Main Heating boilers Range Guide RANGE GUIDE

MAIN HEATING RANGE GUIDE

Combi and system boilers and cylinders.

At Main, we only oer products and
services that are straightforward, eective,
ecient – and don’t break the bank.

That means a wide range of reliable,
easy-to-install, low maintenance boilers,
cylinders and water heaters – as well as a
range of heating controls that save your
customers even more money. On top of all
that, Main training and support services are
there to oer help when you want it.

It’s everything you need.

2

Our heritage

We’ve been designing and building boilers in the UK for more than 75 years, working to the highest

standards and ensuring the highest quality.

It’s given us a proud reputation for excellence in our industry – a reputation that’s strengthened

with each outstandingly reliable boiler, cylinder or water heater we develop.

It all means that when you install Main, you install a product you can depend on to get the job done.

Our range

Of course, we don’t just oer boilers and accessories, we also have a range of unventedhot water

cylinders and water heaters to complement them. You’ll find all the details you need onall our

products in this easy-to-understand brochure – including technical specifications and flue options.

Our service

To make it easier for you to get the job done, we oer FREE training courses and technical

support,soyou’ll always have the very latest Main product knowledge. And because our dedicated

training centres are spread across the UK, you’ll always be within easy reach, wherever you are.

Although our products are easy to install and simple to maintain, sometimes you just need a bit

of help and advice. That’s why we also have Baxi Customer Support – our service division with

a dedicated service centre and field engineers.

You can reach them on 0344 871 1545.

Our heritage

We’ve been designing and building boilers in the UK for more than 75 years, working to the

highest standards and ensuring the highest quality.

It’s given us a proud reputation for excellence in our industry – a reputation that’s strengthened

with each outstandingly reliable boiler, cylinder or water heater we develop.

It all means that when you install Main, you install a product you can depend on to get the job done.

3

You asked for it...

20%

Hydrogen

25 and 30kW

29.5kg lift weight

Compact cupboard fit

Front access to all
components

Central top flue

Brass hydraulics block

Optional stand-o frame

Certified to work with
20% hydrogen

Key features Benefits

5 Year Warranty

Outputs 25kW and 30kW To suit most property sizes

Compact cupboard fit Can be installed discreetly

Lightweight 29.5kg lift weight

Front access to all components Saves time when servicing, allowing for ease of maintenance and repair

Fully modulating and highly ecient Boiler intelligently uses the right amount of fuel to meet the set

Central top flue For ease of replacement

Flueing options of up to 20m Allowing greater flexibility of siting

Optional outdoor weather sensor available Enhances system control and customer comfort

Ease of service No special tools or replacement seals required for standard service

Vertical packaging easy to transport and
unpack

Clean aesthetic finish Boiler casing hides system connections for cleaner finish

Opentherm interface Compatible with Baxi uSense wired thermostat

Rigid filling link For a neater finish

4

†

For peace of mind

central heating temperatures, saving money on fuel bills

Allows for ease of access to all installation accessories from top of the packaging

Main Eco

Compact Combi

We designed the Main Eco Compact Combi after
talking to installers across the UK to find out
what they want from a combi boiler.

In addition to Main Heating’s tried and tested
technology, this boiler is cupboard-fit, lightweight,
compatible with Baxi uSense wired smart
thermostat and has a five year warranty

Compatible accessories

†

.

7649277

Baxi uSense wired
smart thermostat

720030701

MAIN RF digital
7-day programmable
roomstat

†

Subject to registration and an annual service. Terms and conditions apply. Visit baxi.co.uk/warranty

7683084

Baxi IFOS In Flue
Outdoor Sensor Kit

7703233

On wall
outdoor sensor

720971601

Baxi wired room
thermostat

5

MAIN ECO COMPACT COMBI

Technical specifications

Dimensions and minimum clearances

Boiler dimensions

Width [A] Height [B] Depth [C]

390mm 700mm 285mm

Service clearances

A

DD

E

B

Side [D] Upper [E] Lower [F] Front [G]

5mm* 178mm* 200mm* 5mm*
in operation

*450mm for servicing

Included with the Main Eco Compact Combi

Wall mounted bracket

G

Literature and fitting pack

F

Copper pipe tails

C

Rigid
filling link

6

Main Eco Compact

Main Eco Compact Combi Units

Sales code (boiler only) 77 14519 77 14161

Combi 25kW

Main Eco Compact

Combi 30kW

Controls and accessories

Reset button Yes Yes

User adjustable DHW temperature Yes Yes

User adjustable CH temperature Yes Yes

LED temp/status/fault diagnosis display Yes Yes

Integral 24hr electro-mechanical timer (optional 720971401) No No

Gas

Natural gas Yes Yes

Nominal inlet supply pressure mbar 20 20

Maximum gas rate m3/h 2.71 3.26

Propane LPG No No

Heat input central heating (CH)

Heat output CH non-condensing

Heat output CH condensing

Heat input domestic hot water kW Max Gross (QnwHs) 25.77 30.00

Heat output domes tic hot water kW Max (Pn) 25.00 30.93

kW Max Gross(QnHs)

kW Min Gross(QnHs)

kW Max (Pn)

kW min (P n)

kW max (Pnc)

kW min (P nc)

22.86

6.87

20.00

6.20

21.16

6.70

22.86

6.87

20.00

6.20

21.20

6.70

ErP product information

NOx class 6 6

Space heating eciency class A A

Water heating declared load profile XL XL

Water heating eciency class A A

Seasonal space heating energy eciency % 93 93

Electrical

Electrical supply Volts/Hz 230/50 230/50

Permanent live required Yes Yes

Fitted electrical cable No No

Power consumption Watts 68 68

External fuse rating Amps 3 3

Internal fuse rating Amps F2AH250V F2AH250V

Ingress protection rating IPX5D IPX5D

Integral ‘boiler only’ frost thermostat Yes Yes

Mechanical

Stand o frame – optional (7715535)

Pre-plumbing/wall mounting jig – optional (7715591)

Isolating valves

Gas supply connection

Central heating connections

Domestic hot water connections

Condensate drain connection

Safety discharge connection

Safety discharge pressure

Temporary rigid filling loop included

mm 22 22

mm 22 22

mm 15 15

mm 21.50 21.50

mm 15 15

bar 3 3

Yes Yes

Yes Yes

Yes Yes

Yes Yes

Hydraulic

Domes tic hot water output (raised 35°C) (max)

Domes tic hot water operating flow rate (min)

Domestic hot water operating pressure (min) bar 0.5 0.5

Domes tic hot water system pressure (max) bar 8 8

CH safety discharge p ressure bar 3 3

Integral automatic bypass Yes Yes

Integral expansion vessel capacity litres 7 7

Max capacity of central heating sy stem litres 100 10 0

Compartment ventilation requirement No No

CH system inhibitor required Yes Yes

24 hour pump exercise Yes Yes

Pump overrun Yes Yes

l/min 10.2 12.2

l/min 2* 2*

Concentric flue systems

Concentric flue diameters mm 60/100 and 80/125

Standard horizontal flue kit length (60/100mm) mm 685 685

Max equiv length horizontal/vertical (60/100mm) m 10 10

Max equiv length horizontal/vertical (80/125mm) m 20 20

Equivalent length per 135º bend m 0.50 0.50

Equivalent length per 93º bend m 1.00 1.00

Weights

Max installation lift weight kg 29 29

Gross packaged boiler weight kg 32 32

* W here low flow tap s or fittings a re intended to b e used in the DH W system conne cted it is stro ngly recomm ended that t he DHW flow rate DO ES NOT fall belo w 2.5 l/min.

This wi ll ensure relia ble operati on of DHW func tion

7

MAIN ECO COMPACT COMBI

Electrical Power

Terminal

Pressure Gauge

What’s inside?

Drip Tr ay

Expansion vessel

top up valve

Overheat
Thermostat Sensor

Burner Mixing
Chamber

Stainless Steel
Heat Exchanger

Fan

Flue

Combustion

Checking Points

Ignition and

Flame Sensing

Electrode

Air Inlet
Silencer

Expansion

Vessel

8

Water Pressure
Sensor

Pump

Brass Hydraulic

Gas Valve

Condensate Drain

Electrical Power
Terminal

Pressure Gauge

Flue solutions

Horizontal concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Horizontal telescopic flue inc. low profile elbow

1

and fixing screws

Horizontal telescopic flue inc. low profile elbow

2

and fixing screws

3 1m flue ex tension inc. fixing screws White 1000mm 100mm 720648801

4 93° flue bend inc. fixing screws White 93° 100mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 100mm 720647901

Standard horizontal flue inc. low profile elbow

6

and fixing screws

White pipe/white

terminal

White pipe/black

terminal

White pipe/black

terminal

315mm – 500mm 100mm 720599401

315mm – 500mm 100mm 720598701

685mm 100m m 7222019

Plume displacement kits Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Plume d isplacement ter minal kit for tel escopic flue

7

inc. 1m e xtension and b rackets

Plume d isplacement ter minal kit for tel escopic flue

8

inc. 1m e xtension and b rackets

9 Plume displacement kit extension and brackets White 1000mm 60mm 720 6434 01

Plume displacement terminal kit i nc. 1m extensio n

10

and brackets

Plume displacement terminal kit i nc. 1m extensio n

11

and brackets

White 60mm 720627001

Black 60mm 720622901

White 60mm 7225717

Black 60mm 7225716

Key and OD
dimensions

Key and OD
dimensions

Sales code

Sales code

Vertical concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

12 Vertical flue terminal Black 100m m 5118576

3 1m flue extension inc. fixing screws White 1000mm 10 0mm 720648801

4 93° flue bend inc. fixing screws White 93° 100 mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 10 0mm 720647901

7

1

4

5

(x2)

2

6

3

12

9

8

Key and OD
dimensions

10

Sales code

11

9

You asked for it...

15 and 18kW

28kg lift weight

Compact cupboard fit

Front access to all
components

Central top flue

Optional stand-o frame

10

Key features Benefits

5 Year Warranty

Outputs 15kW and 18kW To suit most property sizes

Compact cupboard fit Can be installed discreetly

Lightweight 28kg lift weight

Front access to all components Saves time when servicing, allowing for ease of maintenance and repair

Fully modulating and highly ecient Boiler intelligently uses the right amount of fuel to meet the set

Central top flue For ease of replacement

Flueing options of up to 20m Allowing greater flexibility of siting

Ease of service No special tools or replacement seals required for standard service

Vertical packaging Easy to transport and unpack

Clean aesthetic finish Boiler casing hides system connections for cleaner finish

†

For peace of mind

central heating temperatures, saving money on fuel bills

Main Eco

Compact System

The new cupboard fit Main Eco Compact System
boiler is the perfect choice for homes with more
than one bathroom, to satisfy all its hot water needs.

It is easy to install and service, with front access to all
components and central top flue, while its five year
warranty, good looks and simple controls make it
the perfect choice for householders.

Compatible accessories

7649277

720644801

Baxi uSense wired

Baxi programmable

smart thermostat

7-day wireless sensor
(2 channel)

†

Subject to registration and an annual service. Terms and conditions apply. Visit baxi.co.uk/warranty

720971601

Baxi wired room
thermostat

11

MAIN ECO COMPACT SYSTEM

Technical specifications

Dimensions and minimum clearances

Boiler dimensions

Width [A] Height [B] Depth [C]

390mm 700mm 285mm

Service clearances

A

DD

E

B

Side [D] Upper [E] Lower [F] Front [G]

5mm* 178mm* 200mm* 5mm*

*450mm for servicing

Included with the Main Eco Compact System

Bracket

G

Literature and fitting pack

F

Copper pipe tails

C

12

Main Eco Compact

Main Eco Compact System Units

Sales code (boiler only) 7714 605 7714 606

System 15kW

Main Eco Compact

System 18kW

Controls

Reset switch Yes Yes

User adjustable CH temperature Yes Yes

LED operating status display Yes Yes

Gas

Natural Gas Yes Ye s

Nominal inlet supply pressure mbar 20 20

Maximum gas rate m3/hr 1.64 1.96

Heat input central heating (CH)

Heat output CH non-condensing

Heat output CH condensing

kW max gross (QnHs)

kW max (Pn)

kW min gross (QnHs)

kW min (P n)

kW max (Pnc)

kW min (P nc)

17. 16

5.15

15.00

4.50

16.2

4.9

20.60

5.15

18.00

4.50

19.4

4.9

ErP product information

NOx class 6 6

Sound power level, indoors L

Space heating eciency class A A

dB 49 51

WA

Electrical

Electrical supply Volts/Hz 230/50 230/50

Permanent live required Yes Yes

Switched live Yes Yes

Power consumption Watts 46 56

External fuse rating Amps 3 3

Internal fuse rating F2HA250V F2HA250V

Boiler IP rating (electrical protection) Approval category IPX5D IPX5D

Integral ‘boiler only’ frost thermostat Yes Yes

Pump overrun Yes Yes

Mechanical

Temporary filling loop – optional (248221)

Wall mounting jig Yes Ye s

Isolating valves Yes Ye s

Gas supply connection mm 22 22

Central heating connections mm 22 22

Condensate drain connection mm 21.5 21.5

Safety discharge connection mm 15 15

Hydraulic

Safety discharge pressure bar 3 3

Integral automatic bypass Yes Yes

Integral expansio n vessel litres 7 7

Maximum capacit y of CH system litres 100 100

24hr pump exercise Yes Ye s

Pump overrun Yes Ye s

Concentric flue systems

Concentric flue diameter mm 60/100 and 80/ 125

Standard horizontal flue kit length (ø 60/100) mm 685 685

Maximum equivalent vertical length (ø 60/100) m 10 10

Maximum equivalent vertical length (ø 80/125) m 20 20

Equivalent length per 135° bend m 0.50 0.50

Equivalent length per 93° bend m 1 1

Weights

Gross packaged boiler weight kg 31.2 31.2

Maximum installation lift weight kg 28.06 28.06

13

MAIN ECO COMPACT SYSTEM

Electrical Power

Terminal

Pressure Gauge

What’s inside?

Overheat
Thermostat Sensor

Expansion vessel

top up valve

Flue

Burner Mixing
Chamber

Stainless Steel
Heat Exchanger

Fan

Water Pressure
Sensor

Combustion

Checking Points

Ignition and

Flame Sensing

Electrode

Air Inlet
Silencer

Expansion

Vessel

Pump

14

Condensate Drain

Electrical Power
Terminal

Gas Valve

Pressure Gauge

Flue solutions

Horizontal concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Horizontal telescopic flue inc. low profile elbow

1

and fixing screws

Horizontal telescopic flue inc. low profile elbow

2

and fixing screws

3 1m flue ex tension inc. fixing screws White 1000mm 100mm 720648801

4 93° flue bend inc. fixing screws White 93° 100mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 100mm 720647901

Standard horizontal flue inc. low profile elbow

6

and fixing screws

White pipe/white

terminal

White pipe/black

terminal

White pipe/black

terminal

315mm – 500mm 100mm 720599401

315mm – 500mm 100mm 720598701

685mm 100m m 7222019

Plume displacement kits Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Plume d isplacement ter minal kit for tel escopic flue

7

inc. 1m e xtension and b rackets

Plume d isplacement ter minal kit for tel escopic flue

8

inc. 1m e xtension and b rackets

9 Plume displacement kit extension and brackets White 1000mm 60mm 720 6434 01

Plume displacement terminal kit i nc. 1m extensio n

10

and brackets

Plume displacement terminal kit i nc. 1m extensio n

11

and brackets

White 60mm 720627001

Black 60mm 720622901

White 60mm 7225717

Black 60mm 7225716

Key and OD
dimensions

Key and OD
dimensions

Sales code

Sales code

Vertical concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

12 Vertical flue terminal Black 100m m 5118576

3 1m flue extension inc. fixing screws White 1000mm 10 0mm 720648801

4 93° flue bend inc. fixing screws White 93° 100 mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 10 0mm 720647901

7

1

4

5

(x2)

2

6

3

12

9

8

Key and OD
dimensions

10

Sales code

11

15

You asked for it...

15, 18 24, 30kW

O n ly 17.4 kg

*

Positive fix wall
mounting plate

Top central flue

No pump overrun

No permanent live

Front and side access

16

Key features Benefits

5 Year Warranty

Outputs 15kW, 18kW, 24kW and 30kW To suit most property sizes

Only 17.4kg installer lift weight* The lightest boiler available in the UK**

Compact cupboard fit Can be installed in a 290mm deep cupboard

Easy fit wall mounting bracket Robust with a positive fix and audible lock so you know it's secure

No pump overrun or permanent live required Saves time and money during installation, and less disruption for the householder

Front and side access Servicing is easier and quicker, and no special tools are required

Top central flue Easy replacement for existing boilers

Industry leading choice of flue lengths,
bends and accessories

*30kW is 19.5kg installer lift weight
**As at April 2019

†

For peace of mind

Extensive flue option up to 20 meters for versatile siting and easy replacement

Main Eco

Compact Heat

The lightweight Main Eco Compact Heat is small
enough to fit into a cupboard and is perfect for
replacing old, standard eciency boilers.

Compatible accessories

7649277

7212443

Baxi uSense wired

Twin channel wired

smart thermostat

programmer

720971601

Baxi wired room
thermostat

†

Subject to registration and an annual service. Terms and conditions apply. Visit baxi.co.uk/warranty

17

MAIN ECO COMPACT HEAT

Technical specifications

Dimensions and minimum clearances

Boiler dimensions

Width [A] Height [B] Depth [C]

370mm 625mm 270mm

Service clearances

A

DD

E

B

Side [D] Upper [E] Lower [F] Front [G]

5mm* 190mm* 120mm* 5mm*

*500mm for servicing

Included with the Main Eco Compact Heat

Top flue adapter

G

Literature and fitting packBracket

F

Power lead

Copper tail
(gas connection)
and fibre washer

C

18

Main Eco Compact

Main Eco Compact Heat Units

Sales code (boiler only) 7712025 7712026 7712028 7712029

Heat 15kW

Main Eco Compact

Heat 18kW

Main Eco Compact

Heat 24kW

Main Eco Compact

Heat 30kW

Controls and accessories

Operating mode selector switch with reset Yes Yes Yes Yes

User adjustable CH temperature

LED temp/status/ fault diagnosis display Yes Yes Yes Yes

Twin channel wired programmer

Wired room thermostat (optional accessory)

Range 45°C to 82°C

721 2443

720971601

Yes Yes Yes Yes

Optional Optional Optional Optional

Optional Optional Optional Optional

Gas

SAP 2009 Annual Eciency (PCDB/SEDBUK)

NOx class

1-5

%

89% 89% 89% 89%

5 5 5 5

ErP product information

NOx mg/kWh 20 21 24 24

Sound power level, indoors L

Space heating eciency class A A A A

Heat input central heating (CH)

Heat output CH (non-condensing)

Gas supply pipe size

Inlet supply pressure (natural gas) mbar 20 20 20 20

Maximum gas rate m3/hr 1.75 2.07 2.73 3.27

kW max gross (QnHs)

kW max (Pn)

dB 33 34 37 37

WA

kW min gross (QnHs)

kW min (P n)

mm

18.32

8.59

16

7.5

22 22 22 22

21.75

8.59

19

7.5

28.62

8.59

25

7.5

34.35

8.59

30

7.5

Mechanical and hydraulic

Compartment ventilation required No No No No

Flow/return pipe mm 22 22 22 22

Condensate discharge pipe connection mm 21.5 21.5 21.5 21.5

Electrical

Electrical supply Volts / Hz 230V / 50Hz 230V / 50Hz 230V / 50Hz 230V / 50Hz

Permanent live required No No No No

Power consumption Watts 20 23 33 44

External fuse rating Amps 3 3 3 3

Internal fuse rating 1.6T 1.6T 1.6T 1.6T

Boiler IP rating (electrical protection) Approval Category IPX4D IPX4D IPX4D IPX4D

Pump overrun No No No No

Concentric flue systems

Standard telescopic concentric flue mm 315-500 315-500 315-500 315-500

Horizontal concentric (60/100mm)

Max equivalent length (m) 6 6 6 6

Reduc tion Per 135º bend (m) 0.5 0.5 0.5 0.5

Reduc tion Per 93º ben d (m) 1 1 1 1

Horizontal concentric (80/125mm) m 12 12 12 12

Weights

Gross packaged boiler weight (Max)kg 19.5 19.5 19.5 21.5

Maximum installation lift weight kg 17.4 17. 4 17.4 19.5

19

MAIN ECO COMPACT HEAT

Slide out product I.D /

serial no. plate

Controls

Drain point

Integrated HMI

cover

What’s inside?

Flow and return pipes

Fan assembly

Spark electrode

Air inlet silencer

Condensate trap
(not visible)

Flue connection from the top

Pressure switch

Burner

PCB housing

Aluminium heat

exchanger

Gas Valve

Data cable

Drain point

Slide out product I.D /
serial no. plate

Controls

Integrated HMI

cover

20

Flue solutions

Horizontal concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Horizontal telescopic flue inc. low profile elbow

1

and fixing screws

Horizontal telescopic flue inc. low profile elbow

2

and fixing screws

3 1m flue ex tension inc. fixing screws White 1000mm 100mm 720648801

4 93° flue bend inc. fixing screws White 93° 100mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 100mm 720647901

Standard horizontal flue inc. low profile elbow

6

and fixing screws

White pipe/white

terminal

White pipe/black

terminal

White pipe/black

terminal

315mm – 500mm 100mm 720599401

315mm – 500mm 100mm 720598701

685mm 100m m 7222019

Plume displacement kits Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

Plume d isplacement ter minal kit for tel escopic flue

7

inc. 1m e xtension and b rackets

Plume d isplacement ter minal kit for tel escopic flue

8

inc. 1m e xtension and b rackets

9 Plume displacement kit extension and brackets White 1000mm 60mm 720 6434 01

Plume displacement terminal kit i nc. 1m extensio n

10

and brackets

Plume displacement terminal kit i nc. 1m extensio n

11

and brackets

White 60mm 720627001

Black 60mm 720622901

White 60mm 7225717

Black 60mm 7225716

Key and OD
dimensions

Key and OD
dimensions

Sales code

Sales code

Vertical concentric flues Ø 60/100mm

Multifit Flue Group A

9

Key and OD
dimensions

Sales code

10

11

Item Description (multifit) flue system Colour Specification

12 Vertical flue terminal Black 100m m 5118576

3 1m flue extension inc. fixing screws White 1000mm 10 0mm 720648801

4 93° flue bend inc. fixing screws White 93° 100 mm 720648401

5 135° flue ben d inc. fixing screws (pair) White 135° 10 0mm 720647901

7

1

4

5

(x2)

2

6

3

8

12

21

Flue solutions

Multifit flue kits now come with positive screw fixings for all connections and are available in a choice of lengths to reduce the
need for onsite cutting. By popular demand we oer a choice of colours for the terminals to match existing rainwater systems.

The options shown are only compatible with Main Heating Eco Elite Combi and System.

Maximum recommended flue lengths

Main Combi / System A (60/100 Concentric) G (80/125 Concentric)

Horizontal 10 20

Vertical 10 20

Horizontal concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

1 Horizontal telescopic flue inc. low profile elbow and fixing screws

2 Horizontal telescopic flue inc. low profile elbow and fixing screws

3 Horizontal telescopic flue inc. low profile elbow and fixing screws

4 Stan dard horizontal flue inc. low profile elbow and fixing screw s*

6 Flue terminal deflector White 60mm 72064 4201

7 Flue terminal deflector Black 60mm 5111068

8 Flue terminal deflector Brown 60mm 720644301

9 1m flu e extension inc. fixing screws White 1000mm 100mm 720648801

10 0.5m flue extension inc. fix ing screws White 500mm 100mm 720643001

11 0.25m flue extensio n inc. fixing screws White 250mm 100mm 720 643101

12 93° flue bend inc. fi xing screws White 93° 100mm 720648401

13 135° flue b end inc. fixing screws White 135° 100mm 720648501

14 135° flue bend inc. fixing screws (pair) White 135° 100mm 720647901

17 Stainless steel terminal guard – Ø 60/100 S/S Stainless steel 100mm 720627901

White pipe/
white terminal
White pipe/
black terminal
White pipe/
brown terminal
White pipe/
black terminal

315mm – 500mm 60/ 100mm 720599 401

315mm – 500mm 60/ 100mm 720598701

315mm – 500mm 60/ 100mm 720642701

685mm 100mm 7222019

Key and OD
dimensions

Sales code

22

Plume displacement kits Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

18 Plume displacement termin al kit inc. 1m extension and brackets White 60mm 7206270 01

19 Plume displacement kit extension and br ackets White 1000mm 60mm 7206 43401

20 Plume displacement kit bend White 93° 60mm 5121369

21 Plume displacement kit bend – pa ir White 135° 60mm 5121370

22 Plume displacement terminal kit inc. 1m ex tension and bra ckets Black 60mm 720622901

23 Plu me displacement kit extensi on and brackets Black 1000mm 60mm 720643301

24 Plume displacement kit bend Black 93° 60mm 720648701

25 Plume displacem ent kit bend – pair Black 135° 60mm 720648601

26 Plum e displacement terminal kit in c. 1m extension and brackets White 100mm 7225717

27 Plume displace ment terminal kit inc. 1m extension and brackets Black 100mm 7225716

28 Under balcony eaves flue kit White 135° 60mm 7211039

29 Under balcony eaves flue kit Black 135° 60mm 7211041

For information on reductions for the twin pipe flues please see the installation instructions.

Key and OD
dimensions

* Not compatible with items 16 and 20.

** Compatible wit h 1. *** Compatible with 22.

Sales code

Vertical concentric flues Ø 60/100mm

Multifit Flue Group A

Item Description (multifit) flue system Colour Specification

30 Vertical ridge flue terminal Brown 100mm 7 20647101

31 Vertical flue terminal Black 10 0mm 5118576

32 Roof cover plate 125mm 246 143

9 1m flu e extension inc. fixing screws White 1000mm 100mm 720648801

10 0.5m flue extension inc. fix ing screws White 500mm 100mm 720643001

11 0.25m flue extensio n inc. fixing screws White 250mm 100mm 720 643101

12 93° flue bend inc. fi xing screws White 93° 100mm 720648401

13 135° flue b end inc. fixing screws White 135° 100mm 720648501

14 135° flu e bend (pair) in c. fixing screws White 135° 100mm 720647901

33 Pitched roof flashing 25°/ 50° 125mm 5122151

34 Flat roof flashing 125mm 246 144

9

10

11 12

4

1

2

3

Key and OD
dimensions

Sales code

6

20 24

182822

13

14

32

(x2)

(x2)

25

17

30

7

8

19 23

262127

29

33

31

34

23

Flue solutions

Horizontal concentric flues Ø 80/125mm

Multifit Flue Group G

Item Description (multifit) flue system Colour Specification

35 Horizontal flue inc. boiler and terminal adaptors Black 125mm 511858 0

36 1m flue exten sion White 1000mm 125mm 51185 84

37 Flue bend White 91.5° 125mm 5118588

38 Flue bend ( pair) White 135° 125mm 5118597

39 Pipe support bracket White 125mm flue pipes 125mm 5118610

Vertical concentric flues Ø 80/125mm

Multifit Flue Group G

Item Description (multifit) flue system Colour Specification

40 Vertical flue terminal Black 125mm 5111078

36 1m flue exten sion White 1000mm 125mm 51185 84

37 Flue bend White 91.5° 125mm 5118588

38 Flue bend ( pair) White 135° 125mm 5118597

41 Flue vertical adaptor White 100/125mm 5111070

33 Pitched roof flashing 25°/55° 125mm 5122151

35 Flat roof flashing 125mm 246144

39 Pipe support brackets White 125mm flue pipes 125mm 5118610

Key and OD
dimensions

Key and OD
dimensions

Sales code

Sales code

39

35 36 37

38

(x2)

41

The options shown are only compatible with Main Heating Eco Elite Combi and System.

24

N

I

I

G

F

M

I

A

A

F

H

J,K

D
E

H

C

R

A

I

J,K

I

L

S

B

T

U

Likely flue positions requiring
a flue terminal guard

Terminal position with minimum distance (mm)

A1 Directly below an opening, air brick, opening windows etc 300

1

B

Ab ove an opening , air brick, op ening window etc 300

1

C

Horizontally to an opening, air brick, opening window etc 300

2

D

Below gutters, s oil pipes or drain pipes 25

2

E

Below eaves 25

2

F

Below balconies or c ar port roof 25

2

G

Fro m a vertical drain pipe or soil pipe 25

2

H

From an internal or external corner 25
I Above ground, roof or balcony level 300
J From a surf ace or boundar y line facing a ter minal 600
K From a terminal facing a terminal (Horizontal flue) 1200
K From a terminal facing a terminal ( Ver tical flue) 600
L Fro m an opening in a ca rport (e.g. door, window) into th e dwelling 1200
M Vertically from a terminal on the s ame wall 1500
N Horizontally from a terminal on th e same wall 300
R From adjacent wall to flue (vertical only) 300
S From an a djacent opening window (ver tical only) 300
T Ad jacent to windows or openings o n pitched and flat roofs 600
U Below windows or openings on pitched roofs 2000

1. In addit ion, the terminal should be no nearer tha n 150mm to an

opening in the building fabric formed for the purpose of
accommodating a built-in element such as a window fr ame.

2. Only ONE 25mm clearan ce is allowed per installation . If one of

the dimensions D, E, F, G or H is 25mm then the remainder MUST
be as B.S.5440-1.

Plume
displacement kit

IMPORTANT:

If fitting a Plume
Displacement Flue Kit,
the air inlet must be a
minimum of 150mm
from any opening
windows ordoors

Terminal
assembly

Top view rear flue

300mm

min*

Air inlet

Opening window

NOTE:

or door

The distance from a fanned draught
appliance terminal installed parallel to a
boundary may not be less than 300mm
in accordance with the diagram.

Property boundary line

150mm
min.

* This can be reduced to 25mm by using item 6/ 7/8 flue d eflector.

25

MAIN UNVENTED CYLINDER

B

26

Key features Benefits

One year parts and labour warranty plus 25 year
warranty on stainless steel inner vessel

120, 150, 170, 210, 250 and 300 litre capacity –
direct and indirect types

Indirect heating coil is factory fitted with an
electric immersion heater as back up

Coil in coil heat exchanger Ensures rapid, energy ecient heat recovery

Incoloy 800 alloy sheathed elements Designed to resist corrosion

KIWA approved Complies with water regulations and

50mm of polyurethane foam insulation Minimum heat loss and maximum eciency

†

For peace of mind

A cylinder for every style and size of property,
to meet all hot water demands

Hot water whenever it is needed

Building Regulation G3

Main

Unvented Cylinder

Manufactured in the UK, the Main Unvented Hot
Water Cylinder is easy to install, with front access
to controls and connections. The coil-in-coil
heat exchanger ensures rapid heat recovery and
50mm of factory injected polyurethane foam
ensures that heat loss and running costs are kept
to a minimum. The inner cylinder is made from
high grade stainless steel for a long product life
with low maintenance.

The Main Cylinder, together with a Main Eco
Compact System boiler or Main Eco Elite System
boiler, provides a complete solution for homes
with a high demand for hot water.

†

Subject to registration and an annual service. Terms and conditions apply. Visit baxi.co.uk/warranty

27

MAIN UNVENTED CYLINDER

25°

45°

30°

45°

595

Ø

550

Technical specifications

Dimensions and minimum clearances

HOT OUTLET

T&P VALV E

Ø

A

550

B

PRIMARY FLOW

COLD INLET

PRIMARY RETURN

315

354 - indirect

306 - direct

Nominal
Capacity
(litres)

120 931 616 121 C 720635901

120

150

150

170

170

210

210

250

250

300

300

Type

Direct Indirect

Dimensions

A (mm)

Dimensions

B (mm)

931 616 12.5 27 23 29 B 5133561

1114 800 152 C 720636001

1114 800 12.5 38 24 37 C 5133562

1241 927 173 C 720 636101

1241 927 16 33 25 35 C 5133563

1499 1184 215 C 720636201

1499 1184 16 41 29 43 C 5133564

1752 1437 260 D 720636301

1752 1379 18 40 30 43 D 5135327

2065 1751 315 D 720636401

2065 1694 19 47 35 49 D 5135328

Rating

kW

Coil Heat

Up Time

(mins)

Recovery

Times

Heating

45°

Time

Direct

(mins)

25°

Rating

ErP

30°

45°

Product

Code

595

Standing
Heat Loss
(kW/h per

24hr)

1.47

1.7

1.92

2.3

2.22

2.52

28

Installation

Main unvented cylinders must be installed by a competent installer
in accordance with local regulations:

England and Wales – Building regulation G3.

Scotland – Technical standards P3.

N. Ireland – Building regulation P5.

Element

Long-life removable Incoloy 800
sheathed element, rated 3.0kW @
240V. Direct models are fitted with two

3.0kW immersion heaters as standard.

Outer casing

A combination of resilient
thermoplastic mouldings and plastic
coated corrosion proofed steelsheet.

Fixing – Feet on bottom moulding for floor mounting.

Plumbing connections – Inlet/Outlet, 22mm compression fittings / ¾” BSP

parallel thread.

Primary coil – 22mm compression fittings / ¾” BSP parallel thread.

Temperature and pressure relief valve – 15mmcompressionoutlet.

Cold water control – Integrated cold water control set comprising pressure

reducing valve and strainer – factory set at 3.5 bar, expansion relief valve –
factory set at 6 bar and check valve. 22mmcompression fittings.

Mains pressure – Min 1.5 bar, Max 16 bar. A 2-port motorised valve is
supplied with indirect models.

Flow rates – Up to 55 litres per minute @ 6 bar pressure.

Operating pressure – 3.5 bar.

Expansion relief valve pressure – 6.0 b ar.

Operating temperature – Recommended 60°C. Adjustable 10-70°C.

Water expansion – Remote expansion vessel

12 litre vessel supplied with 120 and 150 litre models.
18 litre vessel supplied with 170 and 210 litre models.
24 litre vessel supplied with 250 and 300 litre models.

Minimum water supply requirements – Recommended minimum supply
pressure – 1.5 bar/20 l/min flow rate.

If there are any doubts about water supply pressure or flow rates, please
contact our Specification Advice Team to discuss on0845026 4620.

Secondary circulation – Via 22 x 22 x 15mm swept tee, whichshould be fitted
to the inlet pipework. Secondary Circulation is not recommended for direct units
being used with o-peak electricity taris.

Pressure testing – Units are tested to 15 bar.

Tund ish – 15mm compression inlet and 22mm compression outlet.

Thermal insulation

CFC/HCFC free (ODP ZERO)
fire retardant expanded
polyurethane. 50mmthickness.

Inner container

Highgrade stainless steel,
pressure tested to 15 bar.

Primary coil

22mm diameter stainless
steel. Coil-in-coil design for
improved performance.

Thermostat

Element thermostat adjustable
from 10°C to 70°C.

Safety features

Temperature and pressure relief valve,
factory set tooperate at 10 bar and
90°C. High limit thermostat,factory
set at 80°C. Direct models – Manually
re-settable cut-out on heating
element operates at 80°C.

Indirect models

Must be wired in series with the
supplied two-portmotorised
valve to provide primary over
temperature protection.

Electrical

Indirect models – Controls should be wired to the boiler, programmer etc.,
in accordance with the control scheme being used.

Direct models – Connection is direct to terminals in the immersion heater which
must be permanently connected to the supply through a double-pole lined
isolating switch with a minimum breaking capacity of 13A.

All electrical wiring must conform to the latest IEE Wiring Regulations.

Anode

None required.

Approvals

KIWA approved forwater regulations
and building regulation G3.
Manufactured in the UK in a BS EN
ISO 9001:2008 registered factory. CE
marked for compliance with LVD, EMC
andpressure equipment directives.

29

Controls and accessories

The range of Main Eco Compact controls that can be fitted
quickly and simply.

720971601

Baxi wired room
thermostat

720644801

BAXI programmable
7-day wireless sensor
(2 channel) (twin
channel programmer
for system)

7212444

Baxi single channel
wired programmer

7649277

Baxi uSense wired
smart thermostat

7212438

Baxi single channel
wired programmable
thermostat

7683084

Baxi IFOS In Flue
Outdoor Sensor Kit

720030701

MAIN RF digital
7-day programmable
roomstat

7703233

On wall outdoor
sensor

30

7715591

Main Eco Compact
pre-plumb jig

248221

Multifit filling loop

7665482

Multifit Easy-Fill

Notes

31

Notes

32

33

How we can help

Baxi Customer Support

• Team of experts with products at hand to support
installation, service and repair

• Further technical support and how-to videos
available at baxi.co.uk

Call us on 0344 871 1525

Baxi Genuine Parts

• Approved parts for Baxi products

• Guaranteed quality, safety and reliability

• Nationwide network of approved stockists

• Lifetime support for Baxi products

• Range of heating essentials available

Call our knowledgeable and helpful team on 0344 871 1540
or visit www.baxi.co.uk/trade/boilers-parts-and-accessories/parts
to identify parts and find your nearest stockist

Training

• Practical, hands on training

• Free of charge product training

• A range of specialist courses

• Expert trainers, all accredited, former heating engineers

• Training centres across the UK

34

Visit baxi.co.uk/training or call 0344 335 4207

Baxi Works

Sign up to Baxi Works, Baxi’s online loyalty scheme for installers.
Benefits include:

• Same or next day engineer call out from Baxi Customer Support*

• Free Gas Safe notification and easy warranty registration

• Scan your barcodes using the Baxi Toolbelt App

• Free annual service reminders sent to your customers on your behalf

• Free listing on baxi.co.uk to receive homeowner leads

• Earn points for every boiler you register

Visit baxiworks.co.uk to find out more

Events

Visit Baxi Area Sales Managers at your local merchant for an opportunity
to get your hands on the latest Baxi boilers and discuss developments
in the heating industry.

For more information visit baxievents.co.uk

Literature

You can order all the literature you need for you and your customers, including:

• Range guides

• Product brochures for consumers

• Installation instructions

• User guides

• Instructions for discontinued products

Call the Baxi literature hotline on 0344 871 1525 or contact your
local Baxi Area Sales Manager.

All our literature can be downloaded from our website baxi.co.uk

* Full Baxi Works terms and conditions apply.

35

0344 871 1525

Opening hours

Monday – Friday, 8am – 6pm
Weekends and Bank Holidays, 8.30am – 2pm
We are open 365 days a year.

Please note calls may be monitored or recorded.

mainheating.co.uk

[e-mail]

Main Heating

Brooks House

Coventry Road

Warwick CV34 4LL

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MainHeatingRangeGuideOct22