Engineering Specification

Engineering Specification W-300-HAC-P-*D-PP Commercial Water to Water Heat Pump Dual Refrigeration Circuit, R410a Nominal Size 23 Ton Reversing (Heating or Cooling) Maritime Geothermal Ltd. P.O. Box 2555, 170 Plantation Road Petitcodiac, NB E4Z 6H4 (506) 756-8135 info@nordicghp.com www.nordicghp.com 002027SPC-01 ISSUE 03 11-Jan-2018

Model Nomenclature W 300 HAC P 5D PP xx Series: W = liquid to water (hydronic) Nominal Size: 150 = 12 ton 185 = 17 ton 240 = 20 ton 300 = 23 ton 400 = 30 ton Functions: H = Heating AC = Active Cooling Refrigerant: P = R410a Revision: 01, 02 etc. Indoor Loop Exchanger: P = brazed plate Outdoor Loop Exchanger: P = brazed plate Compressor Type: D = dual scroll Voltage Code: 2 = 208-3-60 4 = 460-3-60 5 = 575-3-60 APPLICATION TABLE MODEL SIZE FUNCTION REFRIGERANT VOLTAGE COMPRESSOR OUTDOOR COIL INDOOR COIL REVISIONS W-300 HAC P 2 4 5 D P P 01 This manual applies only to the models and revisions listed in this table. Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification data at any time without prior notice. 11-Jan-2018 Page 2 002027SPC-01 ISSUE 03

Design Features TUV listed for electrical certification 11 gauge heavy duty standalone frame with slots for 4-side fork lift access Rubber mounting feet (optional spring foot kit, below) Insulated heat exchangers and piping Dual refrigeration circuits: each circuit operates independently Bitzer Orbit 8 Boreal scroll compressors with crankcase heaters Suction and discharge vibration absorbers (each circuit) Suction line accumulator (each circuit) Liquid line solid core filter-dryer (each circuit) Liquid line sight glass (each circuit) Electronic Expansion Valve (EEV) with built in sight glass (each circuit) Refrigeration service ports for each refrigeration circuit (1/4 Schrader) Full port 4-way reversing valve (each circuit) 316 stainless steel brazed plate heat exchangers 316 stainless piping with 3 Victaulic connections for the outdoor and indoor loops 3-phase protection 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, and also for indoor loop on reversing units Temperature sensor and P/T port on all four water lines (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 and 24VDC power supplies. USB port for complete data access using laptop computer and provided software; 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 (between 0-2 minutes) Dry contacts for external pump control (24VAC 5A MAX) Available Accessories 16ga satin galvanized acoustically insulated (1 thick) enclosure with powder coat finish and six removable panels, offering complete 360 degree access for servicing Spring foot kit, for use where floors have deflection (e.g. mezzanines) Temperature sensor(s) for standalone configuration 2 modulating water valve 11-Jan-2018 Page 3 002027SPC-01 ISSUE 03

Design Features Dual refrigeration circuit design allows independent operation of each circuit. 316SS true dual circuit brazed plate heat exchangers 2 316SS water line ports with Victaulic connections suction & discharge vibration absorbers Electronic Expansion Valves (EEV s) with sight glasses Bitzer Orbit 6 Boreal advanced scroll compressors with crankcase heaters refrigerant access ports full port 4-way reversing valves suction accumulators sight glasses heavy duty welded 11 gauge frame for rigidity solid core filter-dryers temperature sensor and P/T port on each water line 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 for floors with flex available) Suitable for open or closed loop applications. 11-Jan-2018 Page 4 002027SPC-01 ISSUE 03

Design Features OPTIONAL ENSLOSURE KIT (A-510) heavy duty enclosure constructed of 16ga satin galvanized steel, with powder coat finish completely insulated with 1 acoustic insulation seven removeable access panels; side panels can be removed from end when multiple units are installed side by side (no side access required) 2 Victaulic connections for loops 11-Jan-2018 Page 5 002027SPC-01 ISSUE 03

Dimensions WITHOUT ENCLOSURE 11-Jan-2018 Page 6 002027SPC-01 ISSUE 03

Dimensions WITH ENCLOSURE 11-Jan-2018 Page 7 002027SPC-01 ISSUE 03

Specifications 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 * Wire and breaker sizes should be verified by a qualified professional to verify conformance to local codes. Refrigerant Charge (Per Circuit) MODEL lb kg Oil Type W-300 11 5.0 PVE-BVC32 - Oil capacity is marked on the compressor label. - Refrigerant charge is subject to revision; actual charge is indicated on the unit nameplate. Shipping Information MODEL WEIGHT DIMENSIONS in (cm) lb. (kg) L W H Pressure Drops INDOOR (water 104 F) OUTDOOR (water 50 F) OUTDOOR (35% prop. glycol 32 F) gpm L/s psi kpa psi kpa psi kpa 40 2.5 0.9 6.2 1.0 6.9 2.1 14 48 3.0 1.2 8.3 1.3 9.0 2.5 17 60 3.8 1.8 12 1.9 13 3.1 21 72 4.5 2.6 18 2.7 19 3.7 26 90 5.7 4.0 28 4.1 28 4.8 33 W-300 1386 (630) 78 (198) 32 (81) 82 (208) Standard Capacity Ratings - Ground Loop Heating* EWT 104 F (40 C) Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop* Indoor Pressure Drop Input Energy 60Hz ELT 32 F (0 C) Model Capacity COP H gpm L/s psi kpa psi kpa Watts Btu/hr kw W/W W-300 72 4.6 3.7 26 2.6 18 18,650 231,000 68 3.66 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid Standard Capacity Ratings - Ground Water Heating EWT 104 F (40 C) Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop Indoor Pressure Drop Input Energy 60Hz ELT 50 F (10 C) Model Capacity COP H gpm L/s psi kpa psi kpa Watts Btu/hr kw W/W W-300 72 4.6 2.7 19 2.6 18 19,360 316,900 93 4.80 Standard Capacity Ratings - Ground Loop Cooling* EWT 53.6 F (12 C) Standard Capacity Ratings - Ground Water Cooling EWT 53.6 F (12 C) Liquid Flow (Outdoor & Indoor) Liquid Flow (Outdoor & Indoor) Outdoor Pressure Drop* Outdoor Pressure Drop Indoor Pressure Drop Indoor Pressure Drop Input Energy Input Energy 60Hz ELT 77 F (25 C) Model Evap. Capacity COP C EER gpm L/s psi kpa psi kpa Watts Btu/hr kw W/W Btu/hr/W W-300 72 4.6 2.8 19 2.7 19 15,960 272,500 80 5.00 17.1 * 35% Propylene Glycol by Volume Outdoor (Ground) Loop Fluid 60Hz ELT 59 F (15 C) Model Evap. Capacity COP C EER gpm L/s psi kpa psi kpa Watts Btu/hr kw W/W Btu/hr/W W-300 72 4.6 2.7 19 2.7 19 13,330 297,700 87 6.54 22.3 11-Jan-2018 Page 8 002027SPC-01 ISSUE 03

Specifications Operating Temperature Limits 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 50* 10* Flow control valve may be required in Indoor Loop. Maximum LWT Heating 130 54 Minimum LWT Cooling 32 0 Maximum EWT Cooling 80 27 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 LWT Heating 130 54 Minimum LWT Cooling 41 5 Maximum EWT Cooling 80 27 Loop Parameter Mode ( F) ( C) Notes Outdoor (Water) Indoor (Water) Minimum ELT Heating 46 8 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 LWT Heating 130 54 Minimum LWT Cooling 41 5 Maximum EWT Cooling 80 27 Loop Parameter Mode ( F) ( C) Notes Outdoor (Water) Indoor (Antifreeze) Minimum ELT Heating 46 8 Maximum ELT Heating 80 27 Minimum LLT Cooling 41* 5* 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 LWT Heating 130 54 Minimum LWT Cooling 32 0 Maximum EWT Cooling 80 27 Loop Parameter Mode ( F) ( C) Notes Outdoor (Antifreeze) Indoor Minimum LLT ICE 0-17 Maximum ELT ICE 80 27 Minimum EWT ICE 50* 10* Flow control valve may be required in Indoor Loop. Maximum LWT ICE 110 43 NOTES ELT/LLT: Entering/Leaving Liquid Temperature, EWT/LWT: Entering/Leaving Water Temperature. Values in these tables are for rated liquid and water flow values. Ensure adequate antifreeze protection is present for desired operating temperatures. * Reduce Loop flow until value is reached for startup if necessary. 11-Jan-2018 Page 9 002027SPC-01 ISSUE 03

Performance Tables Heating (Full Load) W-300-HAC Nominal 23 Ton R410a 60 Hz Source Data (Outdoor Loop) 35% Propylene Glycol by Volume Power Consumption Sink Data (Indoor Loop) Water ELT Evap. Temp Flow LLT Delta T HAB Effective COPh EWT Cond. Temp. 11-Jan-2018 Page 10 002027SPC-01 ISSUE 03 Flow LWT Delta T Output F F gpm F F Btu/hr Watts Amps* W/W F F gpm F F Btu/hr C C L/s C C watts C C L/s C C watts 25.0 15 72 20.6 4.4 145,251 18,253 24.6 3.31 104.0 115 72 109.7 5.7 206,114-3.9-9.4 4.5-6.3 2.4 42,558 40.0 45.8 4.5 43.2 3.2 60,391 30.0 19 72 25.1 4.9 162,335 18,460 24.9 3.55 104.0 115 72 110.2 6.2 223,905-1.1-7.2 4.5-3.8 2.7 47,564 40.0 46.1 4.5 43.5 3.5 65,604 35.0 24 72 29.5 5.5 184,728 18,657 25.2 3.88 104.0 116 72 110.9 6.9 246,973 1.7-4.4 4.5-1.4 3.1 54,125 40.0 46.4 4.5 43.8 3.8 72,362 40.0 30 72 33.8 6.2 207,317 18,873 25.5 4.20 104.0 116 72 111.5 7.5 270,296 4.4-1.1 4.5 1.0 3.5 60,743 40.0 46.7 4.5 44.2 4.2 79,196 45.0 34 72 38.6 6.4 228,925 19,033 25.9 4.51 104.0 117 72 112.1 8.1 292,910 7.2 1.1 4.5 3.7 3.5 67,074 40.0 46.9 4.5 44.5 4.5 85,822 50.0 39 72 43.0 7.0 251,767 19,360 26.3 4.80 104.0 117 72 112.8 8.8 316,871 10.0 3.9 4.5 6.1 3.9 73,767 40.0 47.2 4.5 44.9 4.9 92,842 55.0 43 72 47.4 7.6 273,206 19,711 26.8 5.05 104.0 118 72 113.4 9.4 339,506 12.8 6.1 4.5 8.6 4.2 80,049 40.0 47.5 4.5 45.2 5.2 99,474 60.0 48 72 51.7 8.3 298,426 20,039 27.2 5.35 104.0 118 72 114.2 10.2 365,845 15.6 8.9 4.5 10.9 4.6 87,438 40.0 47.8 4.5 45.7 5.7 107,192 * Multiply by 2.2 for 208VAC, by 0.8 for 575VAC Compressors: GSD60137VAB-430 (460-3-60) W-300-HAC Source Data (Indoor Loop) Water EWT Evap. Temp Cooling (Full Load) Power Consumption Flow LWT Delta T HAB Effective Efficiency ELT R410a 60 Hz Sink Data (Outdoor Loop) 35% Propylene Glycol by Volume Cond. Temp. Flow LLT Delta T Rejection F F gpm F F Btu/hr Watts Amps* COPc F F gpm F F Btu/hr C C L/s C C watts EER C C L/s C C watts 53.6 36.5 72 45.2 8.4 302,741 12,879 18.2 6.9 55 75 72 65.1 10.1 344,649 12.0 2.5 4.5 7.3 4.7 88,702 23.5 13 23.9 4.5 18.4 5.6 100,981 53.6 37.0 72 45.4 8.2 296,024 13,444 18.9 6.5 60 80 72 69.9 9.9 339,859 12.0 2.8 4.5 7.4 4.6 86,734 22.0 16 26.7 4.5 21.1 5.5 99,578 53.6 37.5 72 45.6 8.0 288,743 14,187 19.8 6.0 65 86 72 74.8 9.8 335,117 12.0 3.1 4.5 7.5 4.5 84,601 20.4 18 30.0 4.5 23.8 5.4 98,188 53.6 38.0 72 45.8 7.8 282,195 14,851 20.6 5.6 70 91 72 79.7 9.7 330,833 12.0 3.3 4.5 7.6 4.4 82,682 19.0 21 32.8 4.5 26.5 5.4 96,933 53.6 38.5 72 45.9 7.7 275,705 15,650 21.5 5.2 75 96 72 84.8 9.8 326,847 12.0 3.6 4.5 7.7 4.3 80,781 17.6 24 35.6 4.5 29.3 5.4 95,765 53.6 39.0 72 46.1 7.5 268,481 16,608 22.7 4.7 80 102 72 89.7 9.7 322,894 12.0 3.9 4.5 7.9 4.1 78,664 16.2 27 38.9 4.5 32.0 5.4 94,607 53.6 39.5 72 46.3 7.3 261,310 17,473 23.8 4.4 85 107 72 94.6 9.6 318,675 12.0 4.2 4.5 8.0 4.0 76,563 15.0 29 41.7 4.5 34.8 5.3 93,371 53.6 40.0 72 46.5 7.1 254,369 18,401 25.0 4.1 90 112 72 99.4 9.4 314,903 12.0 4.4 4.5 8.1 3.9 74,530 13.8 32 44.4 4.5 37.5 5.2 92,266 * Multiply by 2.2 for 208VAC, by 0.8 for 575VAC Compressors: GSD60137VAB-430 (460-3-60)

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BACnet Interface The BACnet interface is an MS/TP connection via RS-485 twisted pair. There is a termination jumper if required to terminate the connection. It is located just above the BACnet connector, marked as TERM on the control board. The connector on the control board is a three wire removable screw connector. The signals are as follows: A: Communications line (+) (right pin) B: Communications line (-) (middle pin) C: Ground connection (left pin) Vendor: Maritime Geothermal Ltd. Vendor ID: 260 Model Name: MGT GEN2 Control Board The following parameters can be set via the LED Display Configuration Menu or via the PC APP Configuration Page. 1) Baud rate 2) Instance number 3) MAC address The data is available regardless of the selected control method. In order to control the unit via the BACnet interface, set the Control Source to BACnet either by using the PC APP configuration page or the display menus. The following tables provide a list of the objects applicable to this model series, along with a description of each. Note that there may be other objects available that do not apply to this model. BACnet OBJECTS - CONTROL SIGNALS (READ/WRITE) Name Data Type ID Property Description SYSTEM_Y1A Binary Value BV0 Present Value Stage 1 - bottom compressor (active is on) SYSTEM_Y2A Binary Value BV1 Present Value Stage 2 - top compressor (active is on) SYSTEM_O Binary Value BV2 Present Value Switch both stages to cooling mode (RV#1 and RV#2). Inactive=HEATING, Active=COOLING BACnet_Units Binary Value BV9 Present Value Select the units to use for the BACnet objects Note: object names may be subject to change without prior notice. 11-Jan-2018 Page 16 002027SPC-01 ISSUE 03

BACnet OBJECTS - DATA (READ ONLY) Name Data Type ID Property Units Description LPS1 Analog Input AI6 Present Value PSIG (kpa) Stage 1 Low pressure value (suction pressure) HPS1 Analog Input AI7 Present Value PSIG (kpa) Stage 1 High pressure value (discharge pressure) EVAP1 Analog Input AI8 Present Value degf (degc) Stage 1 Evaporating Temperature COND1 Analog Input AI9 Setpoint Value degf (degc) Stage 1 Condensing Temperature Suction_Line1 Analog Input AI10 Present Value degf (degc) Stage 1 Suction line temperature Superheat1 Analog Input AI11 Setpoint Value degf (degc) Stage 1 Superheat EEV1_POS Analog Input AI12 Present Value % Stage 1 EEV position (% open) LPS2 Analog Input AI13 Present Value PSIG (kpa) Stage 2 Low pressure value (suction pressure) HPS2 Analog Input AI14 Present Value PSIG (kpa) Stage 2 High pressure value (discharge pressure) EVAP2 Analog Input AI15 Present Value degf (degc) Stage 2 Evaporating Temperature COND2 Analog Input AI16 Setpoint Value degf (degc) Stage 2 Condensing Temperature Suction_Line2 Analog Input AI17 Present Value degf (degc) Stage 2 Suction line temperature Superheat2 Analog Input AI18 Setpoint Value degf (degc) Stage 2 Superheat EEV2_POS Analog Input AI19 Present Value % Stage 2 EEV position (% open) Outside_Temp Analog Input AI20 Present Value degf (degc) Outdoor Ambient temperature ACCESSORY O_IN Analog Input AI21 Present Value degf (degc) Indoor IN temperature O_OUT Analog Input AI22 Present Value degf (degc) Indoor OUT temperature I_IN Analog Input AI23 Present Value degf (degc) Indoor IN temperature I_OUT Analog Input AI24 Present Value degf (degc) Indoor OUT temperature Comp1_Current Analog Input AI0 Present Value A Stage1 compressor current draw (AI0) Comp2_Current Analog Input AI1 Present Value A Stage2 compressor current draw (AI1) AI_2 Analog Input AI2 Present Value User Selectable User defined (0-5VDC or 4-20mA) AI_3 Analog Input AI3 Present Value User Selectable User defined (0-5VDC or 4-20mA) AI_4 Analog Input AI4 Present Value User Selectable User defined (0-5VDC or 4-20mA) AI_5 Analog Input AI5 Present Value User Selectable User defined (0-5VDC or 4-20mA) PWM_IN Analog Value AV0 Present Value % PWM input (from external source) PWM1 Analog Value AV1 Present Value % PWM output value (spare) PWM2 Analog Value AV2 Present Value % PWM output value (spare) PWM3 Analog Value AV3 Present Value % OV2 - PWM or 0-10VDC for Outdoor Loop water valve PWM4 Analog Value AV4 Present Value % IV2 - PWM or 0-10VDC for Indoor Loop water valve STAGE1 Binary Output BO0 Present Value N/A Compressor#1 contactor STAGE2 Binary Output BO1 Present Value N/A Compressor#2 contactor ICR Binary Output BO2 Present Value N/A Indoor circulator control DO_0 Binary Output BO3 Present Value N/A OV1 (for 24VAC Outdoor Loop water valve) DO_1 Binary Output BO4 Present Value N/A IV1 (for 24VAC Indoor Loop water valve) HYD_AUX Binary Output BO5 Present Value N/A Hydronic Auxiliary DO_3 Binary Output BO6 Present Value N/A Hydronic Auxiliary Only (without compressor) PHS_1 Binary Output BO7 Present Value N/A Dry contact lockout pin for Stage 1 PHS_2 Binary Output BO8 Present Value N/A Dry contact lockout pin for Stage 2 Outdoor Flow Binary Value BV10 Present Value N/A Outdoor Loop flow switch Indoor Flow Binary Value BV11 Present Value N/A Indoor Loop flow switch Phase Monitor1 Binary Value BV12 Present Value N/A Phase Monitor Stage 1 Phase Monitor2 Binary Value BV13 Present Value N/A Phase Monitor Stage 2 Comp_Monitor1 Binary Value BV14 Present Value N/A Compressor Monitor Stage 1 Comp_Monitor2 Binary Value BV15 Present Value N/A Compressor Monitor Stage 2 Note: available objects may be subject to change without prior notice. 11-Jan-2018 Page 17 002027SPC-01 ISSUE 03

BACnet OBJECTS - ALARMS AND FAULTS (READ ONLY) Name Data Type ID Alarm / Fault Description LPS1 Analog Value AI6 Alarm Low pressure alarm Stage 1. HPS1 Analog Value AI7 Alarm High pressure alarm Stage 1. LPS2 Analog Value AI13 Alarm Low pressure alarm Stage 2. HPS2 Analog Value AI14 Alarm High pressure alarm Stage 2. Outdoor Flow Binary Value BV10 Alarm Outdoor Loop flow alarm. Indoor Flow Binary Value BV11 Alarm Indoor Loop flow alarm. Phase Monitor1 Binary Value BV12 Alarm Phase Monitor alarm Stage 1. Phase Monitor2 Binary Value BV13 Alarm Phase Monitor alarm Stage 2. Comp_Monitor1 Binary Value BV14 Alarm Compressor Monitor alarm Stage 1. Comp_Monitor2 Binary Value BV15 Alarm Compressor Monitor alarm Stage 2. PERM_ALARMS1 Binary Value BV16 Alarm Indicates a permanent alarm for Stage 1. PERM_ALARMS2 Binary Value BV17 Alarm Indicates a permanent alarm for Stage 2. LPS1 Analog Value AI6 Fault Low pressure sensor faulty or disconnected Stage 1. HPS1 Analog Value AI7 Fault High pressure sensor faulty or disconnected Stage 1. LPS2 Analog Value AI13 Fault Low pressure sensor faulty or disconnected Stage 2. HPS2 Analog Value AI14 Fault High pressure sensor faulty or disconnected Stage 2. Suction_Line1 Analog Value AI10 Fault Suction line 1 temperature sensor faulty or disconnected. Suction_Line2 Analog Value AI17 Fault Suction line 2 temperature sensor faulty or disconnected. Outside_Temp Analog Value AI20 Fault Outside temperature sensor faulty or disconnected (ACCESSORY). O_IN Analog Value AI21 Fault Outdoor IN temperature sensor faulty or disconnected. O_OUT Analog Value AI22 Fault Outdoor OUT temperature sensor faulty or disconnected. I_IN Analog Value AI23 Fault Outdoor IN temperature sensor faulty or disconnected. I_OUT Analog Value AI24 Fault Outdoor OUT temperature sensor faulty or disconnected. Note: objects may be subject to change without prior notice. 11-Jan-2018 Page 18 002027SPC-01 ISSUE 03

Engineering Guide Specifications General The liquid source water-to-water heat pump shall be a single packaged dual refrigeration circuit heating / cooling unit. The unit shall be listed by a nationally recognized testing laboratory (NRTL), such as UL, CSA, TUV, or ETL. 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, as manufactured by Maritime Geothermal Ltd. of Petitcodiac, New Brunswick, Canada 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 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 standalone 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. Any enclosure must have a minimum of six access panels for serviceability of the compressor compartment. Enclosures 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 or sensors, service ports, solid core filter-dryer, sight glass, reversing valve (for reversing units), and suction accumulator. Refrigerant circuits shall share true dual circuit brazed plate heat exchangers. Reversing valve shall be of full port type and shall be of all-metal construction. Reversing valves with non-metal mechanical components shall not be acceptable. Compressors shall be specified for heat pump duty with internal isolation consisting of rubber vibration isolators. Compressor motors shall have internal overload protection. 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. 11-Jan-2018 Page 19 002027SPC-01 ISSUE 03

The suction accumulators 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 3 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, reversing valves, and 24VAC 100VA transformer with built in circuit breaker or fused on both primary and secondary sides. 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 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 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 loop, and also on indoor loop for reversing units. 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. 11-Jan-2018 Page 20 002027SPC-01 ISSUE 03

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 of 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(s) must be properly installed and maintained in accordance with MARITIME GEOTHERMAL LTD. s guidelines. Improper installation includes but is not limited to the following conditions: Indoor or outdoor loop flow lower than listed in engineering specification or as expressly approved by MARITIME GEOTHERMAL LTD. Operating the heat pump either manually or with automated controls so that the unit is forced to function outside its normal operating range or in a fashion which directly or indirectly leads to failure of components or the entire heat pump Disabling of safety controls Insufficient loop antifreeze concentration for loop temperature, or antifreeze concentration incorrectly set in control board Fouled heat exchangers due to poor water quality Failure to use strainers or clean them regularly Impact or physical damage sustained by the heat pump Poor refrigeration maintenance practices, including brazing without nitrogen flow, or using wrong braze/flux Incorrect voltage or missing phase supplied to unit Unit modified electrically or mechanically from factory supplied condition Water quality outside of recommended limits (e.g. salinity or ph) Unit not mounted with supplied anti-vibration grommets or optional spring feet Corrosion damage due to corrosive ambient environment Failure due to excessive cycling caused by improper mechanical setup or improperly programmed external controller Physical loads or pressures placed on unit from external equipment 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. 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 or is defective (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 has failed or is defective and was not caused by one of the circumstances listed above. 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. 11-Jan-2018 Page 21 002027SPC-01 ISSUE 03