73
5784 568 - 13
Vitodens 100-W, B1HA/B1KA 26 to 125 Combi Installation/Service
Additional Information
Technical Data
(continued)
B1KA on demand hot water operation
Boiler Model No.
B1KA 35, 125
Max. Input NG and LPG
(DHW production only)
MBH
kW
149
43.7
Max. boiler temperature
(during DHW production)
ºF (ºC)
176 (80)
DHW supply temperature
ºF (ºC)
140 (60)
Continuous draw rate *
1
at
t= 77ºF (43K)
USG/min.
(L/h)
3.5
(795)
Max. flow through heat exchanger
USG/min.
(L/h)
3.7
(840)
Maximum allowable working pressure
(potable water)
psi
150
Test pressure
psi
300
Integrated pump flow rate
DHW production @ 23 ft. (9.8 m)
Head pressure
Heating system operation
with system side additional
drop in pressure of max. 6 ft. of water (1.8 m)
USG/min.
(L/h)
USG/min.
(L/h)
5.63
1278
6.2
(1408)
Expansion tank
*2
(for heating system side)
Precharge pressure
Capacity
psig
USG
(L)
12
2.1
(8)
*
1
DCW and DHW temperature rise would be proportional. Maximum DHW supply temperature is 140ºF (60ºC).
*2
Determine the required size of the expansion tank to be installed in the heating system.
If the integral expansion tank is insufficient, install a suitably sized expansion tank on site.