404C960
-
02
for
the
Midas
Sfi
wall mounted combination gas boiler
G.C.
Appliance
No.
Midas
Sfi
47
494
04
IMPORTANT
FOR USE
WITH
NATURAL GAS ONLY.
Read these instructions thoroughly before
working
on the boiler.
Leave these instructions adjacent to the
gas
meter.
LIST
OF
CONTENTS
Section
1
2
-
-
3
4
5
6
7
8
9
10
11
12
13
14
Y
15
16
17
18
19
’20
21
22
23
24
25
Subject
Introduction
Method
of
operation
General requirements
Delivery
Electricity supply
Gas supply
Air supply
Flue system
Technical data
Boiler location
Wter and gas connections
Water system
Important installation notes
Sealed system requirements
Optional open system
Installation procedure
Commissioning
Balancing the system
a
Final assembly and handing over installation
Annual servicing
Replacement
of
parts
-,
-
Wiring diagrams
Fault finding guides
Exploded views
Short list spare parts
Page
3
3
3
3
-
3,
3
4
4
4
5
5
6
6
7
7
7
11
12
13
13
14
20
22
28
30
Page 2
If
you have any reason to complain of any shortage of components shown in frames 1,2 or
8,
supply a list of the item@)
concerned,
boiler
model,
your name, address and any information which may help us to avoid any further error.
Address
for
retum:
Sf”
Administration Manager,
CWEon
Components
Ltd
Earfsway,
Team Valley Trading Estate,
GATESHEAD, Tyne
&Wear, NE1 1
OM.
3
.y-
.A
c
-
.”
‘.
1.
INTRODUCTION
The Midas Sfi is a fanned balanced flue combination boiler supplying a maximum of
100,OOO Btu/h for domestic hot
central heating.
The temperature of domestic hot water and central heating are both adjustable by the User.
Incorporated
as
standard is a programmer for control of the central heating periods of operation.
To enable the boiler to be positioned remote from an outside wall the boiler will operate with horizontal flue lengths
3
metres. The Midas Sfi is a little unusual in that it incorporates a micro processor which provides a high level of
control. It is advisable to read carefully the following instructions which explain the operation of the boiler.
water or
of up to
accurate
When the mains electricity supply is first switched on, the boiler takes
30
seconds to respond whilst the micro processor ‘reads’
the boiler sensors. However, the boiler is equipped with a
‘Purge/Normal’ switch which, in the Purge mode allows either of the
two pumps to operate instantly under the control of the selector switches. This function, which is useful for removing air from
the system will not allow the boiler to fire and, after venting, the switch should be retumed to ‘Normal’.
2
METHOD
OF
OPERATION
The Midas Sfi combination boiler operates in two distinctive modes; Central heating and Domestic hot water, see page 6. It
will not supply heating and hot water at the same time, priority will always be given to hot water. Therefore
if
a hot water tap
is tumed on when the boiler is operating to provide central heating, the central heating will be interrupted until the hot water
tap is tumed off and the hot water store has again reached temperature.
Central
heating
mode
When the central heating is switched on either by the programmer or room thermostat, water from the central heating system
passes into the main heat exchanger and is heated by the burner to a minimum of
50°C and a maximum of 82°C as selected
by the user control.
For the first
5
minutes of operation the boiler operates on low fan speed and at a fixed low gas rate to provide an output of
35.OOO
Btu/h.
If
after 5 minutes the central heating control thermostat or room thermostat have not been satisfied the boiler will change to
high fan speed and high gas rate. The gas rate will then modulate to suit the system demand. Should the modulated rate reduce
to
35,OOO
Btu/h the fan will revert to low speed, the gas to fixed low rate and a further 5 minute run will commence.
If during the
5
minute run at low setting the central heating thermostat or room thermostat are satisfied, then the boiler will
remain off for the remainder of the
5
minutes. After that time the boiler will commence a further run for 5 minutes at low fan
speed and low gas rate and this process will continue.
This arrangement ensures that the boiler operates for most of the time on the majority of systems at low input thereby preventing
rapid cycling, minimising noise and maximising efficiency.
After a demand for central heating an automatic 10 minute central heating pump overrun takes place.
Domestic
hot water
When a hot water tap is turned on a sensor within the secondary heat exchanger on the mains inlet side activates the hot
water pump and fires the boiler to meet the demand. Water is pumped rapidly through the main heat exchanger to the secondary
heat exchanger where is passes over a series of coils and back to the main heat exchanger for reheating.
Cold water enters the boiler and passes through the secondary heat exchanger (where heat is transferred), over another sensor
and onto the hot water tap. The burner pressure is automatically modulated to maintain the desired temperature selected by
the User. The boiler
will
always respond to a demand for hot water by running the fan at high speed and initially the
gas
rate
at
maximum input.
If
the central heating is operating at the time, it will be interrupted whilst the boiler supplies hot water and resume operation
when the hot water tap is turned off. Should the interruption occur during the
5
minute ‘low fan, low gas’ time the boiler will
complete the remainder of the
5
minutes when returning to central heating. However, should the boiler be operating on ‘high
fan, high gas’ to provide central heating at the time the interruption occurs it will return immediately to this setting when retuming
to central heating.
To prevent too much water passing through the boiler a flow regulator
preset at 10 litreshin has been positioned alongside
a filter in the inlet of the boiler. Too much water results in water delivered to the tap not being hot enough.
reheat of the secondary heat exchanger is at a low burner pressure and fan speed to minimise noise. The hot water may be
switched off and the cycling stopped by switching the HW switch to the ‘OFF‘ position, if
so
desired. The HW selector switch
must be turned back to the ‘ON’ position when hot water is required.
After a reheat of the secondary heat exchanger a
30
second domestic hot water pump overrun takes place. However, after a
hot water
drawoff a 10 minute low fan overrun in conjunction with
30
second domestic hot water pump overrun takes place.
3.
GENERAL REQUIREMENTS
The boiler must be installed in accordance with: The
Gas
Safety (Installation and Use) Regulations 1990, Building Regulations,
Building Standards (Scotland) Regulations,
Local
Building Regulations, Model and local Water Undertaking Byelaws and the current
IEE
Wiring Regulations.
Detailed recommendations are stated in the following British Standard Codes of Practice:
BS6891:1988, BS6798:1987, BS6700:1987,
Bs5546:1990, Bs0440:1:1990, BS5440:2:1989 and B!3449:1990.
NOTE: Gas
Safety
Installation and Use Regulations
1990:
It is law that all gas appliances are installed by competent persons
in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution. It is in your own
interest, and that
of
safety to ensure that the law is complied with.
4.
DELIVERY
The unit is delivered in two packages:
(1).
The boiler pack which contains the uncased boiler and the casing kit pack.
5.
ELECTRICITY SUPPLY
240V-50Hz via a fused double pole switch with a contact separation of at least 3 mm in both poles or preferably a fused
3
pin plug and shuttered outlet socket (both complying with requirements of BS1363) adjacent to the boiler.
Fuse the supply at 3A. The minimum requirement for the power supply cable is that it should be a PVC sheathed flexible cord
at least 0.75
mm2
(24
x
0.2
mm) (code designation H05 VV-F or H05 VVH2-F) as specified in table 16 of BS6500:1984.
All
wiring extemal to the boiler shall comply with the latest
IEE
Wiring Regulations, and any local regulations which apply.
The
applii
must be earthed.
In the event of an electrical fault after installation of the appliance, preliminary electrical systems checks must be carried out
i.e. Earth Continuity, Polarity, Short Circuit and Resistance to Earth.
6.
GASSUPPLY
The Midas Sfi requires
3.4
mYh (120 ftVh) of natural gas (the input after 10 minutes use at maximum). The meter and supply
pipes must be capable of delivering this quantity of gas in addition to the demand from any other appliances in the house.
Note:
If
the gas supply to the boiler is used to supply other appliances then use 22 mm pipe. If the last 2 metres to the boiler
The complete installation must be tested for gas soundness and purged
as
described in BS6891.
To deliver hot water ‘instantly’ the secondary heat exhanger is kept hot. To maintain this, the boiler will periodically cycle. This
\
(2). The flue/terminal assembly type, A, B, C, D and E as required.
is free from junctions then it is possible to use 15 mm pipe.
Page 3
Maximum central heating input
Minimum central heating input
(m-on)
Maximum central heatina output
36.6
kW
(125,000
Btdh)
13.2
kW
(45,000
Btu/h)
29.3
kW
(100.OOO
Btu/h)
I
Maximum burner pressure
I
16.0
mbar
(6.4in
wa)
I
Minimum central heating output (modulation)
Maximum hot water input
Maximum hot water output
I
Minimum bumer txessure Imodulation)
I
1.8
mbar
f
0.2
10.7in wa
f
0.1)
I
9.5
kW
(32,500
Btu/h)
36.6
kW
(125,000
Btu/h)
29.3
kW
(l00,OOO
Btu/h)
Bumer type
Bumer injector
Pilot injector
I
Pilot flame
I
35 to
40
mm
Iona
I
Furigas
175-500424
or Bray
AB24016M
Furigas
515-001-136
marked
470
Honeywell
4500-41o8-005
marked
56142A
spark gap
Ignition
Weight (empty)
Lifting weight (installing)
I
Watercontent
I
4.0
litre
10.8
aal)
I
~
3.0
to
4.0
mm
Intermittent Pilot
64
kg
(140
Ib)
56
ka
(123
Ib)
Max. heating system temperature
Max. domestic hot water temperature
Max. nominal domestic hot water flow
'Domestic hot water performance
~~
82°C
f
2°C
65°C
f
2°C
10.0
litreshin
(2.2
gal/min)
9.3
litres/min
12.06
aal/min) raised 45°C
12.0
litreshin
(2.65
aal/min) raised 35°C
I
Max.
heatina
system water cawcitv
I
200
litres
144
aal)
I
Max. mains water inlet pressure
Min. mains water inlet pressure
Max. heating system water pressure
Min. heating system water pressure
10
bar
(145
Ibf/in2)
0.9
bar
(13.0
Ibf/in2) (see note in frame
22)
3
bar
(44
Ibf/in2) (see section
14)
0.5
bar
(7
Ibf/in2)
I
Clearance required: top
I
50
mm
(2
in)
I
Height
(case)
Width
(case)
Depth
900
mm
(35Vz
in)
480
mm
(18%
in)
350
mm
(13%
in)
I
water connections
I
15
mm
and
22
mm
com~ression fittinas
I
Clearance required:
bottom
Clearance required: front
Clearance required: sides
Flue terminal size
150
mm
(6
in)
610
mm
(24
in)
10
mm
(3%
in)
100
mm
dia
x
65
mm
deep
(4
in dia
x
2%
in deep)
Gas connection
Page 4
Rc%
Data plate position
Behind case front, right of centre
80,000
gQ000
loo,o0o
-
-
- -
15.93
21
0
2.0 6.6 23.4
-
-
-
-
17.92
235
1.6 5.3 26.4
-
-
- -
19.91 265
1
.o
3.3 29.3
10.
BOILER LOCATION
The boiler is not suitable for external installation.
The boiler must be mounted on a flat wall which is sufficiently robust
to
take the weight of the boiler.
The boiler is suitable for installation to a combustible wall e.g. wood cladding, provided that the
aidflue tube assembly is
not closer than
25” (lin) to combustible material. A metal sleeve should be installed to surround the air/flue tube assembly
to provide a
25” (lin) annular space. Further guidance is given in BS5440:1:1990, sub-clauses
3.3
and 4.2.5.
If
the boiler is
to
be installed in a timber framed building it should be fitted in accordance with the British Gas publication - “Guide for
Gas Installation in Timber Framed Housing” reference DM2.
If
in doubt advice must be sought from the local region
of
British Gas or
from Myson Heating.
The boiler may be installed in any room, although particular attention is drawn
to
the requirements of the latest IEE Wiring
Regulations and, in Scotland, the electrical provisions of the building regulations applicable in Scotland, with respect
to
the
installation of the boiler in a room containing a bath or shower.
Where a room
-
sealed appliance is installed in a room containing a bath or shower, any electrical switch or appliance control utilising
mains electricity should be
so
situated that it cannot be touched by a person using the bath or shower.
Where the installation of the boiler will be in an unusual position, special procedures may be necessary and
BS6798 and 885546
give detailed guidance on this aspect.
A
cupboard or compartment used
to
enclose the boiler must be designed and constructed spcifically for this purpose. An existing
cupboard or compartment may be used provided that it is
modified for the purpose. Details of essential features of
cupboard/compartment design including airing cupboard installations are given in BS6798
itnd
BS5546 and should be complied
with.
If
the boiler is
to
be installed in a run of kitchen units it is recommended that the boiler is
fitted
Ccst
or the adjacent units removed.
The boiler must be installed
so
that the flue terminal is exposed
to
the external air.
It
is imprrrtant that the position of the terminal
allows the free passage of air across it at all times.
Terminal Position
Directly below an openable window, air vent or any other ventilation opening
Below gutters, soil pipes or drain pipes
Below eaves
or
balconies
Above adjacent ground or balcony level
From vertical soil pipes or drain pipes
From an external or internal corner
From a surface facing the terminal
From a terminal facing the terminal
Vertically from a terminal on the same
wall
Horizontally from a terminal on the same wall
Adjacent to an opening window
From an opening in a car port
i.e. door or window into the house
Minimum Spacing
300
mm
(1
2 in)
75
mm
(3
in)*
200
mm(8 in)*
300
mm
(1
2 in)t
75
mm
(3
in)
25
mm
(1
in)
600
mm
(24 in)
1200
mm
(48 in)
1500
mm
(60
in)
300
mm
(1
2
in)
150
mm
(6
in)
1200
mm
(48
in)
*
If
the terminal is fitted within 850 mm (34 in) of a plastic or painted gutter/pipe or 450 mm
(le
in)
of
painted eaves, an aluminium
shield of at least 750
mm (30 in) in length should be fitted
to
the underside of the gutter/pipe
or
painted
surface.
t
If
the terminal is fitted less than 2 m (6.6
ft)
above a balcony, above ground or above
a
flat
roof
to
which people have access then
a
suitable terminal guard must be provided and fitted.
A
type KI protective guard is available from Tower Flue Components Ltd. at: Vale
Rise,
Tonbridge, Kent TN9 1TB. Tel:
0732
351555. The guard must be securely fitted to the wall and centrally located over the
flue
‘terminal. Refer to the Manufacturers
instructions.
11.
WATER AND GAS CONNECTIONS
All water connections are centred 40
mm from the wall. Compression fittings are supplied
to
accept
22
mm and 15 mm copper
tubing
to
882871.
Note: All water connections
(5)
at the bottom of the boiler have been temporarily sealed with plastic plugs. Remove ALL
FIVE
plugs
’
before any fittings are connected.
heating
return
water valve
inlet discharge
-
-
Page
5
12. WATER SYSTEM
Central Heating On
/
b'
radiators
Pump isolation
t
valves
From
radiators
e
Domestic Hot Water On
Mains inlet
isolation valve
Hot water
sensors
4
+
out
Hot
water
Mains water in,
lnline filter and
flow
regulator
housing
13. IMPORTANT INSTALLATION NOTES
1.
A system by-pass is included
in
the Midas Sfi boiler.
2.
Ensure that the isolating valves are open.
3.
Mains electricity must always be connected to the boiler.
4.
5.
6.
7.
8.
9.
10.
11.
The water connections must be connected
as
shown
in
the water system schematics.
The maximum working pressure of the Midas
Sfi
is
10 bar
(145
Ibfhn2).
If
the mains water pressure is likely to exceed
this, a pressure reducing valve must be fitted to the
cold
water inlet.
When Commissioning, the system and boiler must be vented and the pump running before the main bumer is lit.
The system must be flushed
twice;
initially cold with all valves open, and then after the first heating.
In
areas with
hard
or aggressive water we recommend that an inhibitor
should
be used for example Femox CP3.
See Commissioning Instructions for details of use.
If used
on
open system a link must be connected between L1 & P1 on terminal
Mock
If there is a device which prevents the expansion of domestic water or
if
the domestic water supply
is
metered then a
device
must
be
fitted which will allow for the expansion of water.
If
the domestic water inlet pressure is less than 1.3 bar, the flow regulator can be removed to achieve the
full
flow rate
I__-
1
__-..
CL.
14.
SEALED SYSTEM REQUIREMENTS
1.
The installation must comply with the requirements of BS6798 and BS5449.
2. A safety valve set to operate at 3 bar (45 Ibf/in2) and a pressure gauge covering the range
0-4
bar
(0
to
60
Ibf/in2 are
incorporated within the boiler.
3.
A 12 litre expansion vessel to BS4814 is fitted and pre-charged
to
0.5
bar (7.5 Ibf/in2) is suitable for a system with a
maximum water content of 120 litres (27 gal). An additional expansion vessel can be installed
in
the central heating system
if required, refer to
835449
Table
3
to
calculate the size of the vessel.
4. Water lost from the system shall be replaced from a make-up vessel, and non return valve, mounted higher than the
top of the sytem and connected as shown
in
fig. A. Where access to a make-up vessel would be difficult, make-up
CE~
be provided by pre-pressurising the system to 1.5 bar
(22.5
Ibf/in2) cold - see fig.
B.
Note: Stop valves must comply with the requirements of BS1010:2.
1
Heating
-
~ ~
'"%~~I~l
I
Heating
cM
ch:Ft
system system
Stop valve Non-return Non-return Test
t-7-
valve valve cock Hose unions
Fig
A
Fig.
6
15.
OPTIONAL OPEN SYSTEM
This unit can be installed in an open system
if
required, in which case refer to frame 4 in the following installation procedure.
16.
INSTALLATION PROCEDURE
OPEN THE MAIN BOILER PACK
The Midas Sfi is received in two packs. unpack the larger of
the two. Remove the outer panels pack and place to one
side, and check for the following contents.
Bt3
22
mm isolation valves
(2)
15
mm isolation valve
filter and flow regulator
1
22
mm nut and olive
0
0
Open system plate
I.0.l
M6
screws and washers
9
9
3
9
(4
of
each)
Q
Q
Flue gasket
Template
Flue sleeve Wall mounting plate
BOILER DIMENSIONS
Clearances
required for
servicing:
Top:
50mm
Bottom: 150
mm
Front:
610
mm
Side: 10 mm
All
dimensions in
mm.
-
480
-4
Note:
If
the boiler is to be installed in a run of kitchen units
it
is
recommended that the boiler is fitted first or the adjacent units
removed.
CHECK THE OUTER PANELS PACK
The outer panel pack contains the outer front and side
panels together with the facia cover and bottom panel.
Keep these to one side in their packing until required.
The illustration shows how they will eventually be fitted to
RH Side Dane1
iler chassis.
the boi
DO NOT
ASSEMBLE
NOW.
,
(3
screws
-t
G
LH Side
panel
+
2
studs)
Bottom
oanel
OPTIONAL OPEN SYSTEM
1.
Remove inner case front and fan assembly, see frame
6.
2.
Remove cover plate
(2
screws), taking care not to damage
gasket. Discard plate only.
3.
Replace with open system plate supplied.
4.
Loosen nut retaining the air vent Dsicard.
5. The unit will now accept a
22
mm pipe, the room seal point being
maintained by the plate gasket. Supplied with the boiler is an
extra
22
mm nut and olive to connect the
22
mm combined cold
feed and vent.
Page 7
I
REAR
EXIT
FLUE - use Frames
5
to
12.
For
Side
Exit Flue use Frames
13
to
18.
hole and the 5 fixing holes for
the wall mounting plate.
3.
Cut the 115
mm
(4% in) dia.
hole in the wall and drill and
plug the fixing holes to accept
2%” lg.
No.
12 woodscrews.
THE
WALL
All
dimensions in
mm
1-310-1
Flue
hole
dia.
Q
Wail mounting
plate
I
SECURE THE BOILER TO THE WALL
PLATE
1
1. The boiler has
two
flanges
I
2.
3.
4.
on the back of the chassis
at the top. These are to be
hooked over the top of the
wall mounting plate to take
the boiler’s weight.
With a man either side
lift
the boiler onto the wall plate.
Secure to wall plate using
the 4 screws and washers
supplied.
Remove the protective
bottom plate (4 screws) and
discard plate, retaining the
screws.
ADJUST THE LENGTH OF THE FLUE/
TERMINAL ASSEMBLY
Seal this joint
with tape supplied Pilot holes
(3
off)
Air tubs
Flue
tube
I
Keep seams in line
Finished wall thickness + 25mm
(1
in)
1.
Adjust the length of the fluehermina1 assembly
so
that it is 25
mm
(1 in) plus the finished wall thickness, from the back
of
the
terminal flange to the end of the OUTER air tube as shown.
Note:
Ensure that the seams in the outer air tubes are in line.
2. Drill through the three pilot holes, shown above, with a 2.8
mm
drill and secure the
two
tubes together using the three
No.
8 x
10 lg screws supplied with the
flue/terminal assembly.
Note:
When drilling through the outer air tube take care not to
damage the inner flue tube with the drill.
3.
Seal the centre joint with the tape supplied.
PREPARE THE BOILER
1.
Remove inner
case
front (4 screws).
2. Disconnect the
%way plug from the air flow Sensor and the
3.
Remove2screwssecuringfan
assembly
base
platetoflue hood.
4. Remove 4
screws
securing flue hood to the combustion chamber.
5.
Carefully slide flue hood out from under the fan assembly (take
care not to damage the gasket on the
base
of the fan assembly,
renew if necessary before reassembly), then remove fan
Sway plug and socket for the fan motor leads.
assembly.
Fan
Flue tube sleeve
(rear exit shown)
\
UNPACK THE FLUE TERMINAL
ASSEMBLY
Carefully unpack the flue terminal assembly.
Do
not discard the
packing until all the items are found.
‘0’
Qcn
ring
Clamping ring
(2
off)
Outer wall plate
M4 x 25
mm
lg screws
No.
8
x
1”
lg stainless
screws (4 off)
(4
off)
Outer sealing plate
Qkk
No.
8
x
10
mm
lg screws
Sealing tape
(3
off)
FIT THE FLUUTERMINAL
ASSEMBLY
(1)
Note:
If the wall is to be made good up to the terminal the outer wall
plate need not be used.
1. Fit the outer wall plate over the fluehermina1 assembly.
2. From outside the building insert the
flue/terminal assembly into
the wall. Ensure that the slots in the end
of
the terminal are
vertical.
Mer
FIT THE FLUWERMINAL
RE-ASSEMBLE THE BOILER
tube and in front of the swaged section.
4. Secure the
flue/terminal assembly to the boiler using the
two
halves of the clamping ring as shown below. Ensure that the
of the air tube.
1.
Decide upon the position of the boiler. Note that the maximum
distance (using the longest flue/terminal assembly and
two
flue
extensions) from the side of the white case
to
the OUTSIDE wall
is3012mm (li81/~in.)
mounting fixing holes, the side of the boiler and the horizontal
centre line of the flue. See frame
5.
3. Continue the horizontal flue centre line across the wall and
around onto the side wall. Ensure these lines are level.
4. On the side wall, mark the vertical centre of the flue exit hole. This
2. Using the template provided, mark the positions of the wall
5. Check that the terminal position will meet the requirements given
6.
Drill and plug the five wall mounting plate fixing holes to accept
2%’’
lg No. 12 woodscrews.
7. Cut the 115
mm (4% in) dia. hole in the side wall for the
flue/terminal assembly in the position previously marked.
8.
Make a note of the finished wall thickness and the distance from
the side wall to the side of the white case. These measurements
are very important and are required in frame 15 when adjusting the
flue/terminal assembly.
woodscrews (not supplied). Ensure it is level and the right way up.
9.
Secure the wall mounting plate in position with five 2W‘ lg No. 12
I
175
in wall for flue
(1
15
mm
(4%
in) dia.)
/
(LH flue illustrated)
Wall mounting plate
Spirit level
I
PREPARE AND FIT THE BOILER
El
1. Prepare the boiler and
secure to the wall mounting
Edge clips
plate as described in
frames
6
and 7.
2. Unpack the
fluekerminal
assembly as frame
8.
3.
Open the outer panels pack
and take the side panel
appropriate for a LH or
RH
exit flue.
4.
Push out the round infill
panel after removing three
edge clips.
5.
Fit the top edge of the side
panel into position as
shown.
6.
Secure side panel with top
screw at this stage.
sideparL
hail
(LH flue exit illustrated.)
ADJUST THE LENGTH OF THE FLUE/
TERMINAL ASSEMBLY
Seal this joint
with tape supplied Pilot holes
(3
off) Air tube
\/
Flue
‘\If
tube
Y
I
I
Keep seams in line
I
I-
Finished wall thickness
+
B
+
28
mm
(1
’/a
in)
I
(B=distance between the wall and the side of the boiler case)
1.
Using the measurements noted in frame 13, adjust the length of
the
flue/terminal assembly as shown above. Measurements
should be taken from the back of the terminal flange to the end of
the OUTER air tube as shown.
Note:
Ensure that the seams in the outer air tubes are in line.
2. Drill through the three pilot holes shown above, with a 2.8 mm drill
and secure the
two
tubes together using the three No.
8
x
10 lg
screws supplied with the fluekerminal assembly.
Note:
When drilling through the outer air tube take care not
to
damage the inner flue tube with the drill.
3.
Seal the centre joint with the tape supplied.
~
Page
9
FLUE EXTENSION
The flue extension kit allows
the standard
flue/terminal assembly to be extended by 965
-mm
(38 in) with one kit.1930mm (76 in) with
two
kits.
A maximum of
two
flue extensions may be used,
if
required.
Seal this joint
5
mm
with tape supplied
-7
p-
,
Drill 3 holes (2.8 mm dia.)
Extension
'
Keep seams ' Standard flue/terminal
in line assembly
1.
If
the flue extension kit is used, connect the plain end of the
extension to the swaged end of the standard flue/terminal. Ensure
that the inner flue tube of the standard flue/terminal fits INSIDE
the inner flue tube of the extension and the outer air tube fits
OVER the air tube of the extension. Push fully home.
Note:
Ensure that the seams in the outer air tubes are in line.
2. Drill three equally spaced holes using a 2.8
mm
drill in the
position shown, through both the standard
flue/terminal and the
extension tube sleeve. Secure the two tubes together using the
three No. 8 x
10
lg screws supplied with the flue extension.
Note:
When drilling through the outer air tube take care not
to
damage the inner flue tube with the drill.
3.
Seal the joints with the tape supplied with the flue extension.
4.
Adjust the OVERALL length as described in frame
15.
Secure
and seal the joints.
REASSEMBLE THE BOILER
For both side exits the fan base plate has to be rotated
90"
anticlockwise relative to the fan (viewed from below).
Turnover the fan assembly and undo the
4
fixing screws holding the
fan to the fan mounting plate, taking care not to damage either of
the two gaskets, turn the fan mounting plate
90"
anticlockwise and
secure to the fan with the
4
screws.
For
Right
Hand
Exit
1.
Position fan assembly Over heat exchanger with its outlet pointing
towards the flue exit hole.
2. Push flue tube sleeve onto fan outlet.
3.
Carefully slide flue hood under the fan assembly, taking care not
to damage the gasket on the base of the fan assembly, with the
air flow sensor left of the fan.
FIT THE FLUE/TERMINAL
ASSEMBLY
1.
Remove the 4 screws, sealing plate and gasket from the side
through which the flue is to exit and use to seal the rear exit.
2. The flue is fitted in the same way as described in frames
10
and
1 1
but is secured to the chassis side from inside the fan
compartment. (For ease of installation fit the lower half first.)
Note:
Ensure that the gasket has the edge with the corners
removed towards the front of the boiler.
Sealing plate and gasket
11
'
(LH
flue illustrated)
Flue gasket
Fan assembly RIGHT HAND FLUE
I
LEFT HAND FLUE
4.
Fit the free end of the flue tube sleeve over terminal inner tube and secure
Note:
The outer sealing plate need not be used
if
the wall
is made good up
to
the terminal.
1.
Connect gas supply via a straight connector to the
service cock. (It will be necessary to lower the control
1. Place the outer sealing
plate over the terminal and
mark the position of the four
fixing holes.
2.
Remove the sealing plate
and drill and plug the fixing
holes, suitable for 1
"
lg
No. 8 woodscrews.
Note:
The terminal should
be covered before drilling to
prevent debris entering the
terminal.
3. Remove any covering from
the terminal. Position the
sealing plate over the
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