Pcb Connections - Worcester Greenstar Highflow 440CDi ERP Installation, Commissioning And Servicing Instructions

4.7.1

PCB Connections

1. Mains power 230 Volt connection ST10:
▶ Separate wires from cable end and strip to 6mm
▶ Connect LIVE wire to terminal L
▶ Connect NEUTRAL wire to terminal N
▶ Connect EARTH wire to the earth connector block next to ST10
Make the EARTH wire longer so that if the cable is
snagged, the EARTH wire is the last to be pulled out.
1.
1
Fig. 28 Mains connections
[1] These cable clamps are for EMS and sensor cables only
[2] These cable clamps are for 230 volt connections only
2. EMS connection BB for controllers and outdoor sensor
▶ EMS connection for intelligent controllers, e.g. Wave, Sense etc.
▶ These connections are not polarity dependant
3. Optional frost thermostat connection ST6:
▶ Connect frost thermostat supply wire to terminal F
▶ Connect frost thermostat return wire to terminal F
4. 230V room thermostat and/or external timer ST10:
▶ Remove link
▶ Connect room thermostat LIVE supply to terminal L
▶ Connect room thermostat LIVE return to terminal L
▶ Connect room thermostat NEUTRAL to terminal N
▶ Connect EARTH wire to the earth connector block next to ST10
ST10
2. 3.
Controllers
FROST
and
Outside sensor THERMOSTAT
F
A
1
ST8
2
4
B
L
P
B
Fig. 29
6720818077 (2016/04) -
Greenstar Highflow CDi
230V
ST10
L N N L L
S S R
L
E
N
ST10
2
S
R
S
R
S
EARTH = E
LIVE =
NEUTRAL =
SWITCHED LIVE =
4.
AND
/OR
ST10
L N N L L
S S R
E
ST6
N F F
P S R
ErP
5. Installer module for DHW timing
▶ Connect external timer NEUTRAL to top terminal
▶ Connect external timer DHW ON to bottom terminal
▶ Refit all panels
ST8
Fig. 30 External timer for hot water
Refer to manufacturers instructions when connecting external parts to
the boiler.
Worcester, Bosch Group cannot be held responsible for wiring errors.
INSTALLATION
Installer module
230V HW interface
ST10
5.
6720818077-30.1Wo
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