3

Unit Weight _Refrigerant Type

Refrigerant Charge (per circuit)

Lbs. kg Lbs. kg

(10)

(11)

28-Sep-2015 Page 11 002027SPC-01

(12)

(13)

28-Sep-2015 Page 13 002027SPC-01

(14)

(15)

28-Sep-2015 Page 15 002027SPC-01

STANDARD CAPACITY RATINGS

The tables below depict the results of standard capacity rating tests according to C13256-2 standards. C13256-2 is identi-cal to ISO13256-2.

Standard Capacity Ratings - Ground Loop Heating* 60Hz EWT 104°F (40°C) ELT 32°F (0°C)

Model Nominal Size

Liquid Flow (Outdoor & Indoor)

Outdoor Pressure Drop

Input

Energy Capacity COPH Tons USGPM L/s PSI kPA PSI kPA Watts BTU/Hr kW W/W

300 24 72 4.6 3.7 25.5 2.6 17.9 18,556 218,385 64 3.45 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid

Indoor Pressure Drop

Standard Capacity Ratings - Ground Water Heating 60Hz EWT 104°F (40°C) ELT 50°F (10°C)

Input

Energy Capacity COPH Tons USGPM L/s PSI kPA PSI kPA Watts BTU/Hr kW W/W

300 24 72 4.6 2.7 18.6 2.6 17.9 19,607 310,207 91 4.64

Standard Capacity Ratings - Ground Water Cooling

EWT 53.6°F (12°C) ELT 59°F (15°C)

Input

Energy Capacity COPC EER Tons USGPM L/s PSI kPA PSI kPA Watts BTU/Hr kW W/W BTUHr/W

300 24 72 4.6 2.6 17.9 2.6 17.9 13,790 295,790 87 6.28 21.5

60Hz Standard Capacity Ratings - Ground Loop Cooling*

EWT 53.6°F (12°C) ELT 77°F (25°C)

Input

Energy Capacity COPC EER Tons USGPM L/s PSI kPA PSI kPA Watts BTU/Hr kW W/W BTUHr/W

300 24 72 4.6 2.9 20.0 2.6 17.9 16,712 272,184 78 4.77 16.3 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid

(16)

CAPACITY RATINGS

Heating (Full Load)

W-300-HAC

Nominal 24 Ton

R410a 60 Hz

Source Data (Outdoor Loop)

15% Methanol by Mass

Power Consumption

Sink Data (Indoor Loop)

Water

ELT Evap.

Temp Flow LLT Delta T HAB Effective COPh EWT

Cond.

Temp. Flow 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 72.0 21.0 4.0 134,596 18,189 24.2 3.13 104.0 115 72.0 109.4 5.4 194,434 -3.9 -9.4 4.54 -6.1 2.2 39,436 40.0 46.1 4.54 43.0 3.0 56,969 31.0 20 72.0 26.4 4.6 154,016 18,546 24.7 3.40 104.0 116 72.0 110.0 6.0 215,074 -0.6 -6.7 4.54 -3.1 2.6 45,126 40.0 46.7 4.54 43.3 3.3 63,016 36.0 25 72.0 30.6 5.4 178,596 18,701 24.9 3.76 104.0 116 72.0 110.7 6.7 240,182 2.2 -3.9 4.54 -0.8 3.0 52,328 40.0 46.7 4.54 43.7 3.7 70,373 41.0 30 72.0 34.9 6.1 202,063 19,234 25.6 4.04 104.0 117 72.0 111.4 7.4 265,470 5.0 -1.1 4.54 1.6 3.4 59,204 40.0 47.2 4.54 44.1 4.1 77,782 46.0 35 72.0 39.7 6.3 225,639 19,223 25.8 4.41 104.0 117 72.0 112.0 8.0 289,553 7.8 1.7 4.54 4.3 3.5 66,112 40.0 47.2 4.54 44.5 4.5 84,838 51.0 40 72.0 44.1 6.9 249,737 19,626 26.4 4.70 104.0 118 72.0 112.8 8.8 315,029 10.6 4.4 4.54 6.7 3.9 73,172 40.0 47.8 4.54 44.9 4.9 92,303 57.0 45 72.0 49.4 7.6 274,594 19,848 26.7 5.03 104.0 118 72.0 113.5 9.5 340,643 13.9 7.2 4.54 9.6 4.2 80,455 40.0 47.8 4.54 45.3 5.3 99,808 62.0 50 72.0 53.7 8.3 299,402 20,356 27.3 5.29 104.0 119 72.0 114.2 10.2 367,186 16.7 10.0 4.54 12.0 4.6 87,724 40.0 48.3 4.54 45.7 5.7 107,584

* Multiply by 2.2 for 208VAC, by 0.8 for 575VAC Compressors: GSD60137VAB-430 (460-3-60)

Cooling (Full Load)

W-300-HAC

R410a 60 Hz

Source Data (Indoor Loop)

Water

Power Consumption

Sink Data (Outdoor Loop)

15% Methanol by Mass

EWT Evap.

Temp Flow LWT Delta T HAB Total Efficiency ELT

Cond.

Temp. 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 35.5 72.0 45.2 8.4 303,833 13,094 18.4 6.8 54 75 72.0 64.1 10.1 346,150 12.0 1.9 4.542 7.3 4.7 89,022 23.2 12 23.9 4.542 17.8 5.6 101,421 53.6 36.0 72.0 45.3 8.3 297,438 13,669 19.1 6.4 58 80 72.0 68.0 10.0 341,720 12.0 2.2 4.542 7.4 4.6 87,149 21.8 14 26.7 4.542 20.0 5.6 100,123 53.6 36.5 72.0 45.5 8.1 291,134 14,296 19.8 6.0 63 85 72.0 72.9 9.9 337,554 12.0 2.5 4.542 7.5 4.5 85,301 20.4 17 29.4 4.542 22.7 5.5 98,902 53.6 37.0 72.0 45.7 7.9 285,191 14,960 20.6 5.6 68 90 72.0 77.8 9.8 333,878 12.0 2.8 4.542 7.6 4.4 83,560 19.1 20 32.2 4.542 25.4 5.4 97,825 53.6 37.5 72.0 45.9 7.7 278,724 15,919 21.6 5.1 73 95 72.0 82.9 9.9 329,918 12.0 3.1 4.542 7.7 4.3 81,665 17.5 23 35.0 4.542 28.3 5.5 96,665 53.6 38.0 72.0 46.0 7.6 272,184 16,712 22.5 4.8 77 100 72.0 86.8 9.8 326,085 12.0 3.3 4.542 7.8 4.2 79,749 16.3 25 37.8 4.542 30.4 5.4 95,542 53.6 38.5 72.0 46.2 7.4 265,608 17,566 23.6 4.4 82 105 72.0 91.7 9.7 322,422 12.0 3.6 4.542 7.9 4.1 77,822 15.1 28 40.6 4.542 33.1 5.4 94,469 53.6 39.0 72.0 46.4 7.2 258,398 18,482 24.8 4.1 87 110 72.0 96.5 9.5 318,342

(17)

28-Sep-2015 Page 17 002027SPC-01

Loop Parameter Mode (°F) (°C) Notes

Outdoor (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

Indoor (Water)

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.

Outdoor (Antifreeze)

Minimum ELT Heating 26 -3 Maximum ELT Heating 80 27

Indoor (Antifreeze)

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.

Outdoor (Antifreeze)

Minimum ELT Heating 26 -3 Maximum ELT Heating 80 27

Indoor (Water)

MINIMUM AND MAXIMUM OPERATING TEMPERATURES*

Outdoor (Water)

Minimum ELT Heating 43 6 Maximum ELT Heating 80 27

Indoor (Antifreeze)

(18)

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 SPECIFICATIONS

BACNet OBJECTS - CONTROL (READ/WRITE)

Data Type Description

Binary Input Control signal to start / stop stage 1 (active is on)

Binary Input Control Signal to switch between heating and cooling mode (active in cooling mode)

Note: object names may be subject to change without prior notice. Name

TSTAT_Y1A

TSTAT_O

TSTAT_Y2A Binary Input Control signal to start / stop stage 2 (active is on) Units - - - Property Present Value Present Value Present Value

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.

(19)

28-Sep-2015 Page 19 002027SPC-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

(20)

General

The liquid source reversing 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 Tem-peratures” 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 vacu-um, 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 com-pressor compartment. Units having fewer than six access panels to comcom-pressor/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. Com-pressor motors shall have internal overload protection. Where comCom-pressor size exceeds 100 kBtu/hr, comCom-pressor 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 pres-sure controlled water regulating flow valves or thermostatic expansion valves (TXV’s) in place of electronic expansion valves are not acceptable.

(21)

28-Sep-2015 Page 21 002027SPC-01

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 connec-tion type shall be 2” stainless steel pipe for Victaulic connecconnec-tion.

All internal water and refrigerant piping shall be insulated with minimum 3/8” thick closed cell insulation. Insulation con-sisting 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, reversing valves, 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 in-stalled. 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 communication 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 thermo-stat demand and safety control reset starts. An override shall be provided to disable this delay for unit commission-ing and testcommission-ing 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 un-der the provisions of the job specification. Statements and other information contained herein are not express warran-ties and do not form the basis of any commercial contract or other agreement between any parwarran-ties, but are merely Mari-time Geothermal’s statement of opinion regarding its products.

(22)

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.