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Section 8: Fault Finding
8 FAULT FINDING
8.1
INTERMITTENT WATER DISCHARGE
Yes
Intermittent water discharge
from T&P valve
Expansion vessel charge
reduced
Test vessel and recharge or
replace
Thermostat failure
Immersion thermostat failure
Repair or replace immersion
thermostat
Primary cylinder thermostat
Faulty T&P valve
Repair or replace thermostat
Replace T&P valve
Test for correct operation. If water is still discharging, contact a
compentant engineer.
No
No
No
Yes
Yes
Yes
8.2
CONSTANT WATER DISCHARGE
Constant water discharge from
T&P valve
Expansion vessel charge
reduced
Faulty T&P valve
Faulty pressure reducing valve
Test vessel and recharge or
replace
Replace T&P valve
Replace pressure reducing
valve
No
No
No
Yes
Yes
Yes
Yes
Yes
Test for correct operation. If water is still discharging, contact a
competent engineer
Summary of Contents for HPMONO/IND125
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