Carrier CRHEATER136A00 Installation Instructions Manual

Contents

installation instructions

Cancels: IIK 542F-150-4 IIK 542J-150-131/15/99Installation InstructionsPart No. CRHEATER136A00 through CRHEATER143A00SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipmentcan be hazardous due to system pressure and electrical com-ponents. Only trained and qualified service personnel shouldinstall, repair, or service air-conditioning equipment.Untrained personnel can perform basic maintenance func-tions of cleaning coils and filters and replacing filters. Allother operations should be performed by trained service per-sonnel. When working on air-conditioning equipment, ob-serve precautions in the literature, tags and labels attachedto the unit, and other safety precautions that may apply.Follow all safety codes. Wear safety glasses and work gloves.Use quenching cloth for unbrazing operations. Have fire ex-tinguishers available for all brazing operations.Before performing service or maintenance operations onunit, turn off main power switch to unit. Electrical shockcould cause personal injury.GENERALThis installation instruction covers accessory electric heaterpackage numbers CRHEATER136A00, CRHEATER137A00,CRHEATER138A00, CRHEATER139A00, CRHEATER-140A00, CRHEATER141A00, CRHEATER142A00, andCRHEATER143A00. See Table 1 for kit contents. SeeTables 2-4 for unit electrical data and kit usage.NOTE: All units with electric heat require a field-supplied90-degree elbow. The elbow must be installed in the supplyductwork below the unit discharge connection.NOTE: Accessory heater package numbersCRHEATER142A00 and CRHEATER143A00 require anaccessory electric heat box. Contact your distributor for moredetails.Table 1 — Package ContentsQUANTITY ITEM1 Heater Module1 Heater Track2 7⁄ 8-in. Bushing2 2-in. Bushing7 No. 10 Screw6 Plate Washer6 Lock Nut3 3 ⁄8-in. Ring Terminal*2 Spacer*Ring terminals are included in package numbers CRHEATER137A00 andCRHEATER138A00 only and are only used on heat pump units.INSTALLATIONNOTE: A minimum ductwork clearance of 1 in. is re-quired for the first 24 in. of ductwork on 15 to 25 ton unitswith electric heat.1. Turn off power to the unit.2. Remove control box access panel and electric heater ac-cess panel. See Fig. 1.3. Remove cover plates from both ends of electric heatercompartment and save screws.4. Install heater track from accessory package into heatercompartment to facilitate installation of heater assem-bly. See Fig. 2. Locate track in compartment at side near-est indoor blower section. Secure track to basepans withfield-supplied screws.5. Install factory-supplied spacers at both sides of electricheater compartment. See Fig. 2 and 3.6. Remove 2 knockouts (one 7 ⁄8 in. and one 2 in.) from thepartition between electric heater compartment and con-trol box section. Insert bushings provided into the holes.See Fig. 2.7. Install electric heater assembly (Fig. 4) into heatercompartment.8. Feed electric heater control wires through 7 ⁄8 -in. bush-ing and feed power wires through 2-in. bushing in par-tition and into the electric heat control box section.9. Match the holes at the top of the heater assembly withthe baffle at the end of the unit opposite the control sec-tion. See Fig. 5.10. Reinstall cover plate over heater control section. To doso, line up cover plate, heater assembly, and baffle holes.Fasten heater assembly to unit with two no. 10 screwsprovided in accessory kit. Fasten bottom of cover plateto basepan with two no. 10 screws provided.11. Fasten electric heat control box to baffle using remain-ing no. 10 screws provided in accessory kit. See Fig. 5.Large Packaged Rooftop Units12 1 ⁄ 2 to 25 TonsAccessory Electric Heater PackagesManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 1 4 4Tab 1b 5a 5a 6bPC 111 Catalog No. 565-058 Printed in U.S.A. Form 50H,T-1SI Pg 1 1-99 Replaces: 50-5SI