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Summary of Contents for Mars Century EarthPure HNW Series
- Page 1 Installation, Operation and Maintenance HNW Series www.marsdelivers.com...
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Page 2: Table Of Contents
Coaxial Geothermal Open Loop Water-to-Water Table of Contents (HNW) Series Model Nomenclature General Information Storage Pre-Installation Physical Data Dimensional Data Unit Installation Water Connection Installation Ground Water Heat Pump Applications 9-10 Water Quality Standards Load Plumbing Installation Hot Water Generator 13-15 Electrical - Line Voltage Electrical - Low Voltage Wiring... -
Page 3: Model Nomenclature
Installation, Operation & Maintenance - HNW Series Model Nomenclature 4 5 6 0 3 6 LOAD WATER COIL OPTIONS C = COPPER MODEL TYPE N = CUPRO-NICKEL HN = HEAT CONTROLLER OPEN LOOP W-TO-W WATER CONNECTION LOCATION F = FRONT (036-120) CONFIGURATION W = WATER TO WATER SOURCE WATER COIL OPTIONS... -
Page 4: General Information
Installation, Operation & Maintenance - HNW Series General Information Safety � WARNING! � Warnings, cautions and notices appear throughout this manual. Read these items carefully before attempting any WARNING! All refrigerant discharged from this unit must installation, service, or troubleshooting of the equipment. be recovered WITHOUT EXCEPTION. -
Page 5: Storage
Installation, Operation & Maintenance - HNW Series General Information Inspection � CAUTION! � Upon receipt of the equipment, carefully check the shipment against the bill of lading. Make sure all units have been CAUTION! DO NOT store or install units in corrosive environments or in locations subject to temperature or received. -
Page 6: Physical Data
Installation, Operation & Maintenance - HNW Series Unit Physical Data Model Compressor (qty) Scroll (1) Scroll (2) Factory Charge HFC-410A (oz) [kg] Per Circuit 72 [2.04] 96 [2.49] 96 [2.49] Water Connection Size Source/Load 1" Swivel 1-1/2 FPT HWG (in) 1"... -
Page 7: Dimensional Data
Installation, Operation & Maintenance - HNW Series HNW036 - 120 Unit Dimensional Data (4.6 cm) (6.9 cm) (2.5 cm) Notes: (3.3 cm) 1. 3 feet front access is required, both sides access is optional preferred for service access. However, (2.5 cm) all components may be serviced from the front access panel if side access is not available. -
Page 8: Unit Installation
Installation, Operation & Maintenance - HNW Series Unit Installation Unit Location and comply with ALL applicable codes and regulations. These units are not designed for outdoor installation. Locate Locate the unit in an indoor area that allows easy removal of the unit in an INDOOR area that allows enough space for access panels, and has enough space for service personnel service personnel to perform typical maintenance or repairs. -
Page 9: Ground Water Heat Pump Applications
Installation, Operation & Maintenance - HNW Series Ground Water Heat Pump Applications or pond, etc.). Most local codes forbid the use of sanitary Open Loop - Ground Water Systems sewer for disposal. Consult your local building and zoning Typical open loop piping is shown in figure 2. Shut off valves department to assure compliance in your area. - Page 10 Installation, Operation & Maintenance - HNW Series Ground Water Heat Pump Applications � CAUTION! � CAUTION! Many units are installed with a factory or field supplied manual or electric shut-off valve. DAMAGE WILL OCCUR if shut-off valve is closed during unit operation. A high pressure switch must be installed on the heat pump side of any field provided shut-off valves and connected to the heat pump controls in series with the built-in refrigerant...
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Page 11: Water Quality Standards
Installation, Operation & Maintenance - HNW Series Water Quality Standards Table 3: Water Quality Requirements for HNW Water Quality Closed Open Loop and Recirculating Well Parameter Material Recirculating Scaling Potential - Primary Measurement Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below pH/Calcium Hardness pH <... -
Page 12: Load Plumbing Installation
Installation, Operation & Maintenance - HNW Series Load Side Plumbing Installation Note: The manufacturer strongly recommends all HNW Unit Load Plumbing piping connections, both internal and external to the The applications are too varied to describe in this document. However, some basic guidelines will be presented. All plumbing unit, be pressure tested by an appropriate method should conform to local codes with the following considerations: prior to any finishing of the interior space or before... -
Page 13: Hot Water Generator
Installation, Operation & Maintenance - HNW Series Hot Water Generator The HWG (Hot Water Generator) or desuperheater option Typically a single tank of at least 52 gallons (235 liters) is used provides considerable operating cost savings by utilizing to limit installation costs and space. However, a dual tank, as excess heat energy from the heat pump to help satisfy shown in Figure 4, is the most efficient system, providing the domestic hot water requirements. - Page 14 Installation, Operation & Maintenance - HNW Series Hot Water Generator Installation HWG Water Piping The HWG has two temperature sensors factory 1. Using at least 5/8” O.D. copper, route and install connected to HWG circuit board at PI. NEVER the water piping, valves and air vent as shown in DISCONNECT, RELOCATE OR REMOVE SENSORS! Figures 3 or 4.
- Page 15 Installation, Operation & Maintenance - HNW Series Hot Water Generator Initial Start-Up (After unit checkout and start-up procedure is complete) 1. Make sure all valves in the HWG water circuit are fully open. Energize the HWG by flipping DIP switch 12 to "off"...
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Page 16: Electrical - Line Voltage
Installation, Operation & Maintenance - HNW Series Electrical - Line Voltage � CAUTION! � � WARNING! � Use only copper conductors for field installed electrical Disconnect electrical power source to prevent injury or wiring. Unit terminals are not designed to accept other death from electrical shock. -
Page 17: Electrical - Low Voltage Wiring
Installation, Operation & Maintenance - HNW Series Electrical - Low Voltage Wiring Figure 6: AVM Valve Wiring Low Voltage Wiring DXM2 Unit is typically controlled by field installed and wired aquastat and mode changeover switch (R to O is cooling mode). Wire to DXM P1 terminals, use minimum 18GA Class II wire. -
Page 18: Electrical Wiring Diagrams
Installation, Operation & Maintenance - HNW Series HNW036 & HNW060 Electrical Wiring Diagram - 96B0223N11... - Page 19 Installation, Operation & Maintenance - HNW Series HNW120 Electrical Wiring Diagram - 96B0225N11...
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Page 20: Cxm Controls
Installation, Operation & Maintenance - HNW Series CXM Controls CXM Control removed from the CXM control. For detailed control information, see the CXM DIP switch 1: Unit Performance Sentinel Disable - provides field selection to disable the UPS feature. Application, Operation and Maintenance (AOM) manual On = Enabled. -
Page 21: Safety Features - Cxm Controls
Installation, Operation & Maintenance - HNW Series Safety Features - CXM Controls Safety Features – CXM Control thermistor temperature must be below the selected The safety features below are provided to protect low temperature limit setting for 30 continuous seconds during a compressor run cycle to be the compressor, heat exchangers, wiring and other recognized as a LT1 fault. - Page 22 Installation, Operation & Maintenance - HNW Series Safety Features the alarm relay will cycle on and off. The cycle rate will be “on” for 5 seconds, “off” for 25 seconds, “on” for 5 seconds, “off” for 25 seconds, etc. UPS warning code = 8 Swapped LT1/LT2 thermistors: During test mode, the control monitors to see if the LT1 and LT2 thermistors are in the appropriate places.
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Page 23: Unit Commissioning & Operating Conditions
Installation, Operation & Maintenance - HNW Series Unit Commissioning & Operating Conditions Unit Commissioning & Operating Table 6 Conditions BUILDING COMMISSIONING Cooling Heating Environment – This unit is designed for indoor Unit Size 060/120 060/120 installation only. Do not install in an area subject to freezing or where humidity levels can cause cabinet 50/80˚... -
Page 24: Unit & System Checkout
Installation, Operation & Maintenance - HNW Series Unit & System Checkout BEFORE POWERING SYSTEM, please check the following: operation. • System pH: Load water pH is 6 - 8.5. Proper pH � WARNING! � promotes longevity of hoses and fittings. •... -
Page 25: Unit Start Up Procedure
Installation, Operation & Maintenance - HNW Series Unit Start Up Procedure Table 7: Water Temperature Change � WARNING! � Through Source Heat Exchanger When the disconnect switch is closed, high voltage is Rise, Cooling Drop, Heating present in some areas of the electrical panel. Exercise Water Flow, gpm [l/m] °F, [°C] °F, [°C]... - Page 26 Installation, Operation & Maintenance - HNW Series Unit Start Up Procedure � WARNING! � the pressure drop across the heat exchanger to Table 8. Verify ALL water controls are open and allow water flow f. Check for vibration, noise, and water leaks. prior to engaging the compressor.
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Page 27: Operating Pressures
Installation, Operation & Maintenance - HNW Series Operating Pressures Table 9 HNW036-120 (HNW120 Per Circuit) (60 Hz I-P Units) Cooling Source Source Water Water Entering Water Load EWT Suction Discharge Super-heat Sub-cooling Temp Temp Water Flow °F @ 1.5-3.0 Pressure Pressure °F °F... - Page 28 Installation, Operation & Maintenance - HNW Series Operating Pressures Table 10 HNW036-120 (HNW120 Per Circuit) (60 Hz I-P Units) Heating Source Source Water Water Entering Water Load EWT Suction Discharge Super-heat Sub-cooling Temp Temp Water Flow °F @ 1.5-3.0 Pressure Pressure °F °F...
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Page 29: Preventive Maintenance
Installation, Operation & Maintenance - HNW Series Preventative Maintenance Load Water Coil Maintenance Generally water coil maintenance is not needed for closed loop systems. However, if the piping is known to have high dirt or debris content, it is best to establish a periodic maintenance schedule with the owner so the water coil can be checked regularly. -
Page 30: Troubleshooting Form
Installation, Operation & Maintenance - HNW Series HNW Troubleshooting Form HNW Water-to-Water (Heating and Cooling) Troubleshooting Form Customer: Loop Type: Startup Date: Model #: Serial #: Antifreeze Type & %: Complaint: REFRIGERANT: HFC-410A HEATING POSITION COOLING POSITION REFRIG FLOW - HEATING REFRIG FLOW - COOLING REVERSING VALVE... -
Page 31: Warranty
MARS installation instructions and in accordance with all local, state and warranty period, MARS shall have the right to allow a credit in the amount of national codes for normal use. -
Page 32: Revision History
Revision History Date: Item: Action: August 21, 2108 Page 4 Added Warning January 26, 2017 Page 14 Add caution December 14, 2015 First Published 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 9/2020...
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