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This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting
of refrigerant (CFCs, HCFCs and HFCs) as of July
1, 1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
507788-01P
INSTALLATION INSTRUCTIONS
HMGX*P Series Air Handler
This manual must be left with the homeowner for future reference.
Save these instructions for future reference
Table of Contents
Shipping and Packing List ...........................................3
General ........................................................................3
Requirements ..............................................................3
Installation Clearances ................................................4
Installation ...................................................................4
Condensate Drain........................................................6
Duct System and Filters .............................................8
Brazing Refrigerant Lines ............................................9
Sealing the Unit .........................................................11
Electrical Connections ...............................................11
Blower Performance Data .........................................15
Air Flow - Cooling Blower Speed ...............................16
Operation Inspection .................................................16
Operation ...................................................................17
Maintenance ..............................................................17
Professional Maintenance .........................................17
Cabinet Insulation ......................................................18
Use of Air Handler During Construction.....................18
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
*P507788-01P*
Issue 1818
CAUTION
Manufactured By
Comfort-Aire / Century
1900 Wellworth Ave.
Jackson, MI 49203
(P) 507788-01P
Page 1 of 20
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Related Manuals for COMFORT-AIRE HMGX P Series
Summary of Contents for COMFORT-AIRE HMGX P Series
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Page 1: Table Of Contents
HVAC installer or and protective clothing. equivalent, service agency, or the gas supplier. Manufactured By Comfort-Aire / Century 1900 Wellworth Ave. Jackson, MI 49203 IMPORTANT The Clean Air Act of 1990 bans the intentional venting... -
Page 2: Hmgx*P Unit Dimensions - Upflow - Inches (Mm)
HMGX*P Unit Dimensions – Upflow – Inches (mm) 1 (25) DETAIL OF PIPING PLATE 4-3/4 3/4 (19) (121) SUCTION LINE SUPPLY AIR LIQUID OPENING CONDENSATE LINE 14-1/2 DRAINS (2) (368) 2-3/8 (Horizontal) (60) 1 (25) 1 (25) CONDENSATE DRAINS (2) 4-3/8 (Upflow and (111) -
Page 3: Shipping And Packing List
Compliance with all local, state, or national codes Shipping and Packing List pertaining to this type of equipment should be determined prior to installation. Read this instruction manual, as well Package 1 of 1 contains: as the instructions supplied in separate equipment, before starting the installation. -
Page 4: Installation Clearances
Louvers or return air grilles are field-supplied. Local codes may limit application of systems without a ducted return to IMPORTANT single-story buildings. Excessive condensation may occur if the unit is installed When a HMGX*P unit is installed in a closet with a louvered in a warm, humid place. - Page 5 Upflow Application Set unit so that it is sloped toward the upflow drain pan end of the unit and level from front to back of unit (see The air handler must be supported on the bottom only Figure 7). and set on solid floor or field-supplied support frame. Securely attach the air handler to the floor or support The horizontal configuration is shown in Figure 2.
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Page 6: Condensate Drain
NOTE: Seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air. TOP CAP ROTATED TO CORRECT POSITION Flip access door and replace it on the unit. TOP CAP SCREWS CABINET SUPPORT 10. Set unit so that it is sloped 1/4ʺ toward the drain pan end of the unit. - Page 7 OVERFLOW DRAIN LINE ABOVE ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO FINISHED ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE SPACE? VENT MUST EXTEND OVERFLOW SWITCH KIT. WIRE SHUT DOWN ABOVE HEIGHT OF COMPRESSOR PER INSTRUCTIONS. COIL DRAIN PAN BY TWO INCHES (51MM) VENT PART #...
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Page 8: Duct System And Filters
Install properly sized, field-provided connection fittings Duct System and Filters and connect primary drain line to the main drain pan connection. NOTE: When installing drain line connection fittings Duct System to the drain pan, hand tighten the fitting and use a The air handler is provided with flanges for the connection thread sealant. -
Page 9: Brazing Refrigerant Lines
NOTE: Recommended line length is 50’ or less. If more Polyol ester (POE) oils used with HFC-410A refrigerant than 50’ line set is required, contact Comfort-Aire / Century. absorb moisture very quickly. It is very important that the refrigerant system be kept closed as much as possible. - Page 10 PLEASE READ IMPORTANT ISSUES CONCERNING BRAZING OPERATIONS IN THE BRAZING REFRIGERANT LINES SECTION BEFORE PROCEEDING. NOTE - REFER TO OUTDOOR UNIT INSTALLATION INSTRUCTIONS FOR REFRIGERANT PIPING SIZE REQUIREMENTS. NOTE - Use silver alloy brazing rods with five or six percent minimum silver alloy for copper-to-copper brazing, 45 percent alloy for copper-to-brass and copper-to-steel brazing.
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Page 11: Sealing The Unit
To avoid damaging the rubber grommets in the cabinet Electrical Connections while brazing, slide the rubber grommets over the refrigerant lines until they are away from the heat source. WARNING NOTE: Place wet rags against piping plate and around suction line connections. Electric shock hazard! - Disconnect all power supplies before servicing. - Page 12 • Electrical wiring, disconnect means and over- NOTE: To avoid the possibility of moisture damage to the current protection are to be supplied by the control in some right-hand discharge configurations, the installer. Refer to the air handler rating plate control panel can be relocated to the end panel as shown for maximum over-current protection, minimum in Figure 12.
- Page 13 Figure 14. Typical Wiring Diagram – HMGX*P Air Handler with Electric Heat – (Constant Torque Motor) 507788-01P Issue 1818 Page 13 of 20...
- Page 14 NOTE Figure 15. Low Voltage Connections (Constant Torque Motor) Page 14 of 20 Issue 1818 507788-01P...
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Page 15: Blower Performance Data
Blower Performance Data External Static Pressure (in. w.c.) Speed Application Fan Only Matched with 1.5 ton condensing unit Nominal 2 ton match without electric heat Nominal 2 ton match with electric heat 1040 1020 High static application 1160 1140 1120 1080 1050 Fan Only... -
Page 16: Air Flow - Cooling Blower Speed
Air Flow - Cooling Blower Speed Operation Inspection The cooling blower speed is factory configured to provide NOTE: Refer to outdoor unit installation instructions for correct air flow for an outdoor unit that matches the cooling system start-up instructions and refrigerant charging capacity rating of the air handler (Tap 3). -
Page 17: Operation
Check Electric Heat (If Used) Emergency Heat (Heating Heat Pump) 1. Set thermostat to call for auxiliary heat (approximately If the selector switch on the thermostat is set to the 5°F above ambient temperature). The indoor blower emergency heat position, the heat pump will be locked out and auxiliary heat should come on together. -
Page 18: Cabinet Insulation
Cabinet Insulation Use of Air Handler During Construction It is not recommended to use this air handler unit during any phase of construction. Very low return air temperatures, IMPORTANT harmful vapors and operation of the unit with clogged or DAMAGED INSULATION MUST BE REPAIRED OR misplaced filters will damage the unit. - Page 19 Installing Contractor’s Name_______________________ Installing Date_______________________________ Installing Contractor’s Phone_______________________ Air Handler Model #___________________________ Job Address____________________________________ Thermostat Line Voltage SUPPLY Disconnect Switch Integrated Control Temperature Duct Blower Motor Amps System Electric Heat Amps Duct Static RETURN Filter Drain Line DUCT SYSTEM TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil SUPPLY AIR DUCT...
- Page 20 Installing Contractor’s Name_______________________ Installing Date_______________________________ Installing Contractor’s Phone_______________________ Air Handler Model #___________________________ Job Address____________________________________ Line Voltage Disconnect Switch Thermostat Integrated Control Duct System Duct System Filter RETURN SUPPLY Electric Heat Amps Blower motor Amps Drain Line Duct Static Temperature DUCT SYSTEM TOTAL EXTERNAL STATIC (dry coil) dry coil wet coil...
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