Carrier 50ZH024-060 - Manual

Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
RECEIVING AND INSTALLATION . . . . . . . . . . . . 5-11
Step 1 — Check Equipment . . . . . . . . . . . . . . . . . . . 5
• IDENTIFY UNIT
• INSPECT SHIPMENT
Step 2 — Provide Unit Support . . . . . . . . . . . . . . . 5
• SLAB MOUNT
Step 3 — Provide Clearances . . . . . . . . . . . . . . . . . 5
Step 4 — Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Step 5 — Select and Install Ductwork . . . . . . . . . 5
Step 6 — Provide for Condensate Disposal . . . . 7
Step 7 — Install Electrical Connections . . . . . . . 7
• HIGH-VOLTAGE CONNECTIONS
• ROUTING POWER LEADS INTO UNIT
• CONNECTING GROUND LEAD TO UNIT GROUND
• ROUTING CONTROL POWER WIRES
• ACCESSORY ELECTRIC HEAT WIRING
• SPECIAL PROCEDURES FOR 208-V
OPERATION
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-15
Check for Refrigerant Leaks . . . . . . . . . . . . . . . . . 12
Start-Up Cooling Section and
Make Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 12
Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . . . 12
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-17
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Unit Top Removal (Outdoor Coil Side) . . . . . . . . 16
Indoor Blower and Motor . . . . . . . . . . . . . . . . . . . . 16
Outdoor Coil, Indoor Coil,
and Condensate Drain Pan . . . . . . . . . . . . . . . . 16
Outdoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Electrical Controls and Wiring . . . . . . . . . . . . . . . 16
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Indoor Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Liquid Line Strainers . . . . . . . . . . . . . . . . . . . . . . . . 17
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 18,19
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
NOTE TO INSTALLER
Before the installation, READ THESE INSTRUCTIONS
CAREFULLY AND COMPLETELY. Also, make sure the
Owner’s Manual and Service 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 workers should install,
repair, or service air-conditioning equipment.
Untrained workers can perform basic maintenance func-
tions of cleaning coils and filters. All other operations should
be performed by trained service people. When working on
air-conditioning equipment, pay attention to 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
50ZH cooling units are fully self-contained and designed
for outdoor installation. See Fig. 1. As shown in Fig. 2-4,
units are shipped in a horizontal-discharge configuration for
installation on a ground-level slab.
Fig. 1 — Unit 50ZH (Size 030 Shown)
50ZH024-060
Single-Package Heat Pump Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a
PC 111 Catalog No. 535-007 Printed in U.S.A. Form 50ZH-2SI Pg 1 9-96 Replaces: 50ZH-1SI