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
156-196
12.6 Factory setting engineer level
WTC - Parameters (P)
Factory setting
Setting range
2.1.1
Burner rapid cycle interlock heating
mode
5 min
0 … 30 min
2.1.2
Maximum load heating mode
100 %
WTC 15: 18 … 100 %
WTC 25: 14 … 100 %
2.1.3
Maximum load DHW mode
100 %
WTC 15: 18 … 100 %
WTC 25: 14 … 100 %
2.1.4
Time forced partial load capacity heat-
ing mode
120 s
0 … 240 s
2.1.5
Controller switch differential operating
mode
4 K
0 … 20 K
2.1.6
Controller switch differential DHW
(1
KI: 6 K / KP: 8 K
0 … 20 K
2.2.1
Internal pump operating mode HC
(1
2.2.2
Internal pump operating mode DHW
Constant PWM
2.2.3
Pump capacity minimum heating mode
30 %
16 % … P
2.2.4
2.2.4
Pump capacity maximum heating mode
80 %
P
2.2.3
… 100 %
2.2.5
Pump capacity minimal DHW mode
30 %
16 % … P
2.2.6
2.2.6
Pump capacity maximum DHW mode
WTC 15: 45 %
WTC 25: 70 %
P
2.2.5
… 100 %
2.2.7
Minimum system pressure warning
0.8 bar
P
2.2.8
… 2.5 bar
2.2.8
Minimum system pressure burner lockout
0.5 bar
0.0 bar … P
2.2.7
2.2.9
Volumetric flow factor heating mode
90 %
0 … 100 %
2.2.10 Volumetric flow factor DHW loading
90 %
0 … 100 %
2.2.11 Maximum volumetric flow
WTC 15: 1300 l/h
WTC 25: 2200 l/h
0 … 10000 l/h
2.2.12 Inertia internal pump
4 s
1 … 30 s
2.2.13 Pump capacity boiler pump
WTC 15: 45 %
WTC 25: 70 %
20 … 100 %
2.2.14 Inertia DHW load pump
10 s
1 … 60 s
2.3.1
Gas quantity correction at start
0 %
-10 … 20 %
2.3.2
Load correction at start
0 %
-16 … 14 %
2.3.3
Correction speed for flue gas length
0 %
-8 … 10 %
2.3.4
Minimum load correction
0 %
0 … 21 %
2.3.5
Correction gas surge at start
0 %
-10 … 10 %
2.3.6
Gas valve offset storage
29 % (variable)
12 … 42 %
(1
depending on the hydraulic version set
Remote control - parameters (P)
Factory setting
Setting range
4.1
Voltage error input N1
2 V
0.5 … P
4.2
- 0.2 V
4.2
Voltage burner off input N1
3 V
P
4.1
+ 0.2 V ... 8.0 V
4.3
Minimum flow temperature input N1
8 °C
8 °C … P
4.4
4.4
Maximum flow temperature input N1
80 °C
P
4.3
… 80 °C
Hydraulic - parameters (P)
Factory setting
Setting range
5.2.2
Temperature differential flow/de-couple
pump
4.0 K
1.0 … 7.0 K