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Maritime Geothermal ATW-55 Installation And Service Manual

Reversing air to water heat pump, two-stage r410a, sizes 25-75
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Installation and Service Manual
ATW-Series
Reversing Air to Water Heat Pump
Two-Stage R410a
Model Sizes 25-75
Maritime Geothermal Ltd.
info@nordicghp.com
P.O. Box 2555, 170 Plantation Road
www.nordicghp.com
Petitcodiac, NB E4Z 6H4
001970MAN-03
(506) 756-8135
12-Feb-2019
Page 1
001970MAN-03
ECO 000270 12-Feb-2019

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Summary of Contents for Maritime Geothermal ATW-55

  • Page 1 Installation and Service Manual ATW-Series Reversing Air to Water Heat Pump Two-Stage R410a Model Sizes 25-75 Maritime Geothermal Ltd. info@nordicghp.com P.O. Box 2555, 170 Plantation Road www.nordicghp.com Petitcodiac, NB E4Z 6H4 001970MAN-03 (506) 756-8135 12-Feb-2019 Page 1 001970MAN-03 ECO 000270 12-Feb-2019...
  • Page 2 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 Associated PC APP Version MGT GEN2 Bootload Firmware V2.90+ MGT GEN2 PC APP V1.52+ Maritime Geothermal Ltd. has a continuous improvement policy and reserves the right to modify specification data at any time without prior notice . 12-Feb-2019 Page 3 001970MAN-03...

  • Page 4: Table Of Contents

    002067CDG - Typ. Heating Only Zone Wiring (Setpoint) ..15 Performance Tables: ATW-45 ..........72 002068CDG - Typ. Htg/Cooling Zone Wiring (Setpoint) ..16 Performance Tables: ATW-55 ..........73 002069CDG - Typ. Heating Only Zone Wiring (Signals) ..17 Performance Tables: ATW-65 ..........74 002070CDG - Typ.

  • Page 5: Tables & Documents

    Tables & Documents Tables Table 1 - Heat Pump Size vs. Heated Area ....................7 Table 2 - Auxiliary Heat Sizing ........................ 7 Table 3 - Power Supply Connections ....................11 Table 4 - Outdoor Unit Power Supply Connections ................11 Table 5 - Indoor Loop Circulator Connections ..................

  • Page 6: Atw System Description

    ATW System Description General Overview minimize the chance of a fan freeze up, and to prevent snow from entering the unit through the fan opening during a snow The ATW-Series heat pump is an air source heat pump storm. The outdoor fan is controlled based on the suction pres- that can heat water for a hydronic heating system, or heat and sure and will slowly ramp up to the required speed when the cool water for a hydronic heating/cooling system.

  • Page 7: Atw Sizing

    Buffer tanks with elements that are certified for space heating generally possible to oversize an air source heat pump to cover use are available as accessories from Maritime Geothermal 100% of the coldest day heat load, since this would mean ex- Ltd., or others may be used.

  • Page 8: Installation Basics

    • ZONE THERMOSTATS • BUFFER TANK W/ELEMENTS 12/15/20 kW • RELAYS OR ZONE CONTROLLER • ZONE SUPPLY & RETURN HEADERS: OPTIONAL FROM MARITIME GEOTHERMAL 1” COPPER PIPE & FITTINGS • ANTI-VIBRATION PAD • PIPE & FITTINGS TO ZONES • SOUND JACKET •...

  • Page 9: Outdoor Unit Placement

    Two different leg kits which add either 15” (38 cm) or 30” (76 cm) of additional height are available as an accessory from Maritime Geothermal Ltd. To attach the legs, first remove the three bolts with flat washers that hold each foot plate in place. Leaving the foot...

  • Page 10: Average Max. Snow Depth Map - Canada

    Average Maximum Snow Depth - Canada (1979-1997) Source: Natural Resources Canada 001970MAN-03 Page 10 12-Feb-2019...

  • Page 11: Wiring

    Wiring Indoor Unit Power Supply Connections nect the circulator pump module to the appropriate terminal pair (115V or 230V) on the terminal strip marked Indoor Circulator Power supply for the heat pump from the breaker panel is Pumps, as per the voltage of the circulator pump. Ground supplied to the indoor unit.

  • Page 12: Outdoor Unit: Signal Connections

    The shield ground wire is connected only to the indoor from Maritime Geothermal as an accessory; see the setup unit; do not connect the shield ground to the outdoor unit instruction sheet that comes with tank and on following page.

  • Page 13: 002019Cdg - Typ. Atw Series Wiring

    12-Feb-2019 Page 13 001970MAN-03...

  • Page 14: 002375Qss - Eco Ultra Tanks: Getting Started

    001970MAN-03 Page 14 12-Feb-2019...

  • Page 15: 002067Cdg - Typ. Heating Only Zone Wiring (Setpoint)

    12-Feb-2019 Page 15 001970MAN-03...

  • Page 16: 002068Cdg - Typ. Htg/Cooling Zone Wiring (Setpoint)

    001970MAN-03 Page 16 12-Feb-2019...

  • Page 17: 002069Cdg - Typ. Heating Only Zone Wiring (Signals)

    12-Feb-2019 Page 17 001970MAN-03...

  • Page 18: 002070Cdg - Typ. Htg/Cooling Zone Wiring (Signals)

    001970MAN-03 Page 18 12-Feb-2019...

  • Page 19: Piping

    Piping Domestic Hot Water Number of Tanks (Desuperheater) Connections All systems will require at least one buffer tank. If there is The connections for the DHW circuit are 1/2” brass one buffer tank, it will contain the heated or chilled water. The FPT fittings.

  • Page 20: 002239Pdg - Typical Piping Connections - Atw Series

    001970MAN-03 Page 20 12-Feb-2019...

  • Page 21: 002366Pdg - Recommended Buffer Tank Piping

    12-Feb-2019 Page 21 001970MAN-03...

  • Page 22: 002252Pdg - Two Tank Piping With A Rev. Heat Pump

    001970MAN-03 Page 22 12-Feb-2019...

  • Page 23: 002367Pdg - Auxiliary Boiler Piping

    12-Feb-2019 Page 23 001970MAN-03...

  • Page 24: 000530Pdg - Typical Zone Types

    001970MAN-03 Page 24 12-Feb-2019...

  • Page 25: 001055Pdg - Connection To On-Demand Dhw Tank

    12-Feb-2019 Page 25 001970MAN-03...

  • Page 26: 000970Pdg - Desup. Conn. To Dhw Pre-Heat Tank

    001970MAN-03 Page 26 12-Feb-2019...

  • Page 27: Outdoor Unit Line Set

    Outdoor Unit Line Set Line Set Interconnect Tubing Pipe Insulation The indoor unit connections for the interconnect line set All line set piping between the indoor and outdoor units are brass service valves with flared fittings. should be insulated with 3/8” thick closed cell pipe insulation to prevent condensation and dripping onto floors or walls during Copper flare to solder adapters are included with the the heating season.

  • Page 28: Charging The System

    Charging the System The indoor unit is pre-charged for line sets up to 20 ft long. Once the system has been vacuumed, if extra refrigerant is required due to the length of the line set, it may be added before opening the access valves. Close off the charge valve on the refrigeration manifold set and disconnect the vacuum pump.

  • Page 29: 001983Cdg - Typical Atw Line Set Connections

    12-Feb-2019 Page 29 001970MAN-03...

  • Page 30: Operation

    Operation 1. BACnet Control 3. Setpoint Control If using BACnet Control, the heat pump will turn the 2 com- One of the features of the ATW’s GEN2 Control Board is pressor stages on and off and activate cooling mode when it is built in temperature control functionality called “Setpoint Con- told to by the building control system.

  • Page 31: Typical Temperature Settings

    Setpoint Control window looks like this for Method 1 (Indoor If using well-designed in-concrete-floor heating, the heat- Loop - ICR): ing setpoints may be able to be lowered. Lower heating set- points will translate directly into a higher COP (efficiency). Heat- ing setpoints should be set to the lowest values that still main- tain an acceptable temperature in the building on the coldest day of the year;...

  • Page 32: Outdoor Reset

    Outdoor Reset As mentioned earlier, lower heating setpoints will translate directly into a higher COP (efficiency). When Control Source HYD is set to Setpoints, an optional Outdoor Reset control algorithm is available for heating mode, which reduces the heating temperature setpoints at warmer outdoor temperatures as measured by the outdoor unit. To enable it, simply click on the Outdoor Reset button at the top of the Setpoint Control window.

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

    Setpoint Control window looks like this for Method 3 Setpoint Control Method 3 - External (HTS/CTS) (External HTS/CTS with One Tank): One Tank PC APP: Tools-->Configuration RED—heating BLUE—cooling LCD Interface: Configuration When this method is used, no indoor circulator control for temperature sampling will occur.

  • Page 34: Setpoint Control Method 4 - External Hts/Cts, 2 Tanks

    Setpoint Control window looks like this for Method 4 Setpoint Control Method 4 - External (HTS/CTS) (External HTS/CTS with Two Tanks): Two Tanks PC APP: Tools-->Configuration LCD Interface: Configuration Like with Method 3, when this method is used no indoor circulator control for temperature sampling will occur.

  • Page 35: Pc Application (Pc App)

    PC Application (PC App) NOTE: Before using the PC Application, refer to Appendix B & C 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 36 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. The main control panel window will open, shown below.
  • Page 37 View-->Alarms, Limits and Faults The alarms page has four tabs: ALARMS - Current alarm status, alarm count, high and low refrigeration alarm cutout values, and short cycle timer. ALARMS LIST - List of alarms that have occurred since the PC APP has been operating (this will be lost when the PC is discon- nected from the control board.) LIMITS - Limits in effect which prevent compressor operation but that do not cause an alarm.
  • Page 38 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 39 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 40 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 41 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 42 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 system oper- ation.
  • Page 43 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 time when unit can start again after various switching between heating and Count Reduce Time is alarm shutdowns...
  • Page 44 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 45 Tools-->Datalogging (Datalog tab): The datalog rate is set via the dropdown box at the top right of the PC App main window. Starting with firmware version 2.85, a log will be recorded at the datalog rate whenever the heat pump is powered on, making it easy to compare datalogs from multiple units . The maximum number of datalog records is 32,224, which will take 45 days to fill up at the default recording rate of 2 minutes.
  • Page 46 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 47: 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. Pressing OK will toggle between message auto scroll and manual scroll modes.
  • Page 48 Menu Tree Continued ENTER ENTER ENTER ENTER Description (From Main) (First Press) (Second Press) (Third Press) Enable summer setback. Summer Setback — Enable Setback? — Enable (only if using Disable summer setback. — Disable Setpoint Control) Disable compressor, auxiliary and ICR. System EN/DIS —...

  • Page 49: Bacnet Interface

    Communications line (-) (middle pin) C: Ground connection (left pin) Vendor: Maritime Geothermal Ltd. Vendor ID: 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.

  • Page 50: Table 21 - Bacnet Objects - Data (Read Only)

    TABLE 21 - BACnet OBJECTS - DATA (Read Only) Name Property Units Description Data—Type Analog Input AI0 (Comp1_Current) Present Value Amps Compressor current draw (AI0) - requires accessory 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...

  • Page 51: Table 22 - Bacnet Objects - Alarm Descriptions (Read Only)

    TABLE 22 - BACnet OBJECTS - ALARM Descriptions (Read Only) Name Data Type Description AI0 (Comp1 Current) Analog Input Stage 1 Status alarm (Start / Stop Failure) - requires accessory AI1 (Comp2 Current) Analog Input LPS1 Analog Input Low pressure alarm HPS1 Analog Input High pressure alarm...

  • Page 52: Table 23 - Bacnet Objects - Fault Descriptions (Read Only)

    TABLE 23 - 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 53: Startup Procedure

    A completed copy should be left on site, a copy kept on file by the installer, and a copy should be sent to Maritime Geothermal Ltd. Check the boxes or fill in the data as each step is completed. For data boxes, circle the appropriate units. Fill in the top section of all three copies, or one copy if photocopies can be made after the startup has been completed.

  • Page 54: Unit Startup

    1. The startup personnel shall sign and date the Startup Record and have the startup witness or appropriate site personnel sign as well. The startup personnel shall leave the Startup Record with the homeowner, retain a copy for filing and send a copy to Maritime Geothermal Ltd. for warranty registration. 001970MAN-03...

  • Page 55: Startup Record

    Cooling S1 Setpoint, S1 Delta, S2 Setpoint, S2 Delta °F °C Date: Startup Personnel Witness/Site Signature: Signature: A total of three copies are required, one for the site, one for the installer/startup and one to be sent to Maritime Geothermal Ltd. 12-Feb-2019 Page 55 001970MAN-03...

  • Page 56: General Maintenance

    General Maintenance WARNING: WHEN SERVICING THE OUTDOOR UNIT, BE SURE TO TURN OFF POWER TO THE INDOOR UNIT. The outdoor disconnect switch will not cut low voltage power, and damage to the control board will occur if the main heat pump breaker is not turned off during service. GENERAL MAINTENANCE SCHEDULE Item Interval...

  • Page 57: Troubleshooting Guide

    Troubleshooting Guide WARNING: WHEN SERVICING THE OUTDOOR UNIT, BE SURE TO TURN OFF POWER TO THE INDOOR UNIT. The outdoor disconnect switch will not cut low voltage power, and damage to the control board will occur if the main heat pump breaker is not turned off during service. The following steps are for troubleshooting the heat pump.
  • Page 58 ALARMS AND FAULTS TROUBLESHOOTING Alarm/Fault Description Recommended Action The data logging function of the GEN2 Control Board is a very useful tool for troubleshooting alarms. It provides a histo- ry of the unit operation up to and including the time at which the alarm(s) occurred. Note that some alarms require ac- cessory components.
  • Page 59 COMPRESSOR TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Compressor will Faulty control board. No 24vac output on STAGE1 when Replace control board. not start compressor should be operating. Faulty run capacitor. Check value with capacitance meter. Replace if faulty. (Single phase only) Should match label on capacitor.
  • Page 60 OPERATION TROUBLESHOOTING - HEATING MODE Possible Cause Verification Recommended Action Fault Outdoor temper- Outdoor EEV is mechani- Verify EEV operation (EEV2) - see Replace outdoor EEV if faulty. ature reading is cally faulty and causing EEV Troubleshooting section incorrect by a electromagnetic interfer- large amount ence...
  • Page 61 OPERATION TROUBLESHOOTING - HEATING MODE Fault Possible Cause Verification Recommended Action High suction EEV stuck open. Manually adjusting the EEV does Go to EEV troubleshooting sec- pressure not affect the superheat or the suc- tion. (may appear to tion pressure. Low super heat and not be pumping) discharge pressure.
  • Page 62 OPERATION TROUBLESHOOTING - DEFROST & COOLING MODES 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. Low superheat and not be pumping) discharge pressure.
  • Page 63 OPERATION TROUBLESHOOTING - DEFROST & COOLING MODES Fault Possible Cause Verification Recommended Action Outdoor temper- Outdoor EEV is mechani- Verify outdoor EEV operation Replace outdoor EEV if faulty. ature reading is cally faulty and causing (EEV2) - see EEV Troubleshooting incorrect by a electromagnetic interfer- section...
  • Page 64 EEV TROUBLESHOOTING If there is a refrigeration problem such as low charge, plugged filter-dryer, EEV stuck, or any other kind of restriction in the refrigeration system, the apparent EEV position will work its way towards 100% (full open). High superheat is also a symptom.

  • Page 65: Troubleshooting Tools

    DOMESTIC HOT WATER (DESUPERHEATER) TROUBLESHOOTING Fault Possible Cause Verification Recommended Action Insufficient hot Thermostat on hot water Visually inspect the setting. Adjust the setting. water (tank tank set too low. Should problem) be set at 120°F to 140°F. Breaker tripped, or fuse Check both line and load sides of Correct problem, and replace blown in electrical supply...

  • Page 66: Repair Procedures

    The heat pump is now ready for repairs. Always ensure nitrogen is flowing through the system during any soldering procedures to prevent soot buildup inside the pipes. Maritime Geothermal Ltd. recommends re- placing the liquid line filter-drier anytime the refrigeration system has been exposed to the atmosphere.

  • Page 67: Model Specific Information

    45 (114) ATW-45 294 (133) 34 (86) 34 (86) 35 (89) ATW-45 230 (104) 36 (91) 70 (178) 45 (114) ATW-55 318 (144) 34 (86) 34 (86) 35 (89) ATW-55 230 (104) 36 (91) 70 (178) 45 (114) ATW-65 334 (151)

  • Page 68: Pressure Drop Data

    Pressure Drop Data Table 31: Loop Pressure 15% Methanol 35% prop. glycol Water 104°F Water 50°F Drop Data 32°F 32°F 0.25 0.32 0.38 0.44 0.50 ATW- 0.57 0.63 0.69 0.76 0.82 10.1 0.25 0.32 0.38 0.44 0.50 0.57 ATW- 0.63 0.69 0.76 0.82...
  • Page 69 Table 31: Loop Pressure 15% Methanol 35% prop. glycol Water 104°F Water 50°F (cont’d) Drop Data 32°F 32°F 0.38 0.44 0.50 0.57 0.63 ATW- 0.69 0.76 0.82 0.88 0.95 1.01 0.38 0.44 0.50 0.57 0.63 0.69 ATW- 0.76 0.82 0.88 0.95 1.01 1.07...

  • Page 70: Standard Capacity Ratings

    6,470 2.07 47°F 3030 43,700 4.23 8°C 3030 12,800 4.23 105°F 41°C 17°F 3430 28,800 2.46 -8°C 3430 8,430 2.46 ATW-55 12.0 ATW-55 0.76 47°F 3630 41,900 3.39 8°C 3630 12,300 3.39 120°F 49°C 17°F 4080 28,000 2.02 -8°C 4080 8,210 2.02...

  • Page 71: Performance Tables: Atw-25

    Performance Tables ATW-25-HACW-P-1T R410a, 60 Hz, ZPS20K5E-PFV OUTDOOR ELECTRICAL INDOOR Outdoor Air Evaporating Heat Absorbed Compressor Input Condensing Liquid Flow Heating Delta T Temperature Temperature (Btu/hr) Current (A) Power (W) Temperature (gpm) (Btu/hr) -5°F -16°F 3,330 2410 102°F 111°F 3°F 11,400 1.38 5°F...

  • Page 72: Performance Tables: Atw-45

    Performance Tables ATW-45-HACW-P-1T R410a, 60 Hz, ZPS30K5E-PFV OUTDOOR ELECTRICAL INDOOR Outdoor Air Evaporating Heat Absorbed Compressor Input Condensing Liquid Flow Heating Delta T Temperature Temperature (Btu/hr) Current (A) Power (W) Temperature (gpm) (Btu/hr) -5°F -16°F 5,530 13.5 3290 102°F 110°F 3°F 16,600 1.48...

  • Page 73: Performance Tables: Atw-55

    Performance Tables ATW-55-HACW-P-1T R410a, 60 Hz, ZPS40K5E-PFV OUTDOOR ELECTRICAL INDOOR Outdoor Air Evaporating Heat Absorbed Compressor Input Condensing Liquid Flow Heating Delta T Temperature Temperature (Btu/hr) Current (A) Power (W) Temperature (gpm) (Btu/hr) -5°F -16°F 6,810 16.7 3870 102°F 110°F 3°F...

  • Page 74: Performance Tables: Atw-65

    Performance Tables ATW-65-HACW-P-1T R410a, 60 Hz, ZPS51K5E-PFV OUTDOOR ELECTRICAL INDOOR Outdoor Air Evaporating Heat Absorbed Compressor Input Condensing Liquid Flow Heating Delta T Temperature Temperature (Btu/hr) Current (A) Power (W) Temperature (gpm) (Btu/hr) -5°F -16°F 7,600 20.7 4730 102°F 110°F 3°F 23,400 1.45...

  • Page 75: Performance Tables: Atw-75

    Performance Tables ATW-75-HACW-P-1T R410a, 60 Hz, ZPS60K5E-PFV OUTDOOR ELECTRICAL INDOOR Outdoor Air Evaporating Heat Absorbed Compressor Input Condensing Liquid Flow Heating Delta T Temperature Temperature (Btu/hr) Current (A) Power (W) Temperature (gpm) (Btu/hr) -5°F -16°F 7,910 23.1 5140 102°F 110°F 3°F 25,100 1.43...

  • Page 76: Electrical Specifications

    Electrical Specifications TABLE 34 - ATW-Series Electrical Data Indoor Outdoor Max. Min. Power Supply Compressor Circulators Unit Breaker Wire Code V-ø-Hz Max A Max A Amps Amps Amps 230-1-60 11.7 17.1 20.0 #10-2* 208-3-60 11.9 13.5 #12-3* ATW- 460-3-60 #14-4 220-1-50 14.6 16.9...

  • Page 77: Wiring Diagram (208/230-1-60)

    Wiring Diagram (208/230-1-60) 12-Feb-2019 Page 77 001970MAN-03...

  • Page 78: Electrical Box Layout (208/230-1-60)

    Electrical Box Layout (208/230-1-60) 001970MAN-03 Page 78 12-Feb-2019...

  • Page 79: Wiring Diagram (208-3-60)

    Wiring Diagram (208-3-60) 12-Feb-2019 Page 79 001970MAN-03...

  • Page 80: Electrical Box Layout (208-3-60)

    Electrical Box Layout (208-3-60) 001970MAN-03 Page 80 12-Feb-2019...

  • Page 81: Wiring Diagram (460-3-60)

    Wiring Diagram (460-3-60) 12-Feb-2019 Page 81 001970MAN-03...

  • Page 82: Electrical Box Layout (460-3-60)

    Electrical Box Layout (460-3-60) 001970MAN-03 Page 82 12-Feb-2019...

  • Page 83: Ace-45/55 Wiring Diagram

    ACE-45/55 Wiring Diagram ACE-65/75 Wiring Diagram 12-Feb-2019 Page 83 001970MAN-03...

  • Page 84: Atw-Series Refrigeration Circuit - Heating Mode

    001970MAN-03 Page 84 12-Feb-2019...

  • Page 85: Atw-Series Refrigeration Circuit - Cooling/Defrost Mode

    12-Feb-2019 Page 85 001970MAN-03...

  • Page 86: Dimensions: Atw-25/45

    Dimensions: ATW-25/45 001970MAN-03 Page 86 12-Feb-2019...
  • Page 87 Dimensions: ATW-25/45 12-Feb-2019 Page 87 001970MAN-03...

  • Page 88: Dimensions: Atw-55

    Dimensions: ATW-55 001970MAN-03 Page 88 12-Feb-2019...
  • Page 89 Dimensions: ATW-55 12-Feb-2019 Page 89 001970MAN-03...

  • Page 90: Dimensions: Atw-65/75

    Dimensions: ATW-65/75 001970MAN-03 Page 90 12-Feb-2019...
  • Page 91 Dimensions: ATW-65/75 12-Feb-2019 Page 91 001970MAN-03...

  • Page 92: 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 93: 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 Mounted in Indoor Unit, measures discharge pressure. LPS1/LO1 Low Pressure Sensor 1 Mounted in Indoor Unit, measures suction pressure.

  • Page 94: Table A3 - Control Board Connector Descriptions (Bottom)

    TABLE A3 - Control Board Connector Descriptions (Bottom) Name Description BACnet MS/TP Ground for shield if required. BACnet MS/TP RS-485. BACnet MS/TP RS-485. STAGE1 Compressor Stage 1 Starts / stops the compressor. STAGE2 Compressor Stage 2 Turns the compressor Stage 2 solenoid on/off. RV_#1 Reversing Valve#1 Off in heating mode, on in cooling mode.

  • Page 95: Table A4 - Control Board Connector Descriptions (Right Side)

    TABLE A4 - Control Board Connector Descriptions (Right Side) Name Description DI_1 Digital Input1 Unused. DI_0 Digital Input0 Unused. Phase Monitor2 Unused. Phase Monitor1 Accessory for 3 phase models. Y2A* Aquastat Stage2 Optional stage 2 24VAC input for use with Signals/Hardwired control. Aquastat Power (24VAC) Optional 24VAC power supply for aquastat used with Signals/Hardwired control.

  • Page 96: Appendix B: Usb Driver Installation

    Appendix B - USB Driver Installation The first step in connecting a Windows laptop computer to the 3. Choose “Open with Windows Explorer”, and hit “OK”: control board is to install the USB driver. Any version of Windows from XP and onwards is compatible, including 7 &...

  • Page 97: Appendix C: Pc App Installation

    Appendix C - PC App Installation The second step in connecting a Windows laptop computer to 3. Choose “Open with Windows Explorer”, and hit “OK”: the control board is to install the PC App. Be sure USB driver is already installed. Any version of Windows from XP and onwards is compatible, including 7 &...

  • Page 98: Appendix D: Updating Firmware

    Appendix D: Updating Firmware METHOD 1: Updating Firmware Using PC App The following provides step by step instructions to update the firmware in the control board to the latest release. The firmware comes as a ZIP file named: MGT GEN2 Bootload Firmware Vxxx.zip where xxx is the version reference, e.g. 254 (version 2.54, this will be used for the remainder of this procedure).
  • Page 99 14. Programmed and verified. Click on Run Application. Click on Connect. The messages should read: The messages should read: If device fails to connect and an error message is displayed, the board’s bootloader may be older than v2.0. It will be necessary to instead update the firm- ware via jumper pins, as per the next section.

  • Page 100: Updating Firmware Via Jumper Pins

    METHOD 2: Updating Firmware Using Jumper Pins The following provides step by step instructions to update the 6. Turn the power back on. The control board is now in boot firmware in the control board to the latest release. loader mode and is ready to be programmed. The firmware comes as a ZIP file named: Run PIC32UBL.exe.

  • Page 101: Warranty

    2. The installer must complete the “Installation Data Sheet”, have it endorsed by the owner and return it to Maritime Geothermal Ltd. within 21 days of installation of the unit. 3. It is the responsibility of the building or general contractor to supply temporary heat to the structure prior to occupancy.

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