Electrical; Internal Diverter Valve With A Vented Cylinder - Worcester Gas boiler Installation Instructions Manual

ELECTRICAL

5 ELECTRICAL
NOTICE:
B Mains supply to the boiler must be through a fused double pole isolator situated adjacent to the
appliance. The isolator must have a contact separation of 3mm minimum in both poles. External fuse
rating 3A.
B When stripping wires always ensure copper strands do not fall into the control box.
B There should be no external wiring centre.
B A fascia mounted twin channel programmer must be used.
Timers available:
DT20 Twin Channel Programmer (7 716 192 038),
DT10RF Digistat (7 716 192 052),
DT20RF Digistat (7 716 192 054).
5.1

INTERNAL DIVERTER VALVE WITH A VENTED CYLINDER

ACCESS TO ELECTRICAL CONNECTIONS:
Remove boiler casing to access control panel.
1. Unscrew the single screw and lower the control box
into the horizontal position.
2. Unscrew the three screws in the control panel and
pull off the connections cover.
3. 230V room thermostat with timer 7 716 192 038
(ST10):
B Remove link - L /L
S R
B Connect room stat LIVE supply to terminal (L
B Connect room stat LIVE return to terminal (L
B Connect room stat NEUTRAL to terminal (N
NOTICE:
B If the timer 7 716 192 052 or 7 716 192
054 is used, the room thermostat is
incorporated in the transmitter.
Therefore keep link fitted across L
4. Hot water channel
5. Optional external frost stat connection (ST6):
B Connect frost stat wires to terminal (F
6. Diverter valve motor (ST17):
B Connect electrical harness from diverter valve motor
to ST17 (see following page).
12
DT20 Twin Channel
)
S
)
R
)
S
Fig. 17
/L .
S R
) and (F )
S R
Room Thermostat
neutral
Programmer
live
switched live
Cylinder
temperature
sensor
L L
R
ST10
6 720 645 222a (2012/05)
230V
MAINS
SUPPLY
L
N E
N L
N
S S
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