4
Grant Vortex External Module
2 - USER INSTRUCTIONS
The boiler is fully automatic once switched on, providing
central heating (and also heating your domestic hot water
if you have an hot water cylinder fitted).
An illuminated On/Off switch, see Fig. A, is fitted to the
External modules, which lights when the boiler is switched
on, but does not necessarily indicate the burner is firing.
To access the External module controls, remove the front
panel by turning the handle and withdrawing it forwards
at the bottom.
Controls for External modules - Fig. A
1 Ensure that - There is sufficient fuel, of the correct
type, in the supply tank and all fuel supply valves are
open. The water supply is on. The electricity supply
to the boiler is off. The Boiler On/Off switch is set to
off (the neon in the switch is not alight). The Test
switch is set to Off. The room thermostat (if fitted) is
at the desired setting. The boiler thermostat is set to
the required setting.
2 Switch on the electricity supply to the boiler.
3 Set the Boiler On/Off switch to on. A neon in the
switch lights when it is in the on position.
The boiler will now light automatically.
About your boiler
2.1
Boiler controls (see Fig. A)
2.2
Lighting your boiler (see Fig. A)
2.3
BOILER ON/OFF SWITCH
ISOLATES PUMP(IF WIRED
INTO BOILER CONTROL
PANEL) & BURNER ONLY.
THIS COVER ISTO BE
REMOVED BYQUALIFIED
PERSONNELONLY
DO NOTREMOVE COVER
WITHOUTISOLATING
SWITCHED LIVEAND
FROST'STAT
PERMANENTLIVE
TESTSWITCH
OVERIDES SYSTEM
CONTROLSTO
OPERATE BOILER
‘Lock-out’ reset button
Boiler front
panel removed
Control Panel
DANGER
THERE IS MORE THAN ONE LIVE SUPPLY TO
THIS CONTROL PANEL
BOILER
OFF
OVERHEAT
RESET
TEST
SWITCH
OFF
HEATING
THERMOSTAT
ON ON
REFER TO WIRING DIAGRAM IN MANUAL
Overheat thermostat
reset button
(under screw cover)
Boiler
thermostat
Boiler
On/Off switch
Test
switch
DANGER
THERE IS MORE THAN ONE LIVE SUPPLY TO
THIS CONTROL PANEL
BOILER
OFF
OVERHEAT
RESET
TEST
SWITCH
OFF
HEATING
THERMOSTAT
ON ON
REFER TO WIRING DIAGRAM IN MANUAL
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