TM 5-6350-275-24&P
3-82.
REPLACE HEATER AND THERMOSTAT. (See Figure 3-43 and 3-6).
This task consists of:
a. Remove
b. Install
INITIAL SETUP
Equipment Condition:
General Safety Instructions:
Input power removed
Remove all jewelry while working on
Enclosure access cover removed
equipment.
Wear ESD wriststrap while working on
Tools:
equipment.
Screwdriver, flat tip, (Item 6, App B)
Materials/Parts:
(110VAC PN# 3569-H99)
Heater assembly
(220VAC PN# 5723-H99)
Thermostat
WARNING
Shut off power source before attempting to disconnect, service, or connect wires or cables.
Failure to do so may result in serious injury or death.
a. Removal
(1) Using a flat tip screwdriver, remove the white wire and gray wire, connected to thermostat (31) and heater
(23), from input power terminal block (7) output side pins 1 and 2 (Figure 3-6).
(2) Using a flat tip screwdriver, remove the two screws (30) holding thermostat (31) to panel (6).
(3) Using a flat tip screwdriver, remove the four screws (20) holding heater element cover (21) to panel (6).
(4) Using a flat tip screwdriver, remove the two screws (22) holding the heater element (23) to panel (6) and
remove heater element.
b. Installation
CAUTION
Be sure replacement heater is rated at same voltage as the removed one.
(1)
Secure heater element (23) to panel (6) using two screws (22).
(2)
Secure heater element cover (21) to panel (6) using four screws (20).
(3)
Secure thermostat (31) to panel (6) using two screws (30).
(4)
Using a flat tip screwdriver, connect the white wire and gray wire, from thermostat (31) and heater (23), to
input power terminal block (7) output side, pins 1 and 2 (Figure 3-6).
(5) Reconnect input power.
(6) Replace enclosure cover and secure.
3-167
