Other Connection Facilities; External Heat Demand / External Heat Disable; Mixing Valve Motor - Viessmann Dekamatik-HK1 Installation Instructions Manual

Electrical Connections

Other Connection Facilities

External heat demand / External heat disable

When the "external heat demand" contact is activated, the mixing valve is opened.
When the "external heat disable" contact is activated, the mixing valve is closed.
External heat demand
or
external changeover of the heating program
External heat disable
Fig. 17
Connecting external heat demand / external heat disable

Mixing valve motor

Wall mounting fixture
Fig. 18
Connecting the mixing valve motor
18
1. In the plug-in connector
provided, connect a potential-
free contact for
- external heat demand
or
external changeover of the
heating program (see Service
Instructions for the coding
required) at terminals "3" and "2"
- external heat disable at terminals
"1" and "2."
2. Break open the cable bushing; install
strain relief clamp.
3. Insert connector
the terminal compartment (see
page 10); install strain relief clamp.
only with Dekamatik-HK 1 for wall mounting
H Connect the 4-wire cable from the
mixing valve motor to terminals "X3,"
"X4.1," "X4.2" and "X4.3" in the wall
mounting fixture of the Dekamatik-HK 1
as shown in Fig. 18.
Mixing valve open
Mixing valve closed
IMPORTANT
The Dekamatik-HK 1 incorporates a
120 V mixing valve output.
in socket "X 11" in