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 TM 55-1905-223-24-18-2
Table 3-2. Troubleshooting - CONT
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
POTABLE WATER PIPING SYSTEM - CONT
c. Leaking seal.
(1) Improper assembly. Repair pump (para. 3-109).
(2) Worn seal faces. Repair pump (para. 3-109).
64. No discharge pressure.
STEP 1. Check for defective pump.
Refer to Malfunction 1, Step 3.
65. Storage tank bulging.
STEP 1. Fill rate too high (exceeds 80 psi).
Replace pressure switch, (para. 2-322).
STEP 2. Inspect tank vent valve.
a. Ensure that flame screens, ball checks, and lines are free of rust and debris.
b. Replace or repair vent valve (para. 3-209).
66. Hot water heater.
STEP 1. No hot water.
a. Check thermostatic switches with ohmmeter for open or grounded circuit.
NOTE
Switch circuits are normally closed, and opened on temperature rise.
b. Replace or repair thermostatic switches (para. 3-213).
STEP 2. Water temperature below thermostat set point.
Check thermostatic switch. Replace switch (para. 3-219).
STEP 3. Water temperature exceeds 210 .
F
Check thermostatic switch. Replace switch (para. 3-219).
STEP 4. Water pressure exceeds 110 psi.
Replace relief valve (para 3-209).
3-42
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