Jetmaster SLOW COMBUSTION User manual

Slow Combustion Fireplace
Installation & Operation Instructions
November 2006

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
SLOW COMBUSTION FIREPLACE INSTALLATION AND
OPERATION INSTRUCTIONS
Congratulations on the purchase of your new Jetmaster Fireplace.
Please read carefully the installation and usage information in this booklet, if followed correctly this
efficient unit will last you for a long time and will generate warmth and ambience wherever it is
installed.
Note: Save these instructions in a secure place
Index
Page
Technical data 2
General safety 4
Installation 5
Placing the unit in the room 5
Roof, ceiling & flue requirements 7
Build in units 12
Operating the unit 16
Care & maintenance 19

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
TECHNICAL DATA
Heat output: 5.5kw (min) - 8kw (max)
Recommended maximum room size: 275m3
Flue size: Ø150mm
625
815
640
585
410
58
41
58
2

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
GENERAL SAFETY
DO NOT SE FLAMMABLE LIQ IDS OR AEROSOLS TO START OR REKINDLE THE FIRE.
DO NOT SE FLAMMABLE LIQ IDS OR AEROSOLS OR PLACE THESE IN THE VICINITY
OF THIS APPLIANCE WHEN IT IS OPERATING.
DO NOT STORE F EL WITHIN THE HEATER‘S INSTALLATION CLEARANCES.
DO NOT SE THE NIT AS AN OPEN FIRE ALWAYS SE IT WITH THE DOOR CLOSED.
THIS APPLIANCE SHO LD NOT BE OPERATED WITH A CRACKED WINDOW.
THIS APPLIANCE SHO LD BE MAINTAINED AND OPERATED AT ALL TIMES IN
ACCORDANCE WITH THE INSTR CTION PROVIDED IN THIS BOOKLET.
THE SE OF SOME TYPES OF PRESERVATIVE-TREATED WOODS CAN CA SE
HAZARDO S B RNING CONDITIONS
THIS APPLIANCE IS A HEATING APPLIANCE AND HOT S RFACES CAN BE EXPECTED.
IT IS RECOMMENDED THAT A SECONDARY BARRIER OR SHIELD BE SED TO
PREVENT SMALL CHLIDREN FROM MAKING ACCIDENTAL CONTACT WITH THE NIT.
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
INSTALLATION
PLACING THE UNIT IN THE ROOM
Safety distan es
Heat is radiated from the front of the fireplace. It is therefore important to take special care that no
combustible material is placed close to the opening of the fireplace. No combustible materials e.g.
wooden furniture, cupboards and fittings should be placed within 700 mm from the front of the
fireplace.
To maintain a safe distance from the sides and the back of the unit that also radiates heat, the safety
distances indicated below must be adhered to.
NOTE: The safety distances quoted, assumes that all walls are constructed from heat resistant
materials. If any combustible materials are used (e.g. wooden panels additional measures should
be taken to protect these materials from the heat radiated by this fireplace.
These safety distances applied to both free standing as well as build in units. For example, do not
allow any curtains within 500mm from either side of the unit.
Ventilation
To maintain a fire, fresh air (oxygen) is required. All burned air will exit the room through the flue
pipe. It is important to allow adequate fresh air to enter the room, in order to replenish the air supply.
An inadequate air supply (air starvation) could cause smoke to escape into the room.
Air starvation can also be caused by mechanical appliances such as kitchen extraction systems and
some types of air conditioners.
Height of the build in unit
There is no functional limitation for the height at which this unit should be build into a wall. Apart
from aesthetic reasons for determining the height, consideration should be given to the fact that this
unit incorporates a secondary convection system.
Fresh cool air is drawn in from the bottom, and released as hot fresh air from the top of the unit. The
lower the unit is installed, the more effective this process.
700
100
500
500
4

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
NOTE: A pace of at lea t 30mm mu t alway be left underneath the unit.
EXAMPLE: If the unit is build in at a height of 2 bricks from the floor level, a gap of approximately
130mm will be left underneath the unit.
NOTE: If the unit is build in at only 1 brick level above floor, special care should be taken to ensure
that the floor secreting, tiling and hearth, dos not reduce the air gap underneath the fame to less than
30mm.
Hearth
Heat is radiated from the bottom of this fireplace. It is therefore important to ensure that the fireplace
is installed on a non-combustible surface.
A popular example of such a surface is a floor, tiled with ceramic tiles.
Do not install this unit directly onto wooden or carpet floors. For these areas a non-combustible
hearth must be placed underneath the unit.
A popular example of such a hearth is a marble, or granite slab
The size of the heart must cover at least the area underneath the unit with a border of 100mm all
round and 200mm in front of the unit as shown in the pictures below.
Roof / eiling influen e
It is important to take into account all requirements for the flue height, flue protection and the flue
termination, before making a final decision on the location of the fireplace in the room.
NOTE: First read the rest of this manual before starting the installation
100
100
200
100
200
5

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
ROOF, CEILING & FLUE REQUIREMENTS
Flue length
It is important to note that the correct installation, of the flue will ensure that the unit functions
properly. Deviation from these requirements would lead to un-satisfactory performance.
The length of the flue must be at least 3.6m.
A flue pipe longer than 4.8m could lead to excessive draw from the flue system. It might be
necessary to install a secondary damper in the flue pipe to reduce the suction. Excessive suction
could lead to overheating of the unit and the flue pipe. Consult your nearest Jetmaster agent for
assistance, when longer flue sections are planned.
Flue termination point
It is important to terminate the top of the flue in such a way that it will allow free passage of
combustion products to the atmosphere without being subjected to turbulent air or high pressure
zones that could cause a downdraught.
The guidelines stipulated below are the minimum requirements allowed. Surrounding landscapes,
buildings and inclement weather conditions, not addressed below, could also influence the escape of
combustion products. Contact your local Jetmaster agent for assistance in this regard
Roof pitch more than 10°
2000 min
Less than
600mm
600
More than
600mm
1000
A
B
C
1000
D
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Roof pitch less than 10°
IF Then
If the flue is closer than 600mm
to the apex of the roof
The flue termination must be at
least 600mm above the roof
apex.
IF THE FLUE IS FURTHER
THAN 600MM FROM THE
APEX OF THE ROOF
The flue termination must be at
least 1000mm above the roof
level.
IF ANY BUILDING IS
CLOSER THAN 2M FROM
THE FLUE
The flue termination must be
raised until it is clear within 2m.
THE ROOF PITCH IS LESS
THAN 10°
The flue termination must be at
least 1000mm above the highest
point of the roof.
Choi e of owls
Any Jetmaster, Ø150mm. cowl can be used.
The following table illustrates the recommended cowls for specific weather conditions.
* Chinese Cowl
* Fixed Cowl
Low wind conditions
Rotating Cowl & Ø150mm base Medium to High wind
conditions
* Turbo Cowl
Medium to High wind,
With rapid changes in
wind directions
*NOTE: The Chinese, Fixed and Turbo cowls M ST NOT be used on Thatch or Timber roofs.
D D
AA
BB
CC
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Ceiling penetration
The ceiling boards must be protected from the heat that will be generated by the flue pipe. It is
therefore important to comply with the following.
The flue diameter is Ø150mm. An Ø175mm hole must be cut in the ceiling, thus leaving a 12-13mm
gap all round the flue pipe.
The gap is finished neatly by fixing the escutcheon plate to the ceiling, covering the hole.
NOTE: Do not eal the mall air gap between the flue pipe and the e cutcheon plate.
A gap of 150mm must be left between brandering beams and the flue pipe. Should the gap be less
than 150mm, then added insulation between the flue pipe and the brandering should be provided.
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Roof Cavity
It is important that all combustible materials in the ceiling cavity be protected from the heat radiated
by the flue pipe.
It is recommended that the complete flue run in the ceiling cavity be insulated, using ceramic wool.
A gap of at least 150mm must be left between the flue pipe and any wooden beams. Should the gap
be less than 150mm, and then added insulation must be provided to prevent the wooden beams from
overheating.
It is recommended that all joints in the flue pipe, should be secured using self-drilling screws, and
sealed using heat resistant silicone. It is normally not necessary to secure a single joint that is visible
from the inside of the room. Care must be taken to ensure that the structural integrity of the flue
installation is not compromised.
(See picture on next page)
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
That h or timber roofs
Where the Slow Combustion Fireplace is installed in a thatch or timber-roofed home, the space
between the steel flue and the thatch should be very well packed with heat insulation material. (e.g.
ceramic fibre)
The steel flue must be thoroughly insulated from the thatch. This can be done effectively by fitting a
sleeve through the thatch, around the steel flue.
NOTE: For the e roof , only a Jetma ter rotating cowl mu t be fitted to the flue. See the ection
on flue termination.
Finishing
Before commissioning the unit, perform a complete inspection, ensuring that all parts are in a
working condition.
Inspect all surfaces exposed indoors for dirt or any area where paint might have been scratched off.
Paint can be touched in using Jetmaster, heat resistant paint.
NOTE: If any corro ion i detected, thi hould fir t be removed completely before touching
the paint in.
All flue sections and components must be pained with a quality, heat resistant enamel paint.
Before applying the enamel paint, ensure that the complete area is properly cleaned, and covered
with the Jetmaster heat resistant paint. This must form a proper primer for the enamel paint.
Flue Pipe
Ceiling Board
Brandering
Beam
Insulation
Binding ire
10

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
BUILD IN UNITS
Building in this version of the slow combustion fireplace, requires 3 basic steps:
•Building in the outer casing
•Fitting the unit into the outer casing
•Finishing by fitting the outer frames.
The basic components are depicted below:
NOTE: In tallation of a fireplace mu t be done according to the law and regulation of each
country.
Building In the asing
The casing of the unit can be build in during the bricking stage of the wall, allowing toe functional
part of the unit to be stored out of harms way.
Standard building techniques can be used to brick the unit in place. Special care must however be
given to the following:
•Ensure that the casing rests on at least a full brick / lintel run in front, and at the back of the
casing. The casing is not designed to carry the weight of the unit by itself; it relies in the
structural integrity of the brickwork underneath it.
•A flange is provided at the font of the casing. Ensure that no brickwork, or plaster work
protrudes in front of this flange. Failing to do so will prevent the frame from fitting properly
at the final stage of the installation.
•The complete casing must be wrapped with ceramic wool. This is to protect brickwork from
excessive heat.
Outer Casing
Unit
Main Frame
Bottom
Frame
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
•Allow a gap of 10mm to 25mm between brickwork, and all sides of the casing (except for the
bottom). This gap is vital to allow for expanding steel parts while the unit is being used. This
gap is typically filled with the ceramic wool that is prescribed to be used.
NOTE: Alternative building material and in ulation material i allowed to be u ed at
the di cretion of the builder / architect, provided that all building material i effectively
protected from the effect of the heat that will be generated. The teel ca ing will reach
temperature exceeding 150°C
•ALWAYS use a lintel, above the casing. NEVER allow the casing to carry any weight of the
brickwork.
•On the top of the casing, allowance is made for a Ø150mm flue pipe to be fitted onto the unit.
The necessary allowance must be made to allow the flue pipe to be fitted, after the unit was
installed.
•The casing is manufactured in a rectangular shape. This shape must be maintained during the
building process. The casing must be protected from any damage that will cause it to deform.
Failing to do this, might prevent the frame from fitting properly at the final stage of the
installation.
Fitting the unit
The unit is fitted by sliding it into place, inside the casing.
NOTE: Becau e of the weight of the unit, help might be required, to prevent per onal injury.
Align the guides inside the outer casing, to the guides underneath the unit.
Guide on Unit
Guide inside
outer casing
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Push the unit all the way back until it reaches a dead stop.
The unit is held in place by gravity. There is no mechanical fastening required.
Fitting the frame
The frame consist of 2 sections, the main frame, and the bottom frame.
Guide on Unit
Guide inside
outer casing
Main Frame
Bottom Frame
13

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Hook the main frame in place, and slide down.
Then hook the bottom frame in place
14

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
OPERATING THE UNIT
NOTE: The tove may emit an irritating ga when u ed for the fir t time, and it may mell a
little. The ga i not toxic, but it i recommended to open a window or a door to provide
additional ventilation in the room. Let the fire burn with a high draught until all trace of ga
have di appeared and no moke or mell can be detected.
Door operation
To open the door, rotate the handle through 90° ant-clockwise, and swing open.
To close the door, first rotate the handle to a horizontal position, then swing the door closed, until it
stops against the body of the unit. Gently yet firmly rotate the handle clockwise through 90° to latch
the door.
An additional door setting is provided, allowing the door to be latched at a slightly open position.
From the closed position, rotate the handle anticlockwise approximately 45°. Gently pull back, until
the door catch, touches the catch rest on the body. Let the handle swing back clockwise, until it rests
in place.
This door setting can be used on fire start-up, to provide additional air to the fire thereby allowing the
fire to be established, and the unit to heat up faster.
NOTE: The handle on thi unit might reach uncomfortable temperature during continuou
u e. Alway fir t te t the handle temperature before gripping it. When in doubt, alway u e a
glove or oven mitt .
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SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Aeration settings
The burn pattern is set by controlling the air flow entering the unit. This is done by sliding the
aeration lever left and right.
Sliding LEFT reduces the airflow, and causes a slower and cooler burn.
Sliding RIGHT increases the airflow, and causes a hotter flame, that will burn out faster.
Burn y les.
This unit is design for burning wood, efficiently. See the section of wood selection.
Firstly, pack a few small twigs and some newspaper or firelighters in the unit.
Pack the unit with hard, dry wood. Also ensure that there’s no wood resting against the window, this
would dirty the window.
Ensure that air gaps are provided between the logs. This is vital to allow the flames to burn in-
between the logs, and thereby a proper fire can be established. It is easier for the fire to spread from
the inside outward, than from the outside, inward!
Once the unit has been loaded with a full load of wood, light the wood.
Close the door to the slightly ajar latched position, and open the aeration adjuster fully. Failing to do
so might lead to smoke being spilled in to the room.
The unit is designed to function efficiently when all steel parts have reached temperature. It is
therefore important the let the unit heat up first before it should be set to a slow burn condition.
Leaving the door at the slightly ajar position, allows for a large flame, heating up the unit.
Aeration Slider
16

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
The initial heat-up period will depend on the local atmosphere conditions and the type and amount of
wood that is burned. nder most conditions this heat-up period will be between 10 and 20 minutes,
but it could be even longer.
During the burning cycle wood can be added at any stage. It is better to add smaller pieces of wood,
more regularly, than to wait until the fire turned into coals only and then adding a large load.
Wood sele tion
The type and size of wood used will play a big role in the performance of this fireplace. It is
important to note that the amount of heat conveyed to the room is determined by the wood burned. A
small fire can only heat a small area.
Types of wood.
Softer woods will give of larger, hotter flames and will burn out faster, while leaving less coals.
Harder woods will give of slower, cooler flames, burning much longer, while leaving more coals.
During start up, softer wood can be used for an initial hot burn. Softer woods will also assist in
getting a hot flame going again, if only a bed of glowing coals are left after a long burn cycle.
For long burn cycles, harder woods are better, to provide a less intense but longer burning cycle.
NOTE: Avoid the u e of treated wood . Thi can cau e uncontrolled flame , over heating or
even depo it that could damage the unit.
Dry / Wet wood.
Always burn dry wood only.
Wet wood that is unseasoned will not burn efficiently and will more than likely cause excessive
smoking.
Wood should have been stored (seasoned) in a dry but ventilated place for a year before burning.
Green (freshly cut) wood contains about 50% moisture. Heat from the fire has to drive this off as
steam before the wood can burn effectively. This heat is lost in the formation of steam.
Apart from burning your wood in an efficient appliance, burning seasoned wood is the greatest step
towards efficiency. Air-dried seasoned wood has about 20% moisture content; this reduction makes a
tremendous difference to the heat output of the fire.
Burning wet wood, will also limit the effectiveness of the combustion process, and might lead to
excessive formation of soot in the unit and the flue pipe.
NOTE: Exce ive oot build-up can lead to a chimney fire (fire burning throughout the length
of the flue). Thi hould be avoided.
Log sizes
17

SLOW COMB STION FIREPLACE INSTALLATION AND OPERATION INSTR CTIONS
Logs with smaller diameters, or split logs will burn more effectively and more efficiently.
Any length of log, can be burned, as long as if fits inside the unit. Care should be taken to prevent the
logs from resting against the window.
Smaller logs and twigs are recommended to establish the fire. Larger pieces of wood are
recommended for longer burning cycles, while even larger bulky wood chunks should be avoided as
it would not burn efficiently.
CARE & MAINTENANCE
This unit is designed to operate for many years with minimum maintenance required. Keeping the
unit in a neat and clean condition will extend the lifespan of the unit.
Ash
It is advisable to always maintain a layer of ash at the bottom of the unit. It is thus not necessary to
clean the unit after each use.
Ash can be cleaned by scooping up loose ash inside the unit.
For thorough cleaning from time to time, all ashes can be vacuumed out, and the inside can be wiped
down, with a soft, moist cloth. The inside can be touched in with Jetmaster heat resistant paint. DO
NOT use any other type of paint.
Always ensure that the unit is dry, after cleaning. Excessive moistened areas, or areas where water
might have collected, must be avoided at all times to limit the possibility for corrosion. If necessary,
light a fire in the unit, so that it can heat up and all moisture can be driven away.
The window.
This fireplace is designed with a air wash system that ensures a film of fresh air running over the
inside of the window, limiting the amount of soot build up.
During different burn cycles, the amount of soot noted on the window, will vary. Slow burn cycle
will cause more soot build-up, while subsequent hot burn cycles, can burn away some of this soot
leaving a cleaner window.
From time to time it is necessary to clean off the accumulated soot / ash from the inside surface of
the window. The amount of soot which may deposit on the window might depend upon the local
amount of draught present or the regulation of the air control.
A practical method for cleaning the window is to use some kitchen roll - soak it with hot water, and
dip it into some ashes. Rub the glass with the paper, and you will see that most of the soot will
disappear. Rinse the glass with clean water and dry completely before burning the fireplace.
If it is necessary to clean the glass more thoroughly, we recommend a “Glass cleaner”.
18