Maritime Geothermal NORDIC W Series Product Application, Installation And Service Manual
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Maritime Geothermal NORDIC W Series Product Application, Installation And Service Manual

Single compressor water to water heat pumps
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Application, Installation, & Service Manual
Commercial W-Series & WH-Series
Single Compressor Water to Water Heat Pumps
Model Sizes 90/100 (8 to 9 ton, coaxial coils)
Model Sizes 120/140/180/235 (10 to 20 ton, brazed plates, opt. dedicated DHW)
W/WH-90/100
W/WH-
120/140/180/235
Maritime Geothermal Ltd.
info@nordicghp.com
P.O. Box 2555, 170 Plantation Road
www.nordicghp.com
Petitcodiac, NB E4Z 6H4
002642MAN-01
(506) 756-8135
ISSUE 02: 12-Oct-2023

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  • Page 1 Model Sizes 90/100 (8 to 9 ton, coaxial coils) Model Sizes 120/140/180/235 (10 to 20 ton, brazed plates, opt. dedicated DHW) W/WH-90/100 W/WH- 120/140/180/235 Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 002642MAN-01...
  • Page 2 Search for any topic: SAFETY PRECAUTIONS WARNING: Ensure all access panels are in place and properly secured before applying power to the unit. Failure to do so may cause electrical shock. WARNING: Before performing service or maintenance on the heat pump system, ensure all power sources are DISCONNECTED.
  • Page 3 INDOOR COIL REVISIONS W-90 HACW W-100 HACW WH-90 HACW WH-100 HACW Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification data at any time without prior notice . ISSUE 02: 12-Oct-2023 Page 3 002642MAN-01...
  • Page 4 Search for any topic: APPLICATION TABLE Brazed Plate models - no desuperheater, available direct DHW heating if non-reversing MODEL FUNCTION REFRIGERANT VOLTAGE COMPR. OUTDOOR COIL INDOOR COIL REVISIONS W-120 W-140 W-180 W-235 WH-120 WH-140 WH-180 WH-235 APPLICATION TABLE - FIRMWARE AND PC APP Firmware Version Associated PC APP...

  • Page 5: Table Of Contents

    Search for any topic: Table of Contents Tables & Documents PC Application (PC APP) PC Application Menus System Description LCD Interface & Menus W-Series vs. WH-Series Two Different Heat Pump Layouts 1. Model Sizes 90/100: Coaxial Coils BACnet Interface 2. Model Sizes 120/140/180/235: Brazed Plates, DHW Space Heating Mode Startup Procedure Space Cooling Mode...

  • Page 6: Tables & Documents

    Search for any topic: Tables & Documents Tables Table 1 - Power Supply Connections Table 2 - Indoor & Outdoor Circulator Connections Table 3 - Water Valve Connections Table 4 - BACnet Connections Table 5 - Setpoint Control Connections Table 6 - Setpoint Control: Aux. Connections Table 7 - Signals Control Connections Table 8a - Typical W-Series Aquastat Settings Table 8b - Typical WH-Series Aquastat Settings...

  • Page 7: System Description

    Search for any topic: System Description These ‘light commercial’ models are designed in a tradi- All of the water-to-water heat pumps described in this manual have a single compressor and refrigeration circuit, in tional short cabinet, and can be stacked. They are available with or without a reversing valve, and with or without a desuper- size range 8-20 tons.

  • Page 8: Space Heating Mode

    Search for any topic: Space Heating Mode DHW Heating In space heating mode with a single wall condenser heat When heating domestic hot water (DHW) with the optional pump, the heat pump heats water in an indoor loop or buffer double wall condenser, the heat pump heats water in a DHW tank, while extracting heat from an outdoor loop.

  • Page 9: Installation Basics

    2'' Styrofoam, or the rubber pad available as an acces- Service clearance must be provided on the non-piping end sory from Maritime Geothermal. This will deaden compressor as well, for access to the electrical box and compressor. noise emitted from the bottom of the cabinet, and prevent cabi- net corrosion.

  • Page 10: Wiring

    Search for any topic: Wiring Power Supply Connections Outdoor Loop Circulator Pump Wiring The heat pump cabinet has several knockouts of various The outdoor loop circulator provides flow between the heat sizes for the electrical connections. pump and the outdoor loop. In most multiple-unit commercial installations, the circulators (and the heat pump) will be con- A schematic diagram (SCH) and electrical box layout trolled by the building automation system, since one circulator...

  • Page 11: Indoor Loop Water Valve Wiring

    Search for any topic: BACnet Control Connections Indoor Loop Water Valve Wiring In most multiple-unit commercial installations, the heat ON/OFF: Connect a 24VAC indoor loop water valve between pump will be controlled by the building automation system. If IV1 and GND (terminals DO_1 and LC on control board), as using BACnet for external control of heating/cooling demand shown on the wiring diagram (SCH) in the Model Specific In-...

  • Page 12: Setpoint Control: Aux. Connections

    Search for any topic: Setpoint Control: Aux. Connections zone circulator, and hydronic auxiliary for a heating only system. Note that for reversing models in cooling mode, it is im- When using Setpoint Control, hydronic auxiliary heat is portant to choose zone thermostats or other control devices that activated with a 24VAC signal from DO_2 (HYD_AUX) on the continuously send an “O”...

  • Page 13: 002188Cdg - Typ. Gen2 Indoor Circ. Connections

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 13 002642MAN-01...

  • Page 14: 002067Cdg - Typ. Heating Only Zone Wiring (Setpoint)

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 14 002642MAN-01...

  • Page 15: 002069Cdg - Typ. Heating Only Zone Wiring (Signals)

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 15 002642MAN-01...

  • Page 16: Piping & Loop Information

    Search for any topic: Piping & Loop Information Loop/Direct DHW Connections TABLE 9 - Connection Sizes The Outdoor Loop (Supply) and Indoor Loop (Hot) con- Heat Pump Con- Heat Exchanger Model Size nection types are shown in the table. Piping should be done as nection Size Type per the system piping diagram from the mechanical engineering...

  • Page 17: Ground Loop Systems

    A modulating water valve may be available as an accesso- Open Loop Systems ry from Maritime Geothermal Ltd. or may be sourced elsewhere, and can be installed on either the loop’s IN or OUT connections The temperature of the well water for open loop installa- at the heat pump.

  • Page 18: Desuperheater Connections (90/100 Only)

    Search for any topic: Desuperheater Connections (W/WH-90/100-HW/HACW ONLY) As opposed to direct DHW heating, the desuperheater is an optional feature on the W/H-90/100 only that heats domestic water with ~5% of the heat pump’s capacity when it is on for space heating or cooling purposes.

  • Page 19: 002366Pdg - Recommended Buffer Tank Piping

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 19 002642MAN-01...

  • Page 20: 002367Pdg - Auxiliary Boiler Piping

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 20 002642MAN-01...

  • Page 21: 002528Pdg - Buffer Tank Piping - Multiple Units

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 21 002642MAN-01...

  • Page 22: 002545Pdg - Dhw Tank Piping For Direct Dhw Heating

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 22 002642MAN-01...

  • Page 23: 002252Pdg - Two Tank Piping With A Rev. Heat Pump

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 23 002642MAN-01...

  • Page 24: 002288Pdg - Two Tank Simultaneous Heating/Cooling

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 24 002642MAN-01...

  • Page 25: 001680Pdg - Two Tank Sim. Heating/Cooling (Diverting)

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 25 002642MAN-01...

  • Page 26: 000530Pdg - Typical Zone Types

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 26 002642MAN-01...

  • Page 27: 000970Pdg - Desup. Connection To Dhw Pre-Heat Tank

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 27 002642MAN-01...

  • Page 28: 002384Pdg - Desup. Connection - Multiple Units

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 28 002642MAN-01...

  • Page 29: Operation

    Search for any topic: Operation 1. BACnet Control 3. Setpoint Control If using BACnet Control, the heat pump will turn the com- One of the features of the GEN2 Control Board is built in pressors on and off and activate cooling mode (for HAC/HACW temperature control functionality called “Setpoint Control”.

  • Page 30: Setpoints

    Search for any topic: Setpoint Control window looks like this for Method 1 Setpoints (Indoor Loop - ICR): TABLE 14a - Typical W-Series Setpoints Stage 2 Stage 1 (Auxiliary) HEATING °F °C °F °C Setpoint Delta Activation * Delay 10 minutes Stage 2 DHW HEATING Stage 1...

  • Page 31: Outdoor Reset

    Search for any topic: Outdoor Reset Then enable the outdoor sensor in the Tools --> Configu- ration window or LCD interface: As mentioned earlier, lower heating setpoints will translate directly into a higher COP (efficiency). Setpoint Control has an optional Outdoor Reset control algorithm for heating mode, PC APP: which reduces the heating temperature setpoints at warmer Tools-->Configuration...

  • Page 32: Setpoint Control Method 2 - Indoor Loop (Icr), 2 Tanks

    Search for any topic: Setpoint Control Method 2 - Indoor Loop (ICR) Two Tanks It is possible to use all of the Setpoint Control Method 1 However, it is suggested to use Method 4 (External HTS/ settings, and operate two buffer tanks: one for heated water and CTS with two tanks) for this purpose.

  • Page 33: Setpoint Control Method 3 - External Hts/Cts, One Tank

    Search for any topic: Setpoint Control Method 3 - External (HTS/CTS) One Tank For reversing models only (HAC/HACW), cooling mode is a) HTS/CTS w/ One Tank - Heat Pump Mode selected by making a dry contact connection between R/RA and O on the right side of control board.

  • Page 34: B) Chiller Mode

    Search for any topic: b) HTS/CTS w/ One Tank - Chiller Mode Setpoint Control window looks like this for Method 3b (External HTS/CTS with One Tank, Chiller Mode): For non-reversing models only (H), Chiller Mode allows the heat pump to be controlled from the Outdoor Loop (cold side) rather than the...

  • Page 35: Setpoint Control Method 4 - External Hts/Cts, 2 Tanks

    Search for any topic: Setpoint Control Method 4 - External (HTS/CTS) Two Tanks *REVERSING MODELS ONLY (HAC/HACW) Setpoint Control window looks like this for Method 4 PC APP: (External HTS/CTS with Two Tanks): Tools-->Configuration LCD Interface: Configuration Like with Method 3, when this method is used no indoor Click on up/down Toggle circulator control for temperature sampling will occur.

  • Page 36: Pc Application (Pc App)

    Search for any topic: PC Application (PC APP) NOTE: Before using the PC Application, refer to Appendices for installation instructions for the PC Application and USB driver for the COM port. Both must be installed in order to run the PC App and communicate with the control board. Connect a USB cable between the PC and the control board USB connector located at the bottom center of the board.
  • Page 37 Search for any topic: View Menu: This menu handles all of the operational viewing screens. Clicking on the View submenus will open the page in the PC APP’s frame. The next few pages of the manual show screenshots of each of the pages along with some descriptions of what is on each page. View-->Control Panel: The main control panel window will open, shown below.
  • Page 38 Search for any topic: View-->Alarms, Limits and Faults (ALARMS Tab): NOTE: Greyed out Alarms in the PC APP are not applicable to the system setup and are not monitored by the control board. NOTE: Refer to Alarms and Faults screenshot below to see which alarms have a count. Alarms without a count: These alarms only occur one time at which point they immediately create a Permanent Alarm.
  • Page 39 Search for any topic: View-->Alarms, Limits and Faults (ALARMS LIST Tab): This tab show a history of alarms that have occurred since the PC APP was connected to the control board. This list will be lost when the PC APP is disconnected. Each alarm that occurs while This button will erase the the PC APP is connected to...
  • Page 40 Search for any topic: View-->Alarms, Limits and Faults (FAULTS tab): This tab shows hardware faults that could occur. If one of these faults occurs there may be a problem with the control board hard- ware, with LCD Display and buttons, or with a sensor. If a fault occurs, some things to try: •...
  • Page 41 Search for any topic: View-->Water Lines Shows the water line temperatures. View-->Digital Inputs Shows the digital inputs and their individual status (ON/OFF). They may be individually controlled when in Manual Override Mode in order to facilitate troubleshooting. View-->Digital Outputs Shows the digital outputs and their individ- ual status (ON/OFF).
  • Page 42 Search for any topic: Graphs Menu: This menu is a list of the available graphs. Graphs are real-time and show a time stamp of when the recording started as well as a current time which will show up if the graph is screen captured. Each graph has a CLEAR button which will erase the stored data and restart the graph.
  • Page 43 Search for any topic: Tools Menu: This is where various tools for system setup and monitoring are located. Tools-->Configuration (System Configuration tab): This is where the system setup is done. Settings should only be changed by a person who has a good understanding of sys- tem operation.
  • Page 44 Search for any topic: Tools-->Configuration (Alarms and Delays tab): Click on the UP/DOWN arrows to change the value, noting that values have both a low and high limit. The number of minutes before the The minimum off unit can start again after various time when switching Count Reduce Time is alarm shutdowns...
  • Page 45 Search for any topic: Tools-->Calibration: Generally there is no need for calibration. The suction and discharge pressures may be calibrated in increments of 1 psi if there is a discrepancy in the readings when compared to a known good reference. Temperature sensors may be adjusted in increments of 0.1°F.
  • Page 46 Search for any topic: Tools-->Datalogging (Datalog tab): A log will be automatically recorded at the following rates: • SYSTEM DISABLED: every 10 minutes • SYSTEM ENABLED: logging frequency set via the dropdown box at the top right of the PC App main window •...
  • Page 47 Search for any topic: Tools-->Parameters: WARNING! The Parameters page is for advanced use only. Changing parameter values can cause the system to stop functioning properly. The parameters page shows all configurable memory spaces with their name and current value and allows them to be edited directly. To change a parameter value type in the new value and press ENTER.

  • Page 48: Lcd Interface & Menus

    Search for any topic: LCD Interface & Menus These are examples of the unit status and operating data displayed when at the message display level (top level). Pressing ENTER will enter into the menu levels beginning with the Main Menu. 2x16 LCD Display ENTER button: DOWN button:...
  • Page 49 Search for any topic: Menu Tree Continued ENTER ENTER ENTER ENTER Description (From Main) (First Press) (Second Press) (Third Press) Summer Setback — Enable Setback? — Enable Enable summer setback. (only if using — Disable Disable summer setback. Setpoint Control) System EN/DIS —...

  • Page 50: Bacnet Interface

    GND pin of the last unit. The shield grounds for intermediate units should be connected together. The shield ground should be left unconnected at the building controller end for all cases. Vendor: Maritime Geothermal Ltd. Vendor ID: Model Name: MGT GEN2 Control Board The following parameters can be set via the PC App’s Configuration Window:...

  • Page 51: Table 19 - Bacnet Objects - Data (Read Only)

    Search for any topic: TABLE 19 - BACnet OBJECTS - DATA (Read Only) Name Property Units Description AI0 (Comp1_Current) Present Value Amps Compressor current draw (AI0) AI1 (Comp2_Current) Present Value User User defined (0-5VDC or 4-20mA) Present Value User User defined (0-5VDC or 4-20mA) Present Value User User defined (0-5VDC or 4-20mA)

  • Page 52: Table 20 - Bacnet Objects - Alarm Descriptions (Read Only)

    Search for any topic: TABLE 20 - BACnet OBJECTS - ALARM Descriptions (Read Only) Name Data Type Description AI0 (Comp1 Current) Analog Input Status alarm (start / stop failure, from current sensor) AI1 (Comp2 Current) Analog Input LPS1 Analog Input Low pressure alarm HPS1 Analog Input...

  • Page 53: Table 21 - Bacnet Objects - Fault Descriptions (Read Only)

    Search for any topic: TABLE 21 - BACnet OBJECTS - FAULT Descriptions (Read Only) Name Data Type Description AI4 (Cold Tank) Analog Input Cold tank temperature sensor faulty or disconnected - requires accessory AI5 (Hot Tank) Analog Input Hot tank temperature sensor faulty or disconnected - requires accessory LPS1 Analog Input Low pressure sensor faulty or disconnected...

  • Page 54: Startup Procedure

    Search for any topic: Startup Procedure The 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 Geo- thermal Ltd..

  • Page 55: Unit Startup

    1. Sign and date the Startup Record and have the site personnel sign as well. Leave the Startup Record with the site personnel, retain a copy for filing and send a copy to Maritime Geothermal Ltd. for warranty registration. ISSUE 02: 12-Oct-2023...

  • Page 56: Startup Record

    Cooling S1 Setpoint, S1 Delta, S2 Setpoint, S2 Delta °F °C Date: Installer Signature: Client Signature: A total of three copies are required: one for the homeowner, one for the installer, and one to be sent to Maritime Geothermal Ltd. ISSUE 02: 12-Oct-2023 Page 56 002642MAN-01...

  • Page 57: Routine Maintenance

    Search for any topic: Routine Maintenance MAINTENANCE SCHEDULE Item Interval Procedure Strainers Monthly Inspect and clean if necessary. (more frequently immediately (if present) after initial startup) Compressor 1 year Inspect for pitted / burned points or loose wires. Contactor If necessary, replace contactor or tighten wires. LCD Interface or When heat pump problem is Check for alarms and faults (only necessary if...

  • Page 58: Troubleshooting Guide

    Search for any topic: Troubleshooting Guide The following steps are for troubleshooting the heat pump. Repair procedures and reference refrigeration circuit dia- grams can be found later in this manual. STEP 1: Verify that the LCD Interface is functioning . If it is not, proceed to POWER SUPPLY TROUBLE SHOOTING, otherwise proceed to STEP 2.
  • Page 59 Search for any topic: ALARM TROUBLESHOOTING Alarm/Fault Description Recommended Action Note that the data logging function of the GEN2 Control Board is a very useful tool for troubleshooting alarms. It pro- vides a history of the unit operation up to and including the time at which the alarm(s) occurred. Low Pressure A low pressure alarm occurs when the suction pressure drops to Go to the Low Pressure sec-...
  • Page 60 Search for any topic: FAULT TROUBLESHOOTING Alarm/Fault Description Recommended Action Digital Inputs Digital Outputs Cycle the power a few times; if the Analog Inputs A failure has occurred and the indicated section of the fault persists replace the control control board may no longer work properly. MODBUS Comms board.
  • Page 61 Search for any topic: COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Compressor will Faulty control board No 24vac output on STAGE1 or Replace control board. not start STAGE2 when compressor should be operating. Loose or faulty wiring Check all compressor wiring, includ- Fix any loose connections.
  • Page 62 Search for any topic: OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High or low Faulty sensor Compare pressure sensor reading Check wiring, replace sensor. If suction or dis- against a known reference such as a problem persists replace control charge pressure new refrigeration manifold set.
  • Page 63 Search for any topic: OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action Low suction EEV stuck almost closed Manually adjusting the EEV does Go to EEV troubleshooting section. pressure or partially blocked by for- not affect the superheat or the suc- (continued) eign object tion pressure.
  • Page 64 Search for any topic: OPERATION TROUBLESHOOTING - COOLING MODE (HAC / HACW models only) Fault Possible Cause Verification Recommended Action Heating instead Zone thermostat intercon- Verify that there is 24VAC across O Correct thermostat or external con- of cooling nection or external control and C/CA of the aquastat strip on trol system setup.
  • Page 65 Search for any topic: OPERATION TROUBLESHOOTING - COOLING MODE (HAC / HACW models only) Fault Possible Cause Verification Recommended Action High suction EEV stuck open Manually adjusting the EEV does Go to EEV troubleshooting section. pressure not affect the superheat or the suc- (may appear to tion pressure.
  • Page 66 Search for any topic: EEV (Electronic Expansion Valve) TROUBLESHOOTING Electronic expansion valves are a great advancement over TVX’s, allowing more precise refrigerant control, but they do have a couple of limitations. a) EEV’s receive commands to open or close from the control board, but they don’t send any feedback to the control board to confirm that command has been received and acted upon.

  • Page 67: Repair Procedures

    Search for any topic: Repair Procedures Pumpdown Procedure 1. Place the unit in SERVICE mode via the PC App or LCD interface; this will open the EEVs and start the circulators (if circulators are controlled by the heat pump). DO NOT turn off electrical power at the breaker panel, since the heat exchangers must have full water flow during refrigerant recovery.

  • Page 68: Compressor Replacement Procedure

    Search for any topic: Compressor Replacement Procedure 1. Pump down the unit as per the Pumpdown Procedure above. If there was a compressor burn out (motor failure), the refrigerant cannot be reused and must be disposed of according to local codes, 2.

  • Page 69: Control Board Replacement Procedure

    Search for any topic: Control Board Replacement Procedure 1. Turn the power off to the unit. 2. Take a picture of the control board and connectors for reference. The picture in Appendix A may also be helpful. 3. Carefully remove all green terminal strips on the left side, the right side and the bottom of the control board. They pull straight off the board, with no need to disconnect wires from their screw terminals.

  • Page 70: Lcd Interface (Display) Board Replacement Procedure

    Search for any topic: LCD Interface (Display) Board Replacement Procedure 1. Turn the power off to the unit. 2. Remove the display board cable connector from the control board. 3. Using a sharp utility knife with a long blade, slice each of the display board standoff heads off, taking care to not damage the lexan cover.

  • Page 71: Model Specific Information

    Search for any topic: Model Specific Information Table 22 - Recommended Flow Rates INDOOR LOOP INDOOR LOOP OUTDOOR & OUTDOOR LOOP INDOOR LOOPS (MAX. 130°F) (DHW to 140°F) MODEL MODEL gpm(US) gpm(US) gpm(US) gpm(US) W-90 WH-90 W-100 WH-100 W-120 WH-120 W-140 WH-140 W-180...

  • Page 72: Operating Temperature Limits

    Search for any topic: Table 26a - W-SERIES Operating Temperature Limits Loop Mode Parameter (°F) (°C) Note 0-10VDC modulating water valve required on indoor loop at Minimum ELT/EWT temperatures < 80°F (27°C), or manual flow reduction at startup HEATING Maximum LLT/LWT (indoor is hot loop) Domestic hot water (DHW) heating with double wall condenser Maximum LLT/LWT...

  • Page 73: Loop Pressure Drop Data (Us Units)

    Search for any topic: Table 27: OUTDOOR LOOP & INDOOR LOOP Pressure Drop Data INDOOR LOOP w/ SINGLE WALL OPTION w/ DOUBLE WALL OPTION (US UNITS) 15% methanol 35% prop. water 130°F water 104°F water 50°F DHW 140°F DHW 50°F 32°F glycol 32°F USgpm...

  • Page 74: Loop Pressure Drop Data (Metric Units)

    Search for any topic: METRIC Table 28: OUTDOOR LOOP & INDOOR LOOP Pressure Drop Data INDOOR LOOP w/ SINGLE WALL OPTION w/ DOUBLE WALL OPTION (METRIC UNITS) 15% methanol 35% prop. water 130°F water 104°F water 50°F DHW 140°F DHW 50°F 32°F glycol 32°F W/WH-90...

  • Page 75: Standard Capacity Ratings - W-Series

    Search for any topic: Standard Capacity Ratings - W-Series Note: There are no Standard Capacity Ratings for the WH-Series; see WH Performance Tables. Table 29 - W-SERIES Standard Capacity Ratings Standard Capacity Ratings - Ground Loop Heating* 60Hz EWT 104°F (40°C), ELT 32°F (0°C) Liquid Flow Nominal Size Input Energy...

  • Page 76: Performance Tables

    Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. Multiply by 2.2 for 208-3-60. W-90-H***-P-*S-CC R410a, 60 Hz, ZP91KCE-TFD (460-3-60) Multiply by 0.8 for 575-3-60. EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs.
  • Page 77 Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. Multiply by 2.2 for 208-3-60. W-100-H***-P-*S-CC R410a, 60 Hz, ZP103KCE-TFD (460-3-60) Multiply by 0.8 for 575-3-60. EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs.

  • Page 78: Performance Tables

    Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. Multiply by 2.2 for 208-3-60. W-120-H**-P-*S-P* Multiply by 0.8 for 575-3-60. R410a, 60 Hz, GSD60120VA (460-3-60) EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs.

  • Page 79: Performance Tables

    Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. Multiply by 2.2 for 208-3-60. W-140-H**-P-*S-P* Multiply by 0.8 for 575-3-60. R410a, 60 Hz, GSD60137VA (460-3-60) EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs.

  • Page 80: Performance Tables

    Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. Multiply by 2.2 for 208-3-60. W-180-H**-P-*S-P* Multiply by 0.8 for 575-3-60. R410a, 60 Hz, GSD60182VA (460-3-60) EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs.

  • Page 81: Performance Tables

    Search for any topic: Performance Tables - W-Series *Compressor current is for 460-3-60. W-235-H**-P-*S-P* Multiply by 0.8 for 575-3-60. R410a, 60 Hz, GSD60235VA (460-3-60) EVAPORATOR LOOP (35% Propylene Glycol) ELECTRICAL CONDENSER LOOP (Water) Evap. Flow Delta T Heat Abs. Compressor Input Cond.

  • Page 82: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-90-H***-B-*S-CC R134a, 60 Hz, ZR94KCE-TF5 (208-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 83: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-100-H***-B-*S-CC R134a, 60 Hz, ZR108KCE-TF5 (208-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 84: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-120-H**-B-*S-P* R134a, 60 Hz, ZR125KCE-TFD (460-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 85: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-140-H**-B-*S-P* R134a, 60 Hz, ZR144KCE-TFD (460-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 86: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-180-H**-B-*S-P* R134a, 60 Hz, ZR190KCE-TFD (460-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 87: Performance Tables

    Search for any topic: Performance Tables - WH-Series WH-235-H**-B-*S-P* R134a, 60 Hz, ZR250KCE-TFD (460-3-60) OUTDOOR LOOP (Water) ELECTRICAL INDOOR LOOP (Water) Compressor Evap. Flow Delta T Heat Abs. Input Cond. Flow Delta T Heating (°F) Temp. (gpm) (°F) (°F) (Btu/hr) Power (W) (°F) Temp.

  • Page 88: Electrical Specifications - W Series

    Search for any topic: Electrical Specifications Table 30 - W-Series Electrical Specifications Maximum Minimum Power Supply Compressor Nomenclature Fuse/Breaker Wire Size Identifier V-ø-Hz Amps Amps Amps 208-3-60 27.6 28.4 35.3 #6-3 460-3-60 12.8 13.6 16.8 #10-3 W-90 575-3-60 10.4 12.8 #12-3 380-3-50 13.0...

  • Page 89: Electrical Specifications - Wh Series

    Search for any topic: Electrical Specifications Table 31 - WH-Series Electrical Specifications Maximum Minimum Power Supply Compressor Nomenclature Fuse/Breaker Wire Size Identifier V-ø-Hz Amps Amps Amps 208-3-60 25.3 26.1 32.4 #6-3 460-3-60 11.5 12.3 15.2 #12-3 WH-90 575-3-60 10.3 11.1 13.7 #12-3 380-3-50...

  • Page 90: Electrical Diagrams (All Voltages)

    Search for any topic: ISSUE 02: 12-Oct-2023 Page 90 002642MAN-01...
  • Page 91 Search for any topic: W/WH-90/100 Electrical Box Layout ISSUE 02: 12-Oct-2023 Page 91 002642MAN-01...
  • Page 92 Search for any topic: W/WH-120/140/180/235 Electrical Box Layout ISSUE 02: 12-Oct-2023 Page 92 002642MAN-01...

  • Page 93: Refrigeration Circuit Diagrams

    Search for any topic: W/WH-90/100 Refrigeration Circuit Diagram: H/HW Models ISSUE 02: 12-Oct-2023 Page 93 002642MAN-01...
  • Page 94 Search for any topic: W/WH-90/100 Refrigeration Circuit Diagram: HAC/HACW Models ISSUE 02: 12-Oct-2023 Page 94 002642MAN-01...
  • Page 95 Search for any topic: W/WH-90/100 Refrigeration Circuit Diagram: HAC/HACW Models ISSUE 02: 12-Oct-2023 Page 95 002642MAN-01...
  • Page 96 Search for any topic: W/WH-120/140/180/235 Refrigeration Circuit Diagram: H/HW Models ISSUE 02: 12-Oct-2023 Page 96 002642MAN-01...
  • Page 97 Search for any topic: W/WH-120/140/180/235 Refrigeration Circuit Diagram: HAC/HACW Models ISSUE 02: 12-Oct-2023 Page 97 002642MAN-01...
  • Page 98 Search for any topic: W/WH-90/100 Dimensions: H/HAC Models All dimensions in inches. W/WH-90/100 Dimensions: HW/HACW Models (with desuperheater) LEFT SIDE RECOMMENDED RECOMMENDED CLEARANCE FRONT CLEARANCE: RIGHT SIDE CLEARANCE: 3 FT 3 FT OPTIONAL NO BACK SIDE CLEARANCE REQUIRED ISSUE 02: 12-Oct-2023 Page 98 002642MAN-01...

  • Page 99: Dimensions

    Search for any topic: W/WH-120/140/180/235 Dimensions All dimensions in inches. RECOMMENDED RECOMMENDED NO SIDE CLEARANCE REQUIRED FRONT CLEARANCE: RIGHT SIDE CLEARANCE: 3 FT 3 FT + HEADERS Double wall condenser option (“-PD”) for direct DHW heating shown. For single wall space heating models (“-PP”), DHW IN/OUT connections shown above become indoor closed loop connections.

  • Page 100: Appendix A: Control Board Description

    Search for any topic: Appendix A - GEN2 Control Board Description The picture below shows the locations of the connectors and LED indicators of the control board. The control board offers many fea- tures such as short circuit protection on all digital outputs, Real Time Clock with super capacitor for backup power, WiFi capability, relay outputs for plenum heater control (if equipped), USB port, PIC32 microcontroller, etc.

  • Page 101: Table A1 - Control Board Connector Descriptions (Top)

    Search for any topic: The tables describe the connections starting with the top of the board and working around the board counter clock-wise. TABLE A1 - Control Board Connector Descriptions (Top) Name Description HPS1/HI1 High Pressure Sensor 1 Measures discharge pressure LPS1/LO1 Low Pressure Sensor 1 Measures suction pressure...

  • Page 102: Table A3 - Control Board Connector Descriptions (Bottom)

    Search for any topic: TABLE A3 - Control Board Connector Descriptions (Bottom) Name Description BACnet MS/TP Ground for shield if required (see BACnet Interface section) BACnet MS/TP RS-485 BACnet MS/TP RS-485 STAGE1 Compressor Stage 1 Starts / stops compressor STAGE2 Compressor Stage 2 Unused RV#1...

  • Page 103: Table A4 - Control Board Connector Descriptions (Right Side)

    Search for any topic: TABLE A4 - Control Board Connector Descriptions (Right Side) Signal Description DI_1 Digital Input 1 Unused DI_0 Digital Input 0 Unused Phase Monitor 2 Unused Phase Monitor 1 Phase monitor alarm input Y2A* Aquastat stage 2 Unused Aquastat power (24VAC) Used only for external aquastat (Signals/Hardwired) control...

  • Page 104: Appendix B: Usb Driver Installation

    Search for any topic: Appendix B - USB Driver Installation (Windows 10 & earlier 4. In the window that is displayed, click and hold down the NOTE: This step is not necessary for Windows 11. mouse button on the folder name, and drag to your desktop: The first step in connecting a Windows 10 or earlier laptop computer to the control board is to install the USB driver.

  • Page 105: Appendix C: Pc App Installation (Win11)

    Search for any topic: Appendix C - PC App Installation (Windows 11) The PC App allows detailed interfacing with the control board 4. Click on the downloads icon on your browser, or using a Windows laptop computer. These instructions are for otherwise view a list of your downloaded files: Windows 11.

  • Page 106: Appendix D: Pc App Installation (Win10)

    Search for any topic: Appendix D - PC App Installation (Windows 10 & earlier) 4. In the window that is displayed, click and hold down the The PC App allows detailed interfacing with the control board mouse button on the folder name, and drag to your desktop: using a Windows laptop computer.

  • Page 107: Appendix E: Updating Firmware

    Search for any topic: Appendix E: Updating Firmware METHOD 1: Updating Firmware Using PC App This method can be used when updating newer control boards 7. Click on YES. The following message box will appear: with bootloader version 2.0. This method will not work for older control boards with bootloader version 1.0 (approx.
  • Page 108 Search for any topic: 12. Click on Load Hex File. Select the 16. Close the PIC32 program. MGL_GEN2_V376.production.hex (or higher version num- ber) file, which is in the folder you created on the Desktop. 17. WAIT APPROXIMATELY 10 SECONDS. This gives the control board time to reset, initialize and re-connect to the PC USB port.
  • Page 109 Search for any topic: METHOD 2: Updating Firmware Using Jumper Pins This method should be used when updating older control boards 6. Turn the power back on. The control board is now in boot that have bootloader version 1.0, or where the PC App has trou- loader mode and is ready to be programmed.

  • Page 110: Warranty

    COMMERCIAL LIMITED EXPRESS WARRANTY Unless a statement is specifically identified as a warranty, statements made by Maritime Geothermal Ltd. (“MG”) or its representatives relating to MG’s products, whether oral, written or contained in any sales literature, catalogue or agreement, are not express warranties and do not form a part of the basis of the bargain, but are merely MG’s opinion or commendation of MG’s products.

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