5
4000123942-2
Draining and Filling
Appliance Introduction
Diagram 1
BOILER DRAIN
VALVE
9744
The 24ci and 18si boilers are wall mounted modulating boilers
with electronic ignition providing central heating and hot water.
The boiler is of the II
2H3+
category and is for use with Natural
Gas (G20) as distributed in the United Kingdom, but can be
converted to use Butane (G30), Propane (G31) with the
appropriate kit.
The boiler has a fan assisted balanced flue which both
discharges the products of combustion to and draws the
combustion air from the outside of the room.
This boiler is not suitable for outdoor installation.
This boiler may be installed in any room, although particular
attention is drawn to the installation of a boiler in a room
containing a bath or shower where reference must be made to
the relevant requirements.
Any electrical switch or boiler control utilising mains electricity
should be placed so that it cannot be touched by a person using
the bath or shower.
In GB this is the current I.E.E. WIRING REGULATIONS and
BUILDING REGULATIONS.
In IE reference should be made to the current edition of I.S.813
"Domestic Gas Installations" and the current ETCI rules.
➜
(a)
(b)
(c)
Caution: The boiler is installed as part of a sealed system
which must only be drained and filled by a competent person.
If the mains electricity and gas are to be turned off for any long
periods during severe weather, it is recommended that the
whole system, including the boiler, refer to diagram 1, should
be drained to avoid the risk of freezing. Make sure that, if fitted,
the immersion heater in the cylinder is switched off.
If in doubt, consult your servicing company.
24ci Only
• If the boiler loses water: the pressure will be indicated, see
diagram 1 (a) and the boiler ON indicator (b) will flash red
indicating a fault. Fill the system by the filling device (c) at the
bottom of the boiler until the pressure gauge reads 1.0 bar.
A mains inlet pressure of 2.0 bar is required to reach a fill
pressure of 1.0 bar.
Reset boiler: refer to diagram 2, turn the On/Off switch to (0),
wait for five seconds. Turn the On/Off switch to ( I ) to reset the
appliance.
18si Only
• If the boiler loses water: the pressure will be indicated, see
diagram 1 (a) and the running lamp (b) will flash red indicating
a fault. Fill the system with the external filling device until the
pressure gauge reads 1.0 bar.
Reset boiler: refer to diagram 2, turn the On/Off switch to (0),
wait for five seconds. Turn the On/Off switch to ( I ) to reset the
appliance.
• Warning: Take care not to overfill the boiler. At a pressure of
2.5 bar or above indicating over pressure, the boiler ON
indicator (b) will flash red indicating a fault. The pressure must
be reduced to 1.0 bar by opening the drain valve, refer to
diagram 1. If the fault continues call the relevant Servicing
organisation or Glow-worm Service using the telephone number
on the inside front cover of this literature.
The central heating and domestic hot water (24ci only)
temperatures are user adjustable.
24 ci Only. Domestic hot water demand always has priority over
heating demand.
The boiler is designed for use as part of a sealed water central
heating system with fully pumped circulation. The pump,
expansion vessel and associated safety devices are all fitted
within the boiler.
The boiler can be installed against either an external wall or on
an adjacent inside wall, that is, the flue system will pass directly
to the rear or to either side to the terminal fitted on the outside
wall face.
These instructions should be carefully followed for the safe and
economical use of your boiler. The 'User Controls and Lighting'
section describes how to safely use the boiler.
Note: The boiler serial number is marked on the data label
attached to the rear of the control box.
Accessories
A range of accessories are available.
For further information contact your supplier.
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