Viessmann Vitodens 200-W B2HA 88 Technical Data Manual page 27

Vitodens 200-W B2HA 88-150, 311- 530 Technical Data
Design and Function
Technical Data
Rated supply voltage:
Rated frequency:
Rated current:
Max. ambient temp.
- during operation:
Installation in living space
or boiler rooms (standard
ambient conditions)
- during storing
or transporting:
Electronic temperature
controller setting
(heating mode)
(can not be changed)
Models B2HA 88 to 530
Setting range for the
DHW temperature
Heating curve setting
- Heating curve slope:
- Heating curve shift:
Room
set-point
temperature
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
(continued)
120VAC
60 Hz
12A
32ºF to 104ºF (0ºC to 40ºC)
-4ºF to+149ºF (-20ºC to+65ºC)
185ºF (85°C)
50ºF to 154ºF (10ºC to 68°C)
0.2 to 3.5
-13 to 40 K
Outdoor temperature
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.
Boiler Control
27