TM 10-3510-220-24
3-22. WATER HEATER OPERATING LIMIT AND HIGH-LIMIT CONTROLS
This task covers:
a. Replace
b. Adjustment
INITIAL SETUP
Tools
General mechanic’s tool kit
Materials/Parts
Operating/high limit relay 6-1-8121
(81137)
Thread sealer compound
(Item 5, App C)
Equipment Condition
TM 10-3510-220-10, Tarp assembly removed.
General Safety Instructions
WARNING
High voltage is present on this equipment. Do
not perform maintenance with power on.
Death or serious injury may result.
WARNING
Ensure water heater is cold before servicing
the high-limit temperature control. The water
vessel becomes hot during operation and
burns or bodily injury may result from contact
with the water heater before it cools. Allow
water heater to cool before servicing the high-
limit temperature control.
REPLACE
1.
Remove cap (1), retainer (2), and cover plate (3) from high-limit control (4).
2.
Tag and disconnect two wires (5).
3.
Loosen conduit nut (6) on each end of conduit (7) and slide nuts toward center of conduit.
4.
Open inspection plate (8) and pull wires until wires do not extend beyond end of conduit (7).
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