ROTEX Heating Systems GmbH
18
5.1.3
Dividing CH installation in groups in case of additional heat
sources
Operating principle
If the room thermostat switches off the boiler because another heat source (wood heater,
open fire etc.), the other rooms may cool down.
This can be resolved by splitting the CH
installation into two zones. The zone with the external heat source (Z2) can be shut off
from the main circuit by means of an electrical shut-off valve. Both zones are fitted with
their own room thermostat.
Please note: This regulation “external heat source” may only be applied if no extra
external boiler has to be heated up (installation type 1).
Installation instructions
1.
Install the valve in accordance with the connection diagram.
2.
Connect the room thermostat of zone 1 to X4 – 6/7.
3.
Connect the room thermostat of zone 2 to X4 – 11/12.
4.
Change parameter A (see Parameter settings via the service code par. 7.2).
Please note: The room thermostat in zone
1 MUST
be an on/off thermostat, the room
thermostat in zone 2 may be an OpenTherm thermostat or an on/off thermostat.
Connection diagram regulation “external heat source”
A. Boiler
B. Electrical shut-off valve 230 V ~
C. Radiators
T1. Room thermostat zone 1
T2. Room thermostat zone 2
Z1. Zone 1
Z2. Zone 2
