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10 & 12 SEER
AIR HANDLER
INSTALLATION & SERVICE MANUAL
MODELS: AH1-A, AH2-A
PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION AND BEFORE
PERFORMING ANY SERVICE OR MAINTENANCE. THESE INSTRUCTIONS MUST
BE LEFT WITH THE USER AND SHOULD BE RETAINED FOR FUTURE
REFERENCE BY QUALIFIED SERVICE PERSONNEL.
: Improper installation, adjustment, alteration, service, or maintenance can
cause injury or property damage. Refer to this manual. For assistance or additional
information c
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TABLE OF CONTENTS SECTION BEGINNING PAGE SAFETY SECTION 1 KNOCKDOWN OF AIR HANDLER 3 REASSEMBLY OF AIR HANDLER 3 INSTALLATION OF A-COIL IN A VERTICAL APPLICATION 3 INSTALLATION OF A-COIL IN A HORIZONTAL APPLICATION 4 INSTALLATION OF HOT WATER COIL 6 BLOWER AIR ADJUSTMENT 7 DUCT SYSTEM 9 CFM CAPACITY CHARTS 10 DUCT SIZING CHART 11 INDOOR EVAPORATOR CO
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All installations and services must be performed by qualified personnel. SAFETY SECTION This page contains various warnings and cautions found throughout this Service and Installation Manual. Please read and comply with the statements on the cover and the statements below. : Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service ag
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All installations and services must be performed by qualified personnel. Installation and service personnel are required by some states to be licensed. Persons not qualified shall not install this equipment nor interpret these instructions. All local codes and regulations take precedence over the instructions in this manual and should be followed accordingly. In the absence of local codes, installation must conform with these instructions, regulations of the National Fire Protection Assoc
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All installations and services must be performed by qualified personnel. FOLLOW THESE STEPS FOR KNOCKDOWN OF AIR HANDLER: 1. Start with unit setting in a vertical position. (Figure A) 2. Remove screws from bottom door, middle door, top door, and top front panel. Remove doors and top panel of air handler. 3. Disconnect blower leads from blower terminal strip. 4. Remove screws that secure the blower pan to the side casings and the back casing. 5. Pull blower sub-assembly up and o
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All installations and services must be performed by qualified personnel. INSTALLATIONS OF A-COIL IN HORIZONTAL APPLICATION For the AH1-A, in all A-coil applications (1024E, 1030E, 1036E, and 1224-30G1) except the 1236G1, the A-coil spacer must be used. For the AH2-A, in all A-coil applications the A-coil spacer must be used. 1. Remove bottom door of air handler. 2. Remove middle door of air handler. 3. Slide primary drain pan out of unit. 4. Set A-coil spacer in primary
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All installations and services must be performed by qualified personnel. 13. Position grommets in coil access panel to allow installation of trim plate, secure trim plate in place with screws, and seal connections with duct sealer or equivalent. NOTE: The air handler is factory assembled for left to right(horizontal) and vertical applications. If a right to left horizontal application is desired, the fan center must be moved to the right side casing which will position it above the
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All installations and services must be performed by qualified personnel. Figure B3 INSTALLATION OF THE HOT WATER COIL: 1. Remove top door of air handler. 2. Slide hot water coil's side hanger brackets into coil channel(retaining channel) in the air handler. See Figure B4 inset. Figure B4 3. Push coil into unit until the coil is stopped by the back casing. 4. Cut out appropriate holes in insulation, realign top door and secure into place. 6
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All installations and services must be performed by qualified personnel. 5. Make appropriate hydronic connections to inlet(blower side) and outlet(duct side) of coil and braze into place. 6. Seal connections through panel with duct sealer or equivalent. : If drilling or screwing into panel or plate is necessary, make certain drill does not penetrate into any part of evaporator coil or hot water coil. Personal injury and/or property damage may result. Figure C NOTE: Drain lines mu
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All installations and services must be performed by qualified personnel. 1. Determine the appropriate blower speed settings listed in tables below. 2. Set the blower motor speed to match air conditioning requirement, connect the red wire(cooling tap) to the appropriate fan speed on the terminal strip located on the blower(see Figure D). 3. Set the blower motor speed to match heating requirement, connect the orange wire(heating tap) to the appropriate fan speed on the terminal strip
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All installations and services must be performed by qualified personnel. Recommended Heating Capacity Water Flow Rates (btuh) for Heating (GPM) 40,000 4 60,000 6 80,000 8 100,000 10 DUCT SYSTEM The duct system and load sizing calculation should follow the design standards of Air Conditioning Contractors of America (ACCA) - manuals D & J - or the American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc. (ASHRAE) Latest Edition Fundamentals
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All installations and services must be performed by qualified personnel. CFM CAPACITY CHARTS AH1-A .2 Duct Static Pressure with heating coil And applicable Evaporator Coil Model CFM (HI) CFM (M. HI) CFM (M. LOW) CFM (LOW) 1024E and 1030E 1299 1123 992 821 1224-30G1 1756 1202 1073 880 1036E 1435 1231 1055 861 1236G1 1438 1193 1036 860 .2 Duct Static Pressure and applicable Air Conditioning Coil Only 1024E and 1030E 1390 1243 1085 905 1224-30G1 1591 1335 986 921 1036E 1575 1307 1092 9
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All installations and services must be performed by qualified personnel. DUCT SIZES FOR HOMES Velocity Approximately 800 Feet Per Minute THE INDOOR EVAPORATOR COIL 1. EVAPORATOR COIL is a finned coil through which air in the home is circulated. Heat from the air is transferred to the liquid refrigerant inside the evaporator coil. The coils for use in AH air handlers are in an A-shaped configuration (A Models). 2. CONDENSATE DRAIN PAN is attached to the bottom of the evaporator coil
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All installations and services must be performed by qualified personnel. TUBING LINE SETS 1. SUCTION LINE is an insulated large copper tube connecting the outlet of the A/C evaporator to the suction inlet of the A/C CONDENSER. 2. LIQUID LINE is a single small tube connecting the outlet of the A/C condenser to the expansion valve inlet on the A/C evaporator coil. TUBING SIZE REFERENCE CHART 0’-50’ TOTAL LINE LENGTH MODEL SUCTION LINE LIQUID LINE 1024 & 1030 3/4” 3/8” 1
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All installations and services must be performed by qualified personnel. 75’-100’ TOTAL LINE LENGTH MODEL SUCTION LINE LIQUID LINE 1224 & 1230 1” 1/2” 1236 & 1242 1-1/8” 5/8” NOTES: For line lengths over 25’ adjust charge accordingly per foot of variation from chart. .65 oz. per foot for 3/8” and 3/4” line set .674 oz. per foot for 3/8” and 7/8” line set .694 oz. per foot for 1/2” and 7/8” line set .72 oz. per foot for 1/2” and 1” line set .76 oz. per foot f
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All installations and services must be performed by qualified personnel. Figure F 2. A trap is necessary in the suction line at the indoor evaporator coil if the indoor evaporator coil is more than 4 feet below the outdoor condensing unit. NOTE: Multiple suction line traps are recommended for longer or multiple horizontal lines. (See Fig. G1). An inverted trap should be installed on the horizontal suction line near the evaporator coil to prevent liquid flood back to the compressor (See
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All installations and services must be performed by qualified personnel. A gradual loop in the tubing can be constructed to take up the excess tubing if you find that too much tubing has been brought onto a job. Such a loop MUST be kept in a horizontal (flat) plane to avoid trapping the oil. Refrigerant lines should be inserted into a suitable conduit or raceway when the lines are to be buried between the building and the outdoor condensing unit. The lines must be provided with sufficient
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All installations and services must be performed by qualified personnel. Read the temperature at header assembly to calculate the superheat. Then read the suction pressure and then add the line loss of 2 lbs. for 25’ of tubing. Then convert pressure into temperature. Next, subtract the converted suction temperature from the measured coil header temperature and the end result is the superheat. EXAMPLE: o Measured Temp = 50 F (Off header assembly at 10:00 or 2:00 position) See Figur
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All installations and services must be performed by qualified personnel. The following points must be checked by the installer and/or electrician before the air conditioning system is started: 1. Check every electrical connection of "PUSH-ON" or "SCREW-ON" terminals to ensure it is on tightly on its proper post. 2. Review wiring diagram for proper routing. A loose terminal will cause poor flow of electrical power and result in very high current draw. This can lead to blown fuses or b
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All installations and services must be performed by qualified personnel. A return air opening can be cut in any of the four sides or the bottom of the UA cabinet. The AH AIR HANDLER is then placed on the UA adapter cabinet, inlet side down. The AH rests on the support angles of the UA adapter cabinet. The UA cabinet is equipped with a permanent washable air filter. When using the UA air handler, the coil drain and coil drain pan must be utilized in place of the primary drain and primary d
