Formosa Fires Prevail Installation and operating instructions

Prevail
INSET COAL EFFECT GAS FIRE
Installation & Maintenance Instructions
Handtheseinstructionstotheownerfollowinginstallation,they
mustberetainedforfuturereference.
Model No’s ANVC**MN & ANVC**SN are for use on Natural Gas (G20)
at a supply pressure of 20 mbar in G.B. / I.E.
** denotes variant of trim / fascia where applicable

2
CONTENTS
Section 1 Information and Requirements PAGE
1.0
Appliance Information
3
1.1
Conditions of Installation
4
1.2
Flue and chimney suitability
4
1.3
Fireplace / surround suitability
5
1.4
Shelf position
5-6
1.5
Chimney inspection
5
1.6
Fire place opening / catchment space
6
1.7
Fitting to chair bricks
8
1.8
Precast flues
8
1.9
Metal flue boxes
8
1.10
Hearths
9
1.11
Spillage monitoring system
9
Section 2 Installation of Fire
2.1
Unpacking the fire
10
2.2
Installing the fire box
10-18
2.3
Gas tightness and inlet pressure (MC models)
19
2.4
Gas tightness and inlet pressure (SC models)
19
Section 3 Assembling Fuel Bed and Commissioning
3.1
Assembling the ceramics and fuel bed (coal models)
20-24
3.2
Assembling the ceramics and fuel bed (pebble models)
25-28
3.3
Lighting the appliance (MC models)
29
3.4
Lighting the appliance (SC models)
29-30
3.5
Checking for clearance of combustion
30
products
Section 4 Maintenance
4.1
Removal of the burner assembly (manual models)
31
4.2
Removal of the piezo Igniter
31
4.3
Removal of the control tap
32
4.4
Removal of the pilot assembly
32
4.5
Removal of the burner assembly (slide models)
32-33
4.6
Removal of the battery Ignitor
33
4.7
Repacing the battery
33-34
4.8
Removing the oxy-pilot assembly
34
4.9
Replacing the control cable
34-35
This appliance is manufactured by:-
Formosa Fires.

3
SECTION 1
INFORMATION AND REQUIREMENTS
1.0 APPLIANCE INFORMATION
Model ANVC**MN & ANVC**SN
Gas Type G20
Main injectors (2 off) Size 235
Pilot Type S.I.T. Oxystop
YA OP 9022 (MC)
YA OP 9055 (SC)
Max. Gross Heat Input : 6.5 kW
Min. Gross Heat Input : 4.2 kW
Cold Pressure : All Models - 20.0 +/-1.0 mbar
Ignition : Push-button Piezo (MC Models)
1.5V Battery Generator (SC Models)
Electrode Spark Gap 4.0mm
Weight (without fender) MC Models 10.0 kg
SC Models 11.0 kg
Fire box dimensions (with standard trim fitted)
Width :
(with standard trim)
498mm
Height :
(with standard trim)
600mm
Depth :
Depth :
(overall-without fender)
Flush-fit (from mounting face to rear)
140mm
100mm
Gas Connection 8mm Compression (Supplied with fire)
EfficiencyDeclaration
The efficiency of this appliance has been measured as specified in
BS 7977-1 : 2002 and the result is 51.5%.
The gross calorific value of the fuel has been used for this efficiency
calculation.
The test data from which it has been calculated has been certified by BSI.
The efficiency value may be used in the UK Government’s Standard Assessment
Procedure (SAP) for energy rating of dwellings.

4
INSTALLATION REQUIREMENTS
1.1 CONDITIONS OF INSTALLATION
It is the law that all gas appliances are installed only by a GAS SAFE registered
Installer, in accordance with these installation instructions and the Gas Safety
(Installation and Use) Regulations 1998 as amended. Failure to install appliances
correctly could lead to prosecution. It is in your own interest and that of safety to
comply with the law.
The installation must also be in accordance with all relevant parts of the Local and
National Building Regulations where appropriate, the Building Regulations
(Scotland Consolidation) issued by the Scottish Development Department, and all
applicable requirements of the following British Standard Code of Practice.
1. B.S. 5871 Part 2 Installation of Inset Live Fuel-Effect Gas Fires
2. B.S. 6891 Installation of Gas Pipework
3. B.S. 5440 Parts 1 & 2 Installation of Flues and Ventilation
4. B.S. 1251 Open fire place components
5. B.S. 715 Metal flue pipes for gas appliances
6. B.S. 6461 Part 1 Installation of Chimneys and flues
7. B.S. E.N. 1858 Chinmeys Components & Concrete Flue Blocks
8. I.S. 813 : 1996 Domestic Gas Installation (Republic of Ireland)
No purpose made additional ventilation is normally required for this
appliance, when installed in G.B. When Installing in I.E. please consult
document I.S. 813 : 1996 Domestic Gas Installation, which is issued by the
National Standards Authority of Ireland. If installing in Northern Ireland,
please consult local building regulations. Any purpose made ventilation
must be checked periodically to ensure that it is free from obstruction.
1.2 FLUE AND CHIMNEY SUITABILITY
This appliance is designed for use with conventional brick built or lined chimneys
and fabricated flues and metal flue boxes conforming to BS 715 / BS EN 1856-2.
All flues must conform to the following minimum dimensions.
Minimum diameter of circular flues 125 mm (Without Flue
Restrictor Fitted)
Minimum effective height of all flue types 3 metres
When fitting to conventional chimneys or 175mm flues it may be desirable to
fit the flue restrictor baffle (supplied) to reduce the flue flow and increase the
efficiency of the fire. Safe clearance of products must always be checked by
carrying out a smoke match test as described.

5
1.3 FIREPLACE / SURROUND SUITABILITY
The fire must only be installed on a hearth it must not be installed directly onto
carpet or other combustible floor materials.
The fire is suitable for fitting to non-combustible fire place surrounds and
proprietary fire place surrounds with a temperature rating of at least 150oc.
If a heating appliance is fitted directly against a wall without the use of a fire
surround or fire place all combustible material must be removed from behind
the trim. Soft wall coverings such as blown vinyl, wall paper etc. could be
affected by the rising hot air and scorching and/or discoloration may result.
Due consideration should be made to this when installing or decorating.
1.4 SHELF POSITION
The fire may be fitted below a combustible shelf providing there is a minimum dis-
tance of 200mm above the top of the fire and the shelf does not project more than
150mm. If the shelf overhangs more than 150mm the distance between the fire
and the shelf must be increased by 15mm for every 25mm of additional overhang
over 150mm.
1.5 FLUE / CHIMNEY INSPECTION
Before commencing installation, a flue or chimney should be inspected to ensure
that all the following conditions are satisfied.
1. Check that the chimney / flue only serves one fire place and is clear of any
obstruction. Any dampers or register plates must be removed or locked in
the open position.
2. Brick/stone built chimneys or any chimney or flue which has been used for
an appliance burning fuel other than gas must be thoroughly swept. The
base of the chimney / flue must also be thoroughly cleared of debris etc.
3. Any under-floor air supply to the fire place must be completely sealed off.
4. Ensure that the inside of the chimney / flue is in good condition along it’s
length and check that there is no leakage of smoke through the structure
of the chimney during and after the smoke pellet test. With pre-cast flues
it is especially important to check the inside of the flue for extruded
cement / sealant protruding from the joints between the flue
blocks. If present, these should be removed by rodding the flue
before proceeding with the installation.
5. Using a smoke pellet, check that there is an up-draught in the chim
ney / flue and that the smoke can be seen issuing from the terminal /
chimney pot outside.

6
There must be no leakage of smoke through the structure of
the chimney during or after the smoke pellet test and it is
important to check inside upstairs rooms adjacent to the chimney /
flue. Check the chimney pot / terminal and general condition of the
brickwork or masonry. If the chimney or flue is in poor condition or if
there is no up-draught do not proceed with the installation. If there is a
history of down-draught conditions with the chimney / flue, a tested and
certificated flue terminal or cowl suitable for the relevant flue type should
be considered.
6. A spillage test must always be carried out during commissioning of
the appliance.
1.6 FIRE PLACE OPENING AND CHIMNEY CATCHMENT SPACE
The front opening of the fire place must be between 330 and 430 mm wide, and
between 550 and 565mm high. If the opening exceeds these dimensions then a
surround must be constructed from suitable non-combustible material to produce a
correct size opening. Any surround must be suitably sealed to the fire place to
prevent leakage. See below in figure 1.
Fig. 1 520mm Minimum
Fire Opening
Minimum Flat
Sealing Area
550mm Minimum
565mm Maximum
610mm
Minimum
330mm Minimum
430mm Maximum
When installing into a brick built chimney, you must ensure that there is sufficient
depth to accomodate any debris which may fall from the chimney. This depth
must be sufficient to accomodate 12 litres of volumetric space.

7
Table A - Installation Depth Requirements for a Formosa Fires Prevail being
installedintoabrickbuiltchimney,requiring12.0litresofdebriscollection volume
Opening Width (mm) Minimum Depth Required (mm)
330 (minimum opening width)
183
340
178
350
173
360
170
370
167
380
163
390
158
400
155
410
151
420
146
430 (maximum opening width)
143
For example, if the appliance was to be fitted into a 400mm wide opening, the
depth required would be 155mm. See figure 2 below for explanatory diagram.
Fig. 2
Depth Required
(e.g. 155mm)
Opening Width ( e.g. 400mm)

8
1.7 FITTING TO FIREPLACES WITH EXISTING CHAIRBRICKS AND
CONVENTIONAL BRICKBUILT CHIMNEYS
This appliance is suitable for use in fireplaces fitted with an existing chairbrick
without the need for removal of the chairbrick, providing the minimum depth of the
fireplace exceeds 190mm. If the depth is less than 190mm then the spacer
(optional) must be used to give a minimum clearance from the rear of the fire to
the rear of the chairbrick of at least 90mm to allow sufficient space for the collec-
tion of debris which may fall down the chimney. The fireplace must be checked to
ensure that no part of the chairbrick is within 50mm of the flue outlet of the fire
when installed.
1.8 FITTING TO PRE-CAST FLUE INSTALLATIONS
To install the fire box in to pre-cast flue starter blocks, there must be at least
120mm from the mounting face of the fire to the rear of the pre-cast flue
starter block to allow sufficient space for debris collection. To increase this depth
the fire surround may be packed away from the wall using suitable
non-combustible board, providing the installation is correctly sealed. If in doubt
about the suitability of the fire contact Formosa Fires for advice before
proceeding.
It is important to ensure that the pre-cast flue is in good condition and is free from
extruded mortar or sealant from between the flue blocks.
This appliance has been tested for use in a pre-cast flue block complying
with BS EN 1858. In accordance with BS EN 1858, pre-cast flues built with
directly plastered faces (front or rear) are not correctly installed as to ensure
proper operation with any type of gas fire. In some instances of this flue
construction, temperature cracking of surface plaster may occur through no
fault of the appliance. An air gap or some form of insulation material should
be installed to prevent normal flue temperatures from damaging wall
surfaces.
1.9 FITTING TO PRE-FABRICATED TWIN WALL METAL FLUE BOXES
The appliance may be fitted to twin wall metal flue boxes conforming to the con-
structional requirements of BS 715, (for example the Selkirk LFE 125 box). The
box must have a minimum flue diameter of 125mm internal and minimum internal
dimensions of 160mm deep by 580mm high by 350mm wide. There are no maxi-
mum dimensional requirements for the box. The top face of the box must be
insulated with a minimum thickness of 50mm of non-combustible mineral wool
insulation or similar material. The flue box must stand on a non-combustible base
of minimum thickness 12mm.

9
1.10 HEARTHS
This appliance must only be installed on to a concrete or non-combustible hearth.
The hearth material must be a minimum thickness of 13mm with the top surface at
least 50mm above the floor. The hearth must be fitted symmetrically about the fire
opening and have a minimum width of 760mm and a minimum projection of
300mm forwards from the fire opening.
1.11 SPILLAGE MONITORING SYSTEM
This appliance is fitted with an atmosphere sensing spillage monitoring system in
the form of an oxygen sensing pilot. This is designed to shut the fire off in the
event of a partial or complete blockage of the flue causing a build up of
combustion products in the room in which the fire is operated. The following are
important warnings relating to this spillage monitoring system :-
1) The spillage monitoring system must not be adjusted by the installer.
2) The spillage monitoring system must not be put out of operation.
3) When the spillage monitoring system is exchanged only a complete original
manufacturers part may be fitted. It is not possible to replace individual parts on
the pilot system on this appliance, only a complete pilot assembly (including the
thermocouple) may be fitted.

10
10
SECTION 2
INSTALLATION OF FIRE
2.1 UNPACKING THE FIRE
Carefully lift the fire out of the carton. Remove the loose item packaging carefully
from the front of the appliance. Check the contents as listed :-
PackingCheckList
1 off Fire box / burner assembly
1 off Boxed ceramic base, 2 piece ceramic front rail 11 synthetic coals or
pebbles (optional pebble pack)
1 off Loose items bag.
1 off User instruction book and Installation book
2.2 INSTALLING THE FIRE BOX
Establish which type of flue you are intending to install the fire in to :-
225 x 225mm (9 inch x 9 inch) brick built chimneys
175mm (7 inch) diameter lined brick or stone flue, or insulated pre-fabricated
metal flue box to B.S. 715.
When installing into 125mm (5 inch) diameter lined brick or stone flue, or
insulated pre-fabricated metal flue box to B.S. 715 and pre-cast flues the
restrictor baffle must not be fitted.
Aspillagetestmustalwaysbecarriedouttochecksatisfactory
clearanceofflueproducts,regardlessofthetypeoffluethe appliance
isbeingfittedto.

11
11
For manual control models proceed as follows :-
a) Remove the burner heat shield from the front of the fire box to allow
access to the burner. See figure 3 below.
Fig. 3
b) Ensure that the hearth is protected from damage and carefully lift the
fire box into the fire opening, then slide it back into position. Check that
the fire box flange fits flush to the sealing face of the fire surround or
wall with no gaps present.
c) Remove the four retaining screws securing the burner to the firebox.
The base of the burner unit can now be pulled forward, allowing the
burner to be removed outwards and downwards from the fire box. See
figure 4 below.
Fig. 4

12
12
For Slide Control Models Proceed as follows:
d) Remove the burner heat shield from the front of the fire box to allow
access to the burner. See figure 5 below.
Fig. 5
e) Ensure that the hearth is protected from damage and carefully lift the
fire box into the fire opening, then slide it back into position. Check that
the fire box flange fits flush to the sealing face of the fire surround or
wall with no gaps present.
f) Remove the burner. To allow burner removal, the control lever operat
ing cable must be removed. The control lever operating cable can be
seen running across the base of the fire, below the burner. To release
the cable, unscrew the cable securing screw located in the centre of the
aluminium operating arm and pull the cable out from its fixing hole.
Release the other end of the cable by pushing the cable forwards to the
right, i.e. into the operating arm so as to release the tension. Pull the
cable nipple out of the retaining hole and remove the cable through the
slot in the operating arm. See figure 6 overpage

13
13
Fig. 6
g) Unscrew the burner assembly fixing screws at either side of the firebox,
and the two fixing screws at the base of the fire (See figure 7
below).Carefully pull the base of the burner forwards and downwards
from the fuel-bed support panel. The burner can now be removed from
the appliance.
Fig. 7

14
14
Continue for all models
Whilst the fire box is still in position, decide which side the gas supply is to enter
the fire from. If concealed pipe work is required plan the pipe run to enter the fire
box through one of the openings in the sides of the fire box below the fuelbed
support panel and connect to the isolating / inlet elbow. The gas connection to the
appliance should be made to the isolating / inlet elbow using 8mm rigid tubing.
There must be no soldered joints within the firebox. See figure 8a & 8b below for
suggested concealed pipe layouts.
Fig. 8a
Gas Supply
Firebox
Fig. 8b
Approx.
40mm Fireplace
Gas Supply
Builders
Opening
Firebox
Approx.
40mm
Fireplace
Note : Before breaking into the gas supply a pressure drop test should be
carried out to establish that the existing pipework is sound.
Carefully withdraw the fire box from the opening to enable the gas supply and fire
fixing to be completed.

15
15
IMPORTANT : Sealing of the Gas Unused Gas Pipe Inlet Apertures
In line with current regulations, it is imperative that the gas supply inlet aper-
tures that are not utilised during the installation are sealed with the foil tape
as supplied. Failure to seal these inlet apertures could lead to flame
reversal, which in turn will damage the burner and control systems of the product.
figure 9 below shows a correctly sealed installation.
Fig. 9
Only holes to be left are the specifically
sized air relief holes as indicated by the
labels positioned by them and the gas
inlet aperture that is used
Seal off unused gas inlet
apertures and cable fixing holes
as shown
PLEASE NOTE :-
Formosa Fires WILLNOTBELIABLEFOR
GUARANTEECLAIMSTHATAREASADIRECT
RESULTOFTHEUNUSEDGASINLETAPERTURES
NOTBEINGCORRECTLYSEALED.

16
16
The preferred method of fixing which is suitable for almost all situations is
the cable fixing method which is described in the following section in detail.
To fit using the preferred cable method proceed as follows-
h) Mark out and drill 4 off No 14 (6mm) holes in the back face of the fire
opening in the positions shown below in figure 10
Fig. 10
250mm
500mm Fireplace Opening
100mm
20mm
Fit the wallplugs provided and screw the fixing eyes securely into the rear of the
fire opening. If the clearance at the rear of the fire is at the minimum specified for
a precast flue application, it may be necessary to bend over the lower fixing eyes
after screwing them fully in to the rear of a pre-cast starter block.
i) Uncoil the two fire fixing cables and thread one end of each of the
cables through one of the two holes on each side of the flue outlet
shroud.
j) Position the fire carefully on the (protected) surface of the hearth and
reach into the fire opening. Thread each of the cables vertically
downwards through the pair of fixing eyes on the same side of the fire.
Thread the free end of the cables through the corresponding circular
hole on each side of the lower rear of the fire. Carefully slide the fire
box back into the fire opening and pull both cables tight.

17
17
k) Thread a tensioning screw over each of the cables and ensure that the
tensioning nut is screwed fully up against the hexagon shoulder of the
tensioning screw (this provides maximum travel for the tensioning nut).
l) Fit a screwed nipple on to each of the cables and pull hand tight up
against the tensioning screw, then secure each nipple with a flat
bladed screwdriver. See figure 11 below
Fig. 11
m) Evenly tighten the tensioning nuts to tension both cables and pull the
fire snugly against the wall. Do not overtighten, it is only necessary to
pull the seal up against the sealing face of the wall, it does not need to
be compressed. Check that there are no gaps behind the seal.
n) With the fire securely in place, if a concealed gas connection has been
made through either of the access holes in the sides of the fire, the
holes should be closed around the pipe to prevent leakage of air
through the gap around the pipe.
o) Refit the burner. Fit the four retaining screws and check that the burner
is correctly locked into position. On slide control models refit the control
cable To do this, firstly locate the nipple on one end of the cable into
recess in operating arm and then secure the front part of the operating
arm back onto the rear of the operating arm with the retained screw.

18
18
This should not be overtightened. Move the control lever fully
downwards and check that the left hand micro-switch operates the
igniter and that the control valve spindle is fully depressed. Move the
control lever upwards to the “off” position and check that the right hand
(cut-off) micro-switch operates. Check that the control lever operates
smoothly and safely.
NOTE : The cable is factory set, and therefore should need no adjustment
p) Refit the front burner heat shield to the sides of the fire box (2 Screws)
and secure the trim to the fire using the magnets provided.
q) Before making the final gas connection, thoroughly purge the gas
supply pipework to remove all foreign matter, otherwise serious
damage may be caused to the gas control valve on the fire.
The other firebox fixing method is as follows :-
In installations where the cable method is not suitable (e.g. loose masonary in rear
of fire opening) the firebox can be secured to the fire surround using four screws
and wall plugs provided. Below (figure 12) is a diagram to indicate the hole centre
positions available on the firebox to facilitate the screw fixing to the fireplace /
surround.
Fig. 12
300mm
Firebox
Mounting
Flange
430mm
133mm
420mm

19
19
2.3 GAS TIGHTNESS AND INLET PRESSURE (MANUAL CONTROL
MODELS)
a) Remove the pressure test point screw from the inlet elbow and fit a
manometer.
b) Turn on the main gas supply and carry out a gas tightness test.
c) Depress the control knob and turn anti-clockwise to the position marked
pilot. Hold in the control knob for a few seconds to purge the pipe work
then press the igniter button. The burner should light, continue to hold
the control knob for a few seconds then turn to the full-on position.
d) Check that the gas pressure is 20.0 mbar (+/- 1.0mbar) 8.0 in w.g.(+/-
0.4 in w.g.)
e) Turn off the fire, remove the manometer and refit the pressure test point
screw. Check the pressure test point screw for gas tightness with the
appliance turned on using a suitable leak detection fluid or detector.
2.4 GAS TIGHTNESS AND INLET PRESSURE (SLIDE CONTROL
MODELS).
a) Remove the pressure test point screw from the pressure test point and
fit a manometer.
b) Turn on the main gas supply and carry out a gas tightness test.
c) Depress the control lever to the position marked pilot. Hold down the
control lever for a few seconds to purge the pipe work. The burner
should light, continue to hold the control lever for a few seconds then lift
to the full-on position.
d) Check that the gas pressure is 20.0 mbar (+/- 1.0mbar) 8.0 in w.g.(+/-
0.4 in w.g.)
e) Turn off the fire, remove the manometer and refit the pressure test point
screw. Check the pressure test point screw for gas tightness with the
appliance turned on using a suitable leak detection fluid or detector.

20
20
SECTION 3
ASSEMBLING FUEL BED AND COMMISSIONING
3.1 ASSEMBLING THE CERAMICS AND FUEL BED
NOTE : The position of the fuel-bed components are critical to the
performance of the product. Therefore please ensure that the fuel-bed
components are positioned as described in the following section prior to
requesting a service call due to soot build up, poor flame pattern etc.
a) Place the fuel-bed base centrally on to the fuelbed support and pull
fully forwards to the burner. Make sure that the fuelbed base is
located centrally in the fire box. Ensure that the fuelbed base is
not lodged on the burner. See figure 13 below.
Fig. 13
b) Place the left hand front coal rail moulding onto the front ceramic rail
support as shown below in figure 14
Fig. 14