Electrical; General; Connecting The Power Supply - Grant Vortex Series Installation And Servicing Instructions

8

ELECTRICAL

! WARNING !
Ensure that the electrical supply has been isolated before
making any connections to the boiler.
8.1

GENERAL

The Vortex Pro Outdoor Combi requires a permanent ~230 V 1ph
50Hz supply. It must be protected by a 5 Amp fuse.
Refer to Figure 8-1 for the control panel wiring diagram for all
Vortex Pro Outdoor combi models.
Refer to Figures 8-2 and 8-3 for wiring diagrams showing how to
connect the control system.
! WARNING !
The Vortex Boiler contains electrical switching equipment
and must be earthed.
The supply must be fused at 5 Amp and there must only be one
common isolator for the boiler and control system, providing
complete electrical isolation.
A fused double pole switch or a fused three pin plug and shuttered
outlet socket should be used for the connection.
The power supply cable should be at least 0.75 mm² PVC as
specified in BS 6500, Table 16.
All the wiring and supplementary earth bonding external to
the boiler must be in accordance with the current IET Wiring
Regulations.
Any room thermostat or frost thermostat used must be suitable for
use on mains voltage.
In the event of an electrical fault after installation of the boiler, the
following electrical system checks must be carried out:
• Short circuit
• Polarity
• Earth continuity
• Resistance to earth
! NOTE !
If the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
Page 22
8.2 CONNECTING THE POWER
SUPPLY
The Vortex Pro External Combi is supplied fitted with an electrical
isolation plug, located in the left hand end of the boiler control
panel. All electrical wiring to the boiler must be made to this plug.
! NOTE !
Ensure that the route and length of the supply cable
is such that the boiler front cover plate can be easily
removed without disconnecting the supply cable from the
terminal block.
The isolation plug is connected to the power supply and heating /
hot water controls as follows:
1. The isolation plug is located on the control panel. Pull the
plug to the left to remove it from the socket in the left hand
end of control panel.
2. Remove the two screws and prise off the cover from the plug
to gain access to the five terminals.
! NOTE !
Pass the cable from the electrical power supply and
heating / hot water controls through the cable clamp on the
underside of the control panel before making connections
to the isolating plug.
3. Connect the electrical supply and heating / hot water controls
to the terminals in the isolating plug as follows:
• Terminal L1 - Heating on (from Timer, Thermostat or
Programmer).
• Terminal L2 - Hot water on (from Programmer).
• Earth Terminal - Green / Yellow to mains Earth.
• Terminal N - Blue to mains Neutral.
• Terminal L3 - Brown to mains Live (including permanent
live for Frost Thermostat).
The terminal numbers are marked on the top cover
of the plug. Refer to Sections 8.2 and 8.3 for details of
controls wiring BEFORE making connections to the
isolating plug.
Section 8: Electrical