4
Installation
Installation
1. Unscrew fi xing rings from selector switches, move all
four tappets to top of dial and remove outer case.
2. Slacken two screws securing plug-in module to
backplate and separate module from backplate by
pulling upwards.
3. Fix backplate to wall (3 hole fi xing).
4. Wire mains, motorised valve(s), thermostat(s)
according to instructions shown on page 6-7.
5. Secure cables under clamp bar.
6. Ensure all dust and debris has been cleared away
from the area then plug in programmer module and
re-tighten the 2 retaining screws - do not overtighten.
7. Switch on mains, turn both selector switches to
‘ON’ and light up boiler according to manufacturer’s
instructions.
8. With both room and cylinder thermostats turned up to
maximum, check the switching action of the 4033 with
a neon screwdriver or test lamp.
NOTE: This is a Class 1 product and must be earthed.
WATER SWITCH
(a) With selector switch in ON position, terminal 4
should be LIVE.
(b) With selector switch in OFF position, terminal 5
should be LIVE.
(c) With selector switch in TIMED position, terminal
4 should be LIVE between tappets A-B and C-D
and terminal 5 should be LIVE between tappets
B-C and D-A.
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