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icos

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Users

Control of water temperature

The boiler controls the central heating radiator temperature to a
maximum of 82

0

C, adjustable via the CH thermostat knob (C).

Approx CH flow temperatures for the boiler thermostat settings
are:

Knob Setting

Flow Temperature

C

F

Minimum

30

86

Maximum

82

180

To shut down the boiler

1. For short periods

Set the mains on/off switch (A) to OFF.

2. For longer periods

Set the mains on/off switch (A) to OFF.  Switch the electricity
supply to OFF.    For longer periods the entire system should be
drained, inlcuding the domestic hot water supply.

To relight the boiler

Repeat the procedure detailed in 'To light the boiler'.

Frost Protection

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.
If the system includes a frost thermostat then,during cold
weather, the boiler should be turned OFF at the time switch (if
fitted) ONLY.  The mains supply should be left switched ON, with
the boiler thermostat left in the normal running position.

Boiler Overheat Thermostat

This thermostat will shut down the boiler in the event of
overheating.  Should this occur a fault code 'L' 'A' will be
displayed.  Press the reset button (D) and the boiler will relight.
If the fault recurs turn off the boiler and consult a Gas Safe
Registered Engineer or in IE a Registered Gas Installer (RGII).

Flame failure

Should this occur a fault code 

L-F

 will be displayed.  Press the

reset button and the boiler will relight.  If the fault recurs, turn off
the boiler and consult a Gas Safe Registered Engineer or in IE a
Registered Gas Installer (RGII).

Condensate Drain

The condensate drain must not be modified or blocked.

Blockage of the condensate drain, caused by debris or freezing,
can cause automatic shutdown of the boiler.

If freezing is suspected and the pipe run is accessible an attempt
may be made to free the obstruction by pouring hot water over the
exposed pipe and clearing any blockage from the end of the pipe.
If this fails to remedy the problem the assistance of a Gas Safe
Registered Engineer or in IE a Registered Gas Installer (RGII).

Escape of gas

Should a gas leak or fault 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 use a damp cloth and mild
detergent.
DO NOT use abrasive cleaning materials.

Maintenance

The appliance should be serviced at least once a year by a Gas
Safe Registered Engineer or in IE a Registered Gas Installer (RGII).

CAUTION. 

 

To avoid the possibility of injury during the installation, servicing or cleaning

of this appliance care should be taken when handling edges of sheet steel components.

Legend

A

Boiler on/off switch

C

CH thermostat knob

D

Reset button

E

LED

F

Display

G

Condensate drain

1

BOILER CONTROLS

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Summary of Contents for icos HE12

Page 1: ...ance use only spare parts that you can be assured conform to the safety and performance specification that we require Do not use reconditioned or copy parts that have not been clearly authorised by Ideal Boilers HE12 HE15 HE18 HE24 For installation guide see reverse of book back ...

Page 2: ... C Appliance No 41 397 95 HE15 G C Appliance No 41 397 83 HE18 G C Appliance No 41 397 84 HE24 G C Appliance No 41 397 85 z Children should be supervised to ensure that they do not play with the appliance In cases of repeated or continuous shutdown a Gas Safe Registered Engineer or in IE a Registered Gas Installer RGII should be called to investigate and rectify the condition causing this and carr...

Page 3: ...lt a Gas Safe Registered Engineer or in IE a Registered Gas Installer RGII Flame failure Should this occur a fault code L F will be displayed Press the reset button and the boiler will relight If the fault recurs turn off the boiler and consult a Gas Safe Registered Engineer or in IE a Registered Gas Installer RGII Condensate Drain The condensate drain must not be modified or blocked Blockage of t...

Page 4: ... heating or domestic hot water Test by overriding the programmer by setting to continuous Check room thermostat for central heating or the cylinder thermostat for domestic hot water are set at the required temperature To test operation of either thermostat turn fully up If no response contact your installer Boiler is not working for central heating or hot water and the display shows L A L A L A L ...

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