Gewiss GW 20 852 Installationsanleitung Seite 15

INSTALLATION INSTRUCTIONS
E L E C T R I C A L C O N N E C T I O N S
Example of connections to a boiler and timer to
control night time reduction
Multiple installations
In multiple installations (offices, schools, homes, etc.) where the night time reduction
is controlled from a single centralised timer, in addition to the above it is necessary to
pay close attention to the following
instructions:
1) Power supply 230V~
Terminal 4: connect to mains Line
(230V~)
Terminal 5: connect to mains
Neutral (return)
N.B.: normally with civil mains
power supplies "brown" is the
recognised colour for phase and
"blue" for neutral (line return).
2) Connections for night time
reduction
All terminals 6: connect in parallel
with output 2 of the timer.
All terminals 7: connect in parallel
with output 1 of the timer.
Power supply 230 V~
Inputs for night time
reduction control
Timer
switch
Timer switch
with contact NO,
common to all
the thermostats
15
Boiler
L N
230 V~
230 V~
L N
E
N
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S
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