34
BOILER INSTALLATION SEQUENCE
Connection details for external time
switches and boiler terminal strip.
Fig. I.15 shows the connection details
where a time switch is used without a
room thermostat to control the boiler.
Important: The arrowed numbers
indicate connection into the relevant
terminal in the boiler terminal strip.
If a room thermostat is to be
connected in addition to a time switch
the wire between the time switch
„ON“ terminal and boiler terminal 4
should be broken by the contacts of
the room thermostat (see schematic
layout, Fig. I.16).
Vaillant optional plug in timer
accessories
Refer to the instructions supplied with
the optional accessories for
connection details.
Upon completion of all electrical
connections refit the terminal box
cover by pushing into place. The
cover is secured by two locking clips.
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