Unit Disassembly; Tools Needed; Remove Front Panel; Disconnect Power For Cord-Connected Unit - Carrier 52C Series Service Technician Manual

Series Designation
PTAC (Packaged Terminal Air Conditioner)
CE – Cooling with Electric Heat
CQ – Heat Pump with Electric Heat
PC – Cooling Only
PE – Cooling with Electric Heat
PQ – Heat Pump with Electric Heat
Latest Revision
A – Z
Electric Heater Size
0 – No Heating (Cooling Only Model)
2 – 2.3 kW
3 – 3.4 kW
5 – 5.0 kW
Cooling Capacity (nominal)
07 – 7,000 Btuh
09 – 9,000 Btuh
12 – 12,000 Btuh
15 – 15,000 Btuh
This section includes common procedures for disas-
sembly and re-assembly of unit.
IMPORTANT: Follow manufacturer's instruc-
tions when disassembling and re-assembling a
unit for cleaning, maintenance, or part replace-
ment. When disassembling wiring, it is strongly
recommended that numbered stickers be
attached to identify leads and terminals to aid in
the re-assembly process. Always review safety
procedures prior to the start of a job.
Prior to servicing electrical equipment, discon-
nect all power to avoid electric shock! Tag all dis-
connects. Never alter cord or plug and do not use
extension cords.

TOOLS NEEDED

The following field-supplied items are recommended
for general disassembly of the unit:
• Flat head screw driver
5
• / -in. nut driver
16
• Safety glasses
• Needle nose pliers

REMOVE FRONT PANEL

NOTE: Before removing front panel, remove 2 locking
screws (if installed) located behind the filter handles.
52 PQ A 3
FIGURE 2 — MODEL NUMBER NOMENCLATURE

UNIT DISASSEMBLY

12 3 0 1 AA
Chassis Options
Blank or AA – Standard
Packaging
1 – Domestic
Non-Performance
Changes 0-9
Electrical Data
3 – 230/208-v, 60 Hz
4 – 265-v, 60 Hz
See Figure 3. If a lateral duct accessory is installed, the
plenum must be removed before removing the front
panel. Refer to Remove Lateral Duct Extension section
for removal instructions.
1. Grasp the front panel firmly at the center of the
top and bottom of the panel.
2. Pull the panel upward at the bottom and forward
at the top to release magnetic latches and partition
hooks. See Figure 4.
DISCONNECT POWER FOR
CORD-CONNECTED UNIT
1. Turn selector switch to OFF position.
2. Open the disconnect switch at main power supply.
Use proper Lockout and Tag procedures.
3. Unplug the unit service cord.
DISCONNECT POWER FOR
PERMANENTLY CONNECTED
(HARDWIRED) UNITS
1. Turn selector switch to OFF position.
2. Open the disconnect switch at main power supply.
Use proper Lockout and Tag procedures.
3. Remove screw from access cover and remove
access cover.
4. Pull out the plug assembly and disconnect. See
Figure 5.
3
CP – Corrosion Protection
RC – Wall Thermostat Control
RP – Wall Thermostat Control with
Corrosion Protection