Viessmann OpenTherm Installation And Service Instructions For Contractors

12
?
?
M
1~
230 V~
M
1~
?
M
40 20A 20B 52
1 2 3 4 5 6 1 2 3 4
sÖ A
Heating circuit pump for heating
circuit without mixer (on site)
sÖ B
Heating circuit pump for heating
circuit with mixer (on site)
fÖ
Power supply
gS
Mixer motor
LV connections
X 3.1 - X 3.2 Flow temperature sen-
sor for heating circuit
without mixer (immer-
sion temperature sen-
sor)
X 3.3 - X 3.4 OpenTherm connec-
tion of boiler control
unit
X 12.1 - X 12.2 OpenTherm room tem-
perature controller for
heating circuit with
mixer
X 12.3 - X 12.4 OpenTherm room tem-
perature controller for
heating circuit without
mixer
X 12.5 - X 12.6 Flow temperature sen-
sor for heating circuit
with mixer (contact
temperature sensor)
X 21 No function
X 22 No function
!
Please note
Electronic assemblies can be
damaged by electrostatic loads.
Before beginning work, touch an
earthed object such as heating
or water pipes to discharge any
static.
Installation sequence
Overview of electrical connections
5837721

Viessmann OpenTherm Specifications

General

Brand	Viessmann
Model	OpenTherm
Category	Temperature Controller
Language	English