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Baxi Bermuda
Inset 2 Boiler 50/4
Fireside Gas Central Heating Unit
Comp N° 238983 - Issue 4 - 10/99
Installation and
Servicing Instructions
Page 2
Natural Gas
Baxi Bermuda Inset 2 Boiler 50/4
G.C. No. 44 075 01
For use with the following firefronts:
Baxi Bermuda Inset 2 TS
G.C. No. 37 075 12
Baxi Bermuda Inset 2 BS
G.C. No. 37 075 13
Baxi Bermuda Inset 2 FS
G.C. No. 37 075 15
Baxi Bermuda Inset 2 KS
G.C. No. 37 075 14
Baxi Bermuda Inset 2 TS Deluxe
G.C. No. 37 075 28
Baxi Bermuda Inset 2 BS Deluxe
G.C. No. 37 075 29
Baxi Bermuda Inset 2 FS Deluxe
G.C. No. 37 075 30
Baxi Bermuda Inset 2 KS Delux
G.C. No. 37 075 31
Baxi 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.
Baxi is also the largest manufacturing partnership in the
country. Everyone who works at the company has a
commitment to quality because, as shareholders, we know
that satisfied customers mean continued success.
We hope you get a satisfactory service from Baxi. If not,
please let us know.
Baxi is a BS-EN ISO 9001
Accredited Company
Contents - Page 3
Section
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Introduction
Technical Data
System Details
Water Circulating Systems
Treatment of Water Circulating Systems
Pipework
System Controls
Fully Pumped System
Overheat Kit & Sealed Systems
Storage Systems
Pumped Heating & Gravity Hot Water
Site Requirements
Builders Opening
Location
Fireplace Opening & Surround
Frame Extension Kit
Flue
Ventilation
Gas Supply
Electrical Supply
Installation
Initial Preparation
Right Hand Water Connections
Connecting the Sensing Pipe
Siting the Boiler
Securing the Boiler
Water Connections
Fully Pumped Systems
Overheat Thermostat
Pumped Heating & Gravity Hot Water
Gas Connection
Electrical Connection
Making the Electrical Connection
Overheat Thermostat
Flue Connection
Completion
CommissionIng the Appliance
Annual ServicIng
Annual Servicing
Removal of Firefront
Removal of Controls
Cleaning the Lint Arrestor
Cleaning the Burner & Main Injector
Cleaning the Pilot/A.S.D. Assembly
Cleaning the Heat Exchanger
Changing Components
Changing Components
Removal of Firefront
Lint Arrestor
Suppression Capacitor
Thermostat
Piezo Igniter Unit
Removal of Controls
Gas Valve
Burner & Main Injector
Pilot/A.S.D. Assembly
Ignition Lead
Fault Finding
Short Parts List
Page
4
5
6
9
12
18
19
22
26
28
1.0 Introduction - Page 4
The boiler meets requirements of Statutory Instrument
“The Boiler (Efficiency) Regulations 1993 N° 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.
“Benchmark” Log Book
As part of the industry-wide “Benchmark” initiative 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.
1.1 Description
1. The Baxi Bermuda Inset 2 is a combined central heating
boiler and gas fire designed for installation within a builders
opening in the living space of a dwelling.
2. The firefront is intended for hearth mounting.
3. These instructions relate to the central heating boiler
section of the appliance (Fig. 1).
4. The boiler is range rated, with outputs as shown:
5. The appliance is preset at its MIDRANGE heat input rate
and is designed for use on NATURAL GAS only. The boiler
is suitable for fully pumped and pumped central heating with
gravity hot water systems.
6. Sealed System applications require an optional overheat
thermostat kit.
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 l.S. 813
“Installation of Gas Appliances”.
2. The installation must be carried out by a CORGI
Registered Installer or other competent person and be in
accordance with the relevant requirements of Gas Safety
(Installation and Use) Regulations, the Building Regulations
(Scotland) (Consolidation), the Local Building Regulations,
the Current I.E.E. Wiring Regulations and the bye laws of the
Local Water Undertaking. Where no specific instructions are
given, reference should be made to the relevant B.S.
CODES OF PRACTICE.
3. All systems must be thoroughly flushed and treated
with inhibitor (see section 3.2).
1.3 B.S. Codes of Practice
2.0 Technical Data - Page 5
Bermuda Inset 2 Boiler 50/4
The Boiler is for use with Natural Gas only.
Inset 2 50/4 hydraulic resistance
SEDBUK Declaration For Inset 2 50/4
The seasonal efficiency (SEDBUK) is 72 %
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.
Heat Input
kW
Btu/h
Heat Output
kW
Btu/h
Burner Pressure
mbar
in wg
Water Content
litres
gallons
Thermocouple
Output
Gas Connection
Water Connections
Electricity Supply
Controls
Gas Rate
(after 10 mins)
Max
18.79
64,100
Max
14.65
50,000
Max
17
6.8
Max
1 6
0.35
9.5 - 11 5mv
Rc ½ (½ in BSPT)
3 x 1 in BSP
230V ~ 50Hz
External fuse - 3 Amp
Appliance Rating - 4.8 watt
Multi-functional gas valve, mechanical thermostat,
thermocouple with permanent pilot & atmospheric
sensing device
1.8m3/h
(63.57ft3/h)
Mid
17
58,070
Mid
13.19
45,000
Mid
14
5.6
Min
15.2
51,850
Min
11.72
40,000
Min
11
4.4
Lifting Weight
Dimensions
Flue Diameter
mm
in
Heat Exchanger
Low Head
mm
in
Water Content Fully pumped or pumped heating with gravity hot
32.1 kg (70.7 Ibs)
Height
Width
Depth
125
5
Cast Iron
(Min)
1000
393/
8
water. Sealed system with optional overheat
thermostat
516mm
440mm
368mm
3.0 System Details - Page 6
3.1 Water Circulating Systems
1. The appliance is suitable for open vented systems which
are either fully pumped or pumped central heating with
gravity domestic hot water.
2. An optional overheat thermostat kit is available where
additional control protection is required and for sealed
system applications. This must not be used on gravity
systems.
3. The following conditions should be observed at all
times:
• The static head must not exceed 30m (100ft)
of water.
• The boiler must not be used with a direct
cylinder.
• Drain cocks should be fitted to all system low
points.
• All gas and water pipes and electrical wiring
must be installed in such a way that they do
not restrict the servicing of the boiler.
• Position isolating valves as close as possible
to the circulating pump.
3.2 Treatment of Water Circulating Systems
For optimum performance after installation, this boiler and its
associated central heating system must be flushed in
accordance with the guidelines given in BS7593: 1992
“Treatment of water in domestic hot water central heating
systems”. This must involve the use of a proprietary
cleanser, such as BetzDearborn’s Sentinel X300 or X400, or
Fernox’s Superfloc.
Full instructions are supplied with the products, but for
immediate information please contact BetzDearbom (0151
420 9563) or Fernox (01799 550811).
For long term protection against corrosion and scale, after
flushing it is recommended that an inhibitor such as
BetzDearborn’s Sentinel X100, or Fernox’s MB-1 or Copal is
dosed in accordance with the guidelines given in
BS7593:1992.
Failure to flush and add inhibitor to the system will
invalidate the appliance warranty.
It is important to check the inhibitor concentration after
installation, system modification and at every service in
accordance with the manufacturer’s instructions. (Test kits
are available from inhibitor stockists.)
For information or advice regarding any of the above contact
the Baxi Helpline.
3.0 System Details - Page 7
3.3 Pipework
1. The sizes of the flow and return pipes from the boiler
should be determined by normal methods according to the
requirements of the system.
2. It is recommended that the system is designed for an
11°C (20° F) drop in temperature across the system.
3.4 System Controls
1. For optimum operating conditions, the system in which
the appliance is installed should include a control system.
2. Such a system would comprise a timer control and a
separate room and/or cylinder thermostat as appropriate.
3. The boiler should be controlled so that it operates on
demand only.
4. It is not economical to rely on the boiler thermostat to
control operation of the system.
3.5 Fully Pumped System (Fig. 3)
1. The sizes of the system pipes should be determined by
normal methods.
2. The open vent pipe should be a minimum of 22mm and
must rise continuously to a point above the teed and
expansion tank.
3. The flow pipe from the boiler may form part of the vent
pipe. No part of the open vent should contain a valve.
3.0 System Details - Page 8
3.6 Overheat Kit & Sealed Systems
1. An overheat thermostat kit is available to facilitate the
installation of a Bermuda Inset 2 boiler to systems
incorporating a combined feed and vent and to flats and
dwellings where the building design prevents the boiler vent
pipe rising continuously to the feed and expansion tank.
(This must not be used on gravity systems.) Baxi Part N°
234885.
2. The boiler can be applied to a sealed system with the use
of the overheat kit.
3. Information regarding the application of the overheat
thermostat is included with the kit.
3.7 Storage Systems
1. For information regarding the use of a Bermuda Inset 2
boiler with a storage system, contact the appropriate storage
system manufacturer.
3.8 Pumped Heating & Gravity Hot Water (Fig. 4)
1. The sizes of system pipes should be determined by
normal methods.
2. The gravity flow pipe should rise vertically as close as
possible to the boiler, avoiding sharp bends and tight
elbows.
3. The open vent pipe should be a minimum of 22mm and
must rise continuously to a point above the feed and
expansion tank.
4. The flow pipe from the boiler may form part of the vent
pipe.
5. No part of the open vent should contain a valve.
6. The brass injector tee must be fitted to the boiler return
on all systems incorporating a gravity circuit.
7. The circulating head should not be less than 1 m (3ft)
with a maximum horizontal run of 3m (10ft) when using
28mm pipes. Smaller pipe sizes and longer horizontal runs
are acceptable with suitably increased circulating heads.
8. The gravity circuit should be designed with a minimum of
restriction, avoiding possible air traps and long horizontal
runs.
9. The system should be designed to prevent gravity
circulation in the heating system when the pump is not
running.
4.0 Site Requirements - Page 9
4.1 Builders Opening (Fig 5)
1. The boiler unit is designed to fit within a standard builders
opening, the minimum dimensions of which are as shown.
Height 584mm (23in)
Width 584mm (23in)
Depth 375mm (14¾in)
2. The opening should be soundly constructed of brick, precast concrete or be a proprietary builders opening.
3. The base of the opening should be sound and noncombustible and must be flat and level.
4. The base of the builders opening should be at the same
height as the finished level of the hearth.
IMPORTANT: If a false chimney breast is intended to
house the boiler, a simulated builders opening, within
the breast, must be provided.
5. The builders opening must not communicate with voids,
pipe ducts or spaces other than the room in which the
appliance is situated.
4.2 Location
1. The appliance must be installed in the living space of a
dwelling.
2. Restrictions to the siting of the appliance are covered by
BS 5546. The appliance may not be installed in bathrooms,
shower rooms, bedrooms or bed sitting rooms.
4.3 Fireplace Opening & Surround
1. If a fireplace surround is to be used, it must be centrally
placed and have opening sizes and a vertical flat area as
detailed in the Installation and Servicing Instructions for the
fire.
4.4 Frame Extension Kit
1. If the depth of the builders opening is less than the
375mm minimum specified, it can be increased by the use of
the Frame Extension Kit.
2. Kit N° 234887 is suitable for use with Inset 2 TS, BS and
FS models.
For Inset 2 KS, Kit N” 239341 must be used.
3. Full installation details are included in the kit.
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