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
75-196
6.6.2.2 Boiler circuit
WTC-G ...
Boiler circuit
Parameters
Setting
2.2.1
Internal pump
operating mode HC
Operating mode of internal condensing unit pump for heating mode [ch. 12.4].
Load proportional
De-couple control
Proportional pressure stage 1 … 3
Constant pressure stage 1 … 3
Proport. pressure auto adaption
Constant pressure auto adaption
Factory setting depending on the selected hydraulic variant.
2.2.2
Internal pump
operating mode DHW
Operating mode of internal condensing unit pump for DHW mode [ch. 12.4].
Load proportional
Constant pump capacity
Factory setting depending on the selected hydraulic variant.
2.2.3
Pump capacity
minimum heating mode
Minimum pump capacity in heating mode.
2.2.4
Pump capacity
maximum heating mode
Maximum pump capacity in heating mode.
2.2.5
Pump capacity
minimal DHW mode
Minimum pump capacity for DHW loading.
2.2.6
Pump capacity
maximum DHW mode
Maximum pump capacity for DHW loading.
2.2.7
Minimum system pressure
warning
If the system pressure in the condensing unit drops below the value set, a warning
message is issued.
2.2.8
Minimum system pressure
burner lockout
If the system pressure in the condensing unit drops below the value set, an error
message is issued. The condensing unit is blocked. When the pressure rises
again, the appliance restarts automatically.
2.2.12
Inertia internal pump
Determines how fast the pump reacts to a change in the temperature differential
between flow/decouple.
The parameter is only effective, if parameter
2.2.1 Internal pump oper-
ating mode HC
is set to
de-couple control
.
2.2.13
Pump capacity
boiler pump
Pump capacity of load pump stratified tank during DHW loading.
Only on compact version WAS … Power.
2.2.14
Inertia
DHW load pump
Depending on requirements, the pump capacity of the stratified storage tank load
pump is adjusted. The pump capacity changes by 1% each time the time set has
elapsed.