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
148-196
12.1.2 WTC version KP
Hydraulic version
Components / settings
Explanation
KP1
WTC version K
Components:
WAS … Power
Settings:
Direct DHW circuit: yes
Direct heating circuit: yes
Factory setting:
P
2.2.1
: Constant pressure 2
The condensing unit loads the DHW stor-
age tank or supplies heating circuit 1 via the
internal three-way valve.
The condensing unit controls DHW loading
and heating circuit 1.
WTC connection:
MFA1: circulation pump WW1 (if avail-
able)
B1: external sensor
B3: DHW sensor switch-on
T1: DHW outlet sensor
T2: DHW sensor switch-off
230V
↓
: voltage supply stratified tank
load pump
: PWM signal stratified tank load pump
KP2 (A)
WTC version K
Components:
WAS … Power
De-couple
External heating circuit pump
Settings:
Direct DHW circuit: yes
Direct heating circuit: yes
Factory setting:
P
2.2.1
: De-couple control
The condensing unit loads the DHW stor-
age tank or supplies the de-couple via the
internal three-way valve.
The external heating circuit pump down-
stream of the de-couple supplies heating
circuit 1.
The condensing unit controls DHW loading
and heating circuit 1.
WTC connection:
MFA1: pump HK1
VA2: circulation pump WW1 (if available)
B1: external sensor
B2: de-couple sensor
B3: DHW sensor switch-on
T1: DHW outlet sensor
T2: DHW sensor switch-off
230V
↓
: voltage supply stratified tank
load pump
: PWM signal stratified tank load pump
KP2 (B)
WTC version K
Components:
WAS … Power
De-couple
Settings:
Direct DHW circuit: yes
Direct heating circuit: no
Factory setting:
P
2.2.1
: De-couple control
The condensing unit loads the DHW stor-
age tank or supplies the de-couple via the
internal three-way valve.
The condensing unit controls DHW loading.
Extension modules control the heating cir-
cuits downstream of the de-couple.
WTC connection:
MFA1: circulation pump WW1 (if avail-
able)
B1: external sensor
B2: de-couple sensor
B3: DHW sensor switch-on
T1: DHW outlet sensor
T2: DHW sensor switch-off
230V
↓
: voltage supply stratified tank
load pump
: PWM signal stratified tank load pump