Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
CH Demand
Attach one temperature clamp to the nut on the pipe leading to the plate heat exchanger and one on the flow pipe to the radiators inside the boiler as shown by the red arrows
Boiler CH thermostat set to MAX
Boiler CH thermostat set to MAX
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Observation:
Allow the burner to ignite and the boiler to run in central heating mode.
Monitor the temperature of the two pipes.
Does the nut on the pipe to the plate heat exchanger increase in temperature more than the flow pipe to the radiators as the appliance runs in central heating mode?
Note:
1. If the appliance is already hot (over 60°C) it will be necessary to cool it to less than 40°C before carrying out this test, this can be done by running the appliance in DHW mode with 1 wire removed from the modureg or the gas turned off.
2. Ensure a good contact is made to the pipe with the temperature clamp.
Monitor the temperature of the two pipes.
Does the nut on the pipe to the plate heat exchanger increase in temperature more than the flow pipe to the radiators as the appliance runs in central heating mode?
Note:
1. If the appliance is already hot (over 60°C) it will be necessary to cool it to less than 40°C before carrying out this test, this can be done by running the appliance in DHW mode with 1 wire removed from the modureg or the gas turned off.
2. Ensure a good contact is made to the pipe with the temperature clamp.
Isolate as per TOPs P4
and refit as necessary