Set Appliance State:

Mains Power Off
DHW Demand
DHW Selector in Maximum (+) position
CH Selector in Minimum (-) position
ON/OFF Switch in ON position
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

The condensate trap and drain is located on the right hand side and can be accessed from underneath the appliance.
Allow ignition sequence to run and appliance to fire.
Observe the siphon as the appliance operates does the siphon trap fill and when full does the condensate automatically clear?