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
81-196
Parameters
Setting
6.2.8
Level increase
external temperature
If the outdoor temperature drops below the value set, heating continues in setback
mode at normal level, to prevent the building from cooling down.
On
:
Level increase activated.
Off
:
Level increase not activated.
6.2.9
Correction
external temperature
Correction of the current outdoor temperature by external sensor (T1) on heating
circuit extension module.
If no optimal placement of the outdoor sensor is possible or a measurement error
is to be compensated, the measured outdoor temperature can be corrected.
Only if sensor T1 is configured to
external sensor
.
6.2.10
Frost protection
Room temperature
If the current room temperature drops below the value set, frost protection function
is activated.
(1
Factory setting depending on the heating circuit type set [ch. 12.7].
6.6.5.3 Mixer control
Heating
circuits
Mixer
control
Parameters
Setting
6.3.1
Mixer elevation
The flow setpoint temperature of the mixer heating circuit is increased by the value
set, e. g. to compensate for load losses.
6.3.2
Delay time
heat demand
At heat demand via the mixer heating circuit the start of the condensing unit is
delayed by the time set. During the delay time, the mixer opens and the condens-
ing unit has flow.
6.3.3
Mixer run time
Run time of mixer, from CLOSED position to fully OPEN position.
6.3.4
Mixer
initialisation run time
When driving from the CLOSED position to the OPEN position, the time set is ad-
ded to the
mixer run time
(P
6.3.3
), to achieve the end position of the
mixer.
6.3.5
Tolerance range
mixer control
(1
The parameter determines from which the differential between the current flow
temperature and the flow setpoint temperature the mixers is controlled.
A high differential reduces the driving impulses and protects the actuator.
A low differential increases the control accuracy (e. g. for underfloor heating).
6.3.6
Temperature controller
P part Kp
Proportional part of heating circuit controller.
The greater the value set, the faster the control will commence. If the value set is
too great the controller tends to over-oscillate.
6.3.7
Temperature controller
I part Tn
Integral part of heating circuit controller.
The smaller the value set, the faster the control will commence. If the value is set
too small, the controller tends to oscillate.
(1
Factory setting depending on the heating circuit type set [ch. 12.7].
