Electrical Connection - Bosch Worcester 2000 Series Installation And Maintenance Instructions Manual

Installation
▶ The three replacement retaining screws [4] supplied with the
adaptor kit are used to secure the vertical adaptor [B].
Fig. 45 Flue turret/adaptor connection
5.5

Electrical connection

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.
34
1
2
A
1
3
B
4
3
0010023595-001
Electrical considerations:
▶ All electrical work must be carried out by a competent and authorised
person.
▶ All work must comply with the current IET Wiring Regulations.
▶ The isolator shall be situated next to the appliance for new systems
and, where practicable, replacement appliances.
▶ The mains electrical supply to the appliance must be through a fused
double pole isolator.
▶ The isolator must have contact separation of 3mm minimum between
poles. Any system connected to the appliance must not have a
separate electrical supply.
▶ Any additional components that are connected to the appliance that
require 230 Volts must be connected to the same supply as the
appliance.
▶ The correct type of RCD must be employed where additional
protection is required that is suitable for a low energy DC modulating
pump according to IET wiring regulations.
▶ External fuse 3 Amps.
▶ When stripping the wires, ensure copper strands do not fall into the
control box.
NOTICE:
Risk of damage from hot appliance components.
Hot appliance components can damage electrical cables.
▶ Ensure all electrical cables are in the correct cable guides and away
from hot appliance components.
NOTICE:
Risk of damage to control board!
Mains/230V damage to low voltage control board.
▶ Do not connect mains/230V to the control board other than
power supply cable provided with the appliance.
▶ Time and temperature controls are low voltage.
Use Comfort+ II RF provided or approved controller listed in 3.9.2
"Programmer/timer accessories".
Cable routing
▶ Route cables through support guides and retaining clips.
▶ Run power cables separately from signal cables. Interference from
power cables can induce spurious faults on signal cables, ensure that
there is at least 100mm separation from each other.
▶ Ensure the cables are of sufficient length to allow the control box to
be moved to the service position.
Worcester 2000 – 6 721 814 551 (2019/09)