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INSTALLATION INSTRUCTIONS
7AH2AE
WARNING
Every working procedure that affects safety means shall
only be carried out by competent persons. This appliance
is not to be used by persons (including children) with
reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have
been given supervision or instruction concerning use of
the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not
play with the appliance.
CAUTION
Leak Detection System installed. Unit must be powered
except for service.
WARNING
Maximum Altitude of application is 3200m above sea
level.
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.
This manual must be left with the homeowner for future reference
Air Handler Units - R454B
Table of Contents
General Information .......................................................2
Shipping and Packing List .............................................2
Wiring Diagrams ............................................................3
Adjusting Blower Speed ................................................5
Requirements ................................................................8
Upflow and Downflow Unit Dimensions ......................10
sions ............................................................................ 11
Installing the Unit .........................................................12
Sensor / Bracket Installation .........................................15
Brazing Connections ...................................................17
Installing the Condensate Drain ..................................20
Inspecting and Replacing Filters .................................22
Sealing the Unit ...........................................................22
Making Electrical Connections ....................................23
Homeowner Maintenance ............................................25
Check-out Procedures .................................................25
Sensor Maintenance ....................................................26
Decommissioning ........................................................26
NOTE - This unit is a PARTIAL UNIT AIR CON DITIONER,
complying with PARTIAL UNIT requirements of this Stan-
dard, and must only be connected to other units that have
been confirmed as complying to corre sponding PARTIAL
UNIT requirements of this Standard, UL 60335-2-40/CSA
C22.2 No. 60335-2-40, or UL 1995/CSA C22.2 No 236.
Partial units shall only be connected to an appliance suit-
able for the same refrigerant.
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.
Servicing shall be performed only as recommended by
the manufacturer.
Ducts connected to an appliance shall not contain a
potential ignition source
*P508445-01*
Page 1
IMPORTANT
CAUTION
WARNING
(P) 508445-01
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Related Manuals for Lennox Allied Air Enterprises 7AH2AE
Summary of Contents for Lennox Allied Air Enterprises 7AH2AE
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS 7AH2AE Air Handler Units – R454B This manual must be left with the homeowner for future reference Table of Contents General Information ............2 Shipping and Packing List ..........2 Wiring Diagrams ............3 Adjusting Blower Speed ..........5 Requirements ..............8 Upflow and Downflow Unit Dimensions ......10 Horizontal Left- and Right-Hand Discharge Unit Dimen- sions ................ -
Page 2: General Information
WARNING WARNING • Do not use means to accelerate the defrosting pro- For duct connected appliances, false ceilings or cess or to clean, other than those recommended by drop ceilings may be used as a return air plenum if a the manufacturer. -
Page 3: Wiring Diagrams
Wiring Diagrams FIGURE 1. Typical System Wiring Diagram – 240V Page 3... - Page 4 FIELD WIRING FOR UNITS FIELD WIRING FOR WITHOUT CIRCUIT BREAKERS UNITS WITH CIRCUIT BREAKERS CIRCUIT 2 CIRCUIT 4 CIRCUIT 3 CIRCUIT 2 EQUIPMENT GROUND EQUIPMENT EQUIPMENT EQUIPMENT GROUND GROUND GROUND CONNECT POWER WIRES FROM HEATER LABELED L1, L2, L3 ON G VOLTAGE UNITS TO TB2 THE NUMBER OF CIRCUITS VARY ACCORDING TERMINAL STRIP IN INDOOR UNIT TO HEATER MODEL.
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Page 5: Adjusting Blower Speed
IMPORTANT INFORMATION FOR INSTALLER CHECK FOR AND REMOVE THESE ITEMS BEFORE OPERATING UNIT. TOP CAP SHIPPING BRACKET (REPLACE SCREWS IN TOP CAP AFTER REMOVAL) BLOWER HOUSING SUPPORT PAD DRIP SHIELD. (USED FOR -060 UNITS HORIZONTAL 13-15) APPLICATIONS ONLY.) (SEE PAGE 5.) SHOWN INSTALLED ON DRAIN PAN IN -060 UNIT. -
Page 6: Blower Data
BLOWER DATA 7AH2AE018 BLOWER PERFORMANCE External Air Volume and Motor Watts Static Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Pressure Watts Watts Watts Watts Watts in. w.g. 7AH2AE024 BLOWER PERFORMANCE External Air Volume and Motor Watts Static Tap 1 Tap 2 Tap 3... - Page 7 BLOWER DATA 7AH2AE036 BLOWER PERFORMANCE External Air Volume and Motor Watts at 208V Static Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Pressure Watts Watts Watts Watts Watts in. w.g. 1239 1301 1301 1447 1194 1264 1264 1411 1156 1229 1229...
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Page 8: Requirements
7AH2AE060 BLOWER PERFORMANCE External Air Volume and Motor Watts Static Tap 1 Tap 2 Tap 3 Tap 4 Tap 5 Pressure Watts Watts Watts Watts Watts in. w.g. 1354 1768 1954 1870 2148 1307 1742 1929 1845 2124 1267 1706 1898 1817 2097... - Page 9 These instructions are intended as a general guide and do IMPORTANT not supersede local or national codes in any way. Consult authorities having jurisdiction before installation. Excessive condensation may occur if the unit is installed in a warm, humid place. When the unit is installed in Compliance with all local, state, or national codes pertain- an unconditioned space, apply sealant around electrical ing to this type of equipment should be determined prior...
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Page 10: Upflow And Downflow Unit Dimensions
Upflow and Downflow Unit Dimensions PIPING PLATE DETAIL 3/4 (19) (FOR UP-FLOW AND DOWN-FLOW POSITIONS) 5/8 (16) SUPPLY AIR OPENING 4 3/8 (111) 1 1/8 (29) SUCTION LINE CONDENSATE DRAINS 5/8 (16) 5/8 (16) (2) (HORIZONTAL) 3/4 (19) Return Air Opening (51) LIQUID LINE 11 1/16 (281) -
Page 11: Horizontal Left- And Right-Hand Discharge Unit Dimensions
Horizontal Left- and Right-Hand Discharge Unit Dimensions 5 3/8 FILTER (137) (51) Horizontal Position LIQUID LINE (Right Hand Air SUCTION CONDENSATE Discharge) LINE DRAINS (2) (UP-FLOW Coil BLOWER 1 1/8 DOWN-FLOW) (29) CONDENSATE 4 3/8 DRAINS (2) (111) FOR DIMENSIONS “A” THROUGH (HORIZONTAL) “H”, SEE CHART ON PAGE 2. -
Page 12: Installing The Unit
1. The actual refrigerant charge is in accordance with the Installing the Unit room size within which the refrigerant containing parts are installed. These units are factory-configured for upflow and hori- zontal right-hand discharge installation. For downflow or 2. The ventilation machinery and outlets are operating horizontal left-hand discharge, certain field modifications adequately and are not obstructed. -
Page 13: Upflow Application
a leak is suspected, all naked flames shall be removed/ UPFLOW APPLICATION extinguished. If a leakage of refrigerant is found which Use the following procedures to configure the unit for up- requires brazing, all of the refrigerant shall be recov- flow operations: ered from the system, or isolated (by means of shut off 1 - Remove access panels. - Page 14 3 - No further adjustment is necessary. Set unit so that IMPORTANT it is sloped 1/4" towards the drain pan end of the unit. When removing the coil, there is possible danger of equipment damage and personal injury. Be careful when 4 - If the unit is suspended, the entire length of the removing the coil assembly from a unit installed in right- cabinet must be supported.
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Page 15: Downflow Application
13 - Set unit so that it is sloped 1/4ʺ toward the drain IMPORTANT pan end of the unit. Connect return and supply air plenums as required using sheet metal screws. After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any 14 - If suspending the unit, it must be supported along the debris. - Page 16 2 - Follow instructions for right-hand discharge as Downflow Configuration outlined in previous section on page 13. 1 - Remove sensor bracket assembly from vertical position. Do not remove sensor from bracket, and 3 - With air handler unit panels removed, install sensor do not disconnect or reroute sensor wire from the bracket assembly to the unit by lining up holes in control panel area.
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Page 17: Brazing Connections
WARNING Polyol ester (POE) oils used with R-454B refrigerant absorb moisture very quickly. It is very important that the refrigerant system be kept closed as much as possible. DO NOT remove line set caps or service valve stub caps until you are ready to make connections. WARNING Danger of fire. - Page 18 the suction line connection. The wet rag must be in IMPORTANT place to guard against damage to the paint. After completion of field piping for split systems, the 5 - With the wet rag in place, position a field provided field pipework shall be pressure tested with an inert gas elbow fitting to the air handler’s suction line and line and then vacuum tested prior to refrigerant charging,...
- Page 19 PLEASE READ IMPORTANT ISSUES CONCERNING BRAZING USE A WET RAG TO PROTECT CTXV SENSING BULB WHEN BRAZING SUCTION LINE CONNECTIONS. 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 20: Installing The Condensate Drain
BEST PRACTICES Installing the Condensate Drain The following best practices are recommended for the condensate removal process: MAIN DRAIN • Main and overflow drain lines should NOT be smaller Connect the main drain and route downward to drain line or sump. Do not connect drain to a closed waste system. than both drain connections at drain pan. - Page 21 METERS) LENNOX P-TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J-TRAP 91P90. PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4” I. D. X 5” - 34K7401 (1): CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MA IN DRAIN.
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Page 22: Making Electrical Connections
Select the proper supply circuit conductors in accordance Making Electrical Connections with tables 310-16 and 310-17 in the National Electric Code, ANSI/NFPA No. 70 or tables 1 through 4 in the Ca- WARNING nadian Electric Code, Part I, CSA Standard C22.1. Run 24V Class II wiring only through specified low The motor speed is set by the speed tap connection to the voltage opening. -
Page 23: Repairing Or Replacing Cabinet Insulation
Repairing or Replacing Cabinet Insulation Install room thermostat (ordered separately) on an inside wall approximately in the center of the conditioned area and 5 feet (1.5m) from the floor. It should not be installed on an outside wall or where it IMPORTANT can be affected by sunlight or drafts. -
Page 24: Inspecting And Replacing Filters
unit is installed in an unconditioned area. Inspecting and Replacing Filters IMPORTANT IMPORTANT Use duct tape and/ or Permagum to seal closed any Filter access panel must be in place during unit operation. space around the holes where the drain lines exit the Excessive warm air entering the unit may result in water cabinet. -
Page 25: Homeowner Maintenance
WARNING Failure to follow instructions will cause damage to the unit. Electric Shock Hazard. This unit is equipped with an aluminum coil. Can cause injury or death. Aluminum coils may be damaged by exposure to Foil-faced insulation conductive solutions with a pH below 5 or above 9. The alumi- characteristics similar to metal. -
Page 26: Sensor Maintenance
cording to these installation instructions. • Have all cabinet openings and wiring been sealed? • Ensure that sensor opening is clear and free of debris. • Is the indoor coil factory-installed TXV properly sized for the outdoor unit being used? Sensor Maintenance •... - Page 27 • the recovery process is supervised at all times by a competent person; • recovery equipment and cylinders conform to the appropriate standards. d) Pump down refrigerant system, if possible. e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. f) Make sure that cylinder is situated on the scales before recovery takes place.
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Page 28: Integrated Control
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...
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