Carrier 50SS018-060- Manual

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Page 2 – UNIT
Page 3 – Fig. 3 — Dimensions Units 50SS018-042 with Optional Base Rail
Page 5 – Fig. 5 — Dimensions Units 50SS048,060 With Optional Base Rail
Page 7 – Fig. 7 — Dimensions Units 50SX024-036 With Optional Base Rail
Page 10 – Fig. 9 — Dimensions Units 50SX042-060 With Optional Base Rail
Page 12 – Fig. 10 — Roof Curb Dimensions
Page 14 – Fig. 12 — Suggested Rigging for Units with Optional Base Rail
Page 16 – Step 5 — Select and Install Ductwork —; Table 3 — Minimum Airflow for Safe Electric; SIZE; Fig. 13 — Area Not To Be Drilled; Fig. 14 — Typical Installation
Page 20 – Step 6 — Provide for Condensate Disposal; Fig. 24 — Filler Bracket and Blower Shelf; Fig. 25 — Housing Placed for Vertical Airflow; Fig. 26 — Duct Flange Kit — Locating Holes
Page 21 – Step 7 — Install Electrical Connections; Fig. 27 — Condensate Trap
Page 22 – Table 4A — Electrical Data — 50SS Units
Page 23 – Table 4B — Electrical Data — 50SX Units
Page 24 – NEC — National Electrical Code; Fig. 30 — Line Power Connections
Page 25 – Fig. 32 — Easy Select Interface Board
Page 27 – Check for Refrigerant Leaks —
Page 28 – Table 5A — Superheat Charging Table, 50SS018; Table 5B — Superheat Charging Table, 50SS024
Page 29 – Table 5C — Superheat Charging Table, 50SS030; Table 5D — Superheat Charging Table, 50SS036; Table 5E — Superheat Charging Table, 50SS042
Page 31 – Table 6A — Superheat Charging Table, 50SX024; Table 6B — Superheat Charging Table, 50SX030
Page 32 – Table 6C — Superheat Charging Table, 50SX036; Table 6D — Superheat Charging Table, 50SX042; Table 6E — Superheat Charging Table, 50SX048
Page 33 – Table 6F — Superheat Charging Table, 50SX060
Page 39 – Table 13 — Wet Coil Pressure Drop
Page 41 – Fig. 35 — Fan Blade Clearance
Page 42 – TROUBLESHOOTING COOLING CHART; SYMPTOM
Page 46 – PACKAGED SERVICE TRAINING
Page 48 – I. PRELIMINARY INFORMATION; ELECTRICAL

Loading the manual

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . 1-12

General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

RECEIVING AND INSTALLATION

. . . . . . . . . . . 13-26

Step 1 — Check Equipment

. . . . . . . . . . . . . . . . . . 13

• IDENTIFY UNIT
• INSPECT SHIPMENT

Step 2 — Provide Unit Support

. . . . . . . . . . . . . . 13

• ROOF CURB
• SLAB MOUNT

Step 3 — Provide Clearances

. . . . . . . . . . . . . . . . 13

Step 4 — Rig and Place Unit

. . . . . . . . . . . . . . . . . 13

• UNITS WITHOUT BASE RAILS
• UNITS WITH OPTIONAL BASE RAILS

Step 5 — Select and Install Ductwork

. . . . . . . . 16

• CONVERTING HORIZONTAL DISCHARGE

UNITS TO DOWNFLOW (VERTICAL) DISCHARGE
— STD (NON-ICM) UNITS

• CONVERTING HORIZONTAL DISCHARGE UNITS

TO DOWNFLOW (VERTICAL) DISCHARGE
— ICM UNITS

• ACCESSORY DUCT FLANGE KIT INSTALLATION

Step 6 — Provide for Condensate Disposal

. . . 20

Step 7 — Install Electrical Connections

. . . . . . 21

• HIGH-VOLTAGE CONNECTIONS
• ROUTING POWER LEADS INTO UNIT
• CONNECTING GROUND LEAD TO

WIRE-BINDING SCREW

• ROUTING CONTROL POWER WIRES — STD

NON-ICM UNITS (24 V)

• ROUTING CONTROL POWER WIRES — ICM

UNITS (24 V)

• SPECIAL PROCEDURES FOR 208-V

OPERATION

PRE-START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26,27

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27-39

Check for Refrigerant Leaks

. . . . . . . . . . . . . . . . . 27

Start-Up Cooling Section and

Make Adjustments

. . . . . . . . . . . . . . . . . . . . . . . . 27

MAINTENANCE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,41

Air Filter

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Unit Top Removal

. . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Evaporator Blower and Motor

. . . . . . . . . . . . . . . . 40

Condenser Coil, Evaporator Coil,

and Condensate Drain Pan

. . . . . . . . . . . . . . . . 41

Condenser Fan

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Electrical Controls and Wiring

. . . . . . . . . . . . . . . 41

Refrigerant Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . 41

Evaporator Airflow

. . . . . . . . . . . . . . . . . . . . . . . . . . 41

Metering Devices

. . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Liquid Line Strainer

. . . . . . . . . . . . . . . . . . . . . . . . . 41

TROUBLESHOOTING COOLING CHART

. . . . . 42,43

START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . CL-1

NOTE TO INSTALLER — Before the installation, READ
THESE INSTRUCTIONS CAREFULLY A N D C O M-
PLETELY. Also, make sure the Owner’s Manual and Serv-
ice Instructions are left with the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment

can 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 should
be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to 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-
tinguisher available for all brazing operations.

Before performing service or maintenance operations on
system, turn off main power to unit. Turn off accessory
heater power switch if applicable. Electrical shock can
cause personal injury.

General —

50SS,SX cooling units are fully self-contained

and designed for outdoor installation. See Fig. 1. As shown
in Fig. 2-9, both small- and large-cabinet units are shipped
in a horizontal-discharge configuration for installation on
a ground-level slab. All units can be converted to down-
flow discharge configurations for rooftop applications. See
Fig. 10 for roof curb dimensions.

Instructions continued on page 13.

Fig. 1 — Unit 50SX With Optional Base Rail Shown

50SS018-060
50SX024-060

Single-Package Cooling Units

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

Book 1

Tab

1b 6b

PC 111

Catalog No. 535-022

Printed in U.S.A.

Form 50SS,SX-4SI

Pg 1

5-95

Replaces: 50SS,SX-3SI

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Page 2 - UNIT

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)Unit Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 (356)Duct Side of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 (51)Side Opposite Ducts . . . . . . . . . . . . . . . . . . . . . . . . 14 (356)Bottom of...

Page 3 - Fig. 3 — Dimensions Units 50SS018-042 with Optional Base Rail

Page 5 - Fig. 5 — Dimensions Units 50SS048,060 With Optional Base Rail

REQUIRED CLEARANCES TO COMBUSTIBLE MATERIAL — in. (mm)Unit Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 (356)Duct Side of Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 (51) Side Opposite Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . 14...

Carrier 50SS018-060- Manual

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