Related Manuals for Mars Comfort-Aire Century Compact HEH Series
Summary of Contents for Mars Comfort-Aire Century Compact HEH Series
- Page 1 Installation, Operation & Maintenance Compact (HEH/HEV) Series HEH-HEV 024-60 60Hz - HFC-410A 97B0130N01 Issue Date: July 8, 2021...
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Page 2: Table Of Contents
Installation, Operation & Maintenance - HEH/HEV Compact Series Table of Contents Model Nomenclature General Information Unit Physical Data Horizontal Installation Field Conversion of Air Discharge Horizontal Installation Vertical Installation Piping Installation Variable Flow Heat Pump Applications Overview Water-Loop Heat Pump Applications Ground-Loop Heat Pump Applications Ground-Loop and Ground Water Heat Pump Applications... -
Page 3: Model Nomenclature
Installation, Operation & Maintenance - HEH/HEV Compact Series Model Nomenclature 4 5 6 0 3 6 MODEL TYPE SUPPLY AIR OPTIONS HE = HEAT CONTROLLER RESIDENTIAL 410A P = BACK DISCHARGE, HORIZONTAL ONLY W = STRAIGHT DISCHARGE, HORIZONTAL ONLY K = TOP DISCHARGE, VERTICAL ONLY CONFIGURATION H = HORIZONTAL RETURN AIR OPTIONS... -
Page 4: General Information
Installation, Operation & Maintenance - HEH/HEV Compact 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 Installation, Operation & Maintenance - HEH/HEV Compact Series General Information, Cont’d. ⚠ ⚠ Examine all pipes, fittings, and valves before installing CAUTION! any of the system components. Remove any dirt or debris found in or on these components. CAUTION! All three phase scroll compressors must have direction of rotation verified at start-up.
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Page 6: Unit Physical Data
Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Physical Data HE Two-Stage Series (60Hz Only) Model Compressor (1 Each) Scroll Factory Charge HFC-410A (oz) ECM Fan Motor & Blower Fan Motor (hp) Blower Wheel Size (dia x w) - (in) 10X10 11X10 Water Connection Size... -
Page 7: Horizontal Installation
Installation, Operation & Maintenance - HEH/HEV Compact Series Horizontal Installation Horizontal Unit Location Mounting Horizontal Units Units are not designed for outdoor installation. Locate Horizontal units have 4 hanger brackets partially attached the unit in an INDOOR area that allows enough space at the factory, one at each corner. - Page 8 Installation, Operation & Maintenance - HEH/HEV Compact Series Horizontal Installation, Cont’d. Figure 2: Horizontal Unit Pitch 1/4” (6.4mm) pitch toward drain for drainage Drain Connection Figure 3: Typical Horizontal Unit Installation 3/8" [10mm] threaded rods (by others) Stainless steel braid hose with integral "J"...
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Page 9: Field Conversion Of Air Discharge
Installation, Operation & Maintenance - HEH/HEV Compact Series Field Conversion of Air Discharge Overview - Horizontal units can be field converted Figure 4: Left Return Side to Back between side (straight) and back (end) discharge using Remove Screws Water the instructions below. Connection End Note: It is not possible to field convert return air Return Air... -
Page 10: Horizontal Installation
Installation, Operation & Maintenance - HEH/HEV Compact Series Horizontal Installation Condensate Piping - Horizontal Units - A condensate Figure 6: Horizontal Condensate Connection drain line must be installed and pitched away for the unit to allow for proper drainage. This connection must meet all 2”... -
Page 11: Vertical Installation
Installation, Operation & Maintenance - HEH/HEV Compact Series Vertical Installation Vertical Unit Location - Units are not designed for Figure 7: Vertical Unit Mounting outdoor installation. Locate the unit in an INDOOR area Internally insulate supply that allows enough space for service personnel to perform duct for the first 4’... - Page 12 Installation, Operation & Maintenance - HEH/HEV Compact Series Vertical Installation, Cont’d. Sound Attenuation for Vertical Units - Sound Condensate Piping for Vertical Units - A condensate attenuation is achieved by enclosing the unit within a line must be installed and pitched away from the unit to small mechanical room or a closet.
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Page 13: Piping Installation
Installation, Operation & Maintenance - HEH/HEV Compact Series Piping Installation Installation of Supply and Return Piping Refer to Figure 11 for an illustration of a typical supply/ Follow these piping guidelines. return hose kit. Adapters secure hose assemblies to the 1. -
Page 14: Variable Flow Heat Pump Applications Overview
Installation, Operation & Maintenance - HEH/HEV Compact Series Variable Flow Heat Pump Applications Overview Variable flow is a revolutionary new, intelligent, and includes an internal check valve for multiple unit efficient way to circulate water (or water plus antifreeze) installations. This pump is a factory installed option using internal, variable speed water flow control. - Page 15 Installation, Operation & Maintenance - HEH/HEV Compact Series Variable Flow Heat Pump Applications Overview, Cont’d. Water Pressure Schrader Ports the unit can be determined by measuring the water The pressure ports built in to the unit are provided as a pressure at the “water pressure out”...
- Page 16 Installation, Operation & Maintenance - HEH/HEV Compact Series High Head Variable Pump Performance No Check Valve With Check Valve Flow (gpm) I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e...
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Page 17: Water-Loop Heat Pump Applications
Installation, Operation & Maintenance - HEH/HEV Compact Series Water-Loop Heat Pump Applications Commercial Water Loop Applications The piping system should be flushed to remove dirt, piping Commercial systems typically include a number of units chips, and other foreign material prior to operation (see connected to a common piping system. -
Page 18: Ground-Loop Heat Pump Applications
Installation, Operation & Maintenance - HEH/HEV Compact Series Ground-Loop Heat Pump Applications ⚠ ⚠ Test individual horizontal loop circuits before backfilling. CAUTION! Test vertical U-bends and pond loop assemblies prior to installation. Pressures of at least 100 psi [689 kPa] should CAUTION! The following instructions represent industry be used when testing. -
Page 19: Ground-Loop And Ground Water Heat Pump Applications
Installation, Operation & Maintenance - HEH/HEV Compact Series Ground-Loop and Ground-Water Heat Pump Applications Ground-Loop Heat Pump Applications Typical Closed Loop with Central Pumping (unit with internal modulating water valve) To Thermostat Internal Motorized Modulating Valve Water Out Water In High and Low Voltage Shut Off... -
Page 20: Ground-Water Heat Pump Applications
Installation, Operation & Maintenance - HEH/HEV Compact Series Ground-Water Heat Pump Applications Open Loop - Ground Water Systems - Typical open Water Quality Standards - Table 3 should be consulted loop piping is shown in accompanying illustration. Shut off for water quality requirements. Scaling potential should valves should be included for ease of servicing. - Page 21 Installation, Operation & Maintenance - HEH/HEV Compact Series Ground-Water Heat Pump Applications, Cont’d. Flow Regulation - Units without Variable Flow - Flow regulation can be accomplished by two methods. One method of flow regulation involves simply adjusting the ball valve or water control valve on the discharge line. Measure the pressure drop through the unit heat exchanger, and determine flow rate from Table 10.
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Page 22: Water Quality Standards
Installation, Operation & Maintenance - HEH/HEV Compact Series Water Quality Standards Table 3: Water Quality Standards 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 23: Electrical - Line Voltage
Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical – Line Voltage ⚠ ⚠ Electrical - Line Voltage - All field installed wiring, WARNING! including electrical ground, must comply with the National Electrical Code as well as all applicable local codes. Refer WARNING! To avoid possible injury or death due to electrical to the unit electrical data for fuse sizes. - Page 24 Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical – Line Voltage, Cont’d. Units with Modulating Motorized Valve Voltage Min/Max Compressor Fan Motor Total Unit Min Circ Max Fuse/ Model Voltage HACR Code Voltage 208/230/60/1 197/252 11.7 58.3 15.6 18.5 208/230/60/1 197/252 13.1...
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Page 25: Electrical Data
Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical Data Units with High Head Variable Pump Compressor Pump Total Min/ Voltage Model Voltage Motor Motor Unit Circ Fuse/ Code Voltage HACR 208/230/60/1 197/252 11.7 58.3 1.44 17.0 20.0 208/230/60/1 197/252 14.7 1.44 18.4... -
Page 26: Electrical - Power & Low Voltage Wiring
Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical – Power & Low Voltage Wiring ⚠ ⚠ WARNING! Power Connection - Line voltage connection is made by connecting the incoming line voltage wires to the “L” side of the contractor as shown in the unit wiring diagram. Consult WARNING! Disconnect electrical power source to prevent injury or death from electrical shock. -
Page 27: Electrical - Low Voltage Wiring
Fan Enable Fan Speed Installation, Operation & Maintenance - HEH/HEV Compact Series Test Electrical – Low Voltage Wiring Micro Alarm Figure 12: LT1 Limit Setting Figure 13: Accessory Wiring Relay Fault Status P2 Terminal Strip 6 1/2" Factory low Typical voltage Molex Water connection for... -
Page 28: Electrical - Low Voltage Wiring For Non-Variable Flow Units Using External Motorized Water Valve
Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical – Low Voltage Wiring for non-Variable Flow Units Using External Motorized Water Valve Figure 14: AVM Valve Wiring Figure 15: Taco SBV Valve Wiring DXM2 Taco Valve Heater Switch Aquastat Unidad Empacada Figure 16: Two-Stage Piping Solenoid Flow... -
Page 29: Electrical - Thermostat Wiring
Installation, Operation & Maintenance - HEH/HEV Compact Series Electrical – Thermostat Wiring Figure 24a: Communicating Thermostat Connection to DXM2 Control Intelligent Thermostat DXM2 Thermostat Installation - The thermostat should be the position of the back plate mounting holes and drill 7602-457 located on an interior wall in a larger room, away from holes with a 3/16”... -
Page 30: Blower Performance Data
Installation, Operation & Maintenance - HEH/HEV Compact Series Blower Performance Data HE Standard Unit - No Reheat Cooling Mode Dehumid Mode Heating Mode Max ESP Fan Only Aux Emerg Model Motor Range (in wg) Mode Mode (hp) Stg 2 Stg 1 Stg 2 Stg 1 Stg 2... -
Page 31: Ecm Blower Control
Installation, Operation & Maintenance - HEH/HEV Compact Series ECM Blower Control The ECM fan is controlled directly by the DXM2 control The ramp down feature is eliminated during an ESD board that converts thermostat inputs and CFM settings (Emergency Shut Down) situation. When the DXM2 ESD to signals used by the ECM motor controller. -
Page 32: He Series Wiring Diagram Matrix
Installation, Operation & Maintenance - HEH/HEV Compact Series HE Series Wiring Diagram Matrix All current diagrams can be located online at climatemaster.com/commercial/literature/wiring-diagrams. 208v/1 - 265v/1 Unit Controller Fan Motor HE024 - 060 DXM2 CV ECM 96B0231N11 Auxiliary WD for LON 96B0147N17 Auxiliary WD for MPC 96B0147N14... -
Page 33: Dxm2 Controls
Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Controls DXM2 Control - For detailed control information, see DIP Switches – Note: In the following field configuration DXM2 Application, Operation and Maintenance (AOM) options, DIP switches should only be changed when manual (part # 97B0003N15). - Page 34 Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Controls, Cont’d. 1.6 – DDC output at EH2: DIP 1.6 provides selection for Table 4: Accessory DIP Switch Settings DDC operation. If set to “DDC Output at EH2,” the EH2 DIP 2.1 DIP 2.2 DIP 2.3 ACC1 Relay Option terminal will continuously output the last fault code of Cycle with fan...
- Page 35 Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Controls, Cont’d. Table 5: LED and Alarm Relay Output Table DMX2 CONTROLLER FAULT CODES DMX2 Fault and Status LED Operation Fault LED Status LED Alarm Relay with Test Mode Not Active (Red) (Green) DXM2 Is Non-Functional...
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Page 36: Dxm2 Layout And Connections
Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Layout and Connections Communicating Service tool 5" stat connection connection (240Vac) (240Vac) A+ 24V N.C. N.O. N.O. Fan Enable Fan Speed Test Button Conventional stat connection to Speed up Time Delays Test ECM Motor Connection... -
Page 37: Dxm2 Controls
Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Controls 5" DXM2 Control Start-up Operation – The control will not Figure 18: Test Mode Button operate until all inputs and safety controls are checked for normal conditions. The compressor will have a 5 minute anti- (240Vac) A+ 24V (240Vac) - Page 38 Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Controls, Cont’d. DXM2 Thermostat Details Table 7: Nominal Resistance at Various Temperatures Thermostat Compatibility – Most heat pump and heat/ Resistance Resistance Temp (ºC) Temp (ºF) Temp (ºC) Temp (ºF) (kOhm) (kOhm) cool thermostats can be used with the DXM2, as well as -17.8...
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Page 39: Unit Starting And Operating Conditions
Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Starting and Operating Conditions Operating Limits Commissioning Conditions Environment – Units are designed for indoor installation Consult Table 9 for the particular model. Starting conditions only. Never install units in areas subject to freezing or where vary depending upon model and are based upon the humidity levels could cause cabinet condensation (such as following notes:... -
Page 40: Piping System Cleaning And Flushing
Installation, Operation & Maintenance - HEH/HEV Compact Series Piping System Cleaning and Flushing Piping System Cleaning and Flushing - Cleaning and 10. When the system is successfully cleaned, flushed, flushing the WLHP piping system is the single most refilled and bled, check the main system panels, important step to ensure proper start-up and continued safety cutouts and alarms. -
Page 41: Unit And System Checkout
Installation, Operation & Maintenance - HEH/HEV Compact Series Unit System Checkout ⚠ ⚠ SYSTEM CHECKOUT WARNING! System water temperature: Check water temperature WARNING! Polyolester Oil, commonly known as POE oil, is for proper range and also verify heating and cooling a synthetic oil used in many refrigeration systems including set points for proper operation. -
Page 42: Unit Start-Up Procedure
Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Start-Up Procedure Unit Start-up Procedure Check air temperature drop across the air coil when compressor is operating. Air temperature drop should 1. Turn the thermostat fan position to “ON”. Blower be between 15°F and 25°F [8°C and 14°C]. should start. -
Page 43: Unit Operating Conditions
Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Operating Conditions ⚠ ⚠ Table 10: HE Coax Water Pressure Drop WARNING! Pressure Drop (psi) Model WARNING! When the disconnect switch is closed, high 30°F* 50°F 70°F 90°F voltage is present in some areas of the electrical panel. Exercise caution when working with energized equipment. - Page 44 Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Operating Conditions Table 11: HE Series Typical Unit Operating Pressures and Temperatures (60Hz – I-P Units) Full Load Cooling - without HWG active Full Load Heating - without HWG active Entering Water Suction Discharge...
- Page 45 Installation, Operation & Maintenance - HEH/HEV Compact Series Unit Operating Condition, Cont’d. Full Load Cooling - without HWG active Full Load Heating - without HWG active Entering Water Suction Discharge Water Suction Discharge Water Air Temp Air Temp Water Flow Pressure Pressure Superheat...
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Page 46: Preventive Maintenance
Installation, Operation & Maintenance - HEH/HEV Compact Series Preventive Maintenance Water Coil Maintenance - (Direct ground water these filters (in the opposite direction of the normal air applications only) If the system is installed in an area with flow) once per month using a high pressure wash similar a known high mineral content (125 P.P.M. -
Page 47: Troubleshooting
Installation, Operation & Maintenance - HEH/HEV Compact Series Troubleshooting General Outputs If operational difficulties are encountered, perform The compressor and reversing valve relays are 24VAC the preliminary checks below before referring to the and can be verified using a voltmeter. For units with ECM troubleshooting charts. - Page 48 Installation, Operation & Maintenance - HEH/HEV Compact Series Troubleshooting, Cont’d. Advanced Diagnostics If a communicating thermostat or diagnostic tool (7602- 444) is connected to the DXM2, additional diagnostic information and troubleshooting capabilities are available. The current status of all DXM2 inputs can be verified, including the current temperature readings of all temperature inputs.
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Page 49: Dxm2 Process Flow Chart
Installation, Operation & Maintenance - HEH/HEV Compact Series DXM2 Process Flow Chart ⚠ ⚠ WARNING! WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death. DXM2 Functional Start Troubleshooting Flow Chart... -
Page 50: Functional Troubleshooting
Installation, Operation & Maintenance - HEH/HEV Compact Series Functional Troubleshooting Fault Clg Possible Cause Solution Check line voltage circuit breaker and disconnect. Check for line voltage between L1 and L2 on the contactor. Main power problems Green Status LED Off Check for 24VAC between R and C on CXM/DXM' Check primary/secondary voltage on transformer. - Page 51 Installation, Operation & Maintenance - HEH/HEV Compact Series Functional Troubleshooting, Cont’d. Fault Clg Possible Cause Solution Check for dirty air filter and clean or replace Reduced or no air flow in cooling or Check fan motor operation and airflow restrictions Low Air Coil Pressure ClimaDry Too high of external static - check static vs blower table...
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Page 52: Performance Troubleshooting
Installation, Operation & Maintenance - HEH/HEV Compact Series Performance Troubleshooting Symptom Htg Clg Possible Cause Solution Dirty filter Replace or clean Check for dirty air filter and clean or replace Reduced or no air flow Check fan motor operation and airflow restrictions in heating Too high of external static - check static vs blower table Check for dirty air filter and clean or replace... - Page 53 Restricted metering device Check superheat and subcooling per chart - replace Check pump operation or water valve operation/setting Reduced water flow Plugged strainer or filter - clean or replace in heating Installation, Operation & Maintenance - HEH/HEV Compact Series Check water flow adjust to proper flow rate Water temperature out of range Bring water temp within design parameters Check for dirty air filter and clean or replace...
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Page 54: Start-Up Log Sheet
Installation, Operation & Maintenance - HEH/HEV Compact Series Start-Up Log Sheet Installer: Complete unit and system checkout and follow unit start-up procedures in the IOM. Use this form to record unit information, temperatures and pressures during start-up. Keep this form for future reference. Job Name: Street Address: Model Number:... -
Page 55: Functional Troubleshooting
Model Number: ________________________ Serial Number: ________________________ Installation, Operation & Maintenance - HEH/HEV Compact Series Date: ________________________ Packaged Unit Refrigeration Schematic Customer: _____________________________________ Antifreeze: ________________________ Model#: ________________________ Serial#: ________________ Loop type: _______________ Functional Troubleshooting Complaint: ________________________________________________________________________ HEATING CYCLE ANALYSIS - °F SUCTION COIL °F... - Page 56 Installation, Operation & Maintenance - HEH/HEV Compact Series Notes: I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e...
- Page 57 Installation, Operation & Maintenance - HEH/HEV Compact Series Notes: I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e...
- Page 58 Installation, Operation & Maintenance - HEH/HEV Compact Series Notes: I n s t a l l a t i o n , O p e r a t i o n , M a i n t e n a n c e...
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Page 59: 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 60: Revision History
Installation, Operation & Maintenance - HEH/HEV Compact Series Revision History Date: Item: Action: 7/8/21 Added Polymer drain pan 1/23/19 High Head Variable Pump update Pages 15,16, 25 11/7/18 Updated warter circuit options Decoder 10/26/18 Added disconnect to control Decoder 07/25/17 Update hanger and mounting instructions Page 7 10/7/16...