Viessmann GC1 Installation And Service Instructions

54
System extension
DHW heating with a cylinder storage system (cont.)
Required coding
4C : 1 Primary pump connection on plug sÖA1
4E : 1 Motor connection for three−way mixing valve on plug gSA1
55 : 3 Cylinder thermostat  cylinder storage system
Automatic changeover
4b : 1 Connection of temperature sensor Vitotrans 222 on plug aJB
In conjunction with system version 2.
The sensor input aJB is used to
control Vitotrans 222. Therefore, the
shunt pump must be controlled by a
separate thermostat.
Required coding: "4d:2"
A Junction box, on site
B Shunt pump
C Control thermostat,
part no. Z001 886
In conjunction with system version 3.
A separate Vitotronic 050 must be
used for controlling the Vitotrans
222. The boiler control unit regulates
the constant raising of the return
temperature (see also coding
address "4E").
5862730GB
29
29
B
C
A
L
N
+

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English