Installation instructions 0020140122_04
7
3.2.3 Monozone mode: Open vent or system boiler with DHW cylinder, 3-Port Valve
9a
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
BUS
10e
12f
2
DHW
3
9k
BUS
BUS
BUS
BUS
1
1
12
9k
12f
3
8c
8f
5
DHW
1a
3
2
12f
38
230V ~
230 V~
3
1
230 V~
3
2
Key
1
Heat generator
1a
Back-up heater for domestic hot water
5
Monovalent domestic hot water cylinder
8c
Safety assembly for the potable water connection
8f
Expansion vessel for potable water
9a
Single-room temperature control valve (thermostatic/motor-
ised)
9k
3-port mixing valve
10e Line strainer with magnetite separator
12
System control
12f
VR 66/2 control centre
b
38 If a thermostat shall be used, instead of the DHW tempera-
ture sensor; remove the DHW temperature sensor, mount
the thermostat, and connect the thermostat on clamp ‘CYL’.
