Heating Circuit Control Unit - Viessmann vitotronic 200-h Installation And Service Instructions Manual

Function Description
Heating Circuit Control
40
Vitotronic 200-H, HK1B Installation and Service
Brief description
H Type HK1B:
The control unit has a control circuit for one heating
circuit without mixing valve M1 (heating circuit 1).
H Type HK1B (with accessory module for heating circuits
2 & 3):
The control unit has control circuits for one heating
circuit without mixing valve M1 (heating circuit 1)
and two heating circuits with mixing valve M2 (heating
circuit 2) and M3 (heating circuit 3).
H The set supply temperature of every heating circuit
is determined from the following parameters:
– Outside temperature
– Set room temperature
– Operating mode
– Heating curve slope and shift
H The supply temperature is regulated by the stepped
opening or closing of the mixing valves.
The mixing valve motor control changes the actuating
and pause times subject to the control differential
(control deviation).
H Upper control limit
Electronic maximum supply temperature limit (coding
address "C6" in the "Heating circuit..." group)
Factory set condition: 167° F (75° C)
H Lower control range limit
Electronic minimum supply temperature limit (coding
address "C5" in the "Heating circuit..." group)
Factory set condition: 68° F (20° C)
(only active in standard heating mode)
Functions
Time program
In accordance with the time program in the "Heating
and DHW" heating program, the control unit regulates
between "Central heating with standard room
temperature" and "Central heating with reduced room
temperature".
Every operating mode has its own set level.
4 time phases per day can be selected.
Outside temperature
A heating curve must be set for matching the control unit
to the building and the heating system.
The heating curve characteristics determine the set boiler
water temperature subject to outside temperature.
The control unit uses an average outside temperature.
This comprises the actual and the adjusted outside
temperature.