Baxi Solo 3 PF Quick Start Manual

Baxi Solo 3 PF

Wall Mounted Powered Flue

Gas Fired Central Heating Unit

Installation and
Servicing Instructions

Please leave these instructions with the user

2

Baxi UK Limited is one of the leading manufacturers

of domestic heating products in the UK.

Our first priority is to give a high quality service to our

customers. Quality is built into every Baxi product -

products which fulfil the demands and needs of

customers, offering choice, efficiency and reliability.

To keep ahead of changing trends, we have made a

commitment to develop new ideas using the

latest technology - with the aim of continuing to

make the products that customers want to buy.

Everyone who works at Baxi has a commitment to

quality because we know that satisfied customers

mean continued success.

We hope you get a satisfactory service from Baxi. If

not, please let us know.

Natural Gas

Baxi Solo 3 30 PF

G.C.No. 41 075 04

Baxi Solo 3 40 PF

G.C.No. 41 075 05

Baxi Solo 3 50 PF

G.C.No. 41 075 06

Baxi Solo 3 60 PF

G.C.No. 41 075 07

Baxi Solo 3 70 PF

G.C.No. 41 075 08

Baxi Solo 3 80 PF

G.C.No. 41 075 09

Baxi is a BS-EN ISO 9001
Accredited Company

The boiler meets requirements of Statutory
Instrument “The Boiler (Efficiency) Regulations
1993 N

o

3083” and is deemed to meet the
requirements of Directive 92/42/EEC on the
efficiency requirements for new hot water boilers
fired with liquid or gaseous fuels:-

Type test for purpose of Regulation 5 certified by:
Notified Body 0086.

Product/Production certified by:
Notified Body 0086.

For GB / IE only.

3

1.0 Introduction 4

2.0 Technical Data 5

3.0 System Details 7

4.0 Site Requirement 10

5.0 Installation 14

6.0 Commissioning the Appliance 32

7.0 Fitting the Outercase 34

8.0 Overheat Cut-Off Device 35

9.0 Annual Servicing 36

10.0 Changing Components 38

11.0 Fault Finding 42

12.0 Short Parts List 44

13.0 Notes 45

Section Page

Contents

1.0 Introduction

4 1

STANDARD

B.S. 6891

B.S. 5546

B.S. 5449

B.S. 6798

B.S. 5440: Pt 1

B.S. 5440: Pt 2

B.S. 7593

B.S. 4814

B.S. 6283

SCOPE

Gas Installation.

Installation of hot water supplies for

domestic purposes.

Forced circulation hot water systems.

Installation of gas fired hot water

boilers.

Flues.

Ventilation.

Water Treatment.

Expansion vessels for hot water

systems.

Safety and control devices for use in

hot water systems.

HEAT OUTPUT Q

Model Min Max

30 5.86kW (20,000 Btu/h) 8.79kW (30,000 Btu/h)
40 9.09kW (31,000 Btu/h) 11.72kW (40,000 Btu/h)
50 12.02kW (41,000 Btu/h) 14.65kW (50,000 Btu/h)
60 14.95kW (51,000 Btu/h) 17.58kW (60,000 Btu/h)
70 17.88kW (61,000 Btu/h) 20.5kW (70,000 Btu/h)
80 20.8kW (71,000 Btu/h) 23.45kW (80,000 Btu/h)

B.S. Codes of Practice, most recent

version should be used

1.1 Description

1. The Baxi Solo 3 PF is a gas fired room sealed
fan assisted central heating boiler with range rated
outputs as shown in the table below

2. Each appliance is preset at a MID

RANGE heat

input rating and is designed for use on

NATURAL

GAS

only.

3. All boilers are suitable for fully pumped open
vented central heating and domestic hot water
systems and sealed systems.

4. The appliance data badge is fitted to the
combustion box door.

1.2 Installation

1. The appliance is suitable for installation only in
G.B. and I.E. and should be installed in
accordance with the rules in force. For Ireland
install in accordance with I.S.813

“INSTALLATION OF

GAS APPLIANCES”. The installation must be carried

out by a CORGI Registered Installer or other
competent person and be in accordance with the
relevant requirements of the current

GAS SAFETY
(Installation and Use) REGULATIONS, the BUILDING
REGULATIONS (Scotland) (Consolidation), the
LOCAL BUILDING REGULATIONS, the CURRENT I.E.E.
W

IRING REGULATIONS and the bye laws of the Local

Water Undertaking. Where no specific instructions
are given, reference should be made to the
relevant current

BRITISH STANDARD CODES

OF PRACTICE.

2. All systems must be thoroughly flushed and
treated with inhibitor (see Section 3.1).

1.3 Important Information

Man-Made Mineral Fibre

a) Some component parts of this appliance
(insulation pads, gaskets and rope seals) are
manufactured from man-made mineral fibre.

b) Prolonged or excessive exposure to this
material may result in some irritation to the eyes,
skin or respiratory tract.

c) It is advisable to wear gloves when handling
these items.

d) Irritant dust will only be released from the items
if they are broken up or subjected to severe
abrasion. In these instances a suitable dust mask
and goggles should be worn.

e) Always thoroughly wash hands after
installation, servicing or changing components.

f) When disposing of any items manufactured from
man-made mineral fibre care must be exercised.

g) If any irritation of the eyes or severe irritation of
the skin is experienced seek medical attention.

IMPORTANT: State of adjustment - Check that
the state of adjustment given on the data plate
is compatible with local supply conditions.

“Benchmark” Log Book

As part of the industry-wide “Benchmark” intiative all Baxi boilers now
include an Installation, Commissioning and Service Record Log Book.
Please read the Log Book carefully and complete all sections relevant to
the appliance and installation. These include sections on the type of
controls employed, flushing the system, burner operating pressure etc.
The details of the Log Book will be required in the event of any warranty
work. Also, there is a section to be completed at each subsequent regular
service visit.

2.0 Technical Data

1 5

Model 30 40 50 60 70 80

P Heat Output (Max) kW 8.79 11.72 14.65 17.58 20.5 23.45

Btu/h 30,000 40,000 50,000 60,000 70,000 80,000

P Heat Output (Min) kW 5.86 9.09 12.02 14.95 17.88 20.8

Btu/h 20,000 31,000 41,000 51,000 61,000 71,000

Q Heat Input (Max) kW 10.99 14.65 18.32 21.98 25.64 29.31

Btu/h 37,500 50,000 62,500 75,000 87,500 100,000

Q Heat Input (Min) kW 7.33 11.36 15.02 18.68 22.35 26.01

Btu/h 25,000 38,750 51,250 63,750 76,250 88,750

Burner Pressure (Max) mbar 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5 16.0 ±0.5

in wg 6.4 ±0.2 6.4 ±0.2 6.4 ±0.2 6.4 ±0.2 6.4 ±0.2 6.4 ±0.2

Burner Pressure (Min) mbar 8.0 ±0.5 10.0 ±0.5 11.5 ±0.5 11.5 ±0.5 12.1 ±0.5 11.5 ±0.5

in wg 3.2 ±0.2 4.0 ±0.2 4.4 ±0.2 4.4 ±0.2 4.8 ±0.2 4.4 ±0.2

Gas Rate CV 38mj/m31.04m3/h 1.39m3/h 1.74m3/h 2.08m3/h 2.43m3/h 2.78m3/h

(after 10 mins) 36.86ft3/h 49.0ft3/h 61.3ft3/h 73.5ft3/h 86.75ft3/h 98.1ft3/h

Lifting Weight kg 23.1 23.1 23.1 32.2 32.2 32.2

lbs 51 51 51 71 71 71

Water Content litres 1.1 1.1 1.1 1.6 1.6 1.6

pints 1.9 1.9 1.9 2.8 2.8 2.8

Outercase Height 600mm 600mm 600mm 600mm 600mm 600mm

Dimensions Width 350mm 350mm 350mm 462mm 462mm 462mm

Depth 287mm 287mm 287mm 287mm 287mm 287mm

Flue Terminal Diameter 100mm

Dimensions Depth 70mm

Static Head Max 30 metres (100 ft)

Min 1 metre (3.25 ft)

Connections Flow 22mm Cu tail

Return 22mm Cu elbow

Heat Exchanger Cast iron monobloc

Low Head Min 0.2m (8 in)

System Design fully pumped open vented and sealed systems

Gas Connection RC

1

/2(1/2in BSPT)

Electrical Supply 230V ~ 50Hz fused 5A - 90W

Controls boiler thermostat, intermittent pilot & electronic flame sensing,

timed pump over-run, frost protection thermostat

Internal Fuse 4AF 250V to BS4256 situated on control board

2.0 Technical Data

6

25

75

121

392

439

442

268

144144

4

107 Dia
without
internal
fitting

117 Dia
with
internal
fitting

Centre of
Gas Connection

8 Slots
20 x 6

Layout of Fixing Points
30, 40 and 50 PF models

25

75

121

392

439

442

380

196196

52

107 Dia
without
internal
fitting

117 Dia
with
internal
fitting

Centre of
Gas Connection

8 Slots
20 x 6

Layout of Fixing Points
60, 70 and 80 PF models

(4) 10

(8) 20

(16) 40

(24) 60

(12) 30

(20) 50

(28) 70

(32) 80

(36) 90

(40) 100

(44) 110

(48) 120

2 4 6 8 1012 1416 18 2022

Water Flow Rate litres / min

Pressure Drop mbar (in wg)

2426 28 30

(52) 130

(4) 10

(8) 20

(16) 40

(24) 60

(12) 30

(20) 50

(28) 70

(32) 80

(36) 90

(40) 100

(44) 110

(48) 120

2 4 6 8 1012 1416 18 2022

Water Flow Rate litres / min

Pressure Drop mbar (in wg)

2426 28 30

(52) 130

30, 40 and 50 PF models

60, 70 and 80 PF models

Templates

Hydraulic Resistance Charts

• This appliance is only intended for installation on a governed supply.

• PMS = 3 bar pressure class 2

• Max CH water pressure 3 bar

• Type C

12,C32, C52

• Nox class 2

• Appliance category I

2H

2H - G20 - 20mbar

• Ref: 86/AU/588

• Burner Injector Sizes: 30=B12 40=B13 50=B14 60=B15 70=B30 80=B16

• This boiler is designed to operate at a maximum water temperature of 85° C.

61.3mm

Model Seasonal Efficiency

(SEDBUK) (%)

30 78.8

40 77.8

50 76.7

60 77.8

70 77.7

80 77.8

This value is used in the UK Government’s Standard

Assessment Procedure (SAP) for energy rating of

dwellings. The test data from which it has been

calculated have been certified by 0086.

SEDBUK Declaration For Solo 3 PF

All Models

121mm

Top of Outercase

3.0 System Details

7

Typical Systems
Arrangement

Option A

Boiler

Pump

Air Vent

Radiator
Circuit

Fully Pumped System

Air
Vent

Radiator
Circuit

Twin Zone

Valve System

Air
Vent

Radiator
Circuit

3 Port Divertor

Valve System

Option B

Radiator

Circuit

Option C

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Examples of systems which require a
bypass are:-

a) A system controlled by non-electrical
valves e.g. mechanical thermostatic control
valves both on the radiators and the hot
water circuit.

b) A system using twin zone valves (e.g.
Honeywell 'S' Plan) (Fig. 3).

c) A system using a 3 port divertor valve
(Fig. 4) does not normally require a bypass
therefore this system is recommended. The
exception to this is where thermostatic
radiator valves are used and then a bypass
is required.

NOTE: For ‘S’ Plan systems the bypass
flow circuit must be situated between
pump and zone valves as option A
shows (Fig. 2).

The bypass circuit can be:-

a) For all boilers a minimum of 6 metres of
22mm copper pipe, (measured between the
boiler flow and return connections). It
should be fitted with a lock shield valve
opened at least 1 full turn or a proprietary
bypass valve set to give a minimum flow
rate of 8 litres/min (1.8 gal/min) (Option C,
Fig. 1 & Option A, Fig.2).

b) A radiator fitted with lock shield valves.
The radiator output should be a minimum of
800 watts (2,700 Btu/h). Typically a
convector type radiator with an area of
3750 cm

2

(4 sq ft) is adequate (Option B,

Fig. 1).

c) Any circuit that provides the same
operating conditions as option A or option B
(Figs. 1 & 2).

3.1 Water Circulating Systems

1. The appliance is suitable for use with open
vent fully pumped systems and sealed systems
where additional control protection is required.

The following conditions should be observed
on all systems:

• The static head must not exceed 30m (100ft) of
water.

• The boiler must not be used with a direct cylinder.

• The boiler is fitted with a timed pump overrun that

will operate for approximately 8 minutes.

• Drain cocks should be fitted to all system low
points.

• All gas and water pipes and electrical wiring must
be installed in a way which would not restrict the
servicing of the boiler.

• Position isolating valves as close to circulating
pump as possible.

Treatment of Water Circulating Systems

• All recirculatory water systems will be subject to
corrosion unless an appropriate water treatment is
applied. This means that the efficiency of the system
will deteriorate as corrosion sludge accumulates
within the system, risking damage to pump and
valves, boiler noise and circulation problems.

• For optimum performance after installation this
boiler and its associated central heating system
must be flushed in accordance with the guidelines
given in BS 7593:1992 “Treatment of water in
domestic hot water central heating systems”.

• This must involve the use of a proprietary
cleanser, such as BetzDearborn Sentinel X300 or
X400, or Fernox Superfloc. Full instructions are
supplied with the products, but for immediate
information please contact BetzDearborn (0151 420

9563) or Fernox (01799 550 811) directly.

• For long term protection against corrosion and
scale, after flushing it is recommended that an
inhibitor such as BetzDearborn Sentinel X100, or
Fernox MB-1 or Copal is dosed in accordance with
the guidelines given in BS 7593:1992.

Failure to flush and add inhibitor to the system
may invalidate the appliance warranty.

• It is important to check the inhibitor concentration
after installation, system modification and at every
service in accordance with the inhibitor
manufacturer’s instructions. (Test kits are available
from inhibitor stockists.)

• For information or advice regarding any of the
above contact the Baxi Helpline.

3.2 Bypass Requirements

1. The boiler is fitted with a pump overrun device
which allows the removal of residual heat from
the boiler.

NOTE: The pump overrun will operate for
approximately 8 minutes. The system design
must therefore, always provide an open circuit for
water to circulate between the boiler flow and
return.

2. See information opposite “Examples of systems

which require a bypass are”.

3.0 System Details

8

3.3 Pipework

1. The sizes of flow and return pipes from the
boiler should be determined by normal methods,
according to the requirements of the system.

2. An 11 °C (20°F) drop in temperature across the
system is recommended.

3. In systems using non-metallic pipework it is
necessary to use copper pipe for the boiler Flow
and Return. The copper must extend at least 1
metre from the boiler and include any branches
(Fig. 4a). The copper pipe must not be insulated.

3.4 System Controls

1. For optimum operating conditions, the heating
system into which the boiler is installed should
include a control system.

2. Such a system will comprise of a timer control
and separate room or cylinder thermostats as
appropriate.

3. The boiler should be controlled so that it
operates on demand only.

4. Operation of the system under control of the
boiler thermostat only does not produce the best
results.

5. A frost thermostat is fitted integrally to the
appliance controls and will protect the boiler from
frost damage by operating the burner when the
water temperature in the boiler drops towards
freezing point. The boiler will fire as necessary to
maintain a temperature above freezing.

NOTE: The frost thermostat operates even if
the boiler thermostat is in the OFF ('0') position
and it is necessary therefore, if the system is
drained, for the external electrical and gas
supplies to be isolated. It is recommended that
a label be affixed to the appliance to draw
attention to the fact that the system has been
drained.

3.5 Low Head Installation

For boilers up to 50,000 Btu/h output

1. Using a close coupled arrangement the
minimum head is as shown in the diagrams
(Figs. 5 & 6) subject to the following conditions:

a) The correct heat input.
b) The pump being adjusted to give an 11

o

C

drop across the boiler.
c) The pump must be fitted on the flow.
d) The pump must be fitted in accordance with

the pump manufacturer's instructions.
e) The open vent pipe must be taken up from a

tee in a horizontal section of the flow pipe.

Alternative Low Head Installation for all Solo 3 PF

(Fig. 7)

2. If less height is available then a combined vent
and feed pipe may be connected. This must be a
minimum of 22mm diameter. It is recommended
that an air separator is fitted when using a
combined feed and vent pipe.

Typical Low Head Installation

If Conditions Require,
This System Possible

Alternative Low Head Installation

Boiler

500mm

45°

22mm
Open Vent

1000mm

Min

150mm

Max

15mm
Cold
Feed

400mm

Min Head

Return

Pump

Flow

Boiler

500mm

45°

22mm
Open Vent

400mm

Min Head

1000mm

Min

Automatic

Air Vent

15mm
Cold
Feed

150mm

Max

Return

Pump

Flow

Return

Pump

Flow

Boiler

200mm

Min

Air

Separator

22mm
Feed & Vent
Pipe

Fig. 5

Fig. 6

Fig. 7

Boiler

Flow

Return

Copper

0.5m

Copper

1m

Copper

0.5m

Fig. 4a

3.0 System Details

9

3.6 Sealed Systems (Fig. 8)

1. SAFETY VALVE - A safety valve complying
with the requirements of BS 6283 Part 1 must be
fitted close to the boiler on the flow pipe by means
of a horizontal or vertically upward connection
with no intervening valve or restrictions and
should be positioned to facilitate testing. The
valve should be pre-set and non-adjustable to
operate at a pressure of 3 bar (45 Ibf/in

2

). It must
be arranged to discharge any water or steam
through a pipe to a safe outlet position.

2. PRESSURE GAUGE - A pressure gauge of
minimum range 0-4 bar (0-60 Ibf/in

2

) with a fill
pressure indicator must be fitted to the system,
preferably at the same point as the expansion
vessel in an easily visible position.

3. EXPANSION VESSEL - An expansion vessel
complying with the requirements of BS 4814 must
be fitted to the system by means of a connection
close to the inlet side of the circulating pump in
accordance with the manufacturers instructions,
the connecting pipe being unrestricted and not
less than 15mm (

1

/2in) nominal size. The volume
of the vessel should be suitable for the system
water content and the nitrogen or air charge
pressure should not be less than the system static
head (See Table. 1).

Further details of sealed system design can be
obtained from BS 5449 and the British Gas
publication entitled 'Specifications for Domestic
Wet Central Heating Systems'.

4. FILLING POINT - A filling point and an
approved stop valve to BS 1010 must be fitted at
low level and the method used for filling the
system should be approved by the local water
undertaking. For further details see BS 6798.

5. MAKE UP SYSTEM - A method of replacing
water lost from the system should be provided
either by means of a make up vessel of not more
than 3 litres (5 pints) capacity, mounted above the
highest point of the system, or by pre­pressurisation of the system.

6. VENTING - A method of venting the system
during filling and commissioning must be provided
by fitting automatic air vents or by venting
manually.

7. HOT WATER STORAGE - The hot water
storage vessel must be of the indirect coil type.

8. SYSTEM COMPONENTS - All components
used in the system must be suitable for operation
at 110°C (230°F) and at the pressure allowed by
the safety valve.

Initial System
Pressure (Bar)

Vessel Charge
Pressure (Bar)

Multiply Total
Water Content Of
System By (Litres)

0.067

0.112

0.207

0.441

0.087

0.152

0.330

0.125

0.265

0.5

1.0

1.5

2.0

1.0

1.5

2.0

1.5

2.0

0.5

1.0

1.5

Example :-

Then :-

System Volume = 75 litres
Vessel Charge Pressure = 1.0 bar
Initial System Pressure = 1.5 bar
75 x 0.152 = 11.4 litres
Expansion Vessel Volume

Method of determining minimum

value of expansion vessel volume for

sealed systems using Baxi Boilers

NOTE

Where a vessel of the calculated size is not obtainable

then the next available larger size should be used.

Safety

Valve

Pressure

Gauge

Pump

Filling

Point

Air

Vent

3 Litre
Top Up Bottle
(if required)

Radiator
Circuit

Expansion
Vessel

System Drains
at Low Point

Max Boiler Flow

Temp = 82° C

Boiler

Fig. 8

Table. 1

4.0 Site Requirements

10

4.1 Location

1. The appliance may be fitted to any suitable wall
with the flue passing through an outside wall and
discharging to atmosphere in a position permitting
satisfactory removal of combustion products and
providing an adequate air supply. The appliance
should be fitted within the building unless otherwise
protected by a suitable enclosure ie. garage or
outhouse. (The appliance may be fitted inside a
cupboard. Cooling ventilation and insulation of the
cupboard are not required, see section 4.5.)

2. If the appliance is fitted in a room containing a bath
or shower reference must be made to the Current
I.E.E. Wiring Regulations and Building Regulations. If
the appliance is to be fitted into a building of timber
frame construction then reference must be made to
the Institute of Gas Engineers document UP7 - Guide
for Gas Installations in Timber Framed Dwellings.

3. Recommendations for flues are given in BS 5440
Part 1.

4.2 Minimum Clearances (Fig. 9)

1. A flat vertical area is required for the installation of
the boiler measuring as shown in the table below for
each model.

2. These dimensions include the necessary
clearances around the appliance for case removal,
spanner access and air movement. Additional
clearances may be required for the passage of pipes
around local obstructions such as joists running
parallel to the front face of the appliance.

3. If fitted inside a cupboard the clearance of 300mm
shown is only necessary when the cupboard door is
open. A clearance of 5mm (3/16in) is required when
the door is closed.

4.3 Flue Position

1. For installations where the flue terminal is
inaccessible from the outside, an internal fitting kit is
available. This can be obtained free of charge from
your local merchant.

2. The following guide lines indicate the general
requirements for siting balanced flue terminals.

3. If the terminal is fitted within 1 metre (39in) of a
plastic gutter, within 500mm (191/2in) of a painted
eave or a painted gutter, an aluminium shield of at
least 1 metre (39in) long should be fitted to the
underside of the gutter or painted surface. An air
space of 5mm (

3

/16in) should be left between shield

and gutter (Fig. 10).

4. If the terminal discharges onto a pathway or
passageway, check that combustion products will not
cause a nuisance and that the terminal will not
obstruct the passageway.

5. If the outer surface of an outside wall is of
combustible material, it should be protected by fitting
the flue trim provided.

Fig. 9

Fig. 10

300mm for servicing

5mm during operation

5mm5mm

350mm (30,40,50 models)

600mm

50mm

100mm

462mm (60,70,80 models)

Aluminium

Shield

Model

Height Width
mm (in) mm (in)

30 750 (291/2) 360 (141/8)
40 750 (291/2) 360 (141/8)
50 750 (291/2) 360 (141/8)
60 750 (291/2) 472 (185/8)
70 750 (291/2) 472 (185/8)
80 750 (291/2) 472 (185/8)

287mm

4.0 Site Requirements

11

4.3 Flue Position (Cont)

WARNING - The addition of anything that may

interfere with the normal operation of the
appliance (e.g. FLUE DAMPERS,
ECONOMISERS,etc.) without the express
written permission of Baxi UK Limited could
invalidate the appliance warranty and infringe
the GAS SAFETY (Installation and Use)
REGULATIONS.
If a terminal is less than 2 metres (78

3

/4in)
above a balcony, above ground or above a flat
roof to which people have access then a
suitable terminal guard must be provided.

6. Table 2 and Fig. 11 show the positioning of the
flue terminal relative to buildings and other
structures.

7. The dimensions of the flue terminal are shown
on page 5.

4.4 Flue Dimensions

1. Flue extensions are available as optional
extras for installations up to 3 metres
(118

1

/8 in).

2. Vertical flue kits are available up to 4
metres in length. Vertical twin flue kits are
available up to 15 metres in length.

IMPORTANT: Solo 3 30 PF models must not

be set at minimum input when installed with
vertical flue systems.

3. The standard telscopic flue is suitable for use
with rear flue lengths between 100mm (4in) and
500mm (19

5

/8in).

NOTE: Maximum flue length when flued to the
left or right is

410mm (16in) - 30, 40, 50 PF
355mm (14in) - 60, 70, 80 PF

4. Where it is intended to pass the flue through a
combustible wall or timber framed dwelling,
reference should be made to the Institute of Gas
Engineers document UP7 - Guide for Gas
Installations in Timber Framed Dwellings.

5. If the flue is more than 1 metre (39 in) long, it
is required that it is supported.

6. All above dimensions are taken from the

respective faces of the outer case.

Table. 2

Fig. 12

Fig. 11

Terminal Position with Minimum Distance (mm)

A Directly below an openable window or other

opening, e.g. an air brick. 300
B Below gutters. 25
C Below eaves, soil pipes or drain pipes. 75
D Below balconies or car port roof 200
E From vertical drain pipes and soil pipes. 75
F From internal or external corners. 25
G Above ground, roof or balcony level. 300
H From a surface facing a terminal. 600
I From a terminal facing a terminal. 1200
J Vertically from a terminal on the same wall. 1500
K Horizontally from a terminal on the same wall. 300
L For an opening in a car port (e.g. door, window)

into a dwelling. 1200

K

G

G

E

L

D

J

G

A

A

D

F

H,I

B,C

F

Likely flue positions requiring
a flue terminal guard

Maximum lengths for side flues using the standard telescopic flue kit

410mm (30, 40, 50)

410mm (30, 40, 50)

355mm (60, 70, 80) 355mm (60, 70, 80)

4.0 Site Requirements

12

4.5 Ventilation of Compartments

1. Where the appliance is installed in a
cupboard or compartment, no air vents are
required.

NOTE: The ventilation label on the front of

the outer case MUST NOT BE REMOVED
when the appliance is installed in a
compartment or cupboard.

2. B.S. 5440 refers to room sealed appliances
installed in compartments. The Solo 3 PF will run
sufficiently cool without ventilation.

4.6 Gas Supply (Fig. 13)

1. The gas installation should be in accordance
with BS 6891.

2. The connection of the appliance is a RC

1

/2(1/

2

in BSPT internal) located at the rear of the gas
cock.

3. Ensure that the pipework from the meter to
the appliance is of adequate size. Do not use

pipes of a smaller diameter than the
appliance gas connection.

4.7 Electrical Supply

External wiring must be correctly earthed,
polarized and in accordance with CURRENT
I.E.E. WIRING REGULATIONS.

The mains supply is 230V ~ 50Hz fused at 5A.

NOTE: The method of connection to the
electricity supply must facilitate complete
electrical isolation of the appliance.

Connection may be made via a fused double­pole isolator with a contact separation of a least
3mm in all poles and serving the appliance and
system controls only.

Fig. 13

4.0 Site Requirement

13

4.8 Flue Options

1. The Baxi Solo 3 PF can be fitted with flue
systems as illustrated.

2, The standard flue is suitable only for
horizontal applications.

3. Maximum permissible equivalent flue lengths
are:-

Horizontal 3.0 metres
Vertical 4.0 metres
Vertical (Twin) 20.0 metres

4. Any additional “in line” bends in the flue
system must be taken into consideration. Their
equivalent lengths are:-

Concentric Pipes:

45° bend 0.5 metres
90° bend 1.0 metres

Twin Flue Pipes

Air Duct Flue Duct
45° bend 1.3 metres 3.3 metres
90° bend 4.8 metres 12.0 metres

5. The illustrations opposite show examples of
maximum equivalent lengths.

6. Full details of part numbers and descriptions
of all optional flue components and kits can be
found in Baxi Gas Central Heating Boilers
Installers’ Guide.

7. Instructions for guidance and fitting are
included in each kit.

IMPORTANT: Solo 3 30 PF models must not
be set at minimum input when installed with
vertical flue systems.

Horizontal
Flues

Vertical
Flues

Vertical
Flues
(Twin Pipe)

Maximum Length = 2m inc. 2 x 45° bends

Maximum Length = 21m
inc. 4 x 45° bends

Maximum Length = 2m
inc. 2 x 90° bends

5.0 Installation

14

5.1 Initial Preparation

1. Unpack contents of carton.

2. Remove the lower door panel from the outer
case. Remove the 2 screws holding the outer
case to the combustion box.

3. Place the ready assembled outer case in a
safe place until required.

4. Release the R clip from the top latch securing
the combustion box to the back plate and
release both latches (Fig. 14).

5. Lift and remove the combustion box from the
back plate (Fig. 15). Place the combustion box
on its back.

IMPORTANT - When installing a Solo 3 with
a rear flue see section 5.2 before continuing
the installation.

6. Proceed to the relevant section for flueing the
appliance either to the Rear, Left, Right or
Vertically.

NOTE: For Vertical flueing or flue lengths
greater than standard, the relevant optional
extra kits must be obtained and their
instructions followed.

Fig. 14

Fig. 15

5.0 Installation

15

5.2 Fan Outlet Restrictor

(30, 40, 50, 60, 70 and 80)

Rear Flue only up to 500mm (195/8in)

1. Release the four latches holding the
combustion box door (Fig 18). Remove the
combustion box door by pulling forward (Fig. 16).

2. Release the 5-pin electrical plug connecting
the pressure switch and fan (Fig. 17). Withdraw
the fan assembly by pulling forwards from the
top edge (Fig. 16).

3. Take the sheetmetal restrictor (supplied in the
kit of parts), check that the number stamped on
the restrictor matches the appliance (e.g. 50
stamped on the restrictor is for 50 PF appliance)

4. Fit the restrictor to the fan outlet flange,
bending the 3 lugs equally ensuring the restrictor
seals against the fan outlet flange (Fig. 19).

5. Re-assemble the fan assembly and
combustion box door ensuring that the flexible
tubes from the fan unit to the pressure switch are
routed correctly and that they are not kinked or
flattened (Fig. 19a).

Fan Outlet Flange

Fan Outlet Restrictor

Fig. 17

Fig. 18

Fig. 16

Fig. 19

Flexible Tubes

Fig. 19a

5.0 Installation

16

5.3 Position the Boiler

1. Choose a suitable position for the boiler
making necessary allowances for the minimum
clearances required (see page 10).

2. Hold the wall template against the wall at the
required boiler location. Ensure that the top of
the template is level (Fig. 20).

3. The template represents the outer limits of the
appliance plus the required minimum side
clearance.

4. Mark the position of the flue hole centre and
the inward pointing corners of the two triangular
cutouts in the template. Mark the position of the
four fixing holes. Where possible use the
uppermost and lowest fixing hole positions,
otherwise space the fixing holes as far apart as
possible (Fig. 20).

5.4 Rear Flue

Concentric flue kits are available to allow 3
metres horizontal and 4 metres vertical
flueing. Twin flue at 80mm diameter will allow
up to 15 metres vertical flueing.

1. For installations where the flue terminal is
inaccessible from the outside, an internal fitting
kit is available. This can be obtained from your
local merchant quoting Baxi Part N

o

236441.

2. If using the internal fitting kit a 117mm

(4

5

/8in) diameter hole is required.

3. Drill the anchorage holes 63mm (2

1

/2in) deep

to accept suitable wall plugs (Fig. 21).

4. Using the previously marked flue hole centre,
cut a hole approximately 107mm (4

1

/4in)
diameter in the masonry for the 100mm (4 in)
diameter flue duct. (When using a core drill, it is
important to keep the drill level and square).

Fig. 20

Fig. 21

5.0 Installation

17

5.5 Rear Flue Preparation

Wall thickness 285mm - 500mm (115/16- 193/8) go
to section 5.6.

Wall thickness 100mm - 284mm (4 in - 11

3

/16in).

If the wall thickness is less than 285mm (11

3

/16in),
it will be necessary to cut the components of the
flue to the appropriate size.

1. Measure the wall thickness (Fig. 22). Mark this
dimension on the Flue Duct from the flared end
and cut the waste off the plain end (Fig. 23).

2. Take the Flue Terminal Assembly and
measure from the terminal end the wall thickness
and subtract 40mm (Fig. 23a). Cut the waste off
the plain end.

Wall Thickness - 40mm (all boilers)

3. The cardboard support should be installed onto
the flue tubes to ensure the assembly is
supported during cutting (Fig. 25 & 26).

4. Measure the same amount from the flange end
of the Air Duct and cut the waste off the plain end
(Fig. 24).

Wall Thickness - 40mm (all boilers)

5. Go to section 5.6.

Wall Thickness

Fig. 23

Fig. 23a

Fig. 24

Fig. 25

Fig. 26

Fig. 22

Waste Wall Thickness

Flue Duct

WasteWall Thickness - 40mm

Wall Thickness - 40mmWaste

Cardboard

Support

Cut Line

Flue Terminal Assembly

Air Duct

Cardboard

Support

5.0 Installation

18

5.6 Assembly of Rear Flue

1. Remove the rear air box blanking plate from
the back plate by releasing the three screws
(Fig. 27).

2. Remove the blanking cap at the rear of the
turret, by pushing and turning anti-clockwise to
release the bayonet fitting (Fig. 27).

3. Locate the flared end of the flue duct over the
bayonet fitting on the turret, taking care not to
damage the 'O' ring. Lock the flue duct in place by
pressing in and turning clockwise (Fig. 28).

4. Engage the bayonet slots of the air duct over
the location lugs on the back plate opening and
press and turn clockwise to secure the air duct to
the back plate (Fig. 29).

5. In order to increase security of the flue, the
bayonet tags may be deformed to secure the flue
in position.

6. Take the flue terminal assembly and engage
on the flue and air ducts. Slide the flues together
to the desired wall thickness.

7. Tape the sections of the outer ducts together
with the tape provided ensuring a good seal is
made (Fig. 30).

Fig. 27

Fig. 28

Fig. 29

Flue Duct

Air Duct

Tape

Fig. 30

Air Box
Blanking Plate

Blanking
Cap

Backplate

5.0 Installation

19

5.7 Fitting the Back Plate

1. Engage the assembly into the hole previously
cut in the wall and slide in place (Fig. 31).

2. Secure the assembly to the wall at the
previously drilled anchorage points with suitable
screws (Fig. 31). Before finally tightening the
screws, check that the assembly is level.

3. Make good between the wall and the air duct
outside the building if the internal fitting kit has
not been used (Fig. 32).

4. The flue trim provided may be fitted if required,
to neaten the make-up around the terminal
(Fig. 33).

5. To fit the flue terminal trim:

a) The trim should be fitted once the flue is
secure.

b) Take the three edge clips from the kit and fit
them equi-spaced onto the inner flange of the
trim (Fig. 32a).

c) With the flanges towards the wall pass the trim
over the terminal. If required a bead of sealant
may be applied to the rear face of the trim.

d) Push firmly on the trim to ensure the edge clips
engage on the flue.

Fig. 31

Fig. 33

Fig. 32

Edge Clip

Flue Trim

Flue Trim

Fig. 32a

5.0 Installation

20

5.8 Left or Right Flue

Concentric flue kits are available to allow 3
metres horizontal and 4 metres vertical
flueing. Twin flue at 80mm diameter will allow
up to 15 metres vertical flueing.

NOTE: If the flue terminal is inaccessible from

outside the building, it is necessary to fix the
internal fitting kit in position before continuing
with the installation. (See section 5.15 Internal
Fitting Kit of these instructions).

1. The procedure for fitting the appliance flued to
the left or right hand side is the same.

2. 30-40-50 PF - Left/Right Hand Side maximum
flue 410mm (16 in).

3. 60-70-80 PF - Left/Right Hand Side maximum
flue 355mm (14 in).

4. Using the previously marked flue hole centre
(Section 5.3) and the two marks made at the
triangular cutouts of the template, mark the
horizontal centre line for the flue assembly
(Fig. 34).

5. Extend this line either left or right as required,
to the corner of the room (Fig. 34).

6. Extend the horizontal centre line around the
corner for approximately 300mm (12 in). Ensure
that the line remains horizontal by checking with a
spirit level (Fig. 35).

7. From the wall template cut out the ‘D’ shaped
section. Using this as a template, line up the
horizontal triangular cut outs with the extended
300mm (12 in) line and make sure that the flat of
the template is butted up against the corner of the
wall (Fig. 36).

8. If the appliance mounting wall is out of true, use
string or a straight edge to determine the true
corner position and mark a vertical line to
accommodate the flat edge of the template.

9. Holding the template firmly, mark the vertical
centre line for the flue assembly by marking the
point at the outer corners of the upper and lower
cut outs (Fig. 37).

10. Remove the template and draw a vertical line
between the two marks. The intersection of the
vertical and horizontal lines is the centre of the
flue hole (Fig. 38).

11. If using the internal fitting kit a 117mm (4

5

/8in)

diameter hole is required.

12. Cut a hole approximately 107mm (4

1

/4in)
diameter in the masonry for the 100mm (4 in)
diameter flue duct (Fig. 39). (Use of a core drill is
recommended. When using a core drill, it is
important to keep the drill level and square,
particularly with the wall onto which the boiler is to
be fitted).

13. Drill the anchorage holes 63mm (2

1

/2in) deep

to accept suitable wall plugs.

Fig. 34

Fig. 35

Fig. 36

Fig. 37

Fig. 38

Fig. 39

Maximum lengths for side flues using the standard telescopic flue kit

410mm (30, 40, 50)

410mm (30, 40, 50)

355mm (60, 70, 80) 355mm (60, 70, 80)

90mm (30/40/50 PF)
145mm (60/70/80 PF)

5.0 Installation

21

5.9 Side Flue Preparation

1. For both Left and Right Hand Flue - Measure
the distance from the wall to the nearest line
marked from the template. This will be known as
dimension X (Fig. 40).

2. Measure the thickness of the wall from the
inside. This will be known as Wall Thickness
(Fig 41).

3. To make up the total flue length, add 90mm

(30/40/50 PF) or 145mm (60/70/80 PF) to the

Wall Thickness + X dimension:

Total flue length =

Wall Thickness + X +

90mm (30/40/50 PF)

Wall Thickness + X + 145mm (60/70/80 PF).

NOTE: if total calculated flue length exceeds

500mm (19

5

/8in), a flue extension kit will be

required.

CUTTING THE FLUE

NOTE: If Wall Thickness + X is less than;

195mm (PF 50-40-30) or
140mm (PF 80-70-60),

it will be necessary to cut the components of
the flue to make up the appropriate size.

4. Take the Flue Duct and measure the
dimension below from the flared end. Cut the
waste off the plain end (Fig. 42).

Wall Thickness + X + 90mm (30-40-50 PF)
Wall Thickness + X + 145mm (60-70-80 PF)

5. Take the Flue Terminal Assembly and
measure from the terminal end the dimension
below (Fig. 43). Cut the waste off the plain end.

Wall Thickness + X + 50mm (30-40-50 PF)
Wall Thickness + X + 105mm (60-70-80 PF)

6. Measure the same amount from the flange end
of the Air Duct and cut the waste off the plain end
(Fig. 43a).

Wall Thickness +X + 50mm (30-40-50 PF)
Wall Thickness + X + 105mm (60-70-80 PF)

7. The cardboard support supplied in the flue
pack should be installed onto the flue tubes to
ensure the assembly is supported during cutting
(Fig. 44 & 45).

Wall Thickness + X + 90mm (30/40/50)

Wall Thickness + X + 145mm (60/70/80)

Wall

Thickness

X

Wall Thickness + X + 50mm (30/40/50)

Wall Thickness + X + 105mm (60/70/80)

Wall Thickness + X + 50mm (30/40/50)

Wall Thickness + X + 105mm (60/70/80)

Fig. 40

Fig. 41

Fig. 41a

Fig. 42

Fig. 43

Fig. 43a

Waste

Flue Duct

Flue Terminal Assembly

Air Duct

Wall Thickness

X

Total Flue Length

Waste

Waste

Cardboard

Support

Cut Line

Fig. 45

Fig. 44

Cardboard

Support

5.0 Installation

22

5.10 Fitting the Flue and Back Plate

1. NOTE: There are two options for fitting the
flue and back plate they are:

Method A - Fitting the flue and back plate as an
assembly (usually used where there are no side
clearance problems).

Method B - Pre-fitting the flue through the wall,
fitting the back plate to its position on the wall
and then connecting the two together (usually
used where side clearances are restrictive).

5.11 Method A

1. Remove the left or right hand air box blanking
plate, as appropriate, from the back plate air box
by releasing the three screws (Fig 46).

2. Rotate the turret to face the selected opening
(Fig. 47) and remove the side blanking cap by
pushing in and turning anti-clockwise to release
the bayonet fitting (Fig. 46).

3. Locate the flared end of the flue duct over the
bayonet fitting on the turret, taking care not to
damage the 'O' ring. Lock the flue in place by
pressing in and turning clockwise (Fig. 49).

4. Ensure that the 'O' ring seal is in position
against the sealing flange.

5. Fit the air duct over the flue duct and draw
towards the air box on the back plate. Engage
the bayonet slots of the air duct over the location
lugs of the back plate opening and press and
turn clockwise to secure the air duct to the air
box (Fig. 50).

6. In order to increase security of the flue, the
bayonet tags may be deformed to secure the
flue in position.

7. Take the flue terminal assembly and engage
on the flue and air ducts. Slide the flues together
to the desired flue length. Tape the outer duct
sections together with the tape provided
ensuring a good seal is made.

Fig. 46

Fig. 47

Fig. 49

Fig. 50

Turret

Air Box
Blanking Plate

Blanking
Cap

Flue Duct

Air Duct

5.0 Installation

23

5.11 Method A (Cont)

7. Engage the assembly into the hole previously
cut in the wall and slide into place.

8. Secure the assembly to the wall at the
previously drilled anchorage points with suitable
screws. Before finally tightening the screws,
check that the assembly is level (Fig. 51).

9. Make good between the wall and the air duct
inside and outside the building if the internal fitting
kit has not been used (Fig. 52).

10. The flue trim provided may be fitted if
required, to neaten the make-up around the
terminal (Fig. 53).

11. To fit the flue terminal trim:

a) The trim should be fitted once the flue is
secure.

b) Take the three edge clips from the kit and fit
them equi-spaced onto the inner flange of the trim
(Fig. 52a).

c) With the flanges towards the wall pass the trim
over the terminal. If required a bead of sealant
may be applied to the rear face of the trim.

d) Push firmly on the trim to ensure the edge clips
engage on the flue.

Fig. 53

Fig. 51

Fig. 52

Edge Clip

Flue Trim

Flue Trim

Fig. 52a

5.0 Installation

24

5.12 Method B

1. Remove the left or right hand air box blanking
plate, as appropriate, from the back plate air box
by releasing the three screws (Fig. 54).

2. Rotate the turret to face the selected opening
(Fig. 55) and remove the side blanking cap by
pushing in and turning anti-clockwise to release
the bayonet fitting (Fig. 54).

3.Locate the flared end of the flue duct over the
bayonet fitting on the turret, taking care not to
damage the ‘O’ ring. Lock the flue duct in place by
pressing in and turning clockwise (Fig. 57).

4. Engage the bayonet slots of the air duct over
the location lugs on the back plate opening and
press and turn clockwise to secure the air duct to
the back plate (Fig. 58).

5. Engage the flue and air ducts into the hole
previously cut in the wall and through holes in
other partitions (cupboards, walls etc.).

6. Secure the back plate to the wall at the
previously drilled anchorage points with suitable
screws. Before finally tightening the screws,
check that the assembly is level.

7. Take the flue terminal assembly and pass
through the cut hole from outside. Engage on the
flue and air ducts. Slide the flues together to the
desired wall thickness, tape the outer duct
sections together with the tape provided ensuring
a good seal is made.

8. In order to increase security of the flue, the
bayonet tags may be deformed to secure the flue
in position.

9. Make good between the wall and the air duct
inside and outside the building if the internal fitting
kit has not been used (Fig. 59).

10. The flue trim provided may be fitted if
required, to neaten up the make-up around the
terminal (Fig. 60).

5. To fit the flue terminal trim:

a) The trim should be fitted once the flue is
secure.

b) Take the three edge clips from the kit and fit
them equi-spaced onto the inner flange of the trim
(Fig. 59a).

c) With the flanges towards the wall pass the trim
over the terminal. If required a bead of sealant
may be applied to the rear face of the trim.

d) Push firmly on the trim to ensure the edge clips
engage on the flue.

Fig. 55

Fig. 54

Turret

Fig. 60

Fig. 59

Fig. 57

Fig. 58

Flue Duct

Air Duct

Air Box
Blanking Plate

Blanking
Cap

Edge Clip

Flue Trim

Flue Trim

Fig. 59a

5.0 Installation

25

5.13 Terminal Guard

1. When codes of practice dictate the use of
terminal guards, they can be obtained from most
plumbers and builders merchants nationwide.

2. When ordering a terminal guard, quote the
appliance name and model number.

3. There must be a clearance of at least 50mm
between any part of the terminal and the guard.

5.14 Fitting a Terminal Guard (Fig. 61)

1. Position the guard over the terminal on the
outside wall. Ensure the guard is equally spaced
about the terminal. Mark the fixing positions.

2. Drill and plug fixing the positions then secure
the guard to wall.

Fig. 61

5.0 Installation

26

5.15 Internal Fitting Kit

1. The internal fitting kit (available from
merchants free of charge quoting Baxi Part
N

o

. 236441) is suitable for walls between 100mm

(4in) and 285mm (11

3

/16in) in thickness.

2. TO INSTALL THE KIT - Mark the flue hole
centre as described in section 5.4 or 5.8. Cut a
hole in the masonry approximately 117mm (4

5

/

8

in) diameter for the internal fitting kit. The use of
a core drill is recommended. (When using a core
drill, it is important to keep the drill level and
square).

3. Measure the wall thickness and from this
dimension subtract 10mm (

3

/8in) (Fig. 62).

4. Remove the wall liner from its packing and
remove the end piece (Fig. 63).

5. Mark off the dimension, wall thickness - 10mm
(

3

/8in), measuring from the beaded end of the
duct and cut off the remaining length of the duct.
Ensure that the cut is square and reasonably
straight (Fig. 64).

Wall Thickness - 10

Wall Thickness

Fig. 62

Fig. 63

Fig. 64

5.0 Installation

27

5.15 Internal Fitting Kit (Cont)

6. Refit the end piece to the liner and open out to
the thickness of the wall. Seal the two pieces
together using the tape provided with the kit
(Fig 65).

7. Slide the assembled wall liner into the hole in
the wall until the tags stop against the inner wall
with the seam of the liner uppermost. Mark the
positions of the holes in the tags on the wall and
then rotate liner so that tags reveal marks
(Fig. 66).

8. Drill and plug the wall in these positions
(Fig. 67).

9. Rotate liner back until the tags align with the
holes drilled and secure it to the wall using
suitable screws (Fig. 68).

10. Make good between the edge of the liner
and the outside wall with cement mortar or a
similar substance, by reaching through the liner
and pressing the mortar between liner and the
outside brick work (Fig. 69). Make good between
the liner and the inside wall. Apply soap solution
to the ‘O’ ring inside the liner.

11. The rest of the installation may now proceed
as described.

Fig. 65

Fig. 66

Fig. 67

Fig. 68

Fig. 69

5.0 Installation

28

5.16 Fitting the Combustion Box

1. Offer up the combustion box to the back plate
and locate the rear bottom edge of the
combustion box onto the self locating support at
the base of the wall plate (Fig. 70).

2. Swing the top of the combustion box
backwards against the top air box (Fig. 71).

3. Engage the two retaining latches and secure
with the 'R' clip previously removed (Fig. 72).

Fig. 71

Fig. 70

Fig. 72

5.0 Installation

29

NOTE: The method of connection to the
electricity supply must facilitate complete
electrical isolation of the appliance.
Connection may be made via a fused double
pole isolator with a contact separation of at
least 3mm (

1

/8in) in all poles and serving the
appliance and system controls only. All cables
should be routed to avoid hot surfaces.

WARNING - T

HIS APPLIANCE MUST BE EARTHED.

4 core input cable for connection to the appliance
must be not less than 0.75mm

2

(24 x 0.2mm)
PVC grade to IEC 227 code 53 (heat resisting).
External controls and the appliance MUST be
supplied via the same isolator.

NOTE: Polarity of the appliance MUST be
correct otherwise the appliance will not
operate correctly.

or

b

r

g/y

w

br

b

gy

bk

w

y

y

or/bk

y/r

y/bk

r/b

or

or

g

w

bk

gy

br

b

Pump

N

Main Gas Valve

Pilot Gas Valve

Fan

Pressure Switch

Thermostat Sensor

Overheat
Thermostat

Control
Potentiometer
& Switch

Spark Electrode

N

N

N

External
Controls

S/L

L

230V

L

b

r

b

or

b

br

gy

w

y

bk

y

or

or

or/bk
or/bk

r/b

y/bk

y/r

w

PCB

Schematic

Wiring

Diagram

Pressure
Switch

Overheat
Thermostat

Control
Potentiometer
& Switch

Thermostat Sensor

Spark Electrode

Fan

Gas Valve

Key

br - brown b - blue
r - red w - white
bk - black or - orange
gy - grey y - yellow
g - green
g/y - green & yellow
or/bk - orange & black
r/b - red & blue
y/bk - yellow & black
y/r - yellow & red

5.17 Electrical Connections

5.0 Installation

30

5.18 Making the Electrical Connections

1. Remove the cover from the control box by
removing the 2 screws (Fig. 73).

2. Slide the box forward for easier access.

3. The terminal strips may be removed by
carefully pulling them forward. Connect the supply
cable and the pump cable to the terminal strips
(Fig. 75).

IMPORTANT - When installing in conjunction
with a thermal store or heat store please refer
to the store manufacturers installation
instructions when wiring the boiler.

4. The pump must be connected to the boiler
terminals.

5. A permanent live must be connected to the 'L'
terminal.

6. The switched live must be connected to the
'S/L' terminal.

7. Clamp the cables in the grips provided. Ensure
that the lengths of the supply cables are such that
the current carrying wires become taut before the
earth wires if the cable should pull out of the cable
clamp (Fig. 74).

8. Tuck the cables under the box and clip to the
wall where necessary. Make sure sufficient slack
is left to allow the box to slide forward for future
access.

9. A cable clip is provided in the base of the box.

Switched Live

Permanent Live

Neutral

Earth

Pump Earth

Pump Neutral

Pump Live

Fig. 73

Fig. 74

Fig. 75

5.0 Installation

31

5.19 Water Connections

1. The boiler has two side water connections, the
top connection being FLOW and the bottom
connection being RETURN (Fig. 75a).

2. It is essential that FLOW and RETURN pipes
are connected to the correct fittings.

3. The top flow connection incorporates the boiler
thermostat and overheat thermostat (Fig. 76).

4. A copper elbow, compression nut and olive are
provided in the kit for the return connection.

NOTE: Drain cocks should be fitted to all the
system's low points.

5. Take the boiler thermostat assembly and the
overheat thermostat and clip from the kit.

• Clip the boiler thermostat to the flow pipe

adjacent to the elbow.

• Engage the overheat thermostat in the clip and

fit to the flow pipe next to the boiler thermostat.

• Take the cable tie from the kit and use it to secure

the overheat thermostat clip. The cable tie must be

fitted diagonally so that it sits at both sides of the

ribs on the clip.

• Connect the electrical tags to the thermostats.

The overheat thermostat has the larger terminals.

• The thermostats have no polarity - either tag can go

on either terminal.

• Ensure that the area of the flow pipe to which

the thermostats are fitted is free of excess

solder and debris.

5.20 Pipe Routes

1. Ensure that any pipework is routed so as to
leave the boiler via the spaces at the rear of the
outer case, either at the top or at the bottom.

2. Pipes may be dropped down within the outer
case in the spaces between the back plate and the
combustion box.

NOTE: It is important that the pipework does
not interfere with the correct fitting of the outer
case and a space of 14mm clearance must be
left between any vertical pipes and the outer
sides of the back plate.

5.21 Gas Connection

1. Connection to the gas supply is RC1/2(1/2in
BSPT internal) located at the rear of the gas cock
(Fig. 78).

2. When connecting the gas feed pipe, the control
box may be pulled forward to give greater access.

Fig. 75a

Fig. 78

Fig. 76

Overheat
Thermostat

Flow Pipe

Thermostat Sensor

Orange Leads

Cable Tie

Fig. 77

Yellow Leads

6.0 Commissioning the Appliance

32

6.1 Commissioning the Appliance

1. Flush the whole system in accordance with
BS 5793 (see Section 3.1 Water Circulating
Systems). Check for water leaks.

2. Purge away air from the supply pipe at the gas
service cock. (BS 6891) (Fig. 79).

3. Ensure that the electrical supply is isolated.

4. Check the electrical supply for earth continuity,
polarity, short circuit and resistance to earth.

5. Turn the gas service cock anti-clockwise to the
ON position and check for gas soundness up to
the gas valve.

6. Loosen the pressure test point screw on the
right hand side of the gas control valve (there is
no need to completely remove this screw to
obtain a pressure reading) and connect a
pressure gauge.

7. Turn the boiler thermostat control knob fully
anti-clockwise to the OFF position marked 0
(Fig. 80).

8. Ensure that the electricity supply is turned ON
and set any external controls to the ON position.

9. Turn the boiler thermostat knob fully clockwise.

10. The fan will start running and after
approximately 10 seconds, the ignition spark will
commence.

11. The sparking will continue until the pilot light
is established (Fig. 81) and then the main burner
will light from the pilot flame.

12. Check that both the main burner and the pilot
are alight by observing through the viewing
window. The indicator lights should also be
illuminated.

13. Should this sequence not occur, then refer to
the fault finding section of these instructions.

NOTE: The pilot rate for this appliance is
factory set, sealed and therefore non­adjustable.

*

Overheat

Boiler On

Fan On

Pilot On

Burner On

Overheat Neon
Warning

17 3

Fig. 79

Fig. 80

Fig. 81

6.0 Commissioning the Appliance

33

6.1 Commissioning the Appliance (Cont)

1. From the table opposite check that the main
burner pressure is correct after the appliance has
been running for 10 minutes.

2. Check for gas soundness, with main burner
alight, using leak detection fluid.

3. If necessary, adjustment to main burner
pressure can be made by altering the regulator as
shown (Fig. 82).

4. To alter the burner pressure, turn the adjustment
screw in either direction until the required pressure
is obtained.

5. Turn the boiler thermostat to the OFF position
marked 0. Screw home the pressure test point
screw. Turn the boiler thermostat knob to the
required setting.

6. The boiler and system should be run and then
flushed and treated in accordance with
BS 7593:1992 and the flushing agent / inhibitor
manufacturers instructions. When all the air has
been removed from the water circuit, the pump and
radiators should be balanced to achieve the design
temperature drop across the system.

7. Make a final check for gas soundness and set
any timer control, room thermostats etc. to the
customer's specific requirements.

8. The boiler is protected by an integral frost-stat,
but if the boiler is not to be used for a long period
of time, the system should be drained.

NOTE: The frost thermostat operates even if
the boiler thermostat is in the OFF position and
it is necessary therefore, if the system is
drained, for the external electrical and gas
supplies to be isolated.

It is recommended that a label be affixed to the
appliance to draw attention to the fact that the
system has been drained.

WARNING - If the system is filled with very cold
water and the boiler lit, the action of the frost
protection thermostat will prevent the boiler
from shutting down before the water
temperature reaches 10°C.

9. Carefully read and complete all sections of the
“Benchmark” Installation, Commissioning and
Service Record Log Book that are relevant to the
appliance and installation. The details of the Log
Book will be required in the event of any warranty
work. The Log Book must be handed to the user
for safe keeping and each subsequent regular
service visit recorded.

Model

Input P Setting Pressure

kW Btu/h mbar in wg

30

Maximum 10.99 37, 500 16.0 +0.5 6.4 +0.2
Minimum 7.33 25, 000 8.0 +0.5 3.2 +0.2

40

Maximum 14.65 50, 000 16.0 +0.5 6.4 +0.2
Minimum 11.36 38, 750 10.0 +0.5 4.0 +0.2

50

Maximum 18.32 62, 500 16.0 +0.5 6.4 +0.2
Minimum 15.02 51, 250 11.5 +0.5 4.4 +0.2

60

Maximum 21.98 75, 000 16.0 +0.5 6.4 +0.2
Minimum 18.68 63, 750 11.5 +0.5 4.4 +0.2

70

Maximum 25.64 87, 500 16.0 +0.5 6.4 +0.2
Minimum 22.35 76, 250 12.16 +0.5 4.8 +0.2

80

Maximum 29.31 100, 000 16.0 +0.5 6.4 +0.2
Minimum 26.01 88, 750 9.5 +0.5 3.8 +0.2

Burner Pressure
Test Point

Regulator

Fig. 82

IMPORTANT: Solo 3 30 PF models

must not be set at minimum input when
installed with vertical flue systems.

7.0 Fitting the Outercase

34

7.1 Fitting the Outercase

1. The warning label may be removed unless the
boiler is to be fitted within a cupboard.

2. Taking the ready assembled outercase, the
front door of which has already been removed,
proceed as follows:

3. If the appliance is flued to the left or to the
right, remove the relevant infill panel by
removing the retaining clips and fixing screws
(Fig. 83).

4. Offer the outer case up to the hooks on the
top of the back plate (Fig. 85).

5. Ensure that the outer case is located over the
lower tabs on the back plate on both sides
(Fig. 86).

6. Using the two screws previously removed,
secure the outer case to the combustion box
(Fig. 84).

7. Replace the lower front door panel.

8. Instruct the user in the operation of the boiler
controls. Hand over the Users Operating,
Installation and Servicing Instructions and the
Log Book giving advice on the necessity of
regular servicing.

Fig. 83

Fig. 84

Fig. 85

Fig. 86

Infill Panel

8.0 Overheat Cut-off Device

35

8.1 Operation

1. The overheat cut-off device is of the manual
reset type and therefore it is important that the
user knows how to reset the control should it
ever cut out.

NOTE: Cut-out is indicated by illumination of
the neon light on the control box.

2. Remove the lower door panel by following the
sequence of diagrams (Fig 87).

3. To reset the boiler - Turn the boiler
thermostat control knob fully anti-clockwise to the
OFF position marked ‘0’ (Fig. 88). Wait ten
seconds, turn the control knob clockwise to the
required thermostat setting, the red neon goes
out, the boiler will start automatically.

4. No adjustment to the gas controls or main
thermostat are required.

5. If the overheat thermostat drops out
repeatedly, refer to the fault finding chart at the
rear of this booklet or consult a competent
service engineer.

Fig. 87

Fig. 88

1

2

3

*

Overheat

Boiler On

Fan On

Pilot On

Burner On

Overheat Neon
Warning

9.0 Annual Servicing

36

9.1 Dismantling the Boiler

1. To ensure its continued safe and efficient
operation, it is important that the appliance is
regularly serviced. ( For location of British Gas
service test point see Changing Components
section of these instructions).

2. Before servicing the boiler please read Section

1.3 Important Information.

3. After servicing, complete the relevant section of
the “Benchmark” Installation, Commissioning and
Service Record Log Book. This should be in the
possession of the user.

4. Isolate the electrical supply to the boiler.

5. Remove the outer case lower door panel by
following the sequence of diagrams (Fig. 89).

6. Remove the outer case from the boiler by
unscrewing the two screws and lift the case clear
(Fig. 90).

7. Release the four latches holding the
combustion box door (Fig. 91). Remove the
combustion box door by pulling forward (Fig. 93).

8. Release the 5-pin electrical plug connecting the
pressure switch and fan (Fig. 92). Withdraw the
fan assembly by pulling forwards from the top
edge (Fig. 93).

Fig. 89

Fig. 90

Fig. 91

Fig. 92

Fig. 93

1

2

3

9.0 Annual Servicing

37

9.2 Cleaning the Combustion Box

1. Remove the burner assembly by pulling it
forward (Fig. 94).

2. Lightly brush any dirt from the top of the burner
blades and ensure that the ports are free from
obstruction.

3. Remove the baffle retension clip (Fig. 93a).

4. Lift the baffles out of the heat exchanger
(Fig. 94).

9.3 Cleaning the Heat Exchanger

1. The heat exchanger may be cleaned by
insertion of a thin metal strip e.g. a hack saw
blade or steel rule, from above or below, taking
care not to damage any insulation.

2. Clean the front and rear fin sections and
ensure that any blockages are cleared.

9.4 Cleaning the Burner Injector

1. Remove the injector which is screwed into the
burner feed manifold (Fig. 95).

2. Examine and clean carefully, then replace
ensuring that the copper washer is in position.
Tighten the injector fully.

9.5 Cleaning the Pilot

1. Disconnect the spark electrode lead at the
electrode (Fig. 96).

2. Unscrew the electrode from the manifold and
withdraw the electrode (Fig. 96).

3. Remove the right hand side insulation carrier
bracket by releasing the screw. Remove the side
insulation (Fig. 94).

4. Release the screw securing the pilot hood and
remove (Fig. 96a).

5. Carefully remove the pilot injector (Fig. 96a).
Examine and clean it as necessary. Do not use a
wire or pin to clean the injector orifice.

6. Examine the sealing washer (Fig. 96a) and
replace if it is damaged in any way. Reassemble
in reverse order.

7. Replace all components in reverse order
ensuring that the flexible tubes from the fan unit to
the pressure switch are routed correctly and that
they are not kinked or flattened (96b).

8. Check that the seal to the combustion box door
is good.

9. Re-commission the boiler before use, checking
for gas soundness and ensuring all controls are
working correctly.

10. Complete the relevant section of the
“Benchmark” Installation, Commissioning and
Service Record Log Book and hand it back to the
user.

60, 70 & 80 PF
Models Only

Fig. 94

Fig. 93a

Fig. 95

Fig. 96

Fig.96a

Pilot Hood

Pilot Injector

Sealing Washer

Electrode

Baffles

Baffle Retension Clip

Flexible Tubes

Fig. 96b

10.0 Changing Components

38

Centre
Pin

Retaining
Rivet

Fig. 98

Fig. 99

Fig. 100

Fig. 101

Fig. 102

Fig. 103

10.1 Changing Components

1. When changing components ensure that the
gas and electrical supplies are isolated before the
work is started.

2. Before changing any components please read
Section 1.3 Important Information.

3. Remove the outer case lower door panel
(Fig. 98).

4. Remove the outer case from the boiler by
unscrewing the two screws and lift the case clear
(Fig 99).

10.2 Replacing the Circuit Board

1. Ensure that the electrical supply is isolated.

2. Remove the cover from the front of the controls
box (Fig. 100).

3. Release the mains cables from the cable
clamps and unplug the mains connection blocks
from the circuit board (Fig. 101).

4. Remove the screw retaining the thermostat
control panel and slide the circuit board from the
box.

5. Carefully withdraw the centre pin from the
retaining rivet which then allows the retaining rivet
to be removed. Remove the thermostat control
panel (Fig. 102). (On reassembling ensure the
control panel is located over the retaining rivet
body before inserting the centre pin.)

6. Disconnect the plugs from the sockets on the
circuit board (Fig. 103).

7. Replace new circuit board in reverse order
checking that the connections are correct as
shown in the diagram (See Electrical Connections
section 5.17 of these instructions) and that the
harness is retained in the strain reliefs.

1

2

3

British Gas Service
Test Point.

For use by B.G.
Personnel only

10.0 Changing Components

39

10.3 Ignition Electrode (Fig. 104)

1. Disconnect the spark electrode lead at the
electrode.

2. Unscrew the electrode from the manifold and
withdraw the electrode.

3. Replace the new electrode in reverse order,
ensuring that the sleeving is pushed over the end
of the electrode.

10.4 Gas Valve (Fig. 105)

1. Disconnect the inlet gas cock union.

2. Remove the cover from the front face of the gas
valve and remove the electrical connections from
the tags on the gas valve.

3. Disconnect the gas valve by unscrewing the
three screws on the top face of the gas manifold. If
access to these screws is dificult the valve can be
removed with the manifold.

4. Remove the gas valve being careful not to
damage the gasket.

5. Fit the new gas valve by re-assembling all
components in reverse order, ensuring that the
gasket is properly positioned.

10.5 Thermostat Sensor (Fig. 106)

1. Disconnect the two electrical tags from the
sensor.

2. Prise the clip and sensor off the flow manifold.

3. Clip the new sensor to the manifold and
reconnect the wires. Either wire can be connected
to either spade terminal - there is no polarity.

10.6 Over-Heat Thermostat

(Figs.106 & 107)

1. Disconnect the two electrical tags from the
overheat thermostat.

2. Cut off the cable tie securing the clip to the pipe.

3. Prise the clip and thermostat from the pipe,
noting its position. Disengage the thermostat from
the clip.

4. Engage the new thermostat in the clip. Prise the
clip over the flow pipe ensuring it is positioned as
previously. Take the cable tie supplied with the
new overheat thermostat and use it to secure the
clip. The cable tie must be fitted diagonally so that
it sits at both sides of the ribs on the clip.

5. Connect the two electrical tags to the terminals
on the overheat thermostat - either wire can be
connected onto either terminal - there is no
polarity.

Fig. 104

Fig. 105

Electrode

Fig. 106

Fig. 107

Overheat
Thermostat

Flow Pipe

Thermostat Sensor

Orange Leads

Yellow Leads

Cable Tie

British Gas Service
Test Point.

For use by B.G.
Personnel only

10.0 Changing Components

40

10.7 Changing Components (Cont)

1. To change Fan - Pressure Switch - Burner ­Burner Injector - Pilot Burner Injector - Gas
Manifold, proceed as follows:-

2. Release the four latches holding the combustion
box door (Fig. 108). Remove the combustion box
door by pulling forward (Fig. 110).

3. Release the 5-pin electrical plug connecting the
pressure switch and fan (Fig. 109). Withdraw the
fan assembly by pulling forwards from the top edge
(Fig. 110).

10.8 Fan (Fig. 111)

1. Disconnect the two sensing tubes from the
venturi situated on the fan.

2. Disconnect the 2 fan wires from the connection
on the electrical plug. Remove the 3 screws
securing the fan to the fan hood.

3. 30-40-50 models only - Remove the two screws
securing the fan outlet flange to the fan and
remove. Clean all sealing mastic from the outlet
flange.

4. Fit the outlet flange onto the new fan, fix with the
2 screws and seal the outside gap between the fan
body and the outlet fan with the mastic provided.

5. 60-70-80 models only - When fitted, unbend the
tabs securing the fan outlet restrictor to the outlet
flange on the original fan.

6. Fit the outlet restrictor to the new fan outlet
flange. Bend the tabs over the flange to secure the
restrictor.

7. Fit the new fan and re-assemble all components
in reverse order of dismantling, reconnect the new
fan wires into the connections on the electrical plug

- either wire can be connected into either
connection.

10.9 Pressure Switch (Fig. 112)

1. Disconnect sensing tubes noting their positions.

2. Remove the screw securing the pressure switch
to its bracket and unhook the pressure switch.

3. Disconnect the 3 electrical terminals from the
pressure switch. Note the position of the tags
before removal and reconnect in correct order.

4. Fit new pressure switch and re-assemble all
components ensuring that the flexible tubes from
the fan unit to the pressure switch are routed
correctly and that they are not kinked or flattened
(Fig. 112b). Ensure that the electrical terminals are
connected to their correspondingly marked tags.

Fig. 108

Fig. 110

Fig. 111

Fig. 112

Outlet Flange
(30-40-50 Models shown)

Green

Fan

Fig. 109

Sensing Tubes

Black

White

Flexible Tubes

Fig. 112b

10.0 Changing Components

41

10.10 Burner (Fig. 113)

1. Remove the burner assembly by pulling it
forward.

2. Fit new burner and re-assemble all components
in reverse order of dismantling.

10.11 Burner Injector (Fig. 114)

1. Release and remove the burner injector which
is screwed into the burner feed manifold.

2. Fit the new burner injector ensuring that the
copper washer is in position. Tighten the injector
fully.

3. Re-assemble all components in reverse order.

10.12 Pilot Burner Injector (Fig. 115)

1. Remove the right hand side insulation carrier
bracket by releasing the screw. Remove the side
insulation panel.

2. Release the screw securing the pilot hood and
remove. Carefully remove the pilot injector. Fit the
new pilot injector ensuring the new sealing washer
is in position. Tighten the injector fully.

3. Re-assemble all components in reverse order.

10.13 Gas Manifold (Fig. 116)

1. Remove the right hand side insulation carrier
bracket by releasing the screw. Remove the side
insulation panel (Fig. 113).

2. Remove the two screws securing the manifold
from the inside of the combustion box and slide
the manifold forward from under the two rear
locating studs.

3. Remove valve and ancillary components from
manifolds as necessary.

4. Replace all ancillary components onto manifold
and replace manifold by sliding rear edge
backwards under the two rear locating studs and
securing from inside the combustion box using the
two screws previously removed. Ensure that the
sealing gasket is properly positioned and
undamaged.

60, 70 & 80 PF
Models Only

Fig. 113

Fig. 114

Fig. 115

Fig. 116

Pilot Hood

Pilot Injector

Sealing Washer

11.0 Fault Finding

42

START

Replace fan

Replace harness

Replace pressure

switch

Replace fan

Replace

thermostat

Does fan run ?

Is

there a clear

constant spark at

the electrode ?

Change

potentiometer

Is

there mains voltage

at S/L input ?

Is

there mains voltage

at Pump L output ?

Check fuse on

circuit board

Check pump wiring

Note: This can occur if

the boiler has

overheated

Reset by turning

control knob OFF, wait

10 seconds then turn

ON

Does

lockout light

go out ?

Is
"Fan On"
light on ?

Check control knob

is turned on

Check that the wires
are connected to the

thermostat sensor

Check that the fan &

pressure switch plug is

connected

Is there

continuity between

C & NC terminals

on the pressure

switch ?

Check pressure switch

pipes for leaking or

blockage

Note: Under cold

conditions fan run up

time may exceed

1 min

Ensure external

controls are calling

for heat

Does pump run ?

Is

"Pilot On"

light on ?

Is

lockout light

on ?

Is

"Boiler On"

light on ?

Is

there mains voltage

at P/L input ?

Is

there mains at

the fan

connection ?

Is there

continuity across

the overheat
thermostat ?

YES

NO

YES

YES

YES

YES

YES

NO

YES

YES

NO

NO

NO

NO

NO

YES

YES

YES

NO

NO

NO

NO

YES

NO

No continuity - change

sensor

Check continuity

across pilot solenoid

(1.5 K OHM)

No continuity - change

pilot solenoid

Check continuity

across sensor

(1 M OHM at 20

o

C)

Investigate

pump

Change PCB

No continuity

across fuse,

change fuse

YES

YES

Change PCB

Check & clean

electrode. Check gap &

lead

YES

Check external

wiring

NO

Check Potentiometer

(see table)

Before starting FAULT FINDING carry out
preliminary electrical system checks i.e.
Earth Continuity, Polarity, Short Circuit
and Resistance to Earth.

11.0 Fault Finding

43

Replace the gas

valve

Replace PCB

Boiler satisfactory

Set pressure

regulator

Does

the pilot burner

light ?

Does

the main burner

light ?

Does

the boiler shut

down when the water

flow reaches

80-84oC ?

Does

pump run

on ?

Is

"Burner On"

light on ?

Are live &

neutral reversed ?

Indicator light inside

box will be lit

Check pilot flame

for correct size

Check & clean

electrode. Check spark

gap. Check electrode

lead

Check there is

20mbar gas pressure

at the inlet to gas valve

Check there is

20mbar gas pressure

at the inlet to gas valve

Check the pilot injector is

not blocked, partially
blocked or damaged

Check there is

20mbar gas pressure

at the inlet to gas valve

Is

there the

correct burner

pressure at the test

point ?

YES

YES

YES

YES

YES

NO NO

NO

NO

NO

Check pilot injector is

not blocked

Check main injector

is not blocked

Warning

It is important that both the air and flue ducts are
cut to their correct lengths also ensure that the
flue duct is fully engaged.

Failure to comply with the recommended fitting
instructions will adversly affect the operation of
the appliance.

Check pilot flame

size

YES

YES

YES

YES

Check pilot hood
position and pilot

air flow

Check continuity

across mains solenoid

(5 K OHM)

Change gas valve

NO

Change PCB

YES

Testing Potentiometer

Three Pin Connector

Set multimeter to the 2 M OHM
scale. Turn potentiometer to the
OFF position, connect the
multimeter leads to the blue/red wire
and centre black/yellow wire of three
pin connector.

The reading on the multimeter
should indicate approx 1 M OHM,
switch potentiometer to the ON
position, the reading on the
multimeter should be approx 1 M
OHM. Slowly turn potentiometer
knob to the FULL ON position, the
reading on the multimeter should
decrease, proportionally down to 0
OHMs.

Connect multimeter to centre
black/yellow wire and red/yellow
wire, turn potentiometer knob to fully
OFF position, reading on multimeter
should be 0 OHM. Switch
potentiometer to ON position, slowly
turn potentiometer knob to the fully
ON position, the reading on
multimeter should increase
proportionally to 1 M OHM, turn
potentiometer off. Reading on
multimeter should indicate 0 OHM.

Two Pin Connector

Check potentiometer is in OFF
position.

Set multimeter to continuity, connect
multimeter leads to both
potentiometer leads. Turn
potentiometer to the on position, the
multimeter's audible alarm should
now be sounding to indicate
continuity.

Replace PCB

Replace sensor

Check

Potentiometer

(see table)

12.0 Short Parts List

44

59

54

90

100

34

33

35

77

83

64

84

98

94

69

42

53

91

12.1 Short Parts List

35

Key Description Model G.C. Manuf'rs
N

o

N

o

Part N

o

53 Burner 30-40-50 364 878 231708

60-70-80 364 879 231709

59 Burner Injector 30 364 880 231354

40 364 881 231355

50 364 882 228104

60 364 873 231776

70 E01 623 239619

80 364 981 231777

54 Pilot Kit All models 170 558 236142

100 Electrode Lead All models 364 745 225826

90 Control Knob All models 364 886 230981

42 Viewing Window Kit All models 364 588 224183

34 Insulation R.H. All models 364 889 230653

33 Insulation L.H. All models 364 890 230652

35 Retaining Clips All models 364 891 230817

77 Gas Valve All models E24 690 245122

98 Overheat Thermostat All models E03 921 241792

84 Fuse All models 364 892 231402

64 Fan 30-40-50 E26 180 246051

60-70-80 E26 213 246052

94 Thermostat All models 379 030 246064

83 PCB All models 379 031 231711

91 Potentiometer All models 379 960 231252

69 Pressure Switch 30, 40, 50 E26 186 246053

60, 70 E26 219 246054

80 E26 221 246055

13.0 Notes

45

13.0 Notes

46

Baxi UK Limited manufacture a comprehensive
range of products for the domestic heating market

Gas Central Heating Boilers
(Wall, Floor and Fireside models).

Independent Gas Fires.

Renewal Firefronts.

Gas Wall Heaters.

Solid Fuel Fires.

If you require information on any of these products,
please write to the Sales Department.

47

Baxi UK Limited

Brownedge Road

Bamber Bridge Preston

Lancashire

PR5 6SN

www.baxi.com

After Sales Service

08706 096 096

Technical Enquiries

08706 049 049

Comp No244096 - Iss 5 - 4/01