Mars Comfort-Aire Century HE Series Installation, Operation And Maintenance Manual Download

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Installation, Operation

and Maintenance

HEH/HEV Series

Summary of Contents for Comfort-Aire Century HE Series

Page 1: ...www marsdelivers com Installation Operation and Maintenance HEH HEV Series...

Page 2: ...rical Low Voltage Wiring 27 Electrical Low Voltage Wiring for non vFlow Units Using External Motorized Water Valve 28 Electrical Thermostat Wiring 29 Blower Performance Data 30 ECM Blower Control 31 T...

Page 3: ...N w 1 Merv 8 Pleated Filter and Frame RETURNAIR OPTIONS R RIGHT RETURN w 1 Merv 8 Pleated Filter and Frame B BACK DISCHARGE HORIZONTALONLY SUPPLYAIR OPTIONS T TOP DISCHARGE VERTICALONLY S STRAIGHT DIS...

Page 4: ...tion or maintenance information which is important but which is not hazard related Inspection Upon receipt of the equipment carefully check the shipment against the bill of lading Make sure all units...

Page 5: ...system components Remove any dirt or debris found in or on these components Pre Installation Installation Operation and Maintenance instructions are provided with each unit Horizontal equipment is de...

Page 6: ...24 X 21 75 24 X 21 75 28 75 X 24 28 75 X 24 Standard Filter 1 25 4mm Throwaway qty in 20x20 20x20 24x24 24x24 28x28 28x28 Weight Operating lbs 224 224 249 260 315 330 Weight Packaged lbs 229 229 255 2...

Page 7: ...or easy removal of the filter and access panels Provide sufficient room to make water electrical and duct connection s If the unit is located in a confined space such as a closet provisions must be ma...

Page 8: ...g louvered door Therefore filter rails are the industry standard and are included on Comfort Aire Century commercial heat pumps for the purposes of holding the filter only For ducted return applicati...

Page 9: ...set aside Lift and rotate the discharge panel to the other position as shown being careful with the blower wiring 3 Check blower wire routing and connections for tension or contact with sheet metal ed...

Page 10: ...rflow for the unit to avoid equipment damage Duct systems should be designed for quiet operation Refer to Figure 3 for horizontal duct system details or Figure 7 for vertical duct system details A fle...

Page 11: ...should be removed prior to setting the unit Refer to Figures 7 and 8 for typical installation illustrations Refer to unit submittal data or engineering design guide for dimensional data 1 Install the...

Page 12: ...installed with its own individual vent where necessary and a means to flush or blow out the condensate drain line Do not install units with a common trap and or vent Vent 3 4 FPT 3 4 PVC Alternate Co...

Page 13: ...Insulation is required if loop water temperature drops below the dew point insulation is required for ground loop applications in most climates Pipe joint compound is not necessary when Teflon thread...

Page 14: ...erature delta T This valve is a standard factory installed feature for the HE unit 2 High System Pressure Drop Modulating Motorized Valve Typical for High Pressure Water System such as Water Well Pump...

Page 15: ...63 3 76 4 7 200 9 0 3 67 8 47 4 7 200 12 0 6 52 15 06 060 7 4 200 7 0 89 2 06 7 4 200 10 5 2 01 4 64 7 4 200 14 0 3 58 8 26 Model CV MOPD WPD Adders GPM PSI FT 024 4 7 200 3 0 0 41 0 94 4 7 200 4 5 0...

Page 16: ...16 Installation Operation Maintenance HEH HEV Series High Head Variable Pump Performance 30 35 40 45 50 25 20 15 10 5 0 0 5 10 15 Head feet GPM 20 25...

Page 17: ...n material prior to operation see Piping System Cleaning and Flushing Procedures in this manual The flow rate is usually set between 2 25 and 3 5 gpm per ton 2 9 and 4 5 l m per kW of cooling capacity...

Page 18: ...equired Alcohols and glycols are commonly used as antifreeze however your local sales office should be consulted to determine the antifreeze best suited to your area Freeze protection should be mainta...

Page 19: ...r Isolation Water In Ground Water Heat Pump Applications Typical Open Loop Well unit with internal modulating water valve High and Low Voltage Knockouts Vibration Isolation Pad To Thermostat Internal...

Page 20: ...ted for water quality requirements Scaling potential should be assessed using the pH Calcium hardness method If the pH 7 5 and the calcium hardness is less than 100 ppm scaling potential is low If thi...

Page 21: ...ires a flow control device mounted on the outlet of the water control valve The device is typically a brass fitting with an orifice of rubber or plastic material that is designed to allow a specified...

Page 22: ...Levels 10 C 24 C 38 C Copper Cupronickel 20ppm NR NR 150 ppm NR NR 304 SS 400 ppm 250 ppm 150 ppm 316 SS 1000 ppm 550 ppm 375 ppm Titanium 1000 ppm 550 ppm 375 ppm Erosion and Clogging Particulate Siz...

Page 23: ...ding General Line Voltage Wiring Be sure the available power is the same voltage and phase shown on the unit serial plate Line and low voltage wiring must be done in accordance with local codes or the...

Page 24: ...oltage 460 vac units require a four wire power supply with neutral ECM motor and optional circulating pumps are rated 265 vac and are wired between one hot leg and neutral Units with Modulating Motori...

Page 25: ...29 0 45 Wire length based on one way measurement with 2 voltage drop Wire size based on 60 C copper conductor All fuses Class RK 5 Units with Standard Head Variable Pump Model Voltage Code Voltage Vol...

Page 26: ...d connections that must be made by the installing or electrical contractor All final electrical connections must be made with a length of flexible conduit to minimize vibration and sound transmission...

Page 27: ...y Relay 2 Configuration Accessory Relay 1 Configuration DIP 2 1 DIP 2 2 DIP 2 3 ACC1 Relay Option ON ON ON Cycle with fan OFF ON ON N A for Residential Applications ON OFF ON Water valve Slow opening...

Page 28: ...ure 20 Taco SBV Valve Wiring From Water Source IN OUT NOTE Shut off valves strainers and other required components not shown Solenoid Valve Flow Regulator To Discharge Stage 1 Stage 2 Figure 21 Two St...

Page 29: ...rates with dehumidification airflows in the cooling mode when the dehumidification output from thermostat is active Normal heating and cooling airflows are not affected 2 DXM2 board DIP switch S2 7 mu...

Page 30: ...36 0 6 1 2 Default 1125 750 975 650 1125 750 525 1125 Maximum 1250 950 1200 800 1250 1250 1250 1250 Minimum 900 600 900 600 900 600 450 900 042 0 6 3 4 Default 1300 925 1125 825 1300 925 600 1300 Maxi...

Page 31: ...Mode Y1 Y2 O Dehumid First Stage Heating Y1 Second Stage Heating Y1 Y2 Third Stage Auxiliary Heating Y1 Y2 W Emergency Heating W with no Y1 or Y2 Fan G with no Y1 Y2 or W It is highly recommended that...

Page 32: ...32 Installation Operation Maintenance HEH HEV Series Typical Wiring Diagram Single Phase Unit...

Page 33: ...33 Installation Operation Maintenance HEH HEV Series Typical Wiring Diagram Three Phase Unit...

Page 34: ...34 Installation Operation Maintenance HEH HEV Series Typical Wiring Diagram 460 Volt Unit...

Page 35: ...e In the following field configuration options DIP switches should only be changed when power is removed from the DXM2 control DIP Package 1 S1 DIP Package 1 has 8 switches and provides the following...

Page 36: ...g cooling stage 2 IF the H input is active In high fan mode the fan enable and fan speed relays will turn on when the H input is active On Auto dehumidification mode default Off High fan mode 2 8 Spec...

Page 37: ...t Mode Active Fault LED Red Status LED Green Alarm Relay No Fault Since Power Up In Memory Flashing Code 1 Cycling Code 1 High Pressure Fault In Memory Flashing Code 2 Cycling Code 2 Low Pressure Faul...

Page 38: ...nd P8 IN NC P12 1 Note There is only one T1 connection 1 2 3 4 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Service tool connection Communicating stat connection Conventional stat connection Cabinet temperature se...

Page 39: ...elay at power up The first time after power up that there is a call for compressor the compressor will follow a 5 to 80 second random start delay After the random start delay and anti short cycle dela...

Page 40: ...1 159 8 1 69 2 35 6 29 50 72 161 6 1 64 3 37 4 28 05 73 163 4 1 58 4 39 2 26 69 74 165 2 1 53 5 41 0 25 39 75 167 0 1 48 6 42 8 24 17 76 168 8 1 43 7 44 6 23 02 77 170 6 1 39 8 46 4 21 92 78 172 4 1 3...

Page 41: ...its HE Cooling Heating Air Limits Min ambient air DB Rated ambient DB Max ambient air DB Min entering air DB WB Rated entering air DB WB Max entering air DB WB 45 F 7 C 80 6 F 27 C 130 F 54 4 C 65 45...

Page 42: ...riod shut off the circulating pump and drain the solution Repeat system cleaning if desired 8 When the cleaning process is complete remove the short circuited hoses Reconnect the hoses to the proper s...

Page 43: ...flushing Verify that all hoses are connected end to end when flushing to ensure that debris bypasses the unit heat exchanger water valves and other components Water used in the system must be potable...

Page 44: ...to table 10 In S I units the formula is as follows HR kW TD x l s x 4 18 f Check air temperature drop across the air coil when compressor is operating Air temperature drop should be between 15 F and...

Page 45: ...F 024 Rev B 2 5 3 0 3 8 4 5 6 0 0 8 1 2 1 8 2 7 3 9 0 3 0 6 1 1 1 6 2 8 0 2 0 5 0 9 1 2 2 2 0 2 0 5 0 8 1 2 2 0 030 3 0 3 8 4 5 6 0 7 5 1 7 2 3 2 7 3 8 5 1 0 9 1 2 1 6 2 4 3 5 0 8 1 1 1 4 2 2 3 1 0 8...

Page 46: ...1 381 370 390 9 14 10 15 10 15 14 19 14 19 14 19 13 2 15 2 9 0 11 0 4 8 6 8 24 29 25 30 26 31 70 1 5 2 25 3 128 138 124 134 119 129 310 330 290 310 270 290 10 15 10 15 11 16 11 16 10 15 8 13 19 21 14...

Page 47: ...10 15 8 4 10 4 6 0 8 0 3 6 5 6 19 24 20 25 20 25 50 1 5 2 25 3 120 130 120 130 118 128 225 245 222 242 220 240 9 14 9 14 9 14 13 18 10 15 9 14 21 8 23 8 14 7 16 7 8 7 10 7 20 25 20 25 20 25 94 104 100...

Page 48: ...d without a filter Washable high efficiency electrostatic filters when dirty can exhibit a very high pressure drop for the fan motor and reduce air flow resulting in poor performance It is especially...

Page 49: ...each component to the board Therefore continuity on pressure switches for example can be checked at the board connector The thermistor resistance should be measured with the connector removed so that...

Page 50: ...u For more detailed information on the advanced diagnostics of the DXM2 see the DXM2 Application Operation and Maintenance AOM manual part 97B0003N15 DXM2 Troubleshooting Process Flowchart Functional...

Page 51: ...id Unit Lockout at Start up Unit Short Cycles Only Fan Runs Only Compressor Runs Did unit lockout after a period of operation Does unit operate in cooling Unit is OK See Performance Troubleshooting fo...

Page 52: ...estrictions Too high of external static Check static vs blower table X Air Temperature out of range Too much cold vent air Bring entering air temp within design parameters X Improper temperature limit...

Page 53: ...ult Rooftop units only Troubleshoot ERV unit fault No Fault Code Shown X X No compressor operation See Only Fan Operates Compressor overload Check and replace if necessary Control board Reset power an...

Page 54: ...und moisture X Air temperature out of range in heating Bring return air temp within design parameters X Scaling in water heat exchanger Perform Scaling check and clean if necessary X X Unit over charg...

Page 55: ...static check static vs blower table X X Leaky duct work Check supply and return air temperatures at the unit and at distant duct registers if significantly different duct leaks are present X X Low re...

Page 56: ...C Antifreeze Pressures PSIG or kPa Type Cooling Mode Heating Mode Entering Fluid Temperature Leaving Fluid Temperature Temperature Differential Return Air Temperature DB WB DB Supply Air Temperature...

Page 57: ...AT PSI SAT F F AIR COIL F F FP2 HEATING LIQUID LINE F EXPANSION VALVE AIR COIL F F PSI SAT PSI SAT F F F F WATER IN WATER OUT PSI PSI F F WATER IN WATER OUT PSI PSI Use 500 for water 485 for antifreez...

Page 58: ...date of shipment from the factory REMEDY PROVIDED BY THE LIMITED EXPRESS WARRANTY The sole remedy under the Limited Warranty is replacement of the defective part If replacement parts are required with...

Page 59: ...to 04 15 16 Text Updated 06 09 15 Decoder Page 3 Text Page 24 25 Updated 05 12 15 Decoder Page 3 Changed to Rev C 12 17 14 Table Page 6 Updated 06 10 14 Pages 8 11 12 15 20 22 25 32 33 34 Misc edits 0...

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