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Carrier 50SS018-060, 50SX024-060 START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION, II. PRE-START-UP (insert checkmark in box as each item is completed), III. START-UP

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START-UP CHECKLIST

(Remove and Store in Job File)

I. PRELIMINARY INFORMATION

MODEL NO.:

DATE:

SERIAL NO.:

TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)

MVERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

MREMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

MVERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS

MCHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

MCHECK THAT INDOOR AIR FILTER IS CLEAN AND IN PLACE

MVERIFY THAT UNIT INSTALLATION IS LEVEL

MCHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW

TIGHTNESS

III. START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2 L2-L3 L3-L1

COMPRESSOR AMPS L1 L2 L3

INDOOR FAN AMPS

TEMPERATURES

OUTDOOR-AIR TEMPERATURE DB

RETURN-AIR TEMPERATURE DB WB

COOLING SUPPLY AIR

PRESSURES

REFRIGERANT SUCTION PSIG

REFRIGERANT DISCHARGE PSIG

MVERIFY THAT 3-PHASE SCROLL COMPRESSOR (50SS048,060; 50SX036-060 UNITS ONLY) IS ROTATING

IN CORRECT DIRECTION

MVERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 28-33.

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CUT ALONG DOTTED LINE

Copyright 1995 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, speciﬁcations or designs without notice and without incurring obligations.

Book 1 4

Tab 1b 6b PC 111 Catalog No. 535-022 Printed in U.S.A. Form 50SS,SX-4SI Pg CL-1 5-95 Replaces: 50SS,SX-3SI

Contents

Main Installation, Start-Up and Service Instructions CONTENTS SAFETY CONSIDERATIONS General 50SS018-060 50SX024-060 Single-Package Cooling Units Fig. 2 Dimensions; Units 50SS018-042 Without Base Rail Fig. 3 Dimensions; Units 50SS018-042 with Optional Base Rail Fig. 4 Dimensions; Units 50SS048,060 Without Base Rail Fig. 5 Dimensions; Units 50SS048,060 With Optional Base Rail Fig. 6 Dimensions; Units 50SX024-036 Without Base Rail Fig. 7 Dimensions; Units 50SX024-036 With Optional Base Rail Page Fig. 8 Dimensions; Units 50SX042-060 Without Base Rail (cont) Page Fig. 9 Dimensions; Units 50SX042-060 With Optional Base Rail (cont) Fig. 10 Roof Curb Dimensions RECEIVING AND INSTALLATION Step 1 Check Equipment Step 2 Provide Unit Support Step 3 Provide Clearances Step 4 Rig and Place Unit Fig. 12 Suggested Rigging for Units with Optional Base Rail Fig. 11 Suggested Rigging for Units Without Base Rail Table 1 Physical Data Unit 50SS Table 2 Physical Data Unit 50SX Step 5 Select and Install Ductwork Page Page Page Step 6 Provide for Condensate Disposal Step 7 Install Electrical Connections Table 4A Electrical Data 50SS Units Never operate a motor where a phase imbalance in supply volt- age is greater than 2%. Table 4B Electrical Data 50SX Units Never operate a motor where a phase imbalance in supply volt- age is greater than 2%. Page Fig. 33 Units 50SX048,060 208/230-1-60, Integrated Control Motor Wiring Schematic Fig. 32 Easy Select Interface Board PRE-START-UP START-UP Check for Refrigerant Leaks Start-Up Cooling Section and Make Adjustments Page Table 5C Superheat Charging Table, 50SS030 Table 5D Superheat Charging Table, 50SS036 Table 5E Superheat Charging Table, 50SS042 Table 5F Superheat Charging Table, 50SS048 (Carrier Scroll Compressor) Table 5G Superheat Charging Table, 50SS048 (Copeland Scroll Compressor) Table 5H Superheat Charging Table, 50SS060 (Carrier Scroll Compressor) Table 5I Superheat Charging Table, 50SS060 (Copeland Scroll Compressor) Table 6A Superheat Charging Table, 50SX024 Table 6B Superheat Charging Table, 50SX030 Table 6C Superheat Charging Table, 50SX036 Table 6D Superheat Charging Table, 50SX042 Table 6E Superheat Charging Table, 50SX048 Table 6F Superheat Charging Table, 50SX060 Table 7 Required Suction-Tube Temperature (F)* Page Page Table 8 Dry Coil Air Delivery* Horizontal Discharge (Deduct 10% for 208 v) Unit 50SS Table 9 Dry Coil Air Delivery* Vertical Discharge (Deduct 10% for 208 v) Unit 50SS Table 10 Dry-Coil Air Delivery* Horizontal Discharge (Deduct 10% for 208 V) Unit 50SX Table 11 Dry-Coil Air Delivery* Vertical Discharge (Deduct 10% for 208 V) Unit 50SX Table 13 Wet Coil Pressure Drop Table 14 Accessory Electric Heater Pressure Drop (in. wg) Table 15 Filter Pressure Drop (in. wg) MAINTENANCE Air Filter Unit Top Removal Evaporator Blower and Motor Condenser Coil, Evaporator Coil, and Conden- sate Drain Pan Condenser Fan Electrical Controls and Wiring Refrigerant Circuit Evaporator Airow TROUBLESHOOTING COOLING CHART TROUBLESHOOTING COOLING CHART (cont) Page Page PACKAGED SERVICE TRAINING Page START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION II. PRE-START-UP (insert checkmark in box as each item is completed) III. START-UP