Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
6 Operation
83309302 1/2018-05 La
86-196
6.6.6.3 Circulation
Domestic hot
water
Circulation
Parameters
Setting
7.3.1
Switch differential
Return flow temp
Switch differential for the circulation pump control.
Only if
circulation pump
is set to
time cont temperat-
ure
.
Circulation On:
If the temperature at the circulation sensor drops below the DHW temperat-
ure (sensor B3) minus the value set minus 5 K, the pump starts.
Circulation Off:
If the temperature at the circulation sensor exceeds the DHW temperat-
ure (sensor B3) minus the value set, the pump switches off.
7.3.2
Pump run time via
button
Run time of circulation pump by pressing button on input H2.
Only if the hydraulic
circulation pump
is set to
time cont
button (H2)
in the commissioning wizard.
7.3.3
Circulation for DHW
Boost
Configure circulation pump for DHW boost.
Off
:
Circulation pump not activated during DHW boost.
On during DHW boost
:
Circulation pump activated during DHW boost.
On after DHW boost
:
Circulation pump activated for 4 minutes only after DHW boost.
Disadvantage: if the pipework is long this setting leads to high heat loss.
6.6.7 Service WTC
6.6.7.1 Servicing
Service WTC
Servicing
Parameters
Setting
Time to service
Show the remaining time until service.
Service
Reset service.
Interval
Change service interval.