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

1 - OUTDOOR COMBI 90 V3 and COMBI MAX USER INSTRUCTIONS
1.1
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About your Combi V3 or Combi Max Boiler
Your Grant Combi boiler is fully automatic when the
boiler On/Off switch is set to 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.
Your installer may have fitted either:
A simple timer - either 7-day or 24-hour timer, to
control the central heating operation of the boiler only,
or a programmable version.
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).
1.2
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Boiler controls (see Fig. A)
To access the Outdoor Combi controls, remove the front
panel by turning the handle at the bottom and pull it
forward at the bottom.
1 Boiler On/Off switch - This switches the boiler on and
off.
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 Burner and Pump switches - These switches isolate
the burner and pump respectively and are intended
for the service engineer to use.
They should NOT be switched off during normal use
of the boiler.
3 Test switch - This is also for the Service engineer to
use and should be left set to OFF.
4 Boiler thermostat - This control allows adjustment of
the temperature of the water leaving the boiler to heat
either the radiators or the hot water, via the hot water
heat exchanger.
The boiler thermostat has an operating range of 75˚C
to 85˚C. For optimum hot water operation, ensure
this is set to maximum.
Outdoor Combi 90 V3, Combi Max and Condensing Combi
1.3
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Useful tips
To ensure that the hot water performance is not
reduced first thing in the morning, or in the evening
if the heating is off through the day, set the heating
timer/programmer to switch the heating on at least
30 minutes before hot water will normally be
required in the morning (or evening).
If a timer/programmer has been fitted, it is useful to
remember when setting the times for the 'on' periods that
it might take up to an hour for the house to become warm,
especially in colder weather. Also the effect of the central
heating will remain for a time when the central heating is
turned off.
1.4
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About your fuel
The boiler will operate on either Class C2 Kerosene or
Class D Gas Oil to BS 2869:1998. Your Installer will have
informed you of the type of fuel your boiler has been set
to use and he will have marked this on the boiler data
label. You should always quote the type of fuel you
require when ordering from your supplier.
Note: Low level flue installations ( flue terminal
directly from the Outdoor module case) must only be
used with Kerosene.
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.
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