Outdoor Condensing Combi User Instructions - Grant Combi 90 V3 User, Installation & Servicing Instructions

2.1
About your Outdoor Condensing Combi
\
Your Grant Condensing 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 installer may have fitted either:-
a) A simple timer - either 7-day or 24-hour timer, to control
the central heating operation of the boiler only, or
b) A programmable room thermostat, to control the central
heating operation of the boiler only, or
c) A 2-channel programmer to control the central heating
On/Off times AND allow the hot water to be switched off
when required.
Whichever type of time control is used, it will allow you to set
the operating times of the central heating. Domestic hot water
will be available continuously, irrespective of the central
heating settings, UNLESS the hot water is set to OFF on the
programmer (if fitted).
2.2
\
Boiler controls (see Fig. B)
To access the Outdoor module controls, remove the front
panel by turning the handle at the bottom and pull it
1 On/Off switch - This switches the boiler on and off.
forward at the bottom.
Note: The boiler will not supply central heating OR
domestic hot water if this switch is set to OFF, but the built
in frost thermostat will still operate - provided that the
electrical supply to the boiler is still switched on.
2 Test switch - This is for the Service engineer to use and
should be left set to OFF.
3 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 - OUTDOOR CONDENSING COMBI USER INSTRUCTIONS

Outdoor Combi 90 V3, Combi Max and Condensing Combi
2.3
\
About your fuel
Grant Condensing 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.