Nordic W Series Application, Installation & Selection Manual
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Nordic W Series Application, Installation & Selection 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
28-Sept-2023
Page 1
002642MAN-01
28-Sep-2023

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Summary of Contents for Nordic W Series

  • Page 1 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.
  • Page 2 AC = Active Cooling (reversing valve) P = brazed plate W = desuperheater for DHW Compressor: Refrigerant: S = single stage scroll P = R410a (W series) B = R134a (WH series) Voltage Code: 2 = 208-3-60 4 = 460-3-60 5 = 575-3-60...
  • Page 3 APPLICATION TABLE Coaxial Coil models - available desuperheater MODEL FUNCTION REFRIGERANT VOLTAGE COMPR. OUTDOOR COIL 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 .
  • Page 4 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 Version...

  • Page 5: Table Of Contents

    002252PDG - Two Tank Piping with a Rev. Heat Pump ..23 Performance Tables: WH-235 ..........87 002288PDG - Two Tank Simultaneous Heating/Cooling ..24 Electrical Specifications - W Series ........88 001680PDG - Two Tank Sim. Heating/Cooling (Diverting) ..25 Electrical Specifications - WH Series ........89 000530PDG - Typical Zone Types .........

  • Page 6: Tables & Documents

    Tables & Documents Tables Table 1 - Power Supply Connections ......................10 Table 2 - Indoor & Outdoor Circulator Connections ..................10 Table 3 - Water Valve Connections ....................... 11 Table 4 - BACnet Connections ........................11 Table 5 - Setpoint Control Connections ......................11 Table 6 - Setpoint Control: Aux.

  • Page 7: System Description

    8-20 tons. (Dual compressor/dual refrigeration circuit heater. The desuperheater option heats DHW in a separate pre NORDIC heat pumps in the 12-81 ton size range are also of- -heat tank using a double wall heat exchanger with ~5% of the fered, detailed in a different manual.)

  • Page 8: Space Heating Mode

    Note that there is no direct A W series heat pump can handle low source loop tempera- connection between the zone thermostat and the heat pump, tures, as would be found in a northern climate geothermal the functions of each being separated by the buffer tank.

  • Page 9: Installation Basics

    Installation Basics Unpacking the Unit When the heat pumps reach the site, they should be unpacked to determine if any damage has occurred during shipment. Any visible damage should be noted on the carrier's freight bill and a claim filed. Unit Placement Locate the unit as per the system design drawings.

  • Page 10: Wiring

    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

    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

    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

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

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

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  • Page 16: Piping & Loop Information

    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

    Ground Loop Systems To avoid scale formation on the inside of the heat pump’s outdoor loop coil, total hardness should be less than 350 ppm / Note that in northern climates, only the W-series is suita- 350 mg/L. In practice, scaling is very rarely a problem at north- ble for use with a closed ground loop (WH is generally not suita- ern groundwater temperatures of 50°F or less because scale ble due to its minimum required source temperature of 45°F / 7°...

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

    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. It doesn’t respond to DHW demand.

  • Page 19: 002366Pdg - Recommended Buffer Tank Piping

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  • Page 20: 002367Pdg - Auxiliary Boiler Piping

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

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

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

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

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

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  • Page 26: 000530Pdg - Typical Zone Types

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

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

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  • Page 29: Operation

    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

    Setpoint Control window looks like this for Method 1 Setpoints (Indoor Loop - ICR): TABLE 12a - 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 RED—heating (Auxiliary)

  • Page 31: Outdoor Reset

    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

    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

    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. This is the one external Most of the time, hydronic heating/cooling heat pumps control requirement.

  • Page 34: B) Chiller Mode

    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

    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)

    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 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 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 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 alarm events in the Alarm List.
  • Page 40 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 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 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 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 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 between heating and...
  • Page 45 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. There is an AUTO CALIBRATION routine in the program that continu- ally calibrates the temperatures sensors against an on board reference resistor by applying an offset to the temperature sensors.
  • Page 46 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 · ALARM: logging frequency automatically set to 10 seconds, for 2 hours ·...
  • Page 47 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

    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: OK/EXIT button: UP button:...
  • Page 49 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 — Enable System? —...

  • Page 50: Bacnet Interface

    BACnet Interface The BACnet interface is an MS/TP connection via RS-485 twisted pair. BACnet IP is not available. Recommended wire: 22-24 AWG single twisted pair, 100-120 Ohms impedance, 17pF/ft or lower capacitance, with braided or alumi- num foil shield, such as Belden 9841 or 89841. The connector on the control board is a three wire removable screw connector.

  • Page 51: Table 17 - Bacnet Objects - Data (Read Only)

    TABLE 17 - 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 18 - Bacnet Objects - Alarm Descriptions (Read Only)

    TABLE 18 - 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 High pressure alarm LPS2...

  • Page 53: Table 19 - Bacnet Objects - Fault Descriptions (Read Only)

    TABLE 19 - BACnet OBJECTS - FAULT Descriptions (Read Only) Name Data Type Description AI4 (Cold Tank) Analog Input Cold tank temperature sensor faulty or disconnected - requires accessory Hot tank temperature sensor faulty or disconnected - requires accessory AI5 (Hot Tank) Analog Input LPS1 Analog Input...

  • Page 54: Startup Procedure

    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

    Unit Startup The unit is now ready to be started. The steps below outline the procedure for starting the unit and verifying proper operation of the unit. It is recommended that safety glasses be worn during the following procedures. IMPORTANT NOTE: The unit is shipped with the SYSTEM DISABLED in order to prevent the unit from starting when the power is first turned on.

  • Page 56: Startup Record

    Startup Record Startup Date Installation Site Installer City Company Check boxes unless Province Model asked to record data. Country Serial # Circle data units. Customer Name Customer Phone # PRE-START INSPECTION Indoor Loop All shut-off valve are open (full flow available) (Hydronic) Loop is full and purged of air Antifreeze type, if any...

  • Page 57: Routine Maintenance

    Routine Maintenance MAINTENANCE SCHEDULE Item Interval Procedure Strainers Monthly Inspect and clean if necessary. (if present) (more frequently immediately 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

    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 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 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 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. Re- ing inside compressor electrical box.
  • Page 62 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 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 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 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 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

    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

    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. Disconnect piping. Remove crankcase heater, leaving electrically connected. 3.

  • Page 69: Control Board Replacement Procedure

    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

    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

    Model Specific Information Table 20 - Recommended Flow Rates OUTDOOR & INDOOR LOOP INDOOR LOOP OUTDOOR LOOP INDOOR LOOPS (MAX. 130°F) (DHW to 140°F) MODEL MODEL gpm(US) gpm(US) gpm(US) gpm(US) WH-90 W-90 WH-100 W-100 WH-120 W-120 WH-140 W-140 WH-180 W-180 WH-235 W-235 Table 21 - Heat Pump Holdup Volumes...

  • Page 72: Operating Temperature Limits

    Table 24a - 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 Indoor...

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

    Table 25: INDOOR LOOP OUTDOOR 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 W/WH-90 W/WH-100 W/WH-120...

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

    METRIC Table 26: INDOOR LOOP OUTDOOR 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 W/WH-100 W/WH-120...

  • Page 75: Standard Capacity Ratings - W-Series

    Standard Capacity Ratings - W-Series Note: There are no Standard Capacity Ratings for the WH-Series; see WH Performance Tables. Table 27 - 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: W-90

    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. Compressor Input Cond.

  • Page 77: Performance Tables: W-100

    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. Compressor Input Cond.

  • Page 78: Performance Tables: W-120

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

  • Page 79: Performance Tables: W-140

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

  • Page 80: Performance Tables: W-180

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

  • Page 81: Performance Tables: W-235

    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. Flow Delta T Heating (°F) Temp.

  • Page 82: Performance Tables: Wh-90

    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. (gpm) (°F) (°F)

  • Page 83: Performance Tables: Wh-100

    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. (gpm) (°F) (°F)

  • Page 84: Performance Tables: Wh-120

    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. (gpm) (°F) (°F)

  • Page 85: Performance Tables: Wh-140

    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. (gpm) (°F) (°F)

  • Page 86: Performance Tables: Wh-180

    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. (gpm) (°F) (°F)

  • Page 87: Performance Tables: Wh-235

    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. (gpm) (°F) (°F)

  • Page 88: Electrical Specifications - W Series

    Electrical Specifications Table 28 - 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 13.8 17.1 #10-3 208-3-60...

  • Page 89: Electrical Specifications - Wh Series

    Electrical Specifications Table 29 - 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 11.5 12.3 15.2 #12-3...

  • Page 90: Electrical Diagrams (All Voltages)

    28-Sept-2023 Page 90 002642MAN-01...
  • Page 91 W/WH-90/100 Electrical Box Layout 28-Sept-2023 Page 91 002642MAN-01...
  • Page 92 W/WH-120/140/180/235 Electrical Box Layout 28-Sept-2023 Page 92 002642MAN-01...

  • Page 93: Refrigeration Circuit Diagrams

    W/WH-90/100 Refrigeration Circuit Diagram: H/HW Models 28-Sept-2023 Page 93 002642MAN-01...
  • Page 94 W/WH-90/100 Refrigeration Circuit Diagram: HAC/HACW Models 28-Sept-2023 Page 94 002642MAN-01...
  • Page 95 W/WH-90/100 Refrigeration Circuit Diagram: HAC/HACW Models 28-Sept-2023 Page 95 002642MAN-01...
  • Page 96 W/WH-120/140/180/235 Refrigeration Circuit Diagram: H/HW Models 28-Sept-2023 Page 96 002642MAN-01...
  • Page 97 W/WH-120/140/180/235 Refrigeration Circuit Diagram: HAC/HACW Models 28-Sept-2023 Page 97 002642MAN-01...
  • Page 98 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: OPTIONAL 3 FT 3 FT NO BACK SIDE CLEARANCE REQUIRED 28-Sept-2023 Page 98 002642MAN-01...

  • Page 99: Dimensions

    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

    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)

    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 EEV1 Local EEV...

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

    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 Reversing Valve#1 Off in heating mode, on in cooling mode (reversing HAC models only)

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

    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 Y1A* Aquastat stage1...

  • Page 104: Appendix B: Usb Driver Installation

    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)

    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)

    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

    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 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 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

    Warranty: W/WH-Commercial Series 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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