Set Appliance State:
Turn Hot Water Tap On
Isolate Mains Power to appliance as per TOPs P4
Purge Switch in NORMAL position
HW Switch in ON position
CH Switch in OFF position
HW Potentiometer set to maximum
Attach a U Gauge to the gas valve output pressure test point
Purge Switch in NORMAL position
HW Switch in ON position
CH Switch in OFF position
HW Potentiometer set to maximum
Attach a U Gauge to the gas valve output pressure test point
| WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure |
Observation:
Allow the Burner to operate with a high gas output pressure of approximately 10 mb and heat the Secondary Heat Exchanger.
When the Secondary Heat Exchanger has been heated sufficiently can the burner gas pressure be controlled with the HW Potentiometer?
Notes:
The flow of the Domestic Hot Water may need to be reduced at the tap to assist temperature rise.
When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
When the Secondary Heat Exchanger has been heated sufficiently can the burner gas pressure be controlled with the HW Potentiometer?
Notes:
The flow of the Domestic Hot Water may need to be reduced at the tap to assist temperature rise.
When U-gauge is removed pressure test point should be tightened & checked for gas soundness.
Isolate as per TOPs P4
and refit as necessary