Set Appliance State:
Mains Power Off
CH Demand
Ensure all heating controls are calling for heat
DHW temp selector to minimum
DHW temp selector to minimum
Gas On
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Boiler On/Off switch On.
Reset lockout if necessary.
Allow boiler to fire under CH demand.
The boiler will ignite at high rate then after approximately 10 to 20 seconds the gas rate will reduce, the appliance will then monitor the temperature rise. If insufficient temperature rise is sensed then the gas rate will be gradually increased (if temperature rise is insufficient after 15 minutes then the appliance should go to full rate).
Note:
Burner will only modulate if the system temperature rise is insufficient, if radiators heat sufficiently then modulation will not take place.
Reset lockout if necessary.
Allow boiler to fire under CH demand.
The boiler will ignite at high rate then after approximately 10 to 20 seconds the gas rate will reduce, the appliance will then monitor the temperature rise. If insufficient temperature rise is sensed then the gas rate will be gradually increased (if temperature rise is insufficient after 15 minutes then the appliance should go to full rate).
Note:
Burner will only modulate if the system temperature rise is insufficient, if radiators heat sufficiently then modulation will not take place.
