Worcester Bosch Highflow 3.5 RSF User guide

....-- ~ ~ ~ORCESTER--.
Highflow 3.5 RSF
ROOM SEALED FANNED FLUE MODEL
FLOOR STANDING COMBINATION BOILER FOR CENTRAL
HEATING
AND MAINS FED DOMESTIC HOT WATER
INSTALLATION AND
SERVICING INSTRUCTIONS
GC NUMBER 41 311 40
BOILER OUTPUT
To Hot Water
Maximum 23.4 kw (80,000 Btu/h)
To Central Heating
Minimum 8.8 kW (30,000 Btu/h)
Maximum 23.4 kW (80,000 Btu/h)
IMPORTANT: THIS APPLIANCE IS FOR USE WITH NATURAL GAS ONLY
THESE INSTRUCTIONS APPLY IN THE UK ONLY
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER OR AT THE GAS METER
...__ _____ :::. ~ .rwoRCESTER _____ ...
Bosch Group

CONTENTS
INSTALLATION REGULATIONS AND TECHNICAL DATA
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Section 8
Section 9
Section 9.1
Section 9.2
Section 9.3
Section 10
Section 11
Section 12
Section 13
Section 14
Section 15
Section 16
Section 17
Section 18
Section 19
Section 20
General Information
Siting the Appliance
Removal of Cabinet
System Considerations
Air Supply - Horizontal Flues
Terminal Position - Horizontal Flue
Air Supply - Vertical Flue
Connection of Primary and Secondary Vertical Flues
Installing the Appliance - General
Rear Horizontal Flue Outlet
Vertical Flue Systems
Pre-plumbing of the Appliance
Completion of the Installation
Sealed Primary System - Open Vent Secondary System
Open Vent Primary System ~ Mains Feed Secondary System
Mains Feed Domestic Hot Water Supply (Secondary)
Electrical
Commissioning the Appliance
System Guidance and Bypass Adjustment
Users Instructions
Routine Cleaning and Inspection
Replacement of Parts
Short Parts List
Fault Finding Chart
INSTALLATION REGULATIONS
The installation of this appliance must be in accordance with the relevant requirements of the Gas Safety (Installation and
Use) Regulations, local Building Regulations, Building Standards (Scotland) (Consolidation), current lEE wiring
regulations and bye laws of the local water undertaking. It should be in accordance with the relevant recommendations of
the following British Standards and Codes of Practice: BS 6798:1987, BS 5449:1:1990, BS 5546:1:1990, BS 5440:1:1990,
BS 5440:2:1989 and BS 6891.
Gas Safety
(Installation and Use) Regulations 1984: It is the law that all gas appliances are installed by a competent
person, in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution. It is in
your interest, and that of safety to ensure compliance with the law.
The manufacturers notes must not be taken, in any way, as overriding statutory obligations.
TECHNICAL DATA NOTE: THE DATA PLATE IS POSITIONED INSIDE THE APPLIANCE AT THE FRONT LEFT
HAND SIDE.
Table 1
NOMINAL BOILER RATINGS (10 minutes after lighting)
BURNER SETTING
MODE
OUTPUT INPUT PRESSURE GAS RATE
kW
(Btu/h) kW
(Btu/h) m bar (in. wg)
m3 /h ift'ih I
8.79 (30000) 12.0 (40955) 2.2 (0.88) 1.11 (39.4)
11.0 (37545) 14.7 (50170) 3.2 (1.28) 1.36 (48.3)
HEATING 13.0 1443701 17.1 (58360) 4.4 (1.76) 1.59 (56.2)
RANGE 15.0 151195) 19.6 (66555) 5.8 (2.32) 1.81 (64.0)
17.0 (58020) 21.9 (74745) 7.3 (2.92) 2.03 (71.9)
19.0 (64845) 24.2 (82595)
9.1
(3.64) 2.25 (79.5)
23.44 (80000) 29.3
(1 00000) 14.3 (5.72) 2.72 (96.2)
DOMESTIC 23.44 (80000) 29.3
(1 00000) 14.3 (5.72) 2.72 (96.2)
HOT WATER
Note: The pressure test point is located on the gas valve (See fig. 31a).
2

Table 2
SPECIFICA nONS
HEATING FLOW
28mm COPPER TUBE
HEATING RETURN
28mm COPPER TUBE
SAFETY VALVE
22mm COPPER TUBE
COLD FEED
22mm COPPER TUBE
COLD WATER MAINS IN 15mm COMPRESSION -SUPPLIED
DOMESTIC WATER OUT
22mm COPPER TUBE
GAS INLET 22mm COPPER TUBE
HEIGHT
860mm (33.9in)
WIDTH
550mm (21.6inl
DEPTH
600mm (23.6in)
WEIGHT 95kg (2101b)
empty- 147kg (3241b) full
PRIMARY CAPACITY 48 litres (10.6 gal)
*MAXIMUM STATIC HEAD
25m (81ft.)
*MINIMUM STATIC HEAD 1000mm (39in)
CIRCULATING PUMP
Grundfos 15-60
EXPANSION VESSEL 12 litres charged 0.5 bar
OUTPUT TO HEATING MAXIMUM 23.4kW (80,000 Btu/h)
OUTPUT TO DOMESTIC HOT WATER 23.4kW (80,000 Btu/h)
CH CONTROL THERMOSTAT- MAX. TEMPERATURE Nominally 82°C (180°F)
DOMESTIC HOT WATER FLOW
RATE (35°C RISE) Nominally 9.6 litres/min + 15% (2.1 gal/min)
MAXIMUM DOMESTIC HOT WATER FLOW RATE Nominally 15 litres/min (3.3 gal/min) ±15%
* Appliance static heads are measured from the top of the casing to the highest point of the system (See Fig_s. 24. and 25)
Table 3
HORIZONTAL VERTICAL
FLUE DETAILS- See Notes Below REAR FLUE PRIMARY FLUE
WALL OR
CEILING- HOLE DIAMETER FOR AIR DUCT 125mm (Sin) 125mm (Sin)
WALL HOLE DIAMETER FOR SEALING RING 150mm (6in)
MINIMUM FLUE LENGTH- STANDARD FLUE KIT 100mm (4in) 1557mm (61.3in)
MAXIMUM FLUE LENGTH- STANDARD FLUE KIT 1
OOOmm (39in) 2000mm (73in)
FLUE LENGTHS WITH EXTENSION KIT 1
001 to 2000mm
2001 to 3000mm
(39 to 73in) (79
to 118in)
If a flue extension is required (See Section 9) it may be obtained from Worcester Heat Systems Ltd. ONE EXTENSION
FLUE KIT ONLY MAY BE USED PER APPLIANCE. Part No. ZAGAS066
Table 4
AVAILABLE PUMP HEADS
HEATING OUTPUT HEAD MIN. FLOW RATE OPTIMUM
kW Btu/h METRES
FEET
LITRES/MIN.
GALUMIN. TEMPERATURE RISE
8.8 (30,000)
5.1
16.6
8.41
1.89
11
(37,500) 4.7 15.5
10.51
2.36
13
(44,350) 4.3 14.1
12.42 2.79 15°C between
15
(51,200) 3.8 12.6 14.33 3.22
heating flow and return
17
(58,000) 3.3 10.9 16.24 3.65
19
(64,800) 2.2 7.2 18.15 4.08
23.4 (80,000) 1.5 5.0 22.35 5.02
3

1. GENERAL INFORMATION
IMPORTANT: Although the appliance includes the facility
to instal a sealed primary water system and feed the sec-
ondary system via the mains supply, only one of these
can be used, i.e. the system arrangement must be one of
the following:
(i) Sealed primary and open vented (i.e. cistern feed)
secondary (Section 10) or
(ii) Open vented primary and mains feed secondary
(Section 11) or
(iii) Open vented primary and open vented (i.e. cistern
feed) secondary.
FOR FURTHER ADVICE CONTACT WORCESTER HEAT
SYSTEMS LTD.
1. HIGHFLOW 3.5 RSF INCORPORATES
(a) An induced draught fan, a low thermal capacity heat
exchanger having a maximum heat output of
23.4kW (80000 Btu/h).
(b) Either a horizontal (rear outlet) or vertical fanned
flue system -to order.
(c) A standard duct kit for horizontal flue lengths from
100mm {4in) to 1000mm {39in). (An extension duct
kit from 1001 mm (39in) to 2000mm {79in) maximum
length is available as an option).
A standard duct kit for vertical flues, complete with
diverter intended for installation within a roof space.
The kit will enable the diverter to be installed be~
tween 1557 (61.3in) and 2000mm (79in) above the
appliance top outlet. (An extension duct kit from
2001mm (59in) to 3000mm {118in) is available as an
option).
(d) A heatbank having a nominal capacity of 45 litres
(10 gallons) of circulating primary hot water posi-
tioned inside the appliance. A copper finned water
to water heat-exchanger is fitted into the heatbank.
Secondary supply domestic hot water passes
through the heat exchanger.
{e) A diverter valve to direct the boiler output either to
domestic hot water or central heating as required.
(f) A circulating pump.
(g) A multifunctional HIGH/LOW gas valve and elec-
tronic control system to control individually the
domestic hot water and central heating. The system
provides automatic ignition.
(h) Boiler and hot water temperature control thermo-
stats providing control for central heating and dom-
estic hot water.
(j) A User/s Operating Switch for selection of water only
or heating and water. A programmer kit is available
as an optional extra.
(k) An expansion vessel, pressure gauge, pressure relief
valve and auto air vent to enable the primary circuit
to be connected to a sealed water system.
{I) An electronic pump delay control board which en-
ables the pump to run on for a period of about 5 min-
utes after each operating cycle.
2. INSTALLATION WARNING:
GREAT CARE MUST BE TAKEN TO ENSURE THAT
NO FOREIGN MATTER IS LEFT IN THE WATER
SYSTEM. THIS COULD CAUSE DAMAGE TO THE
APPLIANCE.
3. NATURAL GAS SUPPLY
The boiler requires 2.72m'/h (96.2ft'/h) of gas. Meter and
supply pipes must be capable of delivering this quantity of
gas
in addition to the demand from any other appliances
in tho house. The meter outlet governor must ensure a
nominal pressure of 20 mbar (Bin wg) at the appliance,
equivalent to a pressure of about 18:5-19
mbar at the gas
valve. The complete installation, mcluding the meter,
should be inspected and tested for soundness and purged
in accordance with the recommendations of BS 6891.
4
4. ELECTRICAL SUPPLY
Mains supply 240 V, ........ 50 Hz, 160 watts fused at 3A.
See Section 13. The length of supply cable provided
with the appliance is rated at a temperature of aooc
continuous.
5. OPEN VENTED SYSTEM
The appliance is supplied ready for connection to a
sealed water system. An open vented system can be
used by carefully removing the safety valve and seal-
ing its connection. See Section 11. Care should be
taken not to distort the pipe.
6. CONTROLS
All controls included with the appliance are specified
in the 'Short List of Parts' included in this leaflet.
There is provision for a room thermostat and frost
thermostat to be fitted to the appliance. See Section
13.
Thermostatic radiator valves can be used in the
system; however, a suitable by-pass is essential with
this type of control. See Section 15.
7.
DRAINAGE
A drain cock is fitted in the pipe connecting thE!
primary heat bank to the sealed system expansion
vessel to drain water from the boiler and the heat
bank. (Fig. 46)
8. PACKAGING
The appliance is despatched in one package. A sep-
arate package contains either the standard horizontal
or vertical flue kit. Each kit includes either a balanced
flue terminal (horizontal flue) or diverter (vertical
flue) together with the necessary duct work, sealin~1
materials, etc.
2. SITING THE APPLIANCE
(Refer also to sections 5, 6, 7 and 8).
1. The appliance is floor standing and the floor
must be firm
and level.
2. The following clearances must be left to allow for
servicing and ventilation:
(a) Above the appliance: Servicing 450 mm (18 in.)
Ventilation 5 mm (0.2 in.)
(b) In front of the appliance: Servicing 600 mm (24 in.)
Ventilation 75
mm (3 in.)
(c) Left and right-hand side: Servicing 20
mm (0.8 in.)
Ventilation 20 mm (0.8 in.)
NOTE: Care must be taken to ensure adequate space is
available at either side for installing the boiler. See Sec-
tion 9.
3. The chosen position must allow the provision of a
satisfactory balanced flue termination. See Section 6,
if a horizontal flue system is to be used OR
4. The chosen position must allow the provision of a
satisfactory secondary flue terminal discharge in a
down draught free zone. See Section 8, if a vertical
flue system is to be used.
NOTE: If the appliance is to be fitted in a timber framed
building it should be fitted in accordance with the British
Gas publication "Guide for Gas Installation in Timber
Framed Housing" Ref DM2. If in doubt advice must b~3
sought from the local Region of British Gas.
3. REMOVAL OF FACIA PANEL
AND CABINET
See Fig. 1.
NOTE: It is necessary to remove the cabinet top cover,
front cover, and may be necessary to remove the facia
panel, left and right hand side panels and lower grille to
aid installation.

Fig. 1 Cabinet - Control Panel and Facia Fixing Screws
A
A TOP
COVER RETAINING LUGS
B TOP
COVER FIXING BOLT
c FACIA FIXING SCREWS
D DHW AND CH THERMOSTAT
MOUNTING BRACKET FIXING SCREWS
E CONTROL PANEL FIXING SCREWS
F CONTROL PANEL SUPPORT BRACKET
AND SCREW
G
LEFT HAND SIDE PANEL FIXING SCREWS
H SIDE PANEL BRACKET FIXING SCREWS
J RIGHT HAND SIDE PANEL FIXING SCREWS
K LOWER FRONT GRILL
KICKSTRIP FIXING SCREWS
L FRONT COVER {NO FASTENINGS)
""
(a) Remove the cabinet front cover by pulling firmly at
the base and lifting upwards and outwards.
Remove the cabinet top cover by slackening com-
pletely the bolt 'B' retaining the front of the top
cover. See Fig. 1.
(b) Pull up the front edge of the cover sharply to
disengage the fasteners. Draw the cover forward
enough to disengage it at the rear and lift clear.
(c)
Undo the five screws 'K' holding the lower front
grille kick strip.
(d) Pull off the two thermostat knobs and remove the
five screws 'C'; two securing the ends of the facia to
the side panels and three underneath the facia, fixing
it to the base of the control panel. Pull the facia
forward until it clears the side panels. The facia will
come away complete with three position switch or
programmer, if fitted. Support the facia having
drawn it forward enough to gain access to the plug
in terminal rail positioned behind and to the right of
the heating thermostat. The terminal rail is
numbered 14 to 17 inclusive. Separate the two
halves of the terminal rail, enabling the facia to be
removed completely. (Fig. 37)
(e)
Remove the two remaining posidrive screws 'C'
retaining the top of the left hand side panel and the
two M5 slotted head screws and single posidrive
screw retaining the top of the right hand side panel
'J'. Draw the side panels forward and lift out.
NOTE: The control panel is supported in position by a
single posidrive screw 'F'. (See Fig. 1). This is intended
to hold the panel during installation only and no undue
strain should be placed on the panel.
4. SYSTEM CONSIDERATIONS
(a) The appliance includes a pump and no other
circulating pump is required. When fitting a room or
frost thermostat, refer to Section 13, Electrical. The
appliance will operate satisfactorily on a two pipe small
bore or micro-bore system.
5
J,C
c L
K
(b) The heatbank contains a finned copper heat
exchanger which provides domestic hot water. A
control system is incorporated that gives priority to
the domestic hot water and the central heating will
be turned off when a demand for hot water is made.
For large quantities of hot water the control
thermostat should be set at maximum and after
use, a few minutes may be required to re-heat the
heatbank. The central heating will remain off during
this period.
IT IS ESSENTIAL TO FIT A BYPASS TO ALL
SYSTEMS.
5. AIR SUPPLY HORIZONTAL FLUE
1. The room in which the appliance is installed does
not require a purpose air vent.
2. If the appliance is installed in a cupboard or
compartment, permanent air vents are required in
the cupboard or compartment, one at high level, and
one at low level, either direct to outside air or to a
room. Both high and low level air vents must
communicate with the same room or must both be
on the same wall to outside air. The minimum
effective areas required are given in Table 5.
Table 5 COOLING AIR REQUIREMENTS
HORIZONTAL AND VERTICAL FLUE SYSTEMS
Position of Air from
Air direct
Air Vents room from outside
High Level 264cm
2
132cm
2
{41 in
7)
{20.5in
2)
Low Level 264cm
7
132cm
2
(41 in2) (20.5in
7)

6. FLUE TERMINAL POSITION-
HORIZONTAL FLUE
IMPORTANT
1. Flue length. See note in Section 1, General Informa-
tion, regarding standard flue assembly and extension
flue.
2. The flue must be installed in accordance with the
recommendations of BS 5440:Part 1.
Minimum siting dimensions for positioning the balanced
flue terminal:
TERMINAL POSITION (See Fig. 2) MIN DISTANCE
A-
Directly below an open able
window or other opening, e.g. air
brick 300mm
(12in)
B-
Below gutters, soil pipes or
drain pipes 75mm
(3inl
c-
Below eaves 200mm
(Sin)
D-
Below balconies or car port roof 200mm
(Bin)
E- From vertical drain pipes and
soil pipes 75mm
(3in)
F -
From internal or external corners 300mm
(12in)
G -
Above ground, roof or balcony
level
300mm
(12in)
H- From a surface facing a terminal 600mm
(24in)
1-
From a terminal facing a terminal
1200mm
(47inl
J -
From an opening in a car port
(e.g. door, window) into dwelling 1200mm
(47in)
K- Vertically from a terminal on
the same wall
1500mm (59in)
L -
Horizontally from a terminal on
the same wall 300mm (12inl
GENERAL NOTES
1. The terminal must be positioned such that the com-
bustion products can disperse freely at all times.
2. In certain weather conditions a terminal may steam
and positions where this could cause a nuisance
should be avoided.
3. If the terminal is fitted within 850mm of a plastic
gutter or within 450mm of painted eaves, an alumi-
nium shield of at least 750mm long should be fitted
to the underside of the gutter or painted surface
(Dimensions 8 and C in Fig. 2).
4. If a terminal is fitted less than 2 metres (78.6in)
above a surface to which people have access then a
suitable guard must be provided. A terminal protect-
ive guard is available from: Tower Flue Components
Limited, vale Rise, Tonbridge, TN9 1TB. Terminal
Guard Reference: GC 393 553- Type K2.
The terminal guard must be securely fixed to the wall
using the three brackets provided, suitable plugs and
corrosion resistant screws. The guard must be sym-
metrically positioned about the terminal assembly
and spaced such that there is a gap of 50mm min-
imum between the end of the terminal and the guard.
5. The air inlet/products outlet duct and the terminal of
the boiler must not be closer than 50mm (2 in) to
combustible material. Detail recommendations on
protection of combustible material are given in BS
5440:1 1990, sub-section 3.3
IMPORTANT
It is absolutely ESSENTIAL to ensure, in practice,
products of combustion discharging from the
terminal cannot re-enter the building or any other
adjacent building through ventilators, windows,
doors, other sources of natural air infiltration or for-
ced ventilation/air conditioning. If this eventuality
should occur, the appliance MUST be turned off
immediately and the problem rectified.
6
7. AIR SUPPLY VERTICAL FLUES
1. The room in which the appliance is installed does not
require a purpose air vent.
2. If the appliance is installed in a cupboard or
compartment, permanent air vents are required in
the cupboard or compartment, one at high level, and
one at low level, either direct to outside air or to a
room. Both high and low level air vents must com-
municate with the same room or must both be on the
same wall to outside air. The minimum effective
areas required are given in Table 5, COOLING AIR
REQUIREMENTS, Section 5.
3. ALL installations must be provided with purpose
designed air vents in the roof space, communicating
direct with outside air.
THE MINIMUM EFFECTIVE AREA REQUIRED FOR AIR
VENTS WITHIN A ROOF SPACE IS 516cm
2 (80in2).
4. The roof space containing the diverter must be
sealed off completely from:-
(a) the room, cupboard or compartment in which the
appliance is installed and
(b) any other room.
8. CONNECTION OF PRIMARY AND
SECONDARY VERTICAL FLUES
The components up to and including the draught diverter
are supplied and these must be installed vertically above
the top boiler flue outlet, in accordance with the dim-
ensions shown in Fig. 3. Note that the draught diverter
must be positioned such that it will not be obstructed by
such as loft insulation.
A secondary flue must be fitted to the top of the draught
diverter. This component will accept flue pipe to BS 715
size 125mm (5in). If flue pipe to BS 4543 is used, then an
adaptor will need to be fitted, but the nominal internal
diameter must not be decreased. The installation of the
complete flue system must be in accordance with BS
5440:1.
The secondary flue system must be adequately sup-
ported and the exit from the roof space water proofed.
Horizontal runs and bends should ideally be avoided, but
at least minimised, and a spillage test must be carried
out in accordance with BS 5440:1. Fig. 3 shows an ap-
propriate point at which to apply the test.
No part of the flue system shall be within 25mm (1.0in)
of combustible material.
Table 7
Max. secondary flue length Max secondary flue length
if set to minimum CH input if set to maximum CH input
6m (20ft) 1Om (33ft)
The flue lengths recommended above are intended to en-
sure that condensate does not form in the secondary flue
system when the appliance operates under all approved
operating conditions.
NOTE: The permanent, purpose designed ventilation
openings required within the roof space, the openings
within the diverter and any compartment ventilation - if
applicable- MUST NOT BECOME BLOCKED.
The user MUST be instructed not to store items within
the roof space which may cause an obstruction, or in the
compartment - if applicable.
A space of at least 250mm (10in) radius shall be provided
around the draught diverter with no obstructions (Fig. 3).

Fig. 2 Siting of terminal
Horizontal Flue
A'
/
j '
-'l
..
GJ
~
Dj
'
:.Ji
, , I I
l]
A
I
~
BC~ '
L'hl
IK
•
v .
IK
!
~
I I
F'
/
,,
llF
~HI' J
, I ' '
I. I \
~J
'j
F
r·E
Fig. 3 Position of Vertical Primary
Flue and Secondary Flue
See also Fig. 17
TERMINAL
(NOT SUPPLIED)
.•
TWIN WALL SEC. FLUE -------+
IS RECOMMENDED
DRAUGHT
T
DIVERTER WITH 125mm-------l-·f"=Y
(5in) SOCKET OUTLET ~
CLEAR SPACE 250mm (10in I
RADIUS AROUND ··1-.,+-~
DIVERTER WITH NO .. . M .
OBSTRUCTIONS
STANDARD FLUE KIT
MINIMUM HEIGHT H
1557mm (61.3in)
MAXIMUM HEIGHT H
2000mm (79in)
WITH EXTENSION
KIT
MAXIMUM HEIGHT
H ~ 3000mm (118in)
BOTTOM OF FLUE OUTLET
SOCKET
H
45mm:
(1.8in) 1;
l_
G
GENERAL GUIDANCE · SITING OF
VERTICAL FLUE
TERMINAL
CHIMNEY ON RIDGE
NOT ON RIDGE
PITCH
Dim. Y 1m (3.3ft)
EXCEEDING 30°
AT OR
ABOVE ROOF
ABOVE INTERSECTION
PITCH
NOT RIDGE Dim Y
250mm (lOin)
EXCEEDING 30° LEVEL ABOVE ROOF
INTERSECTION
NOTE: A spillage test must be carried out at the
diverter HERE,
in accordance with BS5440:1.
ROOF SPACE VENTILATED
TO OUTSIDE AIR SECTION 7.3
CEILING FLUE SEALING PLATE
860mm
(33.9in)
7

9.0 INSTALLING THE APPLIANCE
GENERAL
If a HORIZONTAL FLUE is to be installed refer to Sections
2, 5, 6, 9.1 and 9.3: also Figs. 2 and 4.
If a VERTICAL FLUE is to be installed refer to Sections 2,
7, 8, 9.2 and 9.3; also Fig. 3.
NOTE: MORE THAN ONE PERSON MAY BE REQUIRED
TO
INSTAL THE APPLIANCE.
The space required for installation is 50mm (2in) at the
left hand side and 150mm (6in) at the right hand side.
A
description given in Section 9.3 covers one method of
installation. If connections are made in a different way
then the space required for installation may be greater.
In some circumstances when installing the appliance,
particularly where minimum clearances for access and
servicing have been used, it may be found necessary to
pre-plumb the appliance and fit unions and stub pipes,
(Fig 5) to the boiler pipework before moving it into posi-
tion. If so refer to Section 9.3 and make the connections
before assembling the flue system. Check to determine
whether or not an extension kit is required. Refer to Sec-
tion 1(c) and Section 2.
A knock-out panel is provided in the cabinet top panel to
facilitate vertical pipe connections.
Compression fittings may be used on all water con-
nections to allow for the fitting of the boiler and servic-
ing.
1. Unpack the appliance.
2. Unpack the standard flue kit and flue extension kit (if
required) and check the contents against the en-
dosed check list. Ensure all cardboard packing in the
standard flue assembly and flue extension is re-
moved.
3. Remove the top cover and the front panel from the
cabinet as described in Section 3.
4. The boiler is supplied suitable for a horizontal rear
flue outlet configuration; the vertical outlets being
sealed off with blanking plates. If a vertical flue is re-
quired refer to Figs 6 and 7.
To gain access to the top flue outlet cover, first re-
move the access cover. Fig. 6.
Fig. 4 Wall preparation · Rear outlet
Dimensions mm (in) -1{~~
5
)r
1---- 600 {23.6) ~
.L~ 1:1.
r- -, I
r~~- I
' ' '
) ~----~
.,(--- --....J---....1 ~
,.-t..""_ !.._----- -- - - ~ ~
(a) Remove the top air duct and flue duct blanking
plates.
(b) Run a bead of silicone sealan1 around the inside of
the rear flue duct and air duct sockets.
(c) Fit
the blanking plate into the rear flue outlet socket,
push fully home and tighten the clamping screw,
working through the top air duct socket opening.
(d) Fit the rear air duct socket blanking plate, push it
fully into the socket and tighten the clamping screw.
NOTE: THE ACCESS PANEL MUST BE REPLACED WHEN
THE FLUE SYSTEM IS FITTED.
REFER TO SECTION 9.2a {STANDARD FLUE KIT) OR 9.2b
{EXTENSION KIT) Subsection 3{a).
9.1. REAR HORIZONTAL FLUE
1. Take account of the requirements under Section 2 -
Siting the appliance.
Refer to page 1 and Fig 4. Mark the flue position re-
quired on the wall. Cut a hole in the wall 125mm (5in)
diameter.
NOTE: If a core boring tool is not used and the hole
is made oversize, it must be reduced to 130mm max-
imum diameter and the inner skin of the brickwork
made good before the appliance is installed (Sec-
tions 9.1a; 9.1b; 9.1c).
2. Determine the flue length by referring to the app-
ropriate section below, which details the correct flue/
boiler assembly procedure.
Section
9.1a.
9.1b.
9.1 c.
Length L
100mm-1000mm (4in-39.4in)
1001 mm-1200mm (39.4in-47.2in)
1201 mm-2000mm (47.2in-78.7in)
NOTE: REFER TO SECTION 9.3. COMPLETE THIS PART
OF THE
INSTALLATION AS NECESSARY BEFORE
ASSEMBLING THE REQUIRED FLUE ARRANGEMENT.
TOP AIR DUCT SOCKET
{DEPTH
18mm {0.7in)
HOLE CUT THROUGH WALL
TO ACCEPT REAR AIR DUCT
WALL THICKNESS TO
INCLUDE
ANY SURFACE
FINISH, INSIDE
OR OUTSIDE
REAR AIR DUCT SOCKET
{DEPTH
18mm {0.7in)
INSIDE
PLASTER
DIMENSIONS ON PAGE 1 MAY
VARY DEPENDING ON WHETHER
ANY FLOOR COVERING IS
REMOVED AND/OR INSULATING
SHEET IS PLACED BETWEEN THE
APPLIANCE AND THE FLOOR
FLOOR LEVEL
8
OUTSIDE
RENDERING
IF APPLIED

Fig. 5 Rear View of Boiler Pipework and Flue
Connections
NOTE: ALL DIMENSIONS ARE NOMINAL mm (in)
A CENTRAL HEATING RETURN (28mm)
B SAFETY VALVE (22mm)
C GAS INLET (22mm)
D DOMESTIC COLD WATER
IN- R'h ('/,in BSP)
E DOMESTIC HOT WATER OUT (22mm)
F CENTRAL HEATING FLOW (28mm)
G VENT AND FEED (22mm)
H REAR FLUE CONNECTION (Centrelines)
=
I
[c
r--·
r --~
r--:_:
I ~
~f
-:-·. ~
•
---
I
I
~..,
H 377mm (14.81n) ___,
--550mm {21.6in)-- -1
G & B200mm (7.9in)
D 170mm (6_7in)
E 135mm (5.3in)
F 90mm (3.5~n}
A 60mm (2.4in)
mn
~-g-~ .£ :s
cr>LOcn~rn
<Drnoc<Jc<J
2.!-~~~'22.
E E E E E
E E E E E
N 0 lO o o
<r>mro~<D
<Dr-r-roro
Fig. 7 Flue/Air Duct Socket Clamping Screws
NOTE: A SIMILAR METHOD
IS USED TO CLAMP THE
REAR AIR DUCT.
ACCESS TO THE SCREW
IS FROM THE TOP (FIG 6)
VERTICAL AIR DUCT
CLAMPING SCREW
_.---- VERTICAL AIR
__ _;;;____ DUCT SOCKET
REAR FLUE DUCT
CLAMPING SCREW
Fig. 6 Interchanging Positions of Air Duct/Flue Duct Outlet Blanking Plates
FLUE DUCT HOUSING
REAR FLUE DUCT BLANKING
PLATE POSITION
9
APPLY SEALANT AROUND INSIDE
OF FLUE AND AIR DUCT SOCKETS
tr
REAR AIR DUCT
BLANKING PLATE
POSITION
I

9.1 a BOILER FLUE ASSEMBLY
REAR OUTLET
100mm-1000mm (4in-39.4in}
NOTE: An extension kit is NOT required.
1. Cut the air duct to length as follows:-
(a) Measure the wall thickness Land add 28mm (1.1in).
(Fig 4, 8
and 15). This is the overall length of 110mm
(4.5in) diameter air duct required.
(b) Reduce the air duct 'A' to L + 28mm (1.1in). Note.
that one end of the duct has two holes drilled. DO
NOT CUT FROM THIS END OF THE DUCT.
2. Cut the flue duct to length as follows:-
(a) Take wall thickness Land add 51mm (2.0in). This is
the overall length of 60mm diameter (2.38in) flue
duct required.
(b) Reduce the flue duct to 'C' to L + 51mm (2.0in) by
cutting from either end. (Fig 9).
3.
Refer to Figs 6 & 7. Slacken the vertical air duct clam-
ping screw sufficient to allow the air duct blanking
plate to be pulled out of its socket. This will facilitate
access to the rear flue duct clamping screw.
Depending on wall thickness and space available the
flue duct only should either:-
(a) Be passed through the wall from outside and then
fixed into the socket at the rear of the flue duct
housing (Fig 8) or
(b) If the flue duct is relatively short e.g. less than
400mm {16in) it may be fixed directly to the flue
duct housing prior to moving the boiler into posi-
tion in front of the inner wall face. (Fig 8).
4. Remove the backing paper from the square sealing
gasket provided. Position the gasket as shown, then
press the adhesive backed side firmly against the
back panel, around the rear flue outlet (Fig 8).
Either
(a) Apply a bead of silicone sealant around the inside of
the rear flue duct socket and around the inside of
the rear air duct socket. Move the appliance into
position, square to the wall face, standing centrally
in front of the hole in the wall. Position the back
pane140mm {1.6in) in front of the watl face. Pass the
flue duct through the wall and push the end fully
home into the rear flue duct socket. Working
through the top air duct socket tighten the rear flue
duct clamping screw. Make sure the flue duct is pos-
itioned concentrically within the rear air duct socket
and the hole in the wall.
or
(b) Push one end of the flue duct fully home into the
rear flue duct socket. Working through the top air
duct socket tighten the rear flue duct clamping
screw. Make sure the flue duct is positioned con-
centrically within the rear air duct socket.
Move the appliance into position, square to the wall
face, with the back panel about 40mm (1.6in) in
front of the wall. Allow the flue duct to pass into the
hole and check the duct is positioned concentrically.
5. Fit the flue terminal into the end of the air duct with
holes. Slide the flue terminal into the air duct up to
the rolled stop channel. Using the holes in the air
duct as a guide drill through the flue terminal with
the 3mm drill supplied. Screw the assembly together
with two No 6 x 10mm self-tapping screws provided.
(Fig 10).
6. RECHECK THAT ANY STUB PIPE CONNECTIONS RE-
QUIRED HAVE BEEN MADE. (SECTION 9.3).
7. Working from outside pass the air duct and terminal
assembly through the hole. A flue expansion joint of
about 100mm {4in) is allowed for. The short section
of flue duct inside the terminal will engage and push
over the section of flue duct connected to the boiler,
provided the air and flue duct have been cut ac-
curately.
10
Fig. 8 Rear Flue Application
FLUE DUCT HOUSING
PLAN VIEW
,,
"
CLAMPING ,..--------------,\1
SCREW
P~b.R
FLUE
OUTLET
SOCKET
SEALANT
SEALING
GASKET
BLANKING PLATE
REMOVED FROM TOP AIR
DUCT INLET SOCKET
TOP AIR/FLUE DUCT
CLAMPING SCREWS
BLANKING PLATE "
FITIED IN TOP FLUE
OUTLET SOCKET
ACCESS PANEL, WITH
M5 SLOTIED HEAD FIXING
SCREW FOR TOP FLUE OUTLET CLAMPING SCREW
REAR AIR DUCT /
CLAMPING SCREW
OUTER
WALL
FACE
POSITION
SEALING GASKET
AROUND REAR FLUE OUTLET AS SHOWN
Fig.Ba OUTER
WALL
SEALING GASKET
/

8. Move the appliance into its final position. The air
duct should be pushed fully home into the air duct
socket. The back of the socket should be flush with
the wall face, compressing the sealing gasket (Fig 8).
Tighten the air duct clamping screw.
9. Run a bead of silicone sealant around the inside of
the top air duct socket. Refit the blanking plate,
pushing
it down until it is fully home. Tighten the top
air duct clamping screw.
REFER TO SECTION 9.3.
Note. The rubber sealing ring only may be used
with the terminal fitted to this appliance to provide
a wall seai.See Fig.8a
Fig. 9 Rear flue application
FOR WALL THICKNESSES 100mm to 1000mm (4.Q;n to 39.3;n) USE THE STANDARD FLUE KIT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.1a BEFORE CUTTING AIR OR FLUE DUCTS
Air duct -Rear flue application
ENSURE END IS SQUARE AND FREE OF BURRS.
r * OVERALL LENGTH~ L PLUS 28mm (1.1;n) ~
110mm (4.S;n) [I A 0 I
DIAMETER
~------------------------~
DO NOT CUT FROM THE END
WITH TWO HOLES
Flue duct -Rear flue application
~*OVERALL LENGTH~ L PLUS 51mm (2.0;n)
~--------c--------~~
CUT FLUE DUCT TO REQUIRED LENGTH FROM EITHER END.
ENSURE END IS SQUARE AND FREE OF BURRS.
Fig. 10 Rear flue duct assembly
60mm (2.38;n)
DIAMETER
FOR WALL THICKNESSES 100mm to 1000mm (4.Q;n to 39.3;n) USE THE STANDARD FLUE KIT
FLUE DUCT
IMPORTANT: REFER TO INSTRUCTION IN SECTION 9.1 a BEFORE ASSEMBLY
A FLUE DUCT EXPANSION JOINT OF APPROXIMATELY
100mm (4;n) OVERLAP IS ALLOWED FOR
PROVIDING THE AIR AND FLUE DUCTS ARE
ACCURATELY CUT TO THE REQUIRED LENGTH.
TWO No.6 x 1Dmm
SELF TAPPING SCREWS
\
FLUE
AIR DUCT FLUE
TERMINAL
;..--*OVERALL LENGTH~ L PLUS 51mm (2.0;nl--
1
~
3
9
~nT j l- * OVERALL LENGTH~ L PLUS 28mm (1.1;n) ROLLED STOP
CHANNEL
FIT FLUE TERMINAL INTO END OF AIR DUCT. SLIDE THE FLUE TERMINAL INTO THE AIR DUCT UP TO THE ROLLED
STOP CHANNEL.
USING THE HOLES ALREADY IN THE END OF THE AIR DUCT, DRILL THROUGH THE FLUE
TERMINAL WITH THE 3mm DRILL SUPPLIED. SECURE THE ASSEMBLY TOGETHER WITH THE TWO SELF TAPPING
SCREWS
No 6 x 10mm SUPPLIED.
11

9.1 b BOILER FLUE ASSEMBLY
REAR
1001mm ~ 1200mm (39.5in- 47.2in)
NOTE: Use the standard flue kit and extension flue kit.
1. Cut the air duct to length as follows:
(a) Measure the wall thickness L. and add 28mm (1.1in).
This is the overall length of 110mm (4.5in) diameter
air duct required.
(b) Reduce the length of the extension air duct 'B' to
900mm {35.4in). Cut surplus from plain end ONLY.
(Fig. 11)
{c) Fully engage the end of air duct 'A' (without holes)
into the expanded end of air duct 'B' (Fig. 11)
(d)
Reduce the length of the standard air duct 'A' by
cutting from the end WITHOUT holes to the required
overall length (Fig.11)
(e)
Using the two holes in the expanded end of air duct
'8' as a guide, drill two 3mm diameter holes using
the drill supplied. Disengage the air ducts and apply
a smear of silicone sealant around the outside of the
previously engaged end of air duct 'A'. Reassemble
and secure with two self-tapping screws supplied.
(F1gs 11 & 12).
2.
Slide the flue terminal into the open end of air duct
'A', to the rolled stop channel.
Using the holes at the end of air duct 'A' as a guide,
drill through the flue terminal with the 3mm drill
supplied. Secure tt1e assembly together with two
No.6 x 10mm self-tapping screws. {Figs. 11 & 12).
3. Cut and assemble the flue duct as follows:
(a) Take the wall thickness Land add 51mm (2.0in); This
is the overall depth of 60mm (2.38in) diameter flue
duct required.
(b) Reduce the length of the standard flue duct 'C' to
900mm (35.4in) by cutting from either end. (Fig. 11).
(c)
Fully engage either end of flue duct 'C' into the
expanded end of flue duct 'D' (Fig. 11).
(d)
Reduce the length of the extension flue duct 'D' by
cutting from the plain end, to the required overall
length. (Fig. 11).
(e) Using the two holes in the expanded end of flue duct
'D' as a guide, drill two 3mm diameter holes using
the drill supplied. Disengage the flue ducts and apply
a smear of silicone sealant around the previously
engaged end of flue duct 'C'. Reassemble and secure
with two self-tapping screws supplied (Figs. 11 & 12).
(f) Refer
to Figs 6 and 7. Slacken the vertical air duct
clamping screw sufficient to allow the air duct blank-
ing plate to be pulled out of its socket. This will fac-
ilitate access to the rear flue duct clamping screw.
Run a bead of silicone sealant round the inside of
the rear air duct socket.
NOTE: If the fully assembled flue and air ducts are to be
passed through the hole in the wall as described below
(9.1 b.4 and 9.1 b.6) there MUST be sufficient access. If
access is insufficient it may be possible to assemble the
duct work piecemeal, passing it through the hole as each
section is added.
4. Remove the backing paper from the square sealing
gasket provided. Position the gasket as shown, then
press the adhesive backed side firmly against the
back panel, around the rear flue outlet (Fig. 8).
Apply a bead of silicone sealant around the inside of
the flue duct and air duct sockets.
Move the appliance into position, square to the wall
face, standing centrally in front of the hole in the
wall. Position the back panel about 40mm (1.6} in
front of the wall face. Pass the flue duct through the
wall and push the end fully home into the rear flue
duct socket. Working through the top air duct socket
tighten the rear flue dtJCt clamping screw. Make sure
the flue duct is positioned concentrically within the
rear air duct socket and the hole in the wall.
12
5. RECHECK THAT ANY STUB PIPE CONNECTIONS
REQUIRED HAVE BEEN MADE. (SECTION 9.3)
6.
Working from outside pass the air duct and terminal
assembly through the hole. A flue expansion joint of
about 100mm (4in) is allowed for. The short section
of flue duct inside the terminal will engage and push
over the section of flue duct connected to the boiiE!r,
provided the air and flue ducts have been cut
accurately.
7. Move the appliance into its final position. The air
duct should be pushed fully home into the air duct
socket. The back of the socket should be flush with
the wall face. Tighten the air duct clamping screw.
8. Run a bead of silicone sealant around the inside of
the top air duct socket. Refit the blanking plate
pushing it down until it is fully home. Tighten the top
air duct clamping screw.
REFER TO SECTION 9.3
9.1 c BOILER FLUE ASSEMBL V
REAR
1201mm- 2000mm (4:,.3in- 78.7in)
NOTE: Use the standard flue kit and the extension flue
kit.
1. Cut the air duct to length as follows:
(a) Measure the wall thickness l and add 28mm (1.1in).
This is the overall length of 110mm (4.5in) diameter
air duct required. (Figs. 4, 8 and 16)
{b)
Do not reduce the length of the extension air duct 'B'.
(Fig. 13).
(c) Fully engage the end of air duct 'A' (without holes)
into the expanded end of air duct 'B'.
(d) Reduce the length of the standard air duct 'A' by
cutting from the end without holes to the required
overall length. (Fig. 13)
(e)
Using the two holes in the expanded end of air duct
'B' as a guide, drill two 3mrn diameter holes using
the drill supplied. Disengage the air ducts and apply
a smear of silicone sealant around the outside of the
previously engaged end of air duct 'A'. Reassemble
and secure with the two self-tapping screws
supplied. (Figs. 13 & 14)
2.
Slide the flue terminal into the open end of air duct
'A', to the rolled stop channel.
Using the holes at the end o1' air duct 'A' as a guide,
drill through the flue terminal with the 3mm drill
supplied. Secure the assembly together with the two
No.6 x 10mm self-tapping screws. (Figs. 13 & 14)
3.
Cut and assemble the flue duct as follows:
(a) Do not reduce the length of the standard flue duct 'C'.
{Fig. 13)
(b) Take the wall thickness Land add 51mm (2.0in).
(c)
Fully engage either end of flue duct 'C' into the
expanded end of flue duct 'D'. (Fig. 13)
(d)
Reduce the length of the ex':ension flue duct 'D' by
cutting from the plain end, until the required overall
length, after engagement of the two ducts, is ob-
tained. (Fig.13)
(e)
Using the two holes in the expanded end of duct 'D'
as a guide, drill two 3mm diameter holes using the
drill supplied. Disengage the flue ducts and apply a
smear of silicone sealant around the previously enga-
ged end of flue duct 'C'. Reassemble and secure with
the two self tapping screws supplied. (Figs 13 & 14)

(f) Refer to Figs. 6 and 7. Slacken the vertical air duct
clamping screw sufficient to
allow the air duct blank-
ing plate to be pulled out of its socket. This will
facilitate access to the rear flue duct clam pin~ screw.
NOTE: If the fully assembled flue and air ducts are to be
passed through the hole
in the wall as described below
(9.1c.4 and 9.1c.6) there MUST be sufficient access. If
access is insufficient, it may be possible to assemble the
duct work piecemeal, passing
it through the hole as each
section
is added.
Fig. 11 Rear flue application
FOR WALL THICKNESSES/FLUE LENGTHS 1001mm to 1200mm (39.4in to 47.0in) USE THE STANDARD FLUE KIT
AND THE EXTENSION FLUE KIT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.1 b BEFORE CUTTING AIR OR FLUE DUCTS
Air duct -Rear flue application
r:
o--- * OVERALL LENGTH~ L PLUS 28mm (1.1in)
l-·-t-------900mm (35.4in)-----~
100mm (4.5in)
DIAMETER
....,._1
[
EXISTING HOLES FOR
/
f============"jrj!;/~~r2~==~/ FIXING TERMINAL
DO NOT CUT - ~ '- REDUCE LENGTH OF
EXPANDED END STANDARD AIR DUCT BY CUTTING
REDUCE THE LENGTH OF THE
EXTENSION AIR DUCT TO
900mm (35.4in) CUT SURPLUS
FROM THIS END. ENSURE END
IS
SQUARE AND FREE OF BURRS.
FROM END
WITHOUT HOLES.
ON FINAL
ASSEMBLY APPLY A
SMEAR OF SILICONE SEALANT
AROUND THE OUTSIDE OF THE
STANDARD DUCT.
Flue duct -Rear flue application
~~:------* OVERALL LENGTH~ L PLUS 51mm (2.0in) ---,
.i_ i-o[-l-------900mm (3.5in) I
60mm (2.4in) I 1 1~
DIAMETER 6::;:;:;:;:;:;:;============~~~=====;=====;=dl'.~
T ~~ REDUCE LENGTH OF
REDUCE LENGTH OF STANDARD FLUE ON FINAL ASSEMBLY APPLY EXTENSION PIECE BY CUTTING
DUCT
TO 900mm (3.5in). CUT SURPLUS A SMEAR OF SILICONE SEALANT SURPLUS FROM THIS END.
FROM EITHER END. ENSURE END AROUND THE OUTSIDE OF THE ENSURE END IS SQUARE
IS SQUARE
AND FREE OF BURRS. STANDARD DUCT. AND FREE OF BURRS.
Fig. 12 Rear flue duct assembly
FOR WALL THICKNESSES/FLUE LENGTHS 1001mm to 1200mm 139.4in to 47.0in) USE THE STANDARD FLUE KIT
AND THE EXTENSION FLUE KIT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.1 b BEFORE ASSEMBLY
A FLUE DUCT EXPANSION JOINT OF APPROXIMATELY 100mm (4in) OVERLAP IS
ALLOWED
FOR PROVIDING THE AIR AND FLUE DUCTS ARE ACCURATELY CUT TO THE REQUIRED LENGTH
23mm
(0.9in)
STANDARD AIR DUCT STANDARD FLUE DUCT /
~F~LU~E~D~U~C~T~~E~XT~E~~~S~IO~N~~~~A~IR~D~UC~~~E~X~T~~~N~SI~O~N~~~~~§:==~£L,
~ * OVERALL LENGTH L PLUS 51mm (2.0in)
jI SUPPORT SPIDER /
J, ROLL,ED STOP
~*OVERALL LENGTH~ L PLUS 28mm (1.1in)----.1
CHANNEL
FLUE
TERMINAL
FIT FLUE TERMINAL INTO END OF AIR DUCT EXTENSION UP TO THE ROLLED STOP CHANNEL. USING THE HOLES
IN THE AIR DUCT EXTENSION
AS A GUIDE DRILL TWO 3mm DIAMETER HOLES THROUGH THE FLUE TERMINAL
WITH THE DRILL SUPPLIED. SECURE ASSEMBLY TOGETHER WITH TWO SELF-TAPPING SCREWS SUPPLIED.
13

Fig. 13 Rear flue application I
FOR WALL THICKNESSES/FLUE LENGTHS FROM 1201mm to 2000mm (47.3in to 78.7in) USE THE STANDARD FLUE ·
KIT
AND THE EXTENSION FLUE KIT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.1e BEFORE CUTTING AIR OR FLUE DUCTS.
Air duct -Rear flue application
EXISTING
HOLES
FOR FIXING
TERMINAL
DO NOT REDUCE THE LENGTH
OF THE EXTENSION AIR DUCT ON FINAL
ASSEMBLY APPLY A
SMEAR OF SILICONE SEALANT
AROUND THE OUTSIDE OF THE
STANDARD DUCT
REDUCE LENGTH
OF STANDARD
AIR DUCT BY CUTTING FROM
END WITHOUT HOLES
Flue duct -Rear flue application
~---* OVERALL LENGTH~ L PLUS 51mm (2.0in)-----,
.1__ t------ 1 265mm (50in) J I
60mm (2.38in) I C : l D I
DIAMETER I i' FIEDUCE LENGTH OF
f DO NOT CUT ----------- \ EXTENSION PIECE BY
EXPANDED END CUTTING SURPLUS
DO
NOT REDUCE LENGTH OF
STANDARD FLUE DUCT ON FINAL
ASSEMBLY APPLY A
SMEAR OF SILICONE SEALANT
AROUND THE OUTSIDE OF
THE STANDARD DUCT.
NOTE: USE SUPPORT SPIDER AS SHOWN BELOW
FROM THIS END.
ENSURE END
IS SQUARE AND
FREE OF BURRS.
Fig. 14 Rear flue duct assembly
FOR WALL THICKNESSES/FLUE LENGTHS FROM
1201mm to 2000mm (47.3in to 78.7in) USE THE
STANDARD FLUE KIT AND THE EXTENTION FLUE KIT
STANDARD
FLUE DUCT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.1c BEFORE ASSEMBLY
ON FINAL ASSEMBLY ENSURE THAT
SUPPORT SPIDER IS FITTED OVER FLUE DUCT
AND PUSHED AGAINST EXPANDED END.
A FLUE
DUCT EXPANSION JOINT OF
APPROXIMATELY 100mm (4in)
OVERLAP IS ALLOWED FOR
PROVIDING THE AIR AND FLUE DUCTS
ARE ACCURATELY CUT TO THE
REQUIRED LENGTH.
AIR DUCT
EXTENSION
'
SUPPORT
SPIDER~
AIR D+CT 'f
STANDARD I
~IU!~o'='U' A'IJI AOL_,
L PLUS 51 mm (2.0in) C : I
* OVERALL LENGTH
23mm ,._
(0.9in) l FLUE
DUC/
EXTENSION
-- * OVERALL LENGTH~ L PLUS 28mm (1 1m) ---•
~"'~\;;;3""18"" og.,o~i(.
FLUE
TERMINAL
ROLLED STOP
CHANNEL
SLIDE THE FLUE
TERMINAL INTO THE AIR DUCT UP TO THE ROLLED STOP CHANNEL. USING THE HOLES IN THE
END OF AIR DUCT
AS A GUIDE DRILL THROUGH THE FLUE TERMINAL WITH THE 3mm DRILL SUPPLIED. SECURE
THE ASSEMBLY TOGETHER WITH TWO SELF-TAPPING SCREWS.
14

4. Remove the backing paper from the square sealing
gasket provided. Position the gasket as shown, then
press the adhesive backed side firmly against the
back panel around the rear flue outlet. (Fig. 8).
Fig. 15 Arrangement of rear flue application
Standard flue kit
Apply a bead of silicone sealant around the inside of
the flue duct and air duct sockets. Move the
appliance into position, square to the wall face,
standing centrally in front of the hole in the wall.
Position the back panel about 40mm (1.6in) in front
of the wall face. Pass the flue duct through the wall
and push the end fully home into the rear flue duct
socket. Working through the top air duct socket
tighten the rear flue duct clamping screw. Make sure
the flue duct is positioned concentrically within the
rear air duct socket and the hole in the wall.
MAKE GOOD
APPLY SILICONE SEALANT
TO INSIDE OF APPLIANCE
AIR
DUCT INLET SOCKET
BEFORE INSERTING AIR
DUCT
5. RECHECK THAT ANY STUB PIPE CONNECTIONS
REQUIRED HAVE BEEN MADE. (SECTION 9.3).
6. Working from outside pass the air duct and terminal
assembly through the hole. A flue expansion joint of
about 100mm (4in) is allowed for. The short section
of flue duct inside the terminal will engage and push
over the section of flue duct connected to the boiler,
provided the air and flue ducts have been cut
accurately.
7. Move the appliance into its final position. The air
duct should be pushed fully home into the air duct
socket. The back of the socket should be flush with
the wall face. Tighten the air duct clamping screw.
8. Run a bead of silicone sealant around the inside of
the top air duct socket. Refit the blanking plate
pushing it down until it is fully home. Tighten the top
air duct clamping screw. REFER TO SECTION 9.3.
Fig. 16 Arrangement of rear flue application.
Standard flue assembly and extension flue.
EXTERNAL WALL FACE.
SEE
DETAIL
FIG. 16 --- L·
MINIMUM--
FLUE LENGTH
100mm (4in)
MAXIMUM
FLUE LENGTH
1000mm (39in)
SEE FIG. 10 FOR
AIR DUCT, FLUE
DUCT
FIXING DETAIL
FLUE DUCT
HOUSING
APPLIANCE
l
MAKE GOOD EXTERNAL
WALL FACE
MAKE GOOD INTERNAL WALL FACE
AROUND AIR DUCT IF NECESSARY SEE FIG. 12
AND 14 FOR AIR DUCT,
FLUE DUCT FIXING DETAIL
~:~~;;;, ~==od'---n
DO I
APPLY SILICONE SEALANT
TO INSIDE OF APPLIANCE
AIR
DUCT INLET SOCKET
BEFORE INSERTING AIR
DUCT
FLUE
TERMINAL
* L ~ WALL THICKNESS DISTANCE
FROM INTERNAL WALL TO EXTERNAL WALL.
NOTE: STANDARD FLUE KIT AS SUPPLIED.
MINIMUM LENGTH 100mm (4in). MAXIMUM LENGTH
1000mm (39in) WITH EXTENSION FLUE KIT
INCREASES
TO A MAXIMUM OF 2000mm (78in).
u
J LROLLD CHANNEL TO BE 10mm (0.4in)
CLEAR OF WALL.
15
FLUE DUCT
HOUSING
APPLIANCE

9.2 VERTICAL FLUE SYSTEMS
1. Refer to Fig 3 and take account of the requirements
of Section 2 - Siting the Appliance, and Section 18 -
Connection of primary and secondary vertical flues.
2. Determine the FINAL installed position of the boiler
and mark on the ceiling, directly above the appliance,
the centre of the vertical air duct socket. Refer to
page 1 and Fig 4 for dimensional details. Cut a hole
125mm {5in) diameter accurately through the ceiling.
Offer up the ceiling plate, and position it so that it is
possible to drill through the plate and provide four
fixing hole positions for the No. 8 x 30mm wood
screws provided, fixed either into the existing joists
or into reinforcement nags, which may be fixed to
the joists. Refer to Fig. 19. Alternatively, the plate
may be fixed to the ceiling using plasterboard toggle
screws. A minimum of four fixing positions is requi~
red. Leave plate loose for now.
Seal any air gap between the back of the plate and
the ceiling with silicone sealant applied prior to
screwing the plate in final position.
3. Determine the overall length H of vertical primary air
duct required.
H = the vertical distance measured from the bottom
of the air duct socket on top of the appliance to the
top of the air duct socket on the underside of the div-
erter (Fig 17).
The bottom of the diverter must be situated no less
than 250mm (lOin) above the ceiling joists or any
roof space insulation installed on top of the joists.
NOTE: When the minimum diverter height of 250mm
(10in) above joists is used the STANDARD vertical
flue kit will accommodate the installation of the app-
liance under ceilings of nominal height between
1980mm (78in) and 2424mm (95.4in) when the
overall thickness of joists, plaster and any insulation
in the roof space is 150mm (5.9in), Fig 17.
When an extension duct kit is used, ceiling heights
up to a nominal maximum of 3424mm (134.8in) may
be used (Fig 17).
4.
Determine the vertical flue length H by refering to the
appropriate section below, which details the correct
flue boiler assembly procedure.
Section
Overall length of vertical
flue duct/air duct H
9.2a 1
557mm-2000mm
(61.3in-78.7i n)
9.2b 2001
mm-3000mm
(78.8in-118.1 inI
9.2a BOILER FLUE ASSEMBL V -
VERTICAL
( 1557mm-2000mm) (61.3in-78.7in)
For overall flue height H between 1587mm-2000mm
(61.3in-78.7in) use the standard flue kit only.
1. Cut and assemble the air duct as follows (Fig 20):
(a) The overall length H. (Figs 17 and 20). This is the
overall length of 110mm (4.3m) diameter air duct re-
quired.
(b) Do not reduce the length of air duct 'A' (Fig. 20).
(c) Fully engage one end of air duct 'B' into the expan-
ded end of air duct 'A'.
16
(d) Reduce the length of the duct with plain ends, ail'
duct '8' to the required overall length.
(e) Using the two holes in the expanded end of air duct
'A' as a guide, drill two 3mm diameter holes usinq
the drill supplied. Disengage the air ducts and appl~·
a smear of silicone sealant around the outside of the1
previously inserted end of air duct '8'. Reassemble
and secure with two self-tapping screws supplied.
Fig. 17
ROOF SPACE
JOISTS, PLASTER,
INSULATION, ETC.
1
156m""""ill
(6.0in) I--~=~
··-~
OVERALL VERTICAL
FLUE LENGTH
1557mm-2000mm
(61.3in-78.7in)
WITH STANDARD
FLUE KIT
2001mm-3000mm MAX.
(78.8in-118.1in)
WITH EXTENSION '!"
I I
I I
I I
I I
FLUE KIT
H
SECONDARY
FLUE 125mm (5in)
DIAMETER
t
NOMINAL CEILING
HEIGHTS
1980mm-2424mm
(78in-95in) USING
STANDARD
FLUE KIT.
3424mm (134.8in)
MAX. WITH
EXTENSION
FLUE KIT
l
2. Cut and assemble the flue duct as follows:
(a) Fully engage the plain end of flue duct 'D' into the ex-
panded end of flue duct 'E' (Fig 20).
(b) Reduce the flue length to the same length H used for
the air ducts. (Fig. 20). This is the overall length of
60mm (2.38in) diameter flue duct required.
(c) Do not reduce the length of flue duct 'D'. (Fig. 20).
(d) Reduce the length of flue duct 'E' by cutting from the
plain end only (Fig 20).
(e) Using the two holes in the expanded end of flue duct
'E' as a guide, drill two 3mm diameter holes using
the drill supplied. Disengage thH ducts.
Engage one end of the flue stub duct into the expan-
ded end of flue duct at 'D' (Fig 20). Using the two
holes in the socket end as a guide, drill two 3mm dia-
meter holes using the drill supplied. Disengage the
two ducts.
Apply a smear of silicone sealant around the outside
of the plain end of flue duct 'D'. Engage it with the
expanded end of flue duct 'E' and fix with the two
self-tapping screws provided (Fig 20).

Fig. 18 Top Stub Flue Duct Application
-Rear View
AIR DUCT
CLAMPING
SCREW
*FLUE DUCT
CLAMPING
SCREW
TOP OF BOILER
lm I NNE/ASING
-~STUB
FLUE DUCT
SEE NOTE~ / SEALANT
mnO"""
FLUE DUCT =SIN~
REAR FLUE OUTLET
WITH BLANKING PLATE
IN POSITION
* NOTE:
3.
Access to the flue duct clamping screw is through
a hole in the upper front casing. (Fig. 6)
{a) Apply a bead of silicone sealant around the inside of
the top flue outlet socket. Insert the end of the stub
duct without holes fully into the socket. {Fig 18).
Working through the access hole in the upper front
panel of the casing, tighten the top flue outlet
clamping screw. (Figs 6 and 7).
Ensure the stub duct is positioned concentrically
within the air duct socket.
REPLACE THE ACCESS COVER.
(b) Partly assemble the flue/air duct system as follows.
Slide the support spider over the end of the flue duct
to be inserted into the diverter socket (Fig 20). Push it
down the duct to the expanded end. Slide the flue
duct inside the air duct. Ensure both ducts are the
correct way round. The air duct socket in the centre
of the duct should be positioned upwards and the
socket in the centre of the flue duct positioned down-
wards.
Slide the sealing plate over the top end of the air
duct before commencing to position the assembly.
Ensure the socket on the sealing plate is looking
DOWN.
(c) Before positioning the boiler, push the top of the flue
assembly through the hole in the ceiling. Lift the
assembly far enough into the roof space to allow the
bottom of the flue duct to be supported, using a woo-
den batten between 950mm-1 OOOmm (37.5in-39in)
long, off the ground. Ensure the supported assembly
is vertical.
(d) Refer to Fig 19.
Lift the sealing plate up to the underside of the ceil-
ing and fix as described under Section 9.2.2.
(e)
Lift the AIR duct assembly into the roof space suf-
ficient to allow the appliance to be positioned under
it and the flue duct supported as described in Section
9.2a.4.
17
4.
(a)
Retain the AIR duct in position by tightening the seal-
ing plate clamping screw (Fig 19).
Ensure the assembly is vertical.
RECHECK TO ENSURE THAT ANY STUB PIPE CON-
NECTIONS REQUIRED HAVE BEEN
MADE
Refer to Section 9.3.
Move the appliance into position, just in front of the
supported vertical flue. Position the centre of the top
flue outlet socket in line with the supported flue
assembly.
Run a bead of silicone sealant around the inside of
the top air duct socket and around the open end of
the flue stub duct.
(b) Lift the vertical flue system assembly and remove the
wooden batten. Support the assembly by hand whilst
moving the appliance into its final position. Keeping
the outer air duct raised, lower the inner flue duct
sliding the socket end over the flue stub duct. Secure
with the two self-tapping screws provided (Fig 20).
(c) Slacken the sealing plate clamping screw and lower
the outer air duct, sliding the end into the top air duct
socket.
(d) Working within the roof space, fit the diverter to the
top of the flue system as follows:-
5.
(i) Apply a bead of silicone sealant around the in-
side of the air duct socket at the bottom of the
diverter.
(ii) Apply a smear of silicone sealant around the out-
side of the flue duct at the top of the flue system.
(iii) Slide the air duct and flue duct sockets at the
bottom of the diverter over the end of the air and
flue ducts.
(a) Ensure the flue system is vertical. If necessary move
the appliance slightly to achieve this. When the flue
system is vertical check that the air duct and flue
ducts are fully home in their respective sockets at the
top and bottom of the vertical ducts, then tighten the
clamping screws.
Now install the secondary flue in accordance with
Section 8. Refer to Section 9.3.
Fig. 19 Sealing Plate Fixing
DRILL A MINIMUM OF FOUR HOLES 6mrn (0.25in)
DIA. FOR No.8 x 30rnrn WOOD SCREWS
CLAMPING
SCREW FLUE
SEALING
PLATE
IMPORTANT NOTE:
Before screwing the sealing
plate into position, run a bead
of silicone sealant - sufficient to
ensure an air tight seal after
fixing around all four
edges of the plate.
25mm
MINIMUM GAP
TO COMBUSTIBLE
MATERIAL

Fig. 20 Vertical flue application
FOR OVERALL VERTICAL FLUE LENGTHS FROM 1557mm to 2000mm (61.3in to 78.7in) USE THE STANDARD
VERTICAL FLUE KIT
IMPORTANT: REFER TO INSTRUCTIONS IN SECTION 9.2a BEFORE CUTTING AIR OR FLUE DUCTS OR ASSEMBLiNG
AIR DUCT· VERTICAL FLUE APPLICATION FLUE
DUCT· VERTICAL FLUE APPLICATION
TOP
~
B
ALL
TH
CONNECT TO DIVERTER CONNECT
TO DIVERTER
FLUE DUCT SOCKET
/AIR DUCT SOCKET
-
t-
s REDUCE LENGTH
OF THIS
ECTION BY CUTTING SURPLUS
FROM THIS END.
ENSURE ENDS ARE SQUARE
~------- E
CUT AND FREE FROM BURRS.
A
A
ON FINAL ASSEMBLY APPLY
SMEAR OF SILICONE
SEALANT~~~~J/......~\
ROUND THE OUTSIDE OF THIS
sECTION AND FIX USING TWO
SE
LF·TAPPING SCREWS PROVIDED
OVER
LENG
H
SECTION 9.2(3)
t-
DO NOT CUT THIS SECTION ------11
THIS JOINT IS NOT SEALED OR
OVERALL
LENGTH
A F SECURED
UNTIL THE MAIN
LUE ASSEMBLY AND APPLIANCE
ARE IN THEIR FINAL POSITIONS
REFER SECTION 9.2a.(4)
D
H
SECTION 9.2(3)
L__~
CONNECT TO APPLIANCE AIR
DUCT INLET SOCKET
ri
FLUE STUB DUCT~
125mm (5in) FLUE
110mm (4.7in)
DIAMETER
OUTLET SOCKET
FOR CONNECTION
OF SECONDARY FLUE SYSTEM
TO
BS 5440-1
TOP
CLAMPING SCREW.
DIVERTER
oono
A FLUE DUCT EXPANSION JOINT
OF APPROXIMATELY 100mm (4in)
OVERLAP IS ALLOWED FOR
PROVIDING THE AIR AND FLUE--
DUCTS ARE ACCURATELY CUT
SCREW
CONNECT STUB
DUCT TO
FLUE SOCKET OUTLET
ON TOP OF FLUE DUCT
HOUSING BEFORE MOVING
APPLIANCE INTO POSITION
;
r!~;;~C
2
LA~MPING
--18mm DEEP DIVERTER
AIR DUCT SOCKET
TO THE REQUIRED LENGTH
SEALING PLATE
ON FINAL
ASSEMBLY ENSURE ---------Jl'll
THAT SUPPORT SPIDER IS FITTED
OVER FLUE DUCT
AND PUSHED
AGAINST EXPANDED END
FLUE
DUCT--·-·-------~
AIR DUCT -----------;:.11
FIX WITH
SELF TAPPING
SCREWS~ II
(PROVIDED) ~
APPLY A BEAD OF SILICONE
SEALANT INSIDE THE
SOCKET ON FINAL ASSEMBLY
NOTE: H ~THE VERTICAL DISTANCE
MEASURED FROM THE BOTTOM
OF THE
AIR DUCT INLET SOCKET ON THE
APPLIANCE TO THE BOTTOM OF THE
DIVERTER.
OVERALL
LENGTH
H
SELF-TAPPING SCREWS
(PROVIDED)
BOTH SOCKETS REQUIRE
A} AIR DUCT
BEAD OF SILICONE SEALANT SOCKET
AROUND THE INSIDE ON FLUE DUCT-
FINAL ASSEMBLY SOCKET
[}-
!
CONNECT STUB DUCT TO
APPLIANCE FLUE DUCT
HOUSING BEFORE MOVING
APPLIANCE INTO POSITION AND
-INSTALLING VERTICAL FLUE ASSEMBLY
SEE FIG. 18
18

9.2b BOILER FLUE ASSEMBLY -
VERTICAL
2001~3000mm {78.8in-118.1 in)
For overall flue lengths between 2001 mm and 3000mm
(78.8in and 118.1in) use the standard flue kit plus ONE
extension flue kit only.
IMPORTANT NOTE: Where the ceiling height from appli-
ance floor level is below 2935mm (83in), nominal, it will
be necessary to reduce the lengths of the air ducts 'A'
and 'C', and the flue ducts 'D' and 'E' (Fig 21b) to avoid
the expanded end of air duct 'C' fouling the sealing plate
socket (Fig 19).
See
Section 9.2b.1 - otherwise proceed to Section 9.2b.2.
1. Overall flue lengths between (2001-2519)mm (78.8-
99in).
These flue lengths correspond to a nominal ceiling
height between (2416-2934mm) (95-115.5in) when
the diverter is fitted as shown in Fig 17.
(a)
Cut the air ducts 'A' and 'C' and flue ducts 'D' and 'E'
as follows:-
Determine the overall length 'H', Figs 17, 21a, 21b,
22.
This is the overall length of 110mm (4.3in)
diameter air duct required.
(b) Measure the ceiling height 'x' from appliance floor
level (Fig 21a).
Fig. 21a
SECONDARY
FLUE 125mm (5in)
DIAMETER
ROOF SPACE
SUBTRACT HALF
THE DISTANCE
'X'mm lin)
FROM 1468mm (57.8inl
FOR EXAMPLE:-
IF 'X' ~ 2280mm (90in)
SUBTRACT HALF OF 'X' ie
1140mm (45in) FROM
1468mm (57.8in)
LEAVING 328mm
(12.8in)
THIS IS THE CORRECT
AMOUNT TO CUT FROM
THE PLAIN ENDS
OF THE AIR DUCTS
'A' AND 'C' AND THE
FLUE DUCTS
'D' AND 'E'
140
250 (10in)
SEALING
PLATE
(6in)
CEILING HEIGHT
'X' FROM APPLIANCE
FLOOR LEVEL
'X'
=
-- =-
APPLIANCE FLOOR
To determine the amount to be cut from air ducts 'A' and
'C' and flue ducts 'D' and 'E' SUBTRACT HALF THE DIS-
TANCE
'X' FROM 1468mm (57.8in) (Fig 21a), CUT THE
SURPLUS FROM THE PLAIN END OF THE DUCTS.
Proceed to Section 9.2b.2a.
2. Overall flue lengths between (2520-3000mm)
(99.1-118.1in).
19
(a) Determine the overall lengths H. Figs 17, 21b, 22.
This is the overall length of 110mm (4.3in) diameter
air duct required.
(b) Assemble the air ducts as shown in Fib 21b. ReducH
the length of duct 'B' by cutting from the end with
holes until the required overall length, after engage-
ment with the other two ducts is obtained (Fig 21 b).
Using the two holes pre drilled in each of the three
socket ends as a guide, drill two 3mm diameter holes
through the ducts, using the drill provided. Diseng-
age the air ducts and apply a smear of silicone
sealant around the outside of the plain ends of the
ducts. Reassemble and secure with four self tapping
screws provided.
3. Cut and assemble the flue duct as follows:-
(a) Reduce the flue length to that used for the air ducts
i.e. H (Fig 21 ). This is the overall length of 60mm
(2.4in) diameter flue duct required.
(b) Assemble the flue ducts 'D' and 'E' and 'F' {Fig 21b).
(c)
Reduce the length of the flue duct 'F' only by cutting
from the plain end.
(d) Attach the stub duct, using the two holes pre drilled
in each of the three socket ends as a guide, drill two
3mm diameter holes through the ducts, using the
drill provided.
4.
Disengage the flue ducts and fit the two support
spiders (Fig 22).
Apply a smear of silicone sealant around the outside
of the plain ends of the flue ducts 'E' and 'F'.
Reassemble the flue ducts D, E and F and secure with
the self tapping screws provided (Fig 21 ).
(a) Apply a bead of silicone sealant around the inside of
the top flue outlet socket. Insert the end of the stub
duct without holes fully into the socket. Working
through the access hole in the upper front panel of
the casing, tighten the top flue outlet clamping
screw. (Figs 6 and 7). REPLACE THE ACCESS COVER.
(b) Partly assemble the flue air duct system as follows
(Fig 22). Slide the flue duct inside the air duct. When
positioned vertically for fitment as described under
3.c below the air duct sockets should be upward and
the flue duct sockets downward. The support spiders
should be positioned above the flue duct sockets.
Slide the sealing plate over the top end of the air
duct, before commencing to position the flue
assembly. Ensure the socket on the sealing plate is
looking down.
(c) Before positioning the boiler, push the top of the flue
assembly through the hole in the ceiling. Lift the
assembly far enough into the roof space to allow the
bottom of the flue duct to be supported, using a woo-
den batten between 950mm-1000mm (37.5in-39in)
long, off the ground. Ensure the supported assembly
is vertical.
(d) Refer to Fig 19. Lift the sealing plate up to the under
side of the ceiling and fix as described under Section
9.2.2.
(e) Lift the air duct assembly into the roof space, suf
ficient to allow the appliance to be positioned under
it and the flue duct supported as described in Section
9.2b.4.
Retain the air duct in position by tightening the seal·
ing plate clamping screw (Fig 19).
5. Ensure the assembly is vertical.
(a) RECHECK TO ENSURE THAT ANY STUB PIPE CON
NECTIONS REQUIRED HAVE BEEN
MADE (Section
9.3).
Move the appliance into position, just in front of the
supported vertical flue. Position the centre of the top
flue outlet socket in line with the supported flue
assembly.
Run a bead of silicone sealant around the inside of
the top air duct socket and around the open end of
the flue stub duct.

(b) Lift the vertical flue system assembly and remove the
wooden batten. Support the assembly by hand whilst
moving the appliance into its final position. Keeping
the outer air duct raised, lower the inner flue duct
sliding the socket end over the flue stub duct. Secure
with the two self-tapping screws provided (Fig 22).
(ii) Apply a smear of silicone sealant around the in-
side of the air duct socket at the bottom of the
diverter.
(iii) Slide the air duct and flue duct sockets at the
bottom of the diverter over the end of the air and
flue ducts.
(c) Slacken the sealing plate clamping screw and lower
the outer air duct sliding the end into the top air duct
socket.
6.
(a) Ensure the flue system is vertical. If necessary move
the appliance slightly to achieve this. When the flue
system is vertical check that the air duct and flue
ducts are fully home in their respective sockets at the
top and bottom of the vertical ducts, then tighten the
clamping screws.
(d) Working within the roof space fit the diverter to the
top of the flue system as follows:-
(i) Apply a bead of silicone sealant around the in-
side of the air duct socket at the bottom of the
diverter.
Now instal the secondary flue in accordance with
Section 8. Refer to Section 9.3.
Fig. 21 Vertical flue application
FOR OVERALL VERTICAL FLUE LENGTHS FROM 2001mm to 3000mm {78.8in to 118.81nl USE THE STANDARD
VERTICAL AND EXTENSION FLUE KITS. REFER TO FIG. 22
IMPORTANT· REFER TO INSTRUCTIONS IN SECTION 9.2b BEFORE CUTTING AIR OR FLUE DUCTS OR ASSEMBLING
AIR
DUCT- VERTICAL FLUE APPLICATION FLUE
DUCT· VERTICAL FLUE APPLICATION
OVERAL
SEES
9.
TOP
'
8
1
~
CONNECT TO OIVERTER ............
FLUE SOCKET ------~-----------... TOP
1--··---------
CONNECT TO DIVERTER
AIR SOCKET
REDUCE LENGTH
OF THIS
CTION
BY CUTTING SURP
ROM THIS END. ENSURE E
QUARE
AND FREE FROM 8
~
11'
SE
LUS
F NO
ISS
URRS
LY-
A
ANT
A
ON FINAL ASSEMBLY APP
SMEAR OF SILICONE SEAL
ROUND THE OUTSIDE OF T
ECTION AND FIX USING TW
LF-TAPPING SCREWS PROV
HIS
s 0
SE IDEO
1
F
r-
L LENGTH c
N-
R
DO NOT CUT THIS SECTIO
UNLESS SPECIFIED UNDE
SECTION 3.2b E OVERALL
I_
ENGTH
H
ECTION
2(3)
H
~s
ON FINAL ASSEMBLY APPL
MEAR OF SILICONE SEALA
AROUND THE OUTSIDE 0
HIS SECTION
AND FIX USI
TWO SELF-TAPPING SCREW
YA-_
r-
SEE
9
s~
1
~;l
TION
NT
-
jJ T F
NG
-
A
-
PROVIDED
DO
NOT CUT THIS SECTIO
UNLESS SPECIFIED UNDE
SECTION 9.2b
s
N
R
TH
IS JOINT IS NOT SEALED
CURED UNTIL THE MAIN FL
SEMBLY AND APPLIANCE A
N THEIR FINAL POSITIONS
OR
SE UE
AS RE
I
REFER SECTION 9.2b(41
-
v CONNECT TO
APPLIANC~
AIR DUCT INLET SOCKET
~ '~
FLUE STUB DUCT·~--
-~~
1--J
110mm (4.3in)
DIAMETER
T
CLAMPING SCREW-_
CONNECT TO FLUE SOCKE
OUTLET ON TOP
OF FLUE D
HOUSING BEFORE MOVIN
APPLIANCE INTO POSITIO
UCT
G
N I
D
-::a
:--
I
NOTE: H =The vertical distance measured from the bottom of the air duct inlet socket
on the appliance to the bottom of the diverter
20