Glow-worm Betacom 24 - Page 35

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35
Diagram 10.1
10 Electrical Connection
BOILER
BLACK MAINS LEAD WHITE EXTERNAL CONTROL LEAD
FUSED MAINS
SPUR OR
FUSED 3 PIN
PLUG
POTENTIAL
FREE ROOM
THERMOSTAT
Internal time clock (factory fitted)
External potential-free room thermostat
617R01
BOILER
BLACK MAINS LEAD WHITE EXTERNAL CONTROL LEAD
Internal time clock (factory fitted) disconnected
External potential-free room thermostat
External potential-free programmer
FUSED MAINS
SPUR OR
FUSED 3 PIN
PLUG
ROOM
THERMOSTAT
PROGRAMMER
617A
BOILER
BLACK MAINS LEAD WHITE EXTERNAL CONTROL LEAD
FUSED MAINS
SPUR OR
FUSED 3 PIN
PLUG
Internal time clock (factory fitted) disconnected
External potential-free chrono-thermostat
617B_R01
PROGRAMMABLE
ROOM THERMOSTAT
1) INTERNAL TIME CLOCK WITH EXTERNAL
ROOM THERMOSTAT
If a room thermostat is required it must be connected to
the external controls lead as shown, using a suitable elec-
trical connection.
2) CONNECTION WITH EXTERNAL PRO-
GRAMMER
Any eventual external programmer must be connected in
series with the room thermostat.
IMPORTANT: the boiler time clock must be put on po-
sition “I” (see Diagram 10.2).
3) CONNECTION WITH EXTERNAL
PROGRAMMABLE ROOM THERMOSTAT
As an alternative solution it is possible to connect a
single external programmable room thermostat which
makes the double function of a room thermostat and a
programmer (see fi gure 3)
IMPORTANT: the boiler time clock must be put on po-
sition “I” (see Diagram 10.2).
Diagram 10.2
REMARK: In case of installation of an
external programmer or chronothermo-
stat (see Diagram 10.1) the internal time
clock (factory fi tted) must be put on
position “I” (always ON)