18-AH36D1-1 Installer’s Guide A341869P13

1 installer s GuideA341869P13 ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODESIMPORTANT This Document is customer property and is to remain with this unit. Please return to service informa-tion pack upon completion of "Convertible" Cased Coils2/4 TXCA018AC3 HCAA2/4 TXCA024AC3 HCAA2/4 TXCB025AC3 HCAA2/4 TXCB031AC3 HCAA2/4 TXCB036AC3 HCAAF igure 1b. Apply gasket material (duct seal field supplied) to ALLmating surfaces between the furnace and the coil case. c. Set the coil case on top of the furnace. d. Reinstall the flue pipe (If removed).2. UPFLOW GAS FURNACE - Add-on Coolinga. Turn furnace power OFF and remove the flue pipe Disconnect and remove a sufficient portion of the supplyductwork to provide clearance for the cased coil.

2 C. Install the cased coil following the Installation Instruc-tion section D-1 of these instructions. d. Reconnect the ductwork to the coil case. e. Replace the furnace flue pipe if it has been removed andfasten it securely. f. Turn the furnace power GENERALT hese coils are designed for use in combination with a heatpump or cooling outdoor section using R-22 (2 TXC) or R-410A (4 TXC) REFRIGERANT. These coils may be con-verted for use with a horizontal furnace as 2/4 TXC equipment has been evaluated in accordancewith the Code of Federal Regulations, Chapter XX, Part 3280or the equivalent. Suitable for Mobile Home use The heightof the Furnace, Coil and discharge duct work must be 7 ft.

3 The coil for shipping damaged. Notify the transporta-tion company immediately if the coil is APPLICATION INFORMATION1. FURNACE AND COILThe coil MUST BE installed downstream (in the outlet air) ofthe coils fit the 14 " , 17 " , 21", 24 " " width furnaces withoutany adapters in vertical upflow, downflow, or INDOOR UNIT AIRFLOWI ndoor unit must provide the required airflow for the heatpump or cooling combinations approved for these : Review your installation requirements. Checkthe table on the outline drawings and note all dimensions foryour coil before beginning the RECOMMENDATIONIf a coil is part of the total system installation, use theInstaller s Guide packaged with the furnaces, and outdoorsections, and thermostat for physically installing those INSTALLING THE COILS1.

4 UPFLOW GAS FURNACE - 2/4 TXCa. Be sure the furnace is turned off and the flue pipe isremoved if it is in the 2005 American Standard Inc. All Rights Reserved18-AH36D1-1 installer s GuideStandoffs and screws (See Figure 2) are included with thecased coils for attachment to the furnace. There are clearancealignment holes near the bottom of the coil wrapper. Drillscrews are used to engage the top flanges of the furnace. Thestandoff is inserted into the cabinet alignment hole (SeeFigure 3). The drill screws are inserted through the standoffsthen screwed into the furnace top flange. The coil is alwaysplaced downstream of the furnace airflow.

5 The above instruc-tions apply if the coil is on top of an upflow furnace. The coiland furnace must be fully supported when used in the hori-zontal. The standoffs and screws are strictly for securingalignment, not for support in (BOTH SIDES)STANDOFFS(BOTH SIDES)STANDOFFS (4)DRILL SCREWS (4)FOR VERTICALINSTALLATIONS:c. Set the furnace on top of the coil case, making sure thatthe back side of the discharge opening is snug up against theduct flange at the top rear of the coil Secure the coil case to the DOWNFLOW GAS FURNACE -- Add On Coolinga. Turn the furnace power OFF, remove the flue pipe, anddisconnect the fuel and power Raise the furnace to provide sufficient clearance to mountthe coil case beneath it.

6 Modifications will be required to theexisting return air ductwork to permit the furnace to Place the coil case on the furnace supply air Secure the coil case to the Set the furnace on top of the coil case, making sure thatthe back side of the discharge opening is snug up against theduct flange at the top rear of the coil Reconnect the flue pipe and the fuel and power Turn the furnace power FURNACE IN HORIZONTAL POSITION - 2/4 TXCThe noncondensing forty inch (40") height furnaces may belaid on either side for horizontal application. The forty inch(40") height condensing downflow/horizontal and upflow/hori-zontal furnaces may only be rotated onto their left side.

7 Theconnection brackets for horizontal coil use are included withthe downflow furnaces. (See Figures 4 and 5)Caution: Both the coil and furnace must be fully sup-ported. Do not attempt to suspend the coil using The 2/4 TXC coil case is rotated so the apex of the coil is awayfrom the furnace and the auxiliary drain pan is now on thelower DOWNFLOW GAS FURNACEWhen a coil is used with a downflow furnace, a subbase isnot required between the coil case and combustible Place the coil case on the furnace supply air Secure the coil case to the 3 StandoffDrill ScrewAlignment HolesFigure 4 CASED COIL CONNECTIONBRACKET FOR DOWNFLOWFURNACE IN HORIZONTAL5 Comfort TM coilCASED COIL SHOWN INSTALLED HORIZONTALLY WITH A DOWNFLOWFURNACE AND HORIZONTAL ALIGNMENT BRACKETSBRACKETS SHIP WITH DOWNFLOW FOR ALIGNMENTON HORIZONTAL COIL18-AH36D1-13 installer s GuideIMPORTANT:The 2/4 TXC cased coil must be placed downstream of thefurnace, with the apex of the coil always pointing in thedirection of the airflow for horizontal installation.

8 The2/4 TXC cased coil may be installed with upflow or downflowfurnace models that provide horizontal right airflow applica-tions. However, the coil must be rotated 180 degrees placingthe coil service access opposite the furnace service Figure The base of the coil enclosure is placed flush against thedownflow/horizontal furnace. Upflow/horizontal condensingfurnaces have the coil match the top There are three brackets included with the furnace whichare used to connect the furnace and coil together. See connection will use two existing screws on the coil enclo-sure (one on each of the sides at the bottom) and the remainingscrews needed are included with the Two rear brackets are used and one front bracket.

9 Each ofthe rear side brackets will be attached by two additionalscrews. One in the coil enclosure and one in the furnace. SeeFigure The front bracket is positioned with the narrow edgeagainst the coil enclosure and the wide edge against thefurnace . Two screws each are driven into the coil enclosureand There is a splash guard packaged with the coil. This guardis for horizontal coil installation only. The guard has a bendwhich is inserted into the front channel of the horizontal drainpan on the outlet air side of the coil case. The guard is thenrotated downward until it rests in the drain pan. One sheetFigure 7metal screw is driven through the coil case duct flange on thefront side and into the splash guard side hole.

10 See Figure INSTALLING REFRIGERANT LINESThe following steps are to be considered when installing therefrigerant lines:a. Determine the most practical way to run the Consider types of bends to be made and space : Large diameter tubing sizes will be difficult to rebendonce it has been Determine the best starting point for routing the refriger-anttubing --INSIDE OR OUTSIDE THE Provide a pull through hole of sufficient size to allow bothliquid and gas lines to clear. The location of this hole (ifpractical) should be just above the wall plate which is restingon the Be sure the roll of tubing is of sufficient Uncoil the tubing - do not kink or dent.