Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
5 Installation
83309302 1/2018-05 La
44-196
5.5 Condensate connection
DANGER
Danger of poisoning by escaping flue gas
Flue gas can escape if the siphon is not filled. Inhalation leads to dizziness, nausea
and eventually death.
Check the fill level of the siphon at regular intervals and replenish if necessary, in
particular when the system has been shut down for longer periods or has been
operated at high return temperatures > 55 °C.
The condensate generated during the heating mode is discharged to the sewage
system via an integrated siphon.
Observe work sheet DWA-A 251 and local regulations, if required, fit a neutralisa-
tion system.
If the discharge point of the sewage system is above the condensate outlet:
Installing condensate lift pump.
Install condensate hose
Place condensate hose in such a way that it is not possible for a water bag to form
(siphon effect) and the condensate can drain away unimpeded.
Run condensate hose to condensate outlet pipe.
Filling the siphon
Fill the siphon with water via the flue gas outlet or inspection opening, until water
flows from the condensate hose.
CAUTION
Damage to boiler due to the accumulation of condensate
An accumulation of condensate can cause faults or damage the appliance.
If there is another siphon downstream of the appliance:
Install a connection piece with breather opening between the two siphons.