About Your Vortex Combi Boiler; Store Switch; Heating Switch; Boiler On/Off - Grant Combi 70 V3 User's Installation Manual

2.1

About your Vortex Combi boiler

Your Vortex Combi boiler is fully automatic once switched
on, and will provide domestic hot water at mains pressure
on demand and central heating when the boiler and
heating system controls call for it. The boiler On/Off
switch incorporates a 'mains on' neon, see Fig. B, which
lights when the boiler is switched on, but does not
necessarily indicate the burner is firing.
Your boiler may be fitted with either an internal electronic
7-day timer or mechanical 24-hour timer. Alternatively,
your installer may have fitted a separate timer, in a
convenient position remote from the boiler.
Whichever type of timer is connected to your boiler, it
will allow you to set the operating times of the central
heating. Domestic hot water is available continuously,
provided the boiler is switched on, irrespective of the
settings on the timer.
2.2 Boiler controls (see Fig. B)
To access the controls, pull off the front door from the
boiler.
1 Store switch - Allows the primary store to be
manually switched off if hot water is not required.
With the switch set to OFF, the burner will not fire
to maintain the water temperature in the store and
the hot water (store) pump will not operate.
IMPORTANT: The boiler will not produce hot
water when the Store switch is set to OFF.
2 Heating switch - When set to TIMED, the boiler
will only provide central heating during the 'on'
periods set on the timer. When set to OFF, the
boiler will not provide central heating. When set to
CONSTANT, the boiler provides central heating
continuously, overriding all of the timer settings.
Note: Provided the Store switch is set to ON, the
boiler will provide hot water on demand
irrespective of the setting on the Heating switch
and will override the heating as required to
maintain the temperature of the store.
3 Boiler On/Off - This switches the boiler on and off.
Note: The internal timer (if fitted) will still operate
with this switch set to OFF, provided that the electricity
supply to the boiler is still switched on, but the boiler
will not operate to provide domestic hot water.
4 Boiler heating thermostat - Controls the temperature
of the water leaving the boiler to the central heating
system. Operation of this control does not affect the
temperature of the hot water flowing to the taps.
4

2 - VORTEX COMBI USER INSTRUCTIONS

Combi V3, Combi Max and Vortex Combi models
2.3 About your fuel
Grant Vortex Combi boilers only operate on Class C2
Kerosene to BS 2869:1998.
You should always quote the type of fuel you require
when ordering from your supplier.
Do not wait until the fuel runs out before you order
some more. Sludge in the bottom of the tank may be
drawn into the fuel lines. If it is possible, switch off the
boiler when the new supply is delivered and leave the
fuel to settle for an hour before restarting the boiler.