Bellfires UNICA-2 70 Guide

INSTALLATION INSTRUCTIONS &
MANUAL FOR MAINTENANCE
UNICA-2 70
Gas fire with open combustion system
Bellfires wishes you many cosy evenings with your new Bellfires gas fire
This document is an essential part of your gas fire. Read it carefully
before installation and maintenance of the gas fire and keep it in a safe place!
Serial number:
Production date:

3
Bellfires English
Installation instructions
BELLFIRES GAS FIRE WITH OPEN COMBUSTION SYSTEM:
Unica-2 70 (UNC-2 70)

4
Bellfires English
Installation instructions

5
Bellfires English
Installation instructions
The installation must only be carried out by a
“Gas Safe Register” registered installation engineer.
IMPORTANT
CONTENTS
Page
1. INTRODUCTION ............................................................................. .. ... .. ... 7
2. INSTALLATION .
................. ............................................. ... ..... .... ....... . .... . . 15
3. ANNUAL MAINTENANCE ......................................................................... 38
4. FAULTS ........................................................................
...... ................... .... . 42
5. DISMANTLING / ASSEMBLING OF THE GLASS,
THE REGULATOR AND BURNER . ....................................... ................ .... 43
6. CONNECTING DIAGRAM ......................................
......................... ..... . ... 44
7. DIMENSIONS .............................................................
................... ....... .... . 45
8. TECHNICAL DETAILS/REGULATIONS .
....... ................... ............. . .......... . 49
9. REPLACEMENT PARTS LIST .
.... ................. ............... ....... . ................ .... . 51
10. DISPOSAL OF PACKAGING AND APPLIANCE .
.......... ............... . .... ...... . . 53

6
Bellfires English
Installation instructions

7
Bellfires English
Installation instructions
1 INTRODUCTION
1.1 GENERAL
The gas fire must be positioned and connected as an “open” appliance by a “Gas Safe
Register” registered gas installation engineer in accordance with the following installation
instructions, nationally and locally applicable regulations (see “Technical Details /
Regulations” at the rear of this manual). If you have any queries regarding the
installation, please consult your local gas company.
This manual contains directions for both positioning and for connecting the appliance .
It also contains indications for the annual maintenance, technical data for the appliance,
parts information and directions in the event of problems.
Study the Installation instructions carefully before using the appliance. We recommend
you keep this manual in a safe place for reference purposes.
Read the “Instructions for use & maintenance manual” before operating the appliance
Important: Before beginning the installation, check that the details on the
rating plate correspond to the gas type and pressure to which
the appliance will be connected.
If an existing chimney is to be used, please consult your installer first. If the chimney
was previously used for a wood or coal fire, then it should be cleaned by an expert. A
chimney draw of approximately 5 Pa (=0,05 mbar) is sufficient for full load of the
appliance. If the chimney draw is more than 20 Pa (=0,2 mbar), then it is recommended
to reduce it.
The appliance is factory set to the correct nominal heat input. The pilot light is set to the
correct level of consumption.
The gas fire can be installed as an insert into an existing open fire place or as a
built-in appliance in a new fire place.
1.2 SAFETY
• Do not place embers, wood logs or shingles against the pilot light burner. Make sure
that the pilot flame can burn at all times freely over the main burner. Only in this way
is proper ignition of the main burner ensured.
Ignoring these directions could lead to a dangerous situation.
• Do not place flammable objects within 100 cm of the appliance. Pay special attention
to furnishings and ornaments around the fire.
• When igniting the pilot light and burner, always keep a minimum distance of 100 cm
from the front of the appliance.

8
Bellfires English
Installation instructions
•If the pilot flame goes out for any reason, wait for 5 minutes before attempting to
re-light it.
• It is essential that the appliance, the complete flue system and the room ventilation
openings are cleaned and inspected annually by a recognised fitter/gas specialist.
The safe operation of the appliance will thus remain guaranteed.
See Chapter 3: Annual maintenance.
• The gas fire must never be used with the door open or the door glass removed.
• Never place flammable material on the ceramic log set.
• The filling of the main burner with embers, wood logs or pebbles may not under any
circumstances be changed or added to.
• Do not place easily-flammable materials, such as nylon clothing or flammable liquids,
in the vicinity of the gas fire.
• Ensure at all times that children and other people who are not aware of the operation
of the gas appliance are only in the vicinity of the appliance exclusively under
supervision.
• Use a fireguard to protect the people and children mentioned above against possible
burns.
1.3 BUILT-IN PROTECTION OF THE APPLIANCE
The appliance is fully protected by means of a thermo-electric pilot light shut off in the
event of a gas escape from the main burner.
Flue gas exhaust protection:
Also the appliance is fitted with an atmosphere protection facility. This is an “oxy-stop”
pilot flame that turns off the burner if the flue gas is insufficiently exhausted
When the flame is blue and hazy (when the appliance is burning for some time), this
means that combustion is not correct, and that the “oxy-stop” will be activated within a
certain period.
If the “oxy-stop” pilot flame is activated then check that the air supply and the flue ex-
haust are open. Following isolation of the cause, the appliance can be put back into
operation.
Always contact your installer in the event of continual problems.
It is not permitted to disable or modify the protection.

9
Bellfires English
Installation instructions
N.B. If any part is missing, please contact your dealer.
1.4 INCLUDED
In the event that the “oxy-stop” pilot flame is to be replaced, then only the original model
should be applied.
This atmosphere protection; the “oxy-stop” pilot light, is not a substitute for an
independent-mounted carbon monoxide detector.
Set documentation - Instructions for use
- Installation instructions
Attributes - Ceramic log set, or
marble shingles white or marble shingles grey

10
Bellfires English
Installation instructions
1.5 OPTIONS AND ACCESSORIES
The following options and accessories can be supplied by your dealer:
Part no Option
311960 Mantle iron L = 1000 mm
Part no Accessorie
302092 AC Power adaptor 230 VAC - Power supply “receiver”
333739 Black mirror, rear wall Unica-2 70
334587 Fan set Unica-2 series UK:
Set, consisting a convection fan
(230 VAC/39 W), cable and assembly material.
3........ Ambient lighting set Unica-2 series:
Set, consisting of two lamps (230 VAC/2x 25 W),
cables and assembly material.
333605 Module:
230 VAC Power supply, required for the options Fan set,
and/or Ambient lighting set. Including connecting cable.
334275 Conversion kit: “Lined” “Unlined” flue connection.
334276 Conversion kit: “Unlined” “Lined” flue connection.
301206 Ø5” Flue adapter for conversion: Ø4” Ø5”.

11
Bellfires English
Installation instructions
1.6 PREPARATIONS BEFORE INSTALLATION
Before installing the appliance, first observe the following instructions.
1.6.1 The most important facilities according to the regulations
1 NATURALLY VENTILATED HOUSE (see Figure 1)
• Check that the room in which the appliance is to be fitted has non-closable
ventilation openings, according the national and local applicable building
regulations. The minimum dimensions are detailed in “Technical Details /
Regulations” at the rear of this manual.
• The flue gas exhaust must exit at “outlet area I”.
• UK only: The appliance has a nominal input not exceeding 7.0 kW and
doesn’t normally require any additional permanent ventilation.
Figure 1: Naturally ventilated house
Outlet area I
GAS
Ventilation
opening

12
Bellfires English
Installation instructions
2 MECHANICALLY VENTILATED HOUSE (see Figure 2)
• Check that the room in which the appliance is to be fitted has non-closable
ventilation openings according the national and local applicable building
regulations. The minimum dimensions are detailed in “Technical Details /
Regulations” at the rear of this manual.
• The flue gases must be extracted by means of a flue extraction fan.
• UK only: The appliance has a nominal input not exceeding 7.0 kW and
doesn’t normally require any additional permanent ventilation.
Figure 2: Mechanically ventilated house
Flue extraction fan
GAS
Ventilation-
opening

13
Bellfires English
Installation instructions
Use of the rear flue exit, for an “unlined” installation,
is only allowed in the U.K.
1.7 GENERAL SERVICES
1 FLUE
There are 3 possible conventional flue connections:
Appliance installed into a new chimney (e.g. stud work)
Top exit only: Ø4” (Ø100 mm for rigid pipe sleeved, or twin wall or Ø106 mm
for flexible pipe sleeved, or twin wall) for a “Lined” installation.
Ø5” with adapter (option) for rigid or flexible pipe.
Appliance installed into an existing chimney
Top exit For a “Lined” installation
Ø4” (Ø106 mm) or Ø5” (Ø127 mm) with adapter.
Rear exit For an “Unlined” installation Use a flue Ø7” (Ø178 mm)
minimum. Rear exit flue opening appliance is
252 x 34.5 mm
(U.K. only).
Before installation, it must be verified that the flue has sufficient draw. Remove all
flue gas dampers (if present) in the flue or fix them in the open position. The flue
must be at least 2 metres long. In order to prevent condensation in a masonry flue
and, if necessary, to improve correct operation of the appliance, it is recommended
that the flue be fitted with an, (insulated) aluminium or (flexible) stainless steel pipe
of Ø100 mm (4” or 5” minimum) (Top exit) or Ø178 mm (7” minimum) (Rear exit).
An protective cap must be placed on top of the chimney to prevent rain entering.
Where it concerns a new aluminium or (flexible) stainless steel pipe, you need to
encase the entire flue pipe with fireproof material. This in connection with the high
external temperatures of the flue pipe (up to + 300°C.). You must also never apply
and/or position flammable materials in the vicinity of the encased pipe.
2 VENTILATION OF THE ROOM
The ventilation of the room has to comply with national and local building regulations.
The minimum dimensions of the ventilation opening(s) are detailed in “Technical
Details/Regulations” at the rear of this manual. The ventilation opening(s) must be
non-closable !!!
3 GAS CONNECTION
The Ø8 mm gas connection is located, factory fit, on the rear side of the appliance.
During installation the gas connection can also be made underneath or on either
side. Connect the gas supply to the appliance using a compression coupling. Use
only gas piping with a minimum diameter of 1/2” G with a shut-off valve.
A small gas tap is located, in the appliance, right-under the main burner.
Position the gas supply pipe such that it can be easily mounted after installation.
A
B

14
Bellfires English
Installation instructions
4 ELECTRICAL CONNECTION
If the appliance is equipped with a convection fan and/or ambient lighting or
AC Power adaptor, there must be a wall socket with earth connection, preferably at
the right-hand side of the appliance. The socket should be accessible at all times.
The powercable (+ 0.5 m) is coming from the rear of the appliance, near the gas
inlet pipe.

15
Bellfires English
Installation instructions
2 INSTALLATION
2.1 POSITIONING THE APPLIANCE
Important: • Never use combustible materials during the installation. The
appliance may not be installed against a flammable rear wall.
• During installation of the gas fire, a clearance of 3 mm should
be maintained on all sides of the appliance to allow for
expansion of the appliance during operation.
• Do not insulate the appliance! Only the top and sides
may be fitted with a strip of white, loose insulation wool
(heat-resistant to 1000°C), width 15 cm max. to protect
the wall.
Do not use fibreglass or Rockwool, or any other sort of
insulating material. These emit a pungent odour.
This is considered extremely unpleasant. They may
also cause discolouring of the chimney.
• Flammable materials, such as curtains, should not be
placed in the vicinity of the gas fire.
Minimum safe distance: 100 cm.
• Position the appliance at least 12 cm above the floor height.
Not required with a non combustible floor.
• Ensure that the temperature of the floor under and in front
of the appliance can never rise above 85°C!
Make use of a temperature protection plate (of nonflammable
material) on the floor if necessary.
Take care with a floor made of a flammable material.
• Minimum distance between the appliance and a front wooden
fireplace; with a depth of less than 10 cm, is:
* 5 cm on the sides: (min. distance: side appliance - leg
wooden fireplace surround)
* 40 cm at the top: (m in. distance: top appliance - bottom
of beam wooden fireplace surround)
The temperature on the underside of the beam of the wooden
fireplace must never exceed 85°C. Optional: insulate the
bottom of the wooden beam with a fireproof plate.
Read one of the following instructions for fitting the appliance, as applicable:
Paragraph 2.1.1 Fitting into a new chimney
Paragraph 2.1.2 Fitting into an existing opening larger than the appliance
Paragraph 2.1.3 Fitting into an existing opening equal or smaller than the appliance

16
Bellfires English
Installation instructions
2.1.1 Fitting into a new chimney
The fireplace must be mounted on a concrete floor. If there is no concrete floor, it is
essential to re-enforce the floorboards underneath with concrete. Build in the fire insert
up to the top of the fireplace opening. Push the appliance into the opening and make
the chimney connection using an (insulated) aluminium or (flexible) stainless steel pipe
of Ø100 mm (Ø4”) (or Ø127 mm (Ø5”) with an adapter) for a “Lined” installation.
An “Unlined” installation is not allowed in a new chimney.
Connect the gas supply using the separately provided gas inlet connector. Ensure that
the gas regulating block is straight during the connection. Ensure that the gas regulating
block and pipework are not put under stress.
Make the electrical connection. (Only applicable if the appliance is provided with an
convection fan, and/or ambient lighting or a AC Power adaptor)
During subsequent installation, protect the gas piping against encasement by cement
etc.
Important: Cement and chalk can damage the gas piping
and can, in turn, lead to gas leaks.
The appliance can now be built in.
First determine the places for the ventilation ducts (grates, at the top and bottom of the
fireplace).
The appliance can be built in using brickwork or by means of fire-resistant plates that
are screwed to a metal frame. You can, if you like, erect a natural stone mantelpiece in
front of this.
If desired, the frame can be removed temporarily, during the installation of the appliance.
First remove the door (including glass); see paragraph 2.1.2 point 1.
After that loosen the nuts on the corners, on the inside, a few turns. Take the frame
forwards and remove. When the installation is completely finished one can place back
the frame. Make sure the nuts are fixed well.

17
Bellfires English
Installation instructions
The brickwork must be built up around the hearth. In connection with the hearth
expanding during burning: there must be at least 3 mm clearance on either side of the
appliance. Do not build up the brickwork farther than the top of the appliance (keep in
mind the thickness of any plastering!).
The appliance is supplied with a straight pressed steel lintel as option to allow installation
against a flat wall or in a fireplace. The mantle iron is intended for supporting the brick-
work above the appliance. The mantle iron must rest on the brickwork on both sides so
that upward building is possible. The brickwork therefore must not rest on the fireplace;
there must be approx. 3 mm clearance in connection with the weight.
A heat-resistant sealing cord should be placed between the appliance and the lower
side of the lintel to allow vertical expansion of the appliance and to prevent cracking the
fireplace.

18
Bellfires English
Installation instructions
Do not use masking tape on the appliance
when installing and plastering.
Tape can damage the finish of the hearth.
The brickwork or the fire-resistant sheet construction can now be continued to ceiling
height.
If using other materials, such as stone or heat-resistant plating, you should follow the
supplier’s instructions.
For further positioning instructions: See Paragraph 2.1.3.
Check that all connections are completely gas tight using soapy water or a leak tester.
As a check, allow the fire to burn briefly (maximum 1 minute).
Following verification that there are no leaks, finish off building in the appliance.
After installation in a new fireplace and/or applying new cement work, the
appliance cannot be used for at least four weeks.

19
Bellfires English
Installation instructions
2.1.2 Fitting into an existing opening larger than the appliance
“Lined” installation:
Place an (insulated) aluminium or (flexible) stainless steel pipe of Ø100 mm (Ø4”) (or
Ø127 mm (Ø5”) with an adapter) into the flue for the connection between the flue
spigot of the appliance and the chimney and then position the appliance into the fire-
place. Push the aluminium or stainless steel pipe into the flue spigot of the appliance.
For further installation procedures, refer to paragraph 2.1.1 and 2.1.3.
“Unlined” installation (U.K. only):
Transformation from a “Lined” flue (top exit) connection to an “Unlined” flue (rear exit):
Use for this: Conversion kit “Lined” “Unlined” flue connection.
1 Removal of the door and glass:
Remove the door (including glass) by left and right screw loosening a few turns.
Carefully lift the door slightly, tilt forward and remove. Wear gloves!

20
Bellfires English
Installation instructions
2 Removal of the top exit flue connection piece:
Disassemble the top flue outlet connection piece from the inside of the appliance.
a. Disassemble first the baffle plate at the top of the combustion chamber, by a
front screw loosening, and take the plate out.