þÿ

introduction

an appliance for any application

product features

building regulation compliance

isar HE

8-11

istor HE

12-15

isar HE & istor HE fluing options

16-23

isar HE & istor HE
extras and accessories

24-25

excel HE

26-29

excel HE fluing options

30-35

excel HE extras and accessories

36-37

mini HE

38-41

mini HE fluing options

42-47

mini HE extras and accessories

48-49

high level flue outlet kit &
flue length graphs

50-51

supporting the installer

heat-only and system boiler options

notes

54-55

contents

Boiler accessory pages

Fluing option pages

Technical information
pages

Boiler output pages

Warranty

Easier Navigation

Throughout this brochure you will

find these symbols, making it

easier to access relevant

information.

Colour Code

Each boiler type has a colour

reference, these are:

isar HE

istor HE

excel HE

mini HE

introduction

Welcome to the range of HE combination boilers and system storage boilers from

Ideal. Throughout you will find that exceptional reliability has been our overriding

goal, and that the needs and expectations of the installer have been uppermost in

our considerations.

World class manufacturing

Ideal is one of the most respected names in the heating industry and the only

company in its field to have achieved `World Class Manufacturer' accreditation in the

prestigious IBM and London Business School UK manufacturing survey. For over 90

years we have been designing, refining and manufacturing appliances that are not

only trusted by the trade, but also relied upon by homeowners the length and

breadth of the country.

Our Hull-based factory is part of only 2% of all manufacturing sites in the UK that

have been independently judged as meeting the criteria for World Class

Manufacturing status, while our superior manufacturing facilities mean that we can

achieve `right first time' quality. In accordance with the company's World Class

status, we have adopted a programme of continuous improvement which ensures

that we constantly measure and monitor our performance to drive improvement

through innovation.

Dedicated to excellence

Everyone at Ideal is committed to delivering incomparable quality. Which is why

these products have been created to lead the way in innovative engineering, inspired

design and, above all else, exceptional standards of reliability.

Engineered for peace of mind

The components which have been used throughout the appliances are not only

manufactured to extremely high technical specifications, they are also common

across the range. As a result, the range of HE boilers are dependable, simple to

understand and require minimal maintenance and servicing.

To ensure this dependability, each of our boilers is also subjected to an

extraordinarily stringent regime of product assessment. This includes rigorous

application testing, as well as extensive laboratory and field trials.

What's more, the versatile design, which includes no compartment ventilation and

twin-pipe fluing, makes siting extremely flexible - meaning minimum hassle at no

extra cost for the installer.

Glossary of terms

= fan-flued boiler

TRV

= thermostatic radiator valve

= central heating

DHW = domestic hot water

PCB = printed circuit board

an appliance for any application

isar HE high-efficiency combination boiler

The Ideal isar HE high-efficiency combination boiler provides flexibility of siting,

together with advanced reliability, and has all the necessary components incorporated

into the product to enable easy installation to a fully pumped sealed system and

delivers mains pressure hot water.

The boiler is ideal for meeting the heating requirements for the majority of houses

and is available in three models, isar HE 24, HE 30, and HE 35.

istor HE high-efficiency boiler

A complete heating and unvented hot water system in a single unit gives a simple

and space saving installation. The Ideal istor HE high-efficiency boiler ensures low

running costs in conjunction with a fast recovery cylinder for large quantities of mains

pressure hot water. The istor HE is available in two models, the istor HE 260 and

HE 325.

excel HE high-efficiency combination boiler

The Ideal excel HE high-efficiency combination boiler is a straightforward design based

on familiar technology, offering easy installation and servicing. A range of 3 models,

the excel HE 24, HE 28 and HE 32 ensures there is a product for every situation.

mini HE high-efficiency combination boiler

Simple and robust designs using familiar technology providing easy installation

and servicing. A choice of three combination boilers, mini HE C24, HE C28 and

HE C32. These are all available in both natural gas and propane versions.

esprit HE high-efficiency combination boiler

A high specification range of three models 24, 30 & 35kW with flow rates to suit most

customers. Designed for ease of installation and use coupled with quality

components and build. The Esprit has built in as standard, many components

normally considered options and all with a 2 year warranty. A full range of controls

including RF programmable thermostats completes this outstanding range. For more

information on this product see the Ideal Esprit Brochure, you can download from

www.idealboilers.com

The boilers featured in this brochure cover applications where a combination boiler

is required, or for greater DHW requirements the istor HE will fulfil all demands.

Product solutions

for every system

Central Heating &

Unvented Storage System

Combination Boiler System

SEDBUK rating

Each of Ideal's HE combination and system storage boilers contains only those parts

that are necessary to deliver dependability and performance, or that make the

product easier to fit, operate or install. As a result, they all offer exceptional levels

of reliability and are easily maintained and serviced.

Common components

The isar HE and istor HE appliances share a wide number of common parts

making them easier to install, service, and maintain. These items include

components such as the gas valve, burner, venturi, fan, fluing system and controls.

Easy siting

All Ideal HE appliances are available with a wide range of flue options. These make

siting the boiler in the property easier as long flues can be used. It also makes

positioning the flue terminal easier.

Simple to fit and service

Because they have so much in common, fewer spares are required to maintain the

range of boilers.

All products are `self-adjusting' (other than the Ideal istor HE). This allows the installer

to fit the products without the need to make any alterations. The boilers, being fully

modulating, adjust themselves to the required output to meet the heating load.

Unprecedented reliability

We have introduced new test procedures which are comprised of a demanding series

of application tests to ensure that the boiler is fault-free.

We have never been tougher on ourselves or our products, and you will find that it

shows in the new standards of reliability which these products have attained.

product features

PRODUCT FEATURES

isar HE

istor HE

excel HE

mini HE

combination

system store

combination

Diagnostic display

Kitchen cupboard fit*

n/a

No compartment ventilation required

Telescopic B pack flue

n/a

Optional programmer

Std.

Syphon kit available

n/a

Boiler stand-off kit

n/a

Remotely mountable user controls
(optional kit required)

n/a

*Note: When stand-off brackets are fitted, standard kitchen cupboard fit does not apply.

To comply with Part L of the Building Regulations 2005, Building (Scotland)

Regulations Section 6 or Northern Ireland Building Regulations Part F domestic

boilers are required to meet minimum SEDBUK ratings of 86%.

SEDBUK - Seasonal Efficiency of Domestic Boilers in the UK

The SEDBUK efficiency of a domestic boiler is an approved method of representing

the energy efficiency of a boiler under assumed typical operating conditions.

A boiler's efficiency is calculated using the SEDBUK rating (Seasonal Efficiency of

Domestic Boilers in the UK). This rating defines the average annual efficiency of a

domestic boiler achieved in typical domestic conditions, making reasonable

assumptions about pattern of usage, climate, control and other influences. SEDBUK

efficiencies are banded A-G (with A being the highest). The Ideal products isar HE

and istor HE are SEDBUK A rating approved with energy ratings over 90%. They are

all Energy Efficiency List recommended. The excel HE and mini HE ranges are

SEDBUK B rated with an efficiency greater than 86%.

These high-efficiency boiler ranges meet the requirements of the Building

Regulations 2005.

Ideal Boilers Ltd hereby declare that the boilers listed below meet the essential requirements for heating plant as described in:

Building Regulations - Part L1 2005, Building Standards (Scotland) Regulations - Section 6.

Band

SEDBUK range

Above 90%

86% 90%

82% 86%

78% 82%

74% 78%

70% 74%

Below 70%

building regulation compliance

Boiler

Range

Certificate No.

Notified body

Reference

istor HE

260/325

EC-87/04/034/M2

Advantica

0087

isar HE

24 - 35kW

EC-87/04/034/M2

Advantica

0087

excel HE

24 - 32kW

BP46

Advantica

0087

mini HE

24 - 32kW

BP0384

Gastec

0694

DETAILS OF COMPLIANCE

Application and usage

The isar HE benefits from being highly versatile and is perfectly suited to homes

where space is at a premium. This is enhanced by a standard telescopic flue and

twin-pipe fluing that gives excellent siting flexibility. The boiler is capable of meeting

the heating requirements for the majority of housing needs. Condensate drainage can

be overcome using the Ideal condensate pump kit.

The isar HE in operation

The isar HE is an automatically controlled, fanned flue high-efficiency boiler. The

boiler modulates its heat output to suit the demands of the heating load. It

incorporates a variable thermostat for CH temperature control, adjustable from 30ºC

to 82ºC. The use of a pre-mix burner allows control of gas input to the appliance

to be directly linked to fan speed. So, as the fan reduces speed to match heating

load, the gas valve maintains the correct proportional flow ensuring a high boiler

efficiency throughout its output range. The boiler incorporates all the necessary safety

features required to fit directly onto a sealed system. The isar HE also provides DHW

on demand via a high-efficiency secondary heat exchanger within the boiler casing.

The boiler's ability to modulate enables a stable DHW temperature to be obtained,

regardless of flow rate. An optional 7 day programmer with digital display enhances

the isar boiler range. With up to 3 periods per day, inbuilt default programmes and

battery back-up, this provides a simple economic means of system control.

The Ideal isar HE combination boiler

Excellent performance, reliability and ease of installation are trademarks of the

Ideal combination boiler. With its minimal components and slimline construction

the unit can be sited almost anywhere even in a standard kitchen cupboard, with

no additional compartment ventilation required. Other qualities such as a self-

adjusting feature for easy set up and an alpha-numeric diagnostic readout giving

coded appliance status, make this the most advanced combi boiler Ideal has ever

produced. In addition, its excellent performance and efficiency enables the

homeowner to save up to a third on gas bills.

isar HE

Combination Boiler System

isar HE

24-25

16-23

Please note: high level flue kit information is on pages 50-51

10-11

Optional programmer

Pictures are representational of installations but always check with your installer for guidance on pipework etc.

Cast aluminium-silicon
alloy heat exchanger
ensures tough,
dependable construction
and performance.

Built-in condensate
`S' trap with simple
connection makes
installation even easier.

Fully modulating product
with outputs from 8.8 to
24 kW to CH (30,000 to
80,000 Btu/h) suitable for
a wider range of
applications, and ensures
maximum efficiency
throughout the boiler's
modulation range.

Manifolds that house the
pump, pressure relief
valve, diverter valve,
thermostat and plate
heat exchanger mean
fewer connections
between boiler
components, improving
reliability and helping to
reduce overall product
weight.

Alpha-numeric diagnostic
readout gives essential,
easy-to-read operation
indicators and shows
boiler status together
with fault codes, in the
unlikely event of
a problem.

Low lift weight
of 43 kg offers easy
installation.

Compact dimensions of
height 687mm, width
397mm and depth
290 mm and no
compartment ventilation
required, ensure kitchen
cupboard fit and provide
siting flexibility.

`Self-adjusting' feature
reduces time and cost of
installation, and makes
installation much
simpler.

Hinged control PCB box
with easy access to
connections for
simplified servicing and
installation.

Optional programmer
Digital display with 7 day
programming offering 3 periods/day.
Optional remote mounting capability.

`Downward firing'
pre-mix burner
for greater reliability,
ensuring lower Nitrogen
Oxide emissions
(environmentally friendly).

Easy-to-wire mains
electrical connection
makes installation easier.

Fully modulating DHW outputs
giving flow rates of 9.6, 12 and
14.4 l/min at 35ºC temperature
rise.

isar HE-technical data

PERFORMANCE DATA

The Ideal isar HE combination boiler

Installation tips

Ideal recommend that a minimum

heating load of 3,000 Btu/h be

controlled using a room thermostat,

leaving all other rooms capable of being

controlled by TRVs.

The boiler has a cast aluminium-silicon

alloy heat exchanger, therefore suitable

water treatment should be applied to

the system.

These boilers require a permanent live

electrical supply.

A DHW flow restrictor is incorporated

within the boiler, automatically

controlling the DHW flow. This

eliminates the requirement for any

installer adjustments.

Siting options

Loft

Utility Room

Optional remotely mountable user

controls, compact dimensions and a

highly flexible fluing system allow the

isar HE to be easily sited.

Model

isar HE 24

isar HE 30

isar HE 35

Output

DHW

8.8 - 23.4

8.8 - 29.3

8.8 - 35.2

Btu/h

30,000 - 80,000

30,000 - 100,000

30,000 - 120,000

Flow Rate

l/min

9.6

12.0

14.4

8.8 - 23.4

Btu/h

30,000 - 80,000

SEDBUK rating

NOX Class

INSTALLATION DATA

CLEARANCE DATA

The following clearances are required for installation, servicing and replacement of parts.
Front of boiler

Sides of boiler

Top of boiler

Bottom of boiler

450 mm

5 mm

165 mm**

100 mm

Minimum clearance required at bottom of boiler for servicing is 100 mm, additional clearance will be
required for installation, depending upon site conditions.
**More clearance required when fitting fluing to the side.

PIPEWORK CONNECTIONS AND PRODUCT DIMENSIONS

Flue pluming is a by-
product of efficiency.
Please be aware of
terminal positions to
avoid complaints (see
pages 16-23,
fluing options).

Note: This appliance is not suitable for external installation. The wall on which the boiler is being mounted
must be able to support its total weight. The wall will not require special protection, but if the unit is being
fitted in a timber-frame building the guidelines set out in IGE/UP/7:1998 should be observed.

Fascia can be removed for cupboard installations. Width: 390mm, depth: 278mm. *Add 32 mm with stand off brackets fitted

This product has an

energy rating of A

on a scale of A-G.

For more information see

www.sedbuk.com

SEDBUK rating

Gas supply connection

inches

(

" BSP female)

CH flow connection

22 compression*

CH return connection

22 compression*

Pressure relief valve

inches

(

" BSP female)

Expansion vessel volume

litres

Condensate drain

21.5

Electrical supply

V/Hz

230/50

DHW inlet connection

15 compression

DHW outlet connection

15 compression

Power consumption

148 (isar HE 35 152w)

Fuse rating

Water content

litres

Maximum lift weight

Total packed weight

Flue terminal diameter

100

S trap depth

*For outputs exceeding 18 kW (60,000 Btu/h), 28 mm primary pipework will be required.

For full technical details please refer to the Installation and Servicing Instructions provided with the product.

istor HE

Central Heating &

Unvented Storage System

Naturally they are designed for fast and easy installation, whilst good accessibility
minimises service and maintenance. Space is freed up in the property due to their
compact design, whilst the householder also benefits by having an appliance capable of
giving mains pressure hot water from more than one outlet simultaneously. The choice of
two models provides these benefits for larger properties.
The many flue options available with the Ideal high-efficiency ranges allow more siting
options for this flexible product.

Application and usage

The istor HE offers tremendous flexibility in where it can be sited, freeing kitchen space if
installed in the airing cupboard for example. That type of siting is made easier by 100mm
concentric or a choice of 80mm and 60mm diameter twin-duct flue systems. More
awkward installations can now be handled with the optional condensate drain pump kit.
Rapid installation is assisted by thoughtful features such as a pre-piping frame, allowing
pipework to be made before fitting the unit. The water controls are all supplied inbuilt
requiring no extra space or time. Further ensuring that the istor HE is a truly complete
unit, a programmer and immersion heater all come fitted as standard.

The istor HE in operation

The units are automatically controlled with a fanned flue and no cupboard ventilation is
required. High-efficiency in operation is always maintained as the boiler modulates to
match the load applied.

Central heating

The boiler will fire to meet the heating requirements of the house as a normal system.

Domestic hot water

The cylinder contents (80 or 120) litres are immediately available for use and are blended
by the integral thermostatic mixing valve (settings 30-65ºC) to suit the householder. The
boiler will fire to replenish the cylinder or for a few seconds to maintain temperature.

Even after the full contents have been used, hot water is still available at reduced rate.
The cylinder is rapidly replenished as soon as DHW draw stops via the high recovery
cylinder coil.

The Ideal istor HE system store boiler

The istor HE system storage units take the provision of both central heating and
plentiful supplies of hot water to a new level. This is achieved by combining a
high-efficiency boiler and unvented cylinder in one unit with all necessary
controls. That also means a dry loft for simplicity and peace of mind.

istor HE

24-25

16-23

Please note: high level flue kit information is on pages 50-51

14-15

Pictures are representational of installations but always check with your installer for guidance on pipework etc.

Note: A pressure reducing valve (including filter)
is supplied for fitting externally to the appliance.

CH pressure gauge user
accessible pressure
gauge to monitor
system pressure.

Programmer 2 channel
programmer as standard
for independent selection of
CH & DHW on/off times.

Pressure relief valves for
cylinder protection.

Thermostatic mixer valve
controls DHW outlet
temperature. User adjustable
between 30 - 65ºC.

Heat engine based on the
fully modulating icos HE
boiler with outputs to CH
from 8.8 to 24 kW (30,000
to 80,000 Btu/h).

CH filling loop pre-fitted
filling loop to fill CH
circuit.

Fluing multi choice flue
variants for a wide range
of applications.

Installation Supplied as 2
separate module packages
for ease of handling and
installation.

DHW expansion vessel 19
litre vessel incorporated
within the appliance for
cylinder protection.

Pump & auto air vent
siting of pump and
automatic air vent
provide trouble free
filling of system.

Diverter valve
3 way diverter valve
operating with DHW
priority to maximise hot
water supply.

Alpha-numeric diagnostic
readout gives essential
easy to read operation
indicators and fault codes
in the unlikely event of a
problem.

CH expansion vessel
8 litre vessel for sealed
system CH incorporated
within the appliance.

Pre-piping frame
all service connections
can be made prior to
appliance installation.

istor HE technical data

PERFORMANCE DATA

INSTALLATION DATA

Model

istor HE 260

istor HE 325

Gas supply connection

inches

CH flow connection

22*

CH return connection

22*

Pressure relief valve

CH Expansion vessel volume

litres

Condensate drain

21.5

DHW inlet connection

DHW outlet connection

DHW delivery temperature

ºC

30 - 65

Water content

litres

Water content

DHW

litres

120

Electrical supply

V/Hz

230/50

Power consumption

148

Fuse rating

Maximum lift weight

Boiler

Maximum lift weight

Cylinder

Total packed weight

Boiler

58.5

Total packed weight

Cylinder

Flue terminal diameter

Concentric

100

Twin duct

80 or 60

*For outputs exceeding 18 kW (60,000 Btu/h), 28 mm primary pipework will be required.

CLEARANCE DATA

The following clearances are required for installation, servicing and replacement of parts.

Front of boiler

Sides of boiler

Top of boiler

450 mm

5 mm

165 mm**

**More clearance required when fitting flue to the side.

PIPEWORK
CONNECTIONS
AND PRODUCT
DIMENSIONS

Flue pluming is a
by-product of
efficiency. Please be
aware of terminal
positions to avoid
complaints (see
pages 16-23,
fluing options).

Note: This appliance is not suitable
for external installation.

Model

istor HE 260

istor HE 325

Output

DHW

8.8 - 29.3

Btu/h

30,000 - 100,000

Flow Rate

l/min*

8.8 - 23.4

Btu/h

30,000 - 80,000

Recovery times**

mins

SEDBUK rating

NOX Class

*Practical maximum with suitable mains supply **Recovery times are after 70% draw off, from 15ºC

The Ideal istor HE system store boiler

Installation tips

Ideal recommend that a minimum

heating load of 3,000 Btu/h be

controlled using a room thermostat,

leaving all other rooms capable of being

controlled by TRVs.

The boiler has a cast aluminium-silicon

alloy heat exchanger, therefore suitable

water treatment should be applied to

the system.

These boilers require a permanent live

electrical supply.

Siting options

Loft

Utility Room

Compact dimensions and a highly

flexible fluing system allow the istor HE

to be easily sited.

This product has an

energy rating of A

on a scale of A-G.

For more information see

www.sedbuk.com

SEDBUK rating

For full technical details please refer to the Installation and Servicing Instructions provided with the product.

10 15 20

25 30

35 40

50 55

AIR PIPE LENGTH (m)

L
U

I
P

L
E

(
m

)

8
7
1
1

Note. Dotted line is example - see Frame 4

IMPORTANT.

Flue and air pipe length combinations

must be within the red area.

FIG. 1 Air and flue length combination graph

80 mm twin flue system

AIR PIPE LENGTH (m)

F
L
U

I
P

L
E

T
H

(
m

)

8
7
1
4

IMPORTANT. Flue and air pipe length

combinations must be within the red area.

Note. Dotted line is example - see Frame 3

FIG. 2 Air and flue length combination graph

60 mm twin flue system

Twin-pipe systems

fluing options

The HE combination range from Ideal

boilers benefits from a wide variety of

fluing options, making it possible for

the installer to fit each unit safely and

unobtrusively in almost any situation.

The following information sets out the

alternatives that are available and

demonstrates the siting flexibility that

is an inherent part of all our boilers.

The Ideal HE combination range comes

with a choice of concentric or twin-

pipe fluing options.

Twin-pipe fluing

Various twin-pipe options are available,

in both 80 mm and 60 mm diameters,

to assist in the termination of the flue

where the boiler is installed in a location

remote to an outside wall. These

options allow for separation of the air

supply from the pipe that discharges

the flue gases. All twin pipe flue

installations must be fitted with the

condensate drain trap supplied.

80 mm twin-pipe system

The maximum combined flue length

is 60 metres. The following graph

(FIG. 1) demonstrates the allowable

lengths for the air supply and flue gas

pipes. This system can be used for

both horizontal and vertical

applications.

60 mm twin-pipe system

The maximum combined flue length

is 18 metres. The following graph

(FIG. 2) demonstrates the allowable

lengths for the air supply and flue

gas pipes. This system can be

used for horizontal applications only.

Concentric flue systems

Maximum flue lengths:-

isar HE 24, 30

6 m

7.5 m

22 m

isar HE 35

3 m

7.5m

22 m

istor HE

6 m

7.5 m

22 m

*Each 90° elbow used is at the expense of 1000 mm of straight flue run, and each 45° elbow is
used at the expense of 600 mm of straight flue run.

Typical combined primary and secondary length. See installation instructions for more details.

Note: The flue deflector kit is used at the expense of 1000mm of straight flue run.

I
Z

I
C

High level flue outlet kit

The plume of vapour at a high efficiency flue terminal can be a nuisance in some

installations. A range of solutions to provide a high level flue terminal out of normal

view are available. See pages 50 and 51 for information.

Minimum dimensions of flue terminal
positions

KEY TO ILLUSTRATION

Terminal Position

Fan Models
Min. Spacing

Directly below an openable
window or other opening
e.g. air brick

300 mm

Below gutters, drain pipes
or soil pipes

25 mm*

BS5440-1 2000 75mm

Below eaves

25 mm*

BS5440-1 2000 200mm

Below balconies or car
port roof

25 mm*

BS5440-1 2000 200mm

From vertical drain pipes
or soil pipes

25 mm*

BS5440-1 2000 150mm

From an internal or external
corner or to a boundary
alongside the terminal

25mm*

BS5440-1 2000 300mm

Above ground, roof
or balcony level

300 mm

From a surface or a
boundary facing a terminal

600 mm

From a terminal
facing a terminal

1200 mm

From an opening in a
car port into a dwelling

1200 mm

Vertically from a terminal
on the same wall

1500 mm

Horizontally from a
terminal on the same wall

300 mm

Vertical flues

Above a pitched or flat roof
(to base of terminal)

300 mm

From single wall face

(Flat roof)

600 mm

(Pitched roof)

1000 mm

From corner wall faces

1000 mm

Table corresponds to BS5440: Part 1 : 2000

*Note: Only one reduction down to 25mm is allowable
per installation otherwise BS5440-1 2000 dimensions
must be followed.
It must always be borne in mind that the HE range flues
plume and that special consideration should be given to
terminal position.

Concentric Flue Kits

Part No.

Telescopic B Pack Flue

203164

Horizontal flue terminal (600mm long)

203128

Flue extension kit 60/100 mm (Pack D: 1000 mm long)

203129

Roof flue kit

203132

Powered vertical flue kit

203136

45° Elbow kit 60/100 mm diameter (pair)

203131

Universal weather collar 100 mm diameter

152258

Flat roof weather collar 100 mm diameter

152259

Flue extension pipe 1m x 80mm diameter (pair)

203142

Powered vertical flue terminal

203134

90° Flue elbow kit 60/100 mm

203130

Flue finishing kit

155988

Vertical connector

203135

Flue deflector kit

203137

80 mm Twin-pipe System

Part No.

Twin-pipe extension kit 0.5m x 80mm diameter

203157

Twin-pipe extension pipe 1m x 80mm diameter (pair)