Cable Preparations; External Controls - Domestic Installations - Worcester Greenstar 2000 Installation And Maintenance Instructions Manual

5.5.2

Cable preparations

The appliance is factory-fitted with a 230V mains cable. It can be
replaced if a longer cable is needed or, if 230V external controls are
fitted, a multi-core cable.
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.
230V mains cable (power cables), example  figure 56
▶ 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. 56 Mains voltage (power cables) preparation
Low voltage (signal cables), example  figure 57
0-30V
6-8mm
26-30mm
Fig. 57 Low voltage (signal cables) preparation
Greenstar 2000 – 6 721 820 552 (2021/02)
C
5.5.3

External controls - Domestic installations

Applianace external control connections example
External frost protection:
▶ Proprietary external frost protection will only be able to be used if
external 230V controls are fitted (wired in parallel to the external
230V controls).
Worcester weather-compensating controls have built-in external
frost protection functionality ( Worcester controller Instructions
manual).
▶ The electrical power supply to the external equipment [2] is supplied
from LS (Live), NS (Neutral) terminals and PE - \ (earth) from the
earth bar.
▶ The Switch Live from the external equipment [3]:
– Heating (()/ zone controls connects to LR (Live Return)
terminal, remove the pre-wired link.
▶ External frost thermostat connections [4]:
– The Live supply is terminal LS.
– The Switch Live is terminal LR.
1
230V AC
L - L
S R
Fig. 58 External controls connections example
[1] 230V mains supply to the appliance.
[2] 230V supply from the appliance to the external controls.
[3] Heating (()/ zone Switch Live (Demand) from the external
controls.
[4] External frost protection Live supply and Switch Live (Demand).
Installation
N
2
L
3
L
R
OUT
4
IN
L L
N N
L
R
L
S
N
S
N
L
5AF
43