24
The VORTEx Pro boiler requires a
230/240 V ~ 50 Hz supply. It must be
protected by a 5 Amp fuse.
Refer to Figures 8-1 to 8-5 for typical control
system wiring diagrams for all models.
Refer to Figures 8-6 and 8-7 for wiring
diagrams for all models.
The VORTEX Pro 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 I.E.E. 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
Electrical
8
Electrical
WARNING
!
8.1 Connecting the Power Supply
(Kitchen/Utility models only)
It is recommend that the boiler should be
connected to a switched mains power
supply from a programmer or control
system. If a Grant plug-in programmer is
used, a permanent 240 V mains supply
(fused at 5 Amp) must be taken to the
boiler. A three core cable is required to
connect the boiler terminal block to the
live supply. Refer to Figures 8-1 to 8-4 for
typical control system wiring diagrams.
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 procedure is:
1. Lift off the boiler case top panel, if it
has not already been removed.
2. Remove the top of the control panel
and open the cable clamp. Route
the supply cable through the hole in
the rear panel (using the grommet
supplied) up to the control panel,
pass it through the cable clamp and
connect to the boiler terminal block
as follows:-
Brown to live (terminal 1)
Blue to mains neutral (terminal 2)
Green/Yellow to mains earth
(terminal 3)
If the Grant plug-in programmer is not
fitted, ensure that the BROWN wire
link, between terminals 1 and 4 on the
boiler terminal block is fitted.
3. If the optional plug-in electronic
programmer is to be fitted, follow the
fitting instructions given in Section
8.2 at this point.
4. Secure the cable in the cable clamp.
5. Place the wiring cover in position over
the terminal block, taking care not to
trap any wires and secure in position
with the two M4 screws provided.
6. Ensure that all external wiring is
adequately supported.
do not switch on the electricity supply
at this stage.
8.2 Fit the Programmer
(Kitchen/Utility models only)
Ensure the electrical supply to the
boiler has been isolated before fitting
the programmer.
Remove the screws holding the back of
the control panel in place and move it
back enough to allow access to the rear
of the timer aperture and proceed as
follows:
1. From underneath the control panel,
remove the screw securing the
bracket behind the timer aperture.
Withdraw and discard the bracket.
2. Remove the blanking piece from
the timer aperture, in the control
panel fascia, by firmly pressing on
the centre of the square until it is
detached from the rear of the fascia.
Remove the blanking piece from the
panel and discard.
3. Refer to the wiring diagrams in
Figures 8-5 or 8-6 and wire the
programmer to the boiler terminal
block.
Programmer terminal N - Blue wire to
boiler terminal 1
Programmer terminal L - Brown wire
to boiler terminal 2
Programmer terminal CH ON - Red
wire to boiler terminal 5
Programmer terminal HW OFF -
Yellow wire to boiler terminal 6
Remove the BROWN link between the
boiler terminal 1 and 4.
4. Carefully fit the programmer into the
aperture and gently push fully home.
5. Connect the control system wiring
to the boiler terminal block. Refer
to Figures 8-1 to 8-4 for details
of typical system control wiring
diagrams.
CAUTION
!
NOTE
!
NOTE
!
NOTE
!
