Vitodens 200-W B2HA 88-150, 311- 530 Technical Data
27
5683 718 - 19
Boiler Control
Design and Function
(continued)
Heating Curve Adjustment (slope and shift)
The control unit regulates the boiler water temperature
(= supply temperature of heating circuit without mixing
valve) and the supply temperature of the heating circuit
with mixing valve (in conjunction with the accessory kit
for a heating circuit with mixing valve) according to the
outdoor temperature. The boiler water temperature is
automatically raised by 0 to 72 F / 0 to 40 K higher
than the currently required set supply temperature
(in the factory default setting the differential temperature
is 14.4 F / 8 K). See Start-up/Service Instructions for
coding address “9F” in coding level 2.
The supply temperature that is required to achieve a
given room temperature depends on the heating system
and the thermal insulation of the building that is being
heated.
The adjustment of the two heating curves is used to
match the boiler water temperature and the supply
temperature to these conditions. The boiler water
temperature is limited upwards by the fixed high limit
and the temperature set for the electronic high limit.
The supply temperature cannot rise above the boiler
water temperature.
Technical Data
Rated supply voltage:
120VAC
Rated frequency:
60 Hz
Rated current:
12A
Max. ambient temp.
-
during operation:
32ºF to 104ºF (0ºC to 40ºC)
Installation in living space
or boiler rooms (standard
ambient conditions)
-
during storing
or transporting:
-4ºF to+149ºF (-20ºC to+65ºC)
Electronic temperature
controller setting
(heating mode)
(can not be changed)
Models B2HA 88 to 530 185ºF (85°C)
Setting range for the
DHW temperature
50ºF to 154ºF (10ºC to 68°C)
Legend
A
Low temperature heating system,
e.g. radiant floor heating
B
Medium temperature heating system,
e.g. cast iron radiation, staple-up radiant floor heating
C
High temperature heating system,
e.g. fintube radiation, fan coils
Heating curve setting
-
Heating curve slope:
0.2 to 3.5
-
Heating curve shift:
-13 to 40 K
Boiler water or supply temperature
Room
set-point
temperature
Outdoor temperature
