Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Turn Hot Water Tap On
Attach temperature clamp to return pipe above pump as shown
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Press menu button (3 dashes) and select
boiler status to view flow temperature.
Allow boiler to operate on DHW for at least 2 minutes.
Measure the differential between the flow temperature on the display and the return temperature on the Telega.
Differential should be approximately 30 degrees or less.
Note:
Do NOT attach a second probe to flow pipe to check differential.
This is due to an issue with the new FGA Click here for information.