Glow-worm 23c - Manual (Page 4)

4 2000225000B
The 23c boiler is a wall mounted modulating combination boiler
with electronic ignition providing central heating and
instantaneous hot water.
The boiler is of the I2H category for use with Natural Gas (G20)
as distributed in the United Kingdom.
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.
The boiler is suitable for top outlet flue connection only but can
be fitted with horizontal flue, vertical flue or twin-pipe flue. Refer
to flue options guide for further information, this is available from
your nearest stockist.
Both the central heating and domestic hot water temperature
are user adjustable from the boiler control panel.
Domestic hot water demand always has priority over heating
demand.
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.
The installation must be carried out by a qualified registered
person in accordance with the relevant requirements of The
Building Regulations, The Water Byelaws, The Building
Standards (Scotland) Regulations and any applicable local
regulations.
These instructions should be carefully followed for the safe and
economical use of your boiler.
Electrical Supply
WARNING: This boiler must be earthed.
All system components shall be of an approved type and shall
be connected in accordance with the current issue of BS7671
and any applicable local regulations.
All external wiring between the appliance and the electrical
supply and earthing requirements shall comply with the current
IEE Regulations.
Connection of the boiler and system controls to the mains
supply must be through a common isolator and must be fused
3A, maximum. This method of connection must be by a fused
double pole isolating switch, with a minimum contact separation
of 3mm on both poles. The switch should be readily accessible
Introduction
and preferably adjacent to the appliance. It should supply the
appliance only and be easily identifiable as so doing.
Alternatively, an unswitched shuttered socket outlet and 3A
fused 3 pin plug, both to the current issue of BS1363 may be
used provided that they are not used in a room containing a bath
or shower.
Wiring to the boiler must be PVC 85 o C insulated cable, not less
than 0.75mm 2 (24/0.20mm).
Gas safety (Installation and use) Regulations
In your interests and that of gas safety, it is the law that ALL gas
appliances are installed and serviced by a qualified registered
person in accordance with the above regulations.
Gas leak or fault
If a gas leak or fault exists or is suspected, turn the boiler off and
consult the local gas supply company or your installation/
service company.
Air in the heating system
Persistent air in the heating system may indicate leaks in the
system or corrosion taking place. Call your Installation/Servicing
company.
Overheating safety
In the event of a problem, the overheating safety devices cause
safety shutdown of the boiler. If this happens, call your
Installation/Servicing company.
Boiler controls
The control panel, located at the lower front of the boiler casing,
see diagram 1, allows the boiler to be started, shut down,
controlled and monitored during use.
Flue
Do not obstruct the outside terminal of the flue.
Ancillary equipment
A range of flue accessories are available including vertical
flues, twin-pipe flues, bends etc.
For further information contact your supplier.
Controls and lighting
Your 23c boiler has been factory configured to operate at the
heart of an existing installation. However, because many
installations are specially designed, do not hesitate to contact
your installer who will be able to ensure that you get the best
performance from your installation, by adjusting the heating
circuit's maximum output or temperature.
Once these settings have been made, you can still adjust the
temperature to suit your needs.
Central heating adjustment
The selector switch enables you to vary the temperature of the
water in the central heating circuit from the minimum setting
(approx. 38˚C) up to the maximum temperature set by your
installer. Most of the time, the mid position will meet your needs
but the selector should be moved nearer to the maximum
setting in very cold weather when your home is not reaching the
required temperature.
Domestic hot water
The selector switch can be adjusted from a temperature of
(approx. 35˚C up to 60˚C or more).
The ECO setting is ideally suited for all the requirements of
normal family use (showers, washing up etc.). The maximum
setting should be reserved for occasional use when very hot
water is required.