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GENERAL DISASSEMBLY
This section includes common procedures for disassem-
bly and reassembly of 52S units. These instructions
are general in nature and include procedures the tech-
nician may be called upon to perform when accessing
certain components of the 52S unit.
It is important to carefully follow manufacturer’s instruc-
tions when disassembling or reassembling a unit for
cleaning, maintenance, or part replacement. When dis-
assembling wiring, it is strongly recommended that
numbered stickers be attached to identify leads and ter-
minals to aid in the reassembly process. Always review
safety procedures prior to the start of a job.
Prior to servicing electrical equipment, disconnect all
power to avoid electric shock! Never alter cord or plug
and do not use extension cords.
TO DISCONNECT POWER FOR CORD-
CONNECTED UNIT
1. Push OFF button.
2. Open the disconnect switch at main power supply.
Use proper Lockout and Tag procedures.
3. Unplug the unit service cord.
TO DISCONNECT POWER FOR
PERMANENTLY CONNECTED
(HARDWIRED) UNITS
1. Push OFF button.
2. Open the disconnect switch at main power supply.
Use proper Lockout and Tag procedures.
3. Remove screw from access cover and remove ac-
cess cover.
4.
Pull out the plug assembly and disconnect (see
Figure 4).
TO OPEN THE CONTROL BOX
The control box is factory wired. To open the control
box, remove the 2 screws on the front of the control box
and lower the front hinged panel. See Figure 5.
TO REMOVE THE UNIT FROM THE
WALL SLEEVE
1. Remove the four, 1
3
⁄
4
-in. mounting screws that se-
cure the unit to the wall sleeve. There are 2 screws
on each side (Figure 6).
2. Grasp the sides of the unit and slide it from the sleeve.
The chassis weighs between 110 and 150 pounds.
Take proper safety precautions to avoid personal in-
jury when lifting and moving the chassis.
The unit basepan may have water in it. Tilt the unit
back slightly when removing it from the sleeve to
drain some of the water into the sleeve.
.
.
CONTROL
BOX
ACCESS
COVER
PLUG
ASSEMBLY
FIGURE 4 — DISCONNECTING PLUG
ASSEMBLY ON HARDWIRED UNITS
FIGURE 5 — OPEN CONTROL BOX
FIGURE 6 — UNIT TO WALL SLEEVE
MOUNTING SCREWS
52S
SERIES
4