Internal Diverter Valve With A Vented Cylinder And Dhw Cylinder Thermostat; Internal Diverter Valve With An Unvented Cylinder And Dhw Cylinder Thermostat Only - Bosch Worcester 7 716 192 566 Installation Instructions Manual

6.2 INTERNAL DIVERTER VALVE WITH A VENTED
CYLINDER AND DHW CYLINDER THERMOSTAT
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):
▶ Remove link - L /L
S R
▶ Connect room stat LIVE supply to terminal (L
▶ Connect room stat LIVE return to terminal (L
▶ Connect room stat NEUTRAL to terminal (N
NOTICE: Programmers/Timers:
▶ If any of the programmers/timers listed in the notice at
beginning of chapter 6 are used, the room thermostat
is incorporated in the transmitter. Therefore keep link
fitted across L /L .
S R
4. Hot water channel
– Volt free cylinder thermostat (ST8)
– Cylinder thermostat connects to ST8 terminals 7 and 9
NOTICE: ST8 Cylinder thermostat
▶ The cylinder thermostat must be volt free, i.e. not
connected to any voltage source.
5. Optional external frost stat connection (ST6):
▶ Connect frost stat wires to terminal (F
6. Diverter valve motor:
▶ Connect the Diverter valve motor harness to the Diverter valve motor
connection, refer to the circuit diagram in section 6.4.
brown
L
230V
green/yellow
E
MAINS
blue
SUPPLY
N
Room
Thermostat
neutral
live
switched live
L L
R S
6720645222-23.1Wo
Fig. 19 Vented cylinder with DHW thermostat
i System Diverter Valve kit 6 720 645 222 (2012/09)
)
S
)
R
)
S
) and (F )
S R
HOT WATER
CONTROL
THERMOSTAT
N N L
S
ST8
6.3 INTERNAL DIVERTER VALVE WITH AN UNVENTED
CYLINDER AND DHW CYLINDER THERMOSTAT ONLY
HOT WATER CHANNEL
▶ The wiring of the unvented cylinder dual thermostat must be
electrically separate.
▶ The cylinder dual thermostat must be connected to terminals 7 and 9.
NOTICE: ST8 Cylinder thermostat
▶ The cylinder dual thermostat must be volt free, ie. not
connected to any voltage source.
▶ Any factory fitted links within the dual thermostat must be removed.
▶ The safety limit thermostat must be wired to interrupt the mains 230
Volt supply to the boiler terminal S10.
brown
L
230V
green/yellow
E
MAINS
blue
SUPPLY
N
Room Thermostat
neutral
live
switched live
L L
R
Fig. 20 Unvented cylinder with DHW thermostat
NOTICE: RESET THE CONTROL BOARD
Following changes to the wiring of ST15 and ST8 the
control board will need to be reset to recognise the new
connection.
The power must be on to reset, all lights will flash to
confirm reset.
To reset the control board:
▶ Hold the Service mode "Spanner" and the Eco buttons
down for at least five seconds.
ELECTRICAL
*
DUAL THERMOSTAT
HIGH LIMIT HOT WATER CONTROL
THERMAL CUT-OUT THERMOSTAT
ST8
N N L
S S
6720645222-20.3Wo
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