Carrier 50SS018-060 Installation, Start-up And Service Instructions Manual

Contents

Installation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . 1-12General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1RECEIVING AND INSTALLATION . . . . . . . . . . . 13-26Step 1 — Check Equipment . . . . . . . . . . . . . . . . . . 13• IDENTIFY UNIT• INSPECT SHIPMENTStep 2 — Provide Unit Support . . . . . . . . . . . . . . 13• ROOF CURB• SLAB MOUNTStep 3 — Provide Clearances . . . . . . . . . . . . . . . . 13Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . 13• UNITS WITHOUT BASE RAILS• UNITS WITH OPTIONAL BASE RAILSStep 5 — Select and Install Ductwork . . . . . . . . 16• CONVERTING HORIZONTAL DISCHARGEUNITS TO DOWNFLOW (VERTICAL) DISCHARGE— STD (NON-ICM) UNITS• CONVERTING HORIZONTAL DISCHARGE UNITSTO DOWNFLOW (VERTICAL) DISCHARGE— ICM UNITS• ACCESSORY DUCT FLANGE KIT INSTALLATIONStep 6 — Provide for Condensate Disposal . . . 20Step 7 — Install Electrical Connections . . . . . . 21• HIGH-VOLTAGE CONNECTIONS• ROUTING POWER LEADS INTO UNIT• CONNECTING GROUND LEAD TOWIRE-BINDING SCREW• ROUTING CONTROL POWER WIRES — STDNON-ICM UNITS (24 V)• ROUTING CONTROL POWER WIRES — ICMUNITS (24 V)• SPECIAL PROCEDURES FOR 208-VOPERATIONPRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26,27START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-39Check for Refrigerant Leaks . . . . . . . . . . . . . . . . . 27Start-Up Cooling Section andMake Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 27MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,41Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Unit Top Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Evaporator Blower and Motor . . . . . . . . . . . . . . . . 40Condenser Coil, Evaporator Coil,and Condensate Drain Pan . . . . . . . . . . . . . . . . 41Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Electrical Controls and Wiring . . . . . . . . . . . . . . . 41Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 41Evaporator Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . 41Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Liquid Line Strainer . . . . . . . . . . . . . . . . . . . . . . . . . 41TROUBLESHOOTING COOLING CHART . . . . . 42,43START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1NOTE TO INSTALLER — Before the installation, READTHESE INSTRUCTIONS CAREFULLY AND COM-PLETELY. Also, make sure the Owner’s Manual and Serv-ice Instructions are left with the unit after installation.SAFETY CONSIDERATIONSInstallation and servicing of air-conditioning equipmentcan be hazardous due to system pressure and electrical com-ponents. Only trained and qualified personnel should install,repair, or service air-conditioning equipment.Untrained personnel can perform basic maintenance func-tions of cleaning coils and filters. All other operations shouldbe performed by trained service personnel. When workingon air-conditioning equipment, observe precautions in theliterature, tags and labels attached to the unit, and other safetyprecautions that may apply.Follow all safety codes. Wear safety glasses and work gloves.Use quenching cloth for unbrazing operations. Have fire ex-tinguisher available for all brazing operations.Before performing service or maintenance operations onsystem, turn off main power to unit. Turn off accessoryheater power switch if applicable. Electrical shock cancause personal injury.General — 50SS,SX cooling units are fully self-containedand designed for outdoor installation. See Fig. 1. As shownin Fig. 2-9, both small- and large-cabinet units are shippedin a horizontal-discharge configuration for installation ona ground-level slab. All units can be converted to down-flow discharge configurations for rooftop applications. SeeFig. 10 for roof curb dimensions.Instructions continued on page 13.Fig. 1 — Unit 50SX With Optional Base Rail Shown50SS018-06050SX024-060Single-Package Cooling UnitsManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Book 1 4Tab 1b 6bPC 111 Catalog No. 535-022 Printed in U.S.A. Form 50SS,SX-4SI Pg 1 5-95 Replaces: 50SS,SX-3SI