Cable Preparations; External Controls - Domestic Installations; Commissioning; Pre-Commissioning Checks - Worcester Greenstar 8000 Life GR8300iW 30 R Installation And Maintenance Instructions Manual

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 55
▶ 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. 55 Mains voltage (power cables) preparation
Low voltage (signal cables), example  figure 56
0-30V
6-8mm
26-30mm
Fig. 56 Low voltage (signal cables) preparation
5.5.3

External controls - domestic installations

Appliance external control connections example
▶ The electrical power supply to the external equipment [2] is supplied
from 230V OUT - L (Live), N (Neutral) and \ (earth) terminals.
▶ The Switch Live from the external equipment [3]:
– Both pre-wired links are removed, the CH demands are combined
and wired to the (LR terminal.
▶ External frost thermostat connections [4]:
– The Live supply is terminal FS
– The Switch Live is terminal FR
Greenstar 8000 Life – 6720883866 (2019/04)
C
1
230V AC
230V 230V
PE
IN OUT
L N L N
Fig. 57 External controls connections example
[1] 230V mains supply to the appliance.
[2] 230V supply from the appliance to the wiring centre.
[3] CH Switch Live (Demand) from the external controls.
[4] External frost protection Live supply and Switch Live (Demand).
6

Commissioning

6.1

Pre-Commissioning checks

DANGER:
Risk of electric shock!
▶ Isolate electrical components from the power supply (230 V AC)
(fuse, circuit breaker) and secure against unintentional re-
connection before carrying out any work.
Information on safe isolation can be found in the Health and Safety
Executive guidance HSG85.
▶ Check for zero potential before proceeding with work, using test
equipment approved to GS38 to confirm that the electricity supply is
disconnected.
Checks before commissioning:
▶ Check that the service and water pipes are connected correctly.
▶ Check the gas type specified on the identification plate matches that
of the gas supply and that the gas supply is properly purged.
▶ Appliance converted to sealed system.
– Check that the appliance is filled with water and under pressure
(1.5 bar) and that there are no leaks.
▶ Check that the electrical connections of the appliance are correct:
– Mains electrical supply - 230V, 50Hz
– Compliant earth connection
– Correct polarities.
– External equipment and controls are wired in correctly.
▶ Check that the flue is correctly fitted, airtight, free from any
obstruction and the connections are secure.
▶ Check that the condensate pipe work is connected properly and that
there are no leaks.
NOTICE:
If the appliance is not to be commissioned immediately then, after
successfully completing all of the checks and any rectification work:
▶ Isolate the electricity supply.
▶ Isolate the gas supply.
▶ Drain the system and appliance.
▶ Label appropriately.
Commissioning
L
2
N
LR
FS
FR
PC0 PW2 PW1
LR LR FS FR N L N L N L
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37
3
4