Thermostatic Radiator Valves; Vcw-Terminal - Vaillant VCW 2O Instructions For Installation And Servicing

a
1,7, Thcrmostatic radiator valves
l$rere TRVs and a clock are used the
ilibfrirg
side of the clock is connected
betreen teminals 3 and 4.
lYhere no clock is used a wire bridge must be
inserted between lerminals 3 and 4.
Setthe pump control to position ll.
VCW-Terminal
VAILLANT
Roomthermostat
VBT378
0
RANDALL
TimeSwitch 103
Do not link
terminal3 & 6
N Mains
L Supply
I
F i g . 2 1
24OV/5OHz
VCW-Terminal
SWITCHMASTER 300 Time Switch
REMOVE
1) Link N and 2
2) Link L and:4
N Mains
L Supply
3
O
VAILLANT
Roomthermostat
VRT378
0
24OVlsOHz
1 5