istor HE260 & HE325

(Natural Gas Only)

G.C. Appliance No. see page 3 in installation section

Destination Countries: GB, IE

Introduction

The istor HE260 & HE325 are fully automatically controlled, condensing, system store, fan flued boilers.

Due to the high efficiency of the boiler, condensate is produced from the flue gases and this is drained to a suitable disposal point through the plastic waste pipe at the lower rear of the boiler. A condensate 'plume' will also be visible at the flue terminal.

The istor is a system store boiler providing both central heating and domestic hot water.

Wire the heater through a double-pole switch or controller, having contact separation of at least 3mm, using a cable size of at least 1.5sq. mm flexible cable, 85 o C rubber insulated

HOFR Sheathed, complying with BS6141 Table 8. It MUST be fully earthed. Ensure all terminal connections are securely made. Do not however use excessive force when tightening terminals.

Safety

Current Gas Safety (Installation & Use)

Regulations or rules in force.

In your own interest, and that of safety, it is the law that this boiler must be installed by a CORGI registered installer, in accordance with the above regulations.

It is essential that the instructions in this booklet are strictly followed, for safe and economical operation of the boiler.

Important Notes

! This appliance must not be operated without the casing correctly fitted and forming an adequate seal.

! If the boiler is installed in a compartment then the compartment MUST NOT be used for storage purposes.

! 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 CORGI registered installer.

! Flammable materials must not be placed in close proximity to the appliance. Materials giving off flammable vapours must not be stored in the same room as the appliance.

Electricity Supply (boiler)

This appliance must be earthed.

Supply: 230 V ~ 50 Hz. The fusing should be 3A.

Connection must be made in a way that allows complete isolation of the electrical supply such as a double-pole switch, having a 3mm (1/8") contact separation in both poles, serving only the boiler and system controls. Alternatively, a 3-pin

UNSWITCHED socket may be used. The means of isolation must be accessible to the user after installation.

Electricity Supply (immersion heater)

Supply: 230 V ~ 50 Hz. The fusing should be 13A.

The immersion heater is supplied fitted to the cylinder and is intended for use as a back up heat source for DHW should the boiler fail for some reason. Optimum DHW performance will not be achieved using the immersion heater only.

! Under NO circumstances should any of the sealed components on this appliance be used incorrectly or tampered with.

In cases of repeated or continuous shutdown a CORGI registered installer should be called to investigate and rectify the condition causing this and carry out an operational test. Only the manufacturers original parts should be used for replacement.

Minimum Clearances

Clearances of 165mm (6 1/2 ") above, 5mm (1/4") at the sides and 450mm (17 3/4") at the front of the boiler casing must be allowed for servicing.

All CORGI Registered Installers carry a CORGI ID card, and have a registration number. Both should be recorded in your

Benchmark Log Book. You can check your installer by calling CORGI direct on 0156 372 300.

THE LOG BOOK SHOULD BE COMPLETED AFTER

EACH SERVICE AND KEPT WITH THESE

INSTRUCTIONS.

2 istor - User's

1

BOILER CONTROLS

Legend

A. Boiler ON/OFF switch.

C. Display.

D. Reset button.

E. LED.

F. CH thermostat knob.

The minimum front clearance allowed when built into a cupboard is 5mm.

To light the boiler. Refer to Frame 1

Refer to the programmer section of these instructions to set the required programs.

1. CHECK THAT THE ELECTRICITY SUPPLY TO THE BOILER

IS OFF.

2. Set the mains ON/OFF switch (A) to OFF and CH thermostat knob (F) to maximum.

3. Ensure that all DHW 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.

5. Set the mains ON/OFF switch to ON.

The boiler will commence the ignition sequence, first supplying heat to preheat the domestic hot water and then to the central heating, if required.

Note. In normal operation the control unit display (G) will show codes:

Standby - no demand for heat.

CH being supplied.

DHW being supplied to reheat the cylinder.

During normal running the LED (E) will remain illuminated.

Note. If the boiler fails to light after 3 attempts the fault code

will be displayed.

Press the reset button (D) for 2 seconds then release. The boiler will repeat the ignition sequence. If the boiler still fails to light consult a CORGI registered installer.

Operation

Winter conditions - i.e. CH and DHW required.

The boiler will fire and supply heat to the radiators but will give priority to DHW on demand.

The DHW will operate as described under 'Summer conditions' during periods when there is no call for CH.

Summer conditions - i.e. DHW only required.

Set the CH external controls to OFF, or turn the CH thermostat knob (F) to minimum.

The boiler will fire periodically to maintain the DHW cylinder in a preheated condition and whenever there is a demand for

DHW.

Note. The pump will operate briefly as a self-check once every 24 hours, regardless of system demand.

During ignition, the LED (E) will flash.

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.

istor - User's 3

Control of water temperature

Domestic Hot Water

The DHW delivery temperature is controlled by thermostatic mixer within the tank module (see illustration below).

Pull off the lower door from its locating pegs and adjust the mixer valve to the required DHW delivery temperature.

IMPORTANT

60 o C is the recommended maximum temperature.

Central Heating

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

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

Approx. flow temperatures for the boiler thermostat settings are:

Central Heating

Knob Setting CH Flow

Temp o

C ( o

F)

Max

Min

82 (180)

30 (86)

4

Domestic Hot Water

Knob setting

DHW

Temp O C

Min

1

2

3

6

7

4

5

Max

48

52

56

61

65

30

34

39

43 istor - User's

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, and switch the electricity supply to OFF. For longer periods the entire system should be drained.

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 will be displayed. Press the reset button (D) and the boiler will relight.

If the fault recurs, turn off the boiler and consult a CORGI registered installer.

Flame failure

Should this occur a fault code will be displayed.

Press the rest button (D) and the boiler will relight.

If the fault recurs, turns off the boiler and consult a CORGI registered installer.

Loss of system water pressure

The gauge (see illustration below) indicates the central heating system pressure. If the pressure is seen to fall below the original installation pressure of 1-2 bar over a period of time then a water leak is indicated. In this event a CORGI registered installer should be consulted.

DO NOT FIRE THE BOILER IF THE PRESSURE HAS

REDUCED TO ZERO FROM THE ORIGINAL SETTING.

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 CORGI registered installer should be sought.

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, 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.

istor - User's 5

2

PROGRAMMER SET UP

Channel 1 (Radiator symbol) relate to the CH programme

Channel 2 (Tap symbol) relates to the DHW programme.

1. To set the time and day.

Move the right sliding switch to 'RUN'.

Press the 'HR' and 'MIN' simultaneously for 2-3 seconds.

Set the day button using the 'DAY' button.

Set the time pressing the 'HR' and 'MIN' buttons.

Approximately 15 seconds after setting the time and day the display will automatically pick up the time of day (the colon between the hours and minutes will flash).

6

2.

To set the CH programme.

Set the right sliding switch to the radiator symbol.

Note. There is an in built default programme of:

Mon-Fri ON 6:30

ON 16:30

Sat-Sun ON 7:00

ON 16:00

OFF 8:30

OFF 22:30

OFF 9:00

OFF 23:00

(An ON period is designated by a 'light bulb' symbol being present in the top right hand corner of the display).

Pressing the 'DAY' button allows the selection of:

Mon - Sun Separate days

Mon - Fri

Sat - Sun

Inclusive

Inclusive

Mon - Sat Inclusive

Mon - Sun Inclusive

Press the 'P' button to scroll through the ON and OFF times.

Press the 'HR' and 'MIN' buttons to change any of the pre-set times.

To save the desired times move the right sliding switch to RUN.

5. To operate the programmer.

Set the right sliding switch to RUN.

Set the left sliding switch to AUTO.

An ON period will be designated by a light bulb symbol in the top right hand corner of the display with either a '1' to designate CH programme ON or a '2' to designate DHW programme ON.

6. Manual Override CH.

To manually override the CH programme move the left sliding switch to 'I'.

Press the ' ' button ONCE.

3. To set the DHW programme.

Set the right sliding switch to the tap symbol.

Note.

The default programme is as the CH programme above, changing the times again is as above.

To save the desired times move the right switch to RUN.

The No. '1' will flash in the display for approximately 3 seconds, after which a light bulb symbol will appear in the display and the '1' will stop flashing.

To cancel the override move the left sliding switch to AUTO after approximately 3 seconds the '1' and the light bulb symbol will disappear.

4. To delete a switching time on CH or DHW

Set the right sliding switch to the radiator or tap symbol as required. Use button ‘P’ to flag up the desired switching time,

Then press button ' ' and P simultaneously for 3-4 seconds. The display will show a flashing 0.00 and the switching point is deleted.

7. Manual Override the DHW.

To manually override the DHW programme move the left sliding switch to 'I'.

Press the button TWICE.

The No. '2' will flash in the display for approximately 3 seconds, after which a light bulb symbol will appear in the display and the '2' will stop flashing.

istor - User's

To cancel the override move the left sliding switch to AUTO after approximately 3 seconds the '2' and the light bulb symbol will disappear.

8. Skip Function

Pressing the ' ' button ONCE for CH or TWICE for

DHW with the left sliding switch in the AUTO position will change the programmed switching until the next programme time is reached.

i.e. this function will turn an ON period to OFF and vice versa.

A '1' or '2' will appear in the display along with the light bulb symbol and ' '.

To remove this function press the ' ' button ONCE to select '1' (CH) and hold in for approximately 3 seconds.

The '1' or '2' along with the light bulb and ' disappear.

' symbol will istor - User's 7

The code of practice for the installation, commissioning & servicing of central heating systems

Caradon Ideal Limited. is a member of the Benchmark initiative and fully supports the aims of the programme.

Benchmark has been introduced to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency.

CERTIFIED PRODUCT

Manufactured under a BS EN ISO 9001:1994

Quality System accepted by BSI

Ideal Boilers, P.O. Box 103, National Ave, Kingston upon Hull,

HU5 4JN. Telephone: 01482 492 251 Fax: 01482 448 858.

Registration No. London 322 137.

Caradon Ideal Limited pursues a policy of continuing improvement in the design and performance of its products. The right is therefore reserved to vary specification without notice.

Ideal Consumer Helpline Tel: 01482 498 660 www.idealboilers.com