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5. System start-up
Commissioning of a newly installed system may only be carried out by a qua-
lified installer. A full installation check must be completed prior to start-up.
- Press On/Off
to switch the appliance off (LED dark), water pressure is
displayed!
- Open the shut-off valve of the heater flow and return.
- Open the shut-off valve of the gas line that leads to the boiler
- Turn on the main switch outside the boiler room (if available).
Frequently the heating system has an additional safety switch that only
disable the gas burner.
- Before commissioning the TopGas
®
the stench trap (siphon) in the conden-
sate drain pipe must be filled with water.
5.1 Checks prior to start-up
Check the water level in the heating system.
The heating system must be filled with water and all the air removed.
Observe the regulations regarding antifreeze and water treatment.
Open the shut-off valves in the flow and return lines.
Check the fresh air supply to the heating system.
Check the settings for the operating modes.
5. Switching on the system
Open the gas valve.
Turn on the main switch.
Set the boiler control unit to the desired operating mode and temperature.
i
i
4.
Functional principle of the heating system /
5. System start-up
Radiator(s) or
underfloor hea-
ting where fitted
Heating boiler
Water heater
Chimney, flue
system
