IDEAL Classic Combi NF 280 User Instructions

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.