Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
12 Technical documentation
83309302 1/2018-05 La
155-196
WTC input H2
The function (contact position) of input H2 can be rotated using parameter
Input
H2 inverted
.
Setting
Explanation
Off
Input not used
System standby with
frost protection
The WTC is disabled for heating and DHW mode when the contact is closed.
Frost protection is activated.
Emergency-Off
heat exchanger
The system is disabled for heating and DHW mode when the contact is open.
Frost protection is not activated.
Block heating/
DHW mode
The WTC is disabled for heating and DHW mode when the contact is closed.
Frost protection is activated.
Generator block
DHW mode
The WTC is disabled for DHW mode when the contact is closed. Frost protection
is not activated.
DHW 1: standby
DHW mode is disabled when the contact is closed. Frost protection is activated.
DHW 1: setback
When the contact is closed, the system heats to setback setpoint. The DHW pro-
gram is ineffective.
DHW 1: normal
When the contact is closed, the system heats to normal setpoint. The DHW pro-
gram is ineffective.
DHW 1:
Boost/button
If the button on the input is pressed, the WTC loads the DHW storage tank in
DHW circuit 1 once to the normal DHW setpoint temperature. An increased de-
mand for hot water during setback operation can be met using the DHW boost
function.
Forward signalling via
portal
When the contact is closed, a message is forwarded to the WEM portal.
DHW 1:
circulation/button
Only if the hydraulic
circulation pump
is set to
time cont
button (H2)
in the commissioning wizard.
If the button on the input is pressed, the WTC activates the output for the circula-
tion pump. The output to which the pump is connected must be set to hot water
circuit 1: circulation. The run time of the pump is determined via parameter
pump
run time via button
.
Heating circuit (extension module WEM-EM-HK) input H1
Setting
Explanation
no function
Input not used
Standby
heating mode is disabled when the contact is closed. Frost protection is activated.
Heating circuit activ-
ated
setback operation
When the contact is closed, the system heats to setback setpoint. The relevant
heating program is ineffective.
Heating circuit activ-
ated
normal operation
When the contact is closed, the system heats to normal setpoint. The relevant
heating program is ineffective.
Heating circuit activ-
ated
comfort operation
When the contact is closed, the system heats to comfort setpoint. The relevant
heating program is ineffective.
Heating circuit activ-
ated
special level
When the contact is closed, the system heats to special level. The relevant heating
program is ineffective.
Emergency-Off
heating mode is disabled when the contact is open. Frost protection is not activ-
ated.