Cable Preparations; External Controls - Domestic Installations - Bosch Worcester Greenstar 8000 Series Installation And Maintenance Instructions Manual

Installation
5.5.2

Cable preparations

NOTICE:
Damage to control unit!
Small pieces of wire can cause shorts and damage to electronics.
▶ When stripping wires always ensure copper strands do not fall into
the control box.
Mains voltage (power cables), example  figure 58
▶ Ensure the conductors (C) can reach the appropriate terminal
connection and that the protective (earth) conductor is longer than
the other wires.
– Power cables connected to the appliance my have different
conductor lengths depending on the termination point.
230V
6-8mm
6-8mm
N
L
> C
Fig. 58 Mains voltage (power cables) preparation
Low voltage (signal cables), example  figure 59
0-30V
6-8mm
26-30mm
Fig. 59 Low voltage (signal cables) preparation
5.5.3

External controls - domestic installations

External equipment or Integral diverter valve kit:
▶ External diverter valve(s) and all other 230V parts are not supplied
with the appliance.
▶ There is an optional integral diverter valve kit, this requires fitting a
diverter valve, internal pipe -work, cylinder sensor & connection.
See optional diverter valve kit instructions for full details. This kit also
allows for the Worcester controls options to be used, which details
can be found in the diver valve kit instructions.
▶ The power supply to external controls must be taken from the
appliance; an alternative power supply must not be used.
Appliance external control connections example
▶ The electrical power supply to the external equipment [2] is supplied
from 230V OUT - L (Live), N (Neutral) and PE - \ (earth) terminals.
▶ The Switch Live from the wiring centre [3]:
– Both pre-wired links are removed, the CH & DHW demands are
combined and wired to the (LR terminal.
– Control for appliance Pre-heat function, optional.
The flow temperature must be set on the central heating control to
a level at least 10 °C above the required cylinder temperature set
on the cylinder control thermostat.
▶ External frost thermostat connections [4]:
– The Live supply is terminal FS
– The Switch Live is terminal FR
38
C
1
230V AC
230V 230V
PE
IN OUT
L N L N
Fig. 60 External controls connections example
[1] 230V mains supply to the appliance.
[2] 230V supply from the appliance to the wiring centre.
[3] CH & DHW Switch Live (Demand) from the external controls.
[4] External frost protection Live supply and Switch Live (Demand).
Greenstar 8000 Style – 6720883855 (2019/01)
L
2
N
LR
FS
FR
PC0 PW2 PW1
LR LR FS FR N L N L N L
0010022788-001
3
4