NOTE TO THE INSTALLER: LEAVE THESE INSTRUCTIONS ADJACENT TO THE GAS METER
Classic Combi NF 280
User's Instructions
Wall Mounted, Fanned, Balanced Flue Gas Boiler
Natural Gas Model
Classic G.C. Appliance No.
NF 280 47 415 08
2
Ideal Classic Combi NF
GAS SAFETY (INSTALLATION AND USE)
REGULATIONS, 1994.
It is law that all gas appliances are installed by a CORGI
registered installer identified by
in accordance with the above
regulations.
Failure to install appliances correctly could lead to prosecution. It
is in your own interest, and that of safety, to ensure the law is
complied with.
ELECTRICITY SUPPLY
This appliance must be connected to the supply via a double
pole switch fused at 3 Amps.
MINIMUM CLEARANCES
The minimum clearances given below MUST be complied with,
in order to maintain the safe running of the boiler and to facilitate
servicing.
Above the boiler 100 mm (4")
At each side of the boiler 5 mm (
1/4")
Underneath the boiler 100 mm (4")
In front of the boiler 450 mm (17
3 /4")
IMPORTANT NOTES
a. THIS APPLIANCE MUST NOT BE OPERATED WITHOUT
THE CASING CORRECTLY FITTED AND FORMING AN
ADEQUATE SEAL.
b. If the boiler is installed in a compartment then the
compartment MUST NOT be used for storage purposes.
c. The ventilation provided for the boiler during installation
MUST NOT be blocked and a check should be made
periodically that the ventilation areas are free from any
obstruction.
d. If it is known or suspected that a fault exists on the boiler
then it MUST NOT be used until the fault has been corrected
by a competent person.
It is essential that the instructions in this booklet
are strictly followed, for safe and economical
operation of the boiler.
The Classic Combi NF 280 is a combination boiler
providing both central heating and instantaneous
domestic hot water.
TO LIGHT THE BOILER.
Refer to the illustration on page 3
1. CHECK THAT THE ELECTRICITY SUPPLY TO THE
BOILER IS OFF.
2. Open the controls access door by hinging downwards.
3. Ensure that the burner on/off switch (C) is OFF and the CH/
HW switch (B) is set to HW ONLY. Also ensure that all hot
water taps are turned OFF.
4. Switch ON the electricity supply to the boiler and check that
all external controls, e.g. programmer, room thermostat, etc.
are ON.
If a programmer is fitted then refer to the instructions
provided.
5. Set the burner on/off switch (C) to ON and the CH/HW
switch (B) to the desired position. After about 15 seconds
the boiler will light automatically - this can be viewed
through the sight glass (A).
6. Close the controls access door.
OPERATION
In winter conditions, i.e. central heating and domestic hot
water, set the CH/HW switch (B) to CH & HW and the burner on/
off switch (C) to ON.
The boiler will fire and supply heat to the radiators but will give
priority to domestic hot water when required.
The domestic hot water pre-heat will operate as described under
' summer conditions', during periods when there is no call for
central heating, i.e. when the programmer and/or room
thermostat is OFF - unless it is also timed.
For summer conditions, i.e. domestic hot water only, set the
CH/HW switch (B) to HW ONLY and the burner on/off switch (C)
to ON.
The boiler will fire for approximately three minutes at low rate,
to pre-heat the domestic hot water calorifier. Thereafter it will
fire periodically for a few seconds in order to maintain the
temperature. This will occur 24 hours a day unless a
programmer is fitted, allowing the pre-heat to be timed - refer to
the separate Programmer Instructions.
Note.
With timed domestic hot water pre-heat, the domestic hot water
may take longer to attain maximum temperature at the beginning
of the ON periods.
CONTROL OF WATER TEMPERATURE
DOMESTIC HOT WATER
The domestic hot water draw-off temperature is limited by the
low rate gas control to approximately 700C at the minimum
water draw-off rate of about 3.5 litre/min. (0.8 gpm).
Additionally, the draw-off temperature is controlled by adjusting
the flow rate at the tap - the lower the draw-off rate, the higher
the temperature, and vice versa.
At higher domestic hot water draw-off rates (greater than 6.0
litre/min. - 1.3 gpm) the boiler will fire at full gas rate.
CENTRAL HEATING
The boiler control, firing at full gas rate, automatically maintains
the central heating radiator temperature at approximately 800C.
Ideal Classic Combi NF
3
TO SHUT DOWN THE BOILER
1. For short periods
Set the burner on/off switch (C) to OFF.
When heating is again required, reset the switch to ON.
2. For longer periods
Set the burner on/off switch (C) to OFF.
Switch the electricity supply to OFF.
WARNING.
If no frost protection is provided and frost is likely during a short
absence from home, leave the heating controls (if fitted) at a
reduced temperature setting.
For longer periods, the entire system should be drained including the domestic water supply. If the system includes a
frost thermostat then, during cold weather, the boiler should be
turned OFF at the time switch(es) ONLY. The mains supply
should be left switched ON, with the boiler thermostat left in the
normal running position.
BOILER OVERHEAT THERMOSTAT
The boiler is fitted with a safety 'cutout' thermostat. This will shut
down the boiler in the event of overheating. Should this occur
allow the boiler to cool, press the overheat reset button (D) then
relight as detailed in steps 1-5 in 'To light the boiler'.
If the cutout condition still persists turn off the boiler and consult
your local Corgi resgistered installer.
LOSS OF SYSTEM WATER PRESSURE
The gauge (E) on the Combi module indicates the central
heating system pressure.
If the red arrow on the pressure gauge (E) is set above zero and
the system pressure is seen to fall below this value over a
period of time then a water leak is indicated. In this event your
Corgi registered installer should be consulted.
DO NOT OPERATE THE BOILER IF THE PRESSURE HAS
REDUCED TO ZERO FROM THE ORIGINAL SETTING.
ESCAPE OF GAS
Should a gas leak be suspected, contact your local gas supplier
without delay.
Do NOT search for gas leaks with a naked flame.
CLEANING
For normal cleaning simply dust with a dry cloth.
To remove stubborn marks and stains, wipe with a damp cloth
and finish off with a dry cloth.
Do NOT use abrasive cleaning materials.
MAINTENANCE
The appliance should be serviced at least once a year by a
Corgi registered installer.
BOILER CONTROLS
C Burner On / Off switch
D Overheat thermostat reset
button
E Central heating pressure gauge
LEGEND
A Sightglass
B CH. /HW. Switch
View inside boiler controls area
Printed in England
January 1995 112 226 A01
Please use the following numbers for speedy assistance.
Spares.... ..................................... Tel: 01482 498 665
................................................... Fax: 01482 498 489
Customer Care & Technical Support.
Scotland/N. England/Midlands ..... Tel: 01482 498 636
Southern England/S. Wales ......... Tel: 01482 498 660
................................................... Fax: 01482 498 666
Publications/literature. ............... Tel: 01482 498 467
THIS SYMBOL IS YOUR
ASSURANCE OF QUALITY
These appliances are designed for use with Natural
Gas only. They have been tested and conform with the
provisions of BS. 6332 and BS. 5258.
CERTIFIED PRODUCT
Manufactured under a BS 5750 Quality
System accepted by BSI
Customer Care & Technical Support
CARADON IDEAL Ltd. pursues a policy of continuing
improvement in the design and performance of its products. The
right is therefore reserved to vary specification without notice.
CARADON IDEAL Ltd.,
P.O. Box 103, National Avenue,
Kingston upon Hull,
North Humberside. HU5 4JN.
Telephone: 01482 492 251 Fax: 01482 448 858.
Registration No. London 322 137.
Registered Office; National Avenue, Kingston upon Hull,
North Humberside, HU5 4JN.
A subsidiary of Caradon p.l.c
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