Grant QR Range - Fault Finding and Troubleshooting; Water Discharge Faults

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8.1 INTERMITTENT WATER DISCHARGE
8 FAULT FINDING
Section 8: Fault Finding
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
YesYes Yes
Yes
Yes
Test for correct operation. If water is still discharging, contact a
competent engineer