FireBird P90 User manual

Includes Homeowner Instructions
READ AND SAVE THESE INSTRUCTIONS FOR REFERENCE.
TECHNICAL MANUAL
REVISION 2. © 30 APRIL 2012
For use with No. 2 Oil
CONDENSING BOILER
MANUFACTURED BY:
FIREBIRD,
BALLYMAKEERA,
COUNTY CORK,
IRELAND.
DISTRIBUTED BY:
QUINCY HYDRONIC TECHNOLOGY, INC.
3560 LAFAYETTE RD., BLDG 2, UNIT A
PORTSMOUTH, NH 03801
PHONE: [phone]
FAX: [phone]

Firebird Condensing Boiler
1
CONTENTS
PAGE
1. HOMEOWNER INSTRUCTIONS
Foreword ...................................................................................................................................................... 2
Popular ................................................................................................................................................................. 3
Utility ..................................................................................................................................................................... 3
Burner Lockout .......................................................................................................................................... 4
2. BOILER TECHNICAL DETAILS
2.1 Boiler Technical Specifications ..................................................................................................... 5
2.2 Boiler Dimensions ................................................................................................................................... 6
2.3 Spare Parts ....................................................................................................................................................... 7
3. STANDARDS & SAFETY NOTICES ......................................................................... 10
4. INSTALLATION
4.1 Installation Guidelines ........................................................................................................................... 12
4.2 Positioning the Boilers ......................................................................................................................... 13
4.3 Vent Systems ................................................................................................................................................. 14
4.4 Boiler Piping .................................................................................................................................................. 21
4.5 Wiring ................................................................................................................................................................... 23
4.6 Condensate Disposal ............................................................................................................................ 25
5. BURNER
Burner Settings ...................................................................................................................................................... 26
6. COMMISSIONING ................................................................................................................................. 27
9. SERVICING ......................................................................................................................................................... 29
Service Record ....................................................................................................................................................... 30
WARRANTY REGISTRATION ............................................................................................. 33

Firebird Condensing Boiler
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2
HOMEOWNER INSTRUCTIONS
Foreword
We would like to thank you for purchasing a high
efficiency Firebird condensing domestic central
heating oil-fired boiler. This instruction manual is
produced for the reference and guidance of
qualified installation technicians. The boilers and
burners are supplied as matched units, tested and
approved to UL, NFDA, DOE and ETL Standards.
Firebird condensing boilers are built in
accordance with the ASME Boiler and Pressure
Vessel Code and bear the "H" stamp.
You should ensure that all installation and
service is carried out by a licensed technician.
It should be noted that it is the responsibility of
the Installer/Homeowner to ensure that the
boiler is properly installed and commissioned.
Failure to do so may invalidate the boiler
guaranty.
SERVICING
The boiler requires servicing on an annual basis
to ensure it maintains its efficiency, continues
to perform reliably and as a regular check
on its safety features. It is important that
servicing should be performed by a licensed oil
burner technician. Do not tamper with the
unit or controls - call your service personnel.
Contact service personnel before remodeling,
before extended shut downs, and before start
up of your Firebird boiler.
All appropriate manuals, oil boiler codes,
burner and controls should be studied and
their requirements adhered to and used in
conjunction with these instructions.
We realize that it is not possible to answer all
questions about the Firebird boiler system in this
manual. Reading this installation manual does not
make the reader an expert in all aspects of
installation and operation, and does not replace
the need for a licensed heating contractor. We
urge you to contact your installing contractor or
distributor if you have questions about any aspect
of your boiler's performance. Our main concern is
that you are satisfied with your boiler and its
performance. We require that your contractor
complete efficiency tests using instruments, as
reading of this manual alone for installation and
servicing procedures, cannot replace the critical
advantage provided by training and years of
experience.
How a condensing boiler works
Firebird oil-fired condensing boilers have an
AFUE rating of 91.5% and are independently
certified to ENERGY STAR AFUE Standards.
They use less fuel and have lower running costs
than non-condensing boilers. Because of their
increased efficiency they emit less carbon
dioxide than non-condensing boilers, which
helps to reduce global warming. The incredible
efficiency of the Firebird Condensing Boiler is due
to the development of a single boiler unit with
two unique heat exchanger units. This gives an
exchange surface greater than non-condensing
boilers.
This additional surface area increases the amount
of heat extracted from the combustion process
and thus reduces the heat wasted to the
atmosphere. So much heat is extracted from the
combustion gases that the water vapor element
condenses into liquid form, releasing the latent
heat that was used to create the vapor in the first
place. It is this heat gain that gives the
condensing boiler its significant advantage over a
non-condensing model. In order to maximize
boiler efficiency, the water in the boiler’s heat
exchanger must be cooled down to about 140˚F
/ 55˚C or less, this means that the boiler is
working at its maximum efficiency
The Firebird Condensing Boiler is suitable for
under floor heating, provided the return
temperature is above 110˚F / 40˚C. at all times.
The Firebird Condensing Boiler (even when not
working in condensing mode) will still operate at
extremely high efficiencies, making it suitable for
installation in an existing heating system without
alteration to the radiator sizes.
The burner is factory set for use with
No.2 Fuel Oil.

Firebird Condensing Boiler
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3
HOMEOWNER INSTRUCTIONS
Utility Operating Procedure
(All outputs)
CONFIRM HEATING SYSTEM IS FILLED
WITH WATER AND VALVES ARE OPEN
TO START THE BOILER FOLLOW THIS SEQUENCE:
Turn on fuel supply.
Switch on power supply to boiler.
Set the boiler operating high limit control aquastat to
the required temperature. The aquastat controls the
burner and circulator operation by automatically
maintaining the required boiler water temperatures
upon a call for heat. Safe operation is also maintained
by the burner control system, which provides the
required ignition and shut off sequence.
Turn on room thermostat.
THE BOILER CAN BE TURNED OFF BY ANY OF THE
FOLLOWING MEANS:
 Turn the switch to OFF
(mounted on side of boiler).
 Turn OFF the main emergency switch to the boiler
(usually at the top of the cellar stairs).
 Always keep the oil supply valve closed if the
burner is shutdown for and extended time.
Note: Burner ignition is delayed until oil
line heater is satisfied ( 1 to 2 min)
POPULAR BOILER UTILITY BOILER
Popular Operating Procedure
(All outputs)
CONFIRM HEATING SYSTEM IS FILLED
WITH WATER AND VALVES ARE OPEN
TO START THE BOILER FOLLOW THIS SEQUENCE:
Turn on fuel supply.
Switch on power supply to boiler.
Set the boiler operating high limit control aquastat to
the required temperature. The aquastat controls the
burner and circulator operation by automatically
maintaining the required boiler water temperatures
upon a call for heat. Safe operation is also maintained
by the burner control system, which provides the
required ignition and shut off sequence.
Turn on room thermostat.
THE BOILER CAN BE TURNED OFF BY ANY OF THE
FOLLOWING MEANS:
 Turn the burner switch to OFF
(mounted on side of boiler).
 Turn OFF the main emergency switch to the boiler
(usually at the top of the cellar stairs).
 Always keep the oil supply valve closed if the
burner is shutdown for and extended time.
Note: Burner ignition is delayed until oil
line heater is satisfied ( 1 to 2 min)

Firebird Condensing Boiler
The boiler is factory fitted with a burner control box lockout safety feature which operates automatically if a fault
occurs in the burners operation. Should this occur, the light on the front of the burner (see photo below or burner
manual) will illuminate and its cause must be investigated.
This could be caused by:
A. An interruption in the fuel supply. (Eg. empty oil supply tank or clogged filter)
B. An electrical supply fault.
C. A fault with the burner or its safety control system.
D. The failure of a component. (Eg. photo cell)
E. Worn or dirty oil nozzle.
Before attempting to restart the boiler, the front panel (Utility boiler only) and the burner cover should be removed
and a visual check should be made for any obvious problems with burner such as oil leaks, loose connections etc.
ENSURE OIL TANK CONTAINS CORRECT GRADE FUEL NO. 2 OIL
DO NOT START BURNER UNLESS ALL CLEANOUT DOORS ARE SECURED IN PLACE
DO NOT ATTEMPT TO START THE BURNER WHEN EXCESS OIL HAS ACCUMULATED, WHEN
THE UNIT IS FULL OF VAPOUR, OR WHEN THE COMBUSTION CHAMBER IS VERY HOT
TO RESTART THE BOILER
1. Press reset button once only, see photo below.
2. Ensure that the boiler thermostat, room thermostat and any external controls
connected to the boiler are set to call for heat.
3. Check that the oil tank valves are open and there is sufficient oil in the tank.
4. Check that the burner lockout light is unlit and with the ‘main switch ON’,
the boiler will be ready to begin its start sequence.
1
4
HOMEOWNER INSTRUCTIONS
BURNER LOCKOUT
Reset Button
(Light)

Firebird Condensing Boiler
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5
2.1 - BOILER - TECHNICAL DETAILS
Steel or Copper Pipe Not Plastic to be used for a minimum of 4 ft off the boiler supply & return.
Stainless steel exhaust pipe to be used from the boiler breeching to the chimney thimble.
Boiler Model P90/U90 P120/U120
Max Heat Output BTU/HR 95,000 121,000
CONNECTIONS
Heating Flow 1” NPT 1” NPT
Heating Return 1” NPT 1” NPT
Drain Off Cock 3/4” NPT 3/4” NPT
Condense Drain Off Connection. 3/4” PLASTIC 3/4” PLASTIC
WATER CONTENT
Water Content Boiler 6 Gallons 6 Gallons
FLUE (Indoor Boilers) Concentric Flue
Balanced Flue Assembly 5” 5”
Conventional flue Socket 5” id. 5” id.
Flue Draught Reqd. (Min W.C.) 0.040” 0.040”
Conventional Flue (Max W.C.) 0.15” 0.15”
TEMPERATURE CONTROL
Boiler Central Heating Control 110˚F - 200˚F
HEATING SYSTEM (SEALED)
Safety Valve Operating Pressure 30 PSI
Pressure Jet Oil Burners RIELLO RDB 2.2R
Fuel No. 2 Oil
Electrical Supply 110v. AC 60Hz To be fused at main panel

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2.2 - BOILER - DIMENSIONS
Model Output Weight Dimensions (inches)
BTU/HR lbs H W D A B C E F G
Utility U90 95,000 282 33.25 17.5 24 29.75 8.75 6.2 3.7 4.9 19.75
Utility U120 121,000 288 33.25 17.5 24 29.75 8.75 6.2 3.7 4.9 19.75
Front View Side View RearView Top View
A
BC
B
D
A
C
E
I
J
H
W
G
F
Model Output Weight lbs Dimensions (inches)
Kw/hr(incl. Burner) H W D B C E F G
PopularP90 95,000 247 27 17.4 15 8.7 6.4 3.9 4.8 19.75
PopularP120 121,000 254 27 17.4 15 8.7 6.4 3.9 4.8 19.75
BurnerDepth = 10”
Front View Side View Top View
C
ED
W
GH
F
BB
POPULAR
UTILITY

Firebird Condensing Boiler
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2.3 - POPULAR BOILER - PARTS
POPULAR BOILER - Models P90 & P120
No. DescriptionP90 & P120
1 Burner panel 211545
2 Right Side Panel 211542
3 Left Side Panel 211543
4 Back Panel 211544
5 Insulation 110917
6 Shell 310921
7 Burner Riello RDB2.2R 90’000btu. 412977
Burner Riello RDB2.2R 120’000btu. 412978
10 Graphite Door Seal 111314
11 Door Gasket 110918
12 Boiler Door 210910
13 Condense Trap 110935
14 Condensate Hose 111537
15 Boiler Control Kit FB Kit
16 Burner Gasket 3005787
17 Burner Flange 300638
18 Air Hose. 111902
3
4
5
6
2
1
13
10
11
12
14
15
1. Frame 2. Cone 3. Float
4. Screw Cap 5. Connector
1
2
3
4
5
16
17
18
7

Firebird Condensing Boiler
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2.3 - UTILITYBOILER - PARTS
ENVIROMAX UTILITY - U90 & U120
No. DescriptionU90 & U120
1 Front panel 212336
2 Left side panel 212343
3 Right side panel 212344
4 Top panel 212337
5 Back Support 212338
6 Base 211874
7 Back support Bracket 210916
8 Right support Bracket 210915
9 Left Support Bracket 213012
10 Boiler Shell 110921
11 Insulation Jacket 110910
12 Hydrostat Operation Control 113026
13 Burner Gasket 3005787
14 Burner Flange 3006384
15 Burner Riello RDB2.2R 90’000btu. 412977
Burner Riello RDB2.2R 120’000btu. 412978
16 Air Hose. 111902
17 Flue Gas Analysis Blank. 110923
18 Condense Trap 110935
19 Condensate Hose 111537
17
13
12
3
4
5
6
7
8
9
10
2
1
11
14
16
15
18
19
1. Frame 2. Cone 3. Float
4. Screw Cap 5. Connector
1
2
3
4
5

Firebird Condensing Boiler
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2.3 BAFFLES - POPULAR & UTILITY BOILERS
• • • • PATENTED BOILER DESIGN • • • •
P90 & P120 Tube Baffle (4 Off) - Part No. 110907
P90 & P120 Door - Part No. 210910
P90 & P120 Graphite Door Seal - Part No. 111314
P90 & P120 Door Gasket - Part No. 110918
P90 & P120 Tube Baffle (1 Off) - Part No. 110908
P90 & P120 Tube Baffle (4 Off) - Part No. 110909
P90 Smoke Baffle R4 - Part No. 212028
P120 Smoke Baffle oblong - Part No. 212122

Firebird Condensing Boiler
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STANDARDS & SAFETY NOTICES
PRE- INSTALLATION CHECKS
The installer should also be aware of his/her responsibilities under regarding aforementioned act.
The interests of safety are best served if the boiler is installed and commissioned by a competent trained licensed technician.
IMPORTANT INFORMATION
Please read this page carefully.
• ALL BOILERS MUST BE INSTALLED IN ACCORDANCE WITH NATIONAL, STATE AND LOCAL
PLUMBING, HEATING AND ELECTRICAL CODES AND ORDINANCES, AS WELL AS THE
REGULATIONS OF THE SERVING ELECTRICAL, WATER AND GAS UTILITIES.
• All systems should be designed by competent contractors, and only persons knowledgeable
in the layout and installation of heating systems should attempt the installation of any
boiler. It is the responsibility of the installing contractor to see that all controls are
correctly installed and operating properly when the installation is completed.
• Do not use gasoline, crankcase drainings, or any oil containing gasoline.
• Do not burn volatile garbage, naphtha or other flammable liquids other than No. 2 fuel oil.
All flammable liquids (especially gasoline), chemicals, rags, paper, wood scraps, debris, etc.,
should be kept away from the boiler at all times. Keep the boiler area clean and free of all fire
hazards.
• Please read the literature and warranties supplied by the manufacturers of the various
accessory equipment.This equipment is warranted by the respective manufacturers, not by
Quincy Hydronic Technology, Inc. Each piece of equipment must be installed and used
according to the recommendations of the manufacturer.
Codes and Regulations:
Installation of the boiler, burner, oil tank and related equipment must conform to national, state and
local regulating agencies and codes applicable to the installation of the equipment. In the absence of
local requirements, the following codes apply:
The above codes are available from:
National Fire Protection Association (NFPA) CSA International
Battery March Park 8501 East Pleasant Valley Road
Quincy, MA 02269 Cleveland, OH 44134
http://www.nfpa.org http://www.csa-international.org
A. NFPA - #31 Installation of Oil Burning Equipment
B. NFPA - #70 National Electric Code
C. NFPA - #211 Chimneys and Vents
D. ANSI - #Z223.1 National Fuel Gas Code
E. ANSI - Domestic Gas Conversion Burner
F. CAN/CGA - B149 Installation Codes
G. ANSI - CSD-1
H. CSA -C22.1 Canadian Electrical Code, Part1

Firebird Condensing Boiler
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Safe use of Fuel Oil.
These fuels give off a flammable vapour when heated
moderately. Vapour ignites easily, burns intensely and
may cause explosion. The vapour can follow along at
ground level for considerable distances from open
containers and spillages collecting as an explosive
mixture in drains, cellars, etc.
Fuels remove natural oils and fats from the skin and
this may cause irritation and cracking of skin. Barrier
cream containing lanolin is highly recommended
together with good personal hygiene and where
necessary appropriate personal protection
equipment. (P.P.E.)
Fuel oil may also cause irreversible damage to health
on prolonged or repeated skin contact.
Always store fuels in a properly constructed and
labelled tank. Always handle fuel in open air or well
ventilated space away from sources of ignition and
refrain from smoking.
Always drain fuel using a proper fuel retriever, funnel
or mechanical siphon. Never apply heat to a fuel tank,
container or pipework. Never siphon fuel through
tube by mouth. If accidentally swallowed contact
doctor immediately and do NOT induce vomiting.
Avoid inhaling fuel vapour as this can cause light
headedness and seriously impair judgement.
Any appliance that burns natural gas, propane gas, fuel
oil, or coal is capable of producing carbon monoxide
(CO). Carbon Monoxide (CO) is a gas which is
odorless, colorless and tasteless but is very toxic. CO
is lighter than air and thus may travel throughout the
building.
BRIEF EXPOSURE TO HIGH CONCENTRATIONS
OF CO, OR PROLONGED EXPOSURE TO LESSER
AMOUNTS OF CO MAY RESULT IN CARBON
MONOXIDE POISONING.
EXPOSURE CAN BE FATAL AND EXPOSURE TO
HIGH CONCENTRATIONS MAY RESULT IN THE
SUDDEN ONSET OF SYMPTOMS INCLUDING
UNCONSCIOUSNESS.
Symptoms of CO poisoning include the following:
• dizziness
• headache
• nausea
• vision problems
• loss of muscle control
• weakness
• shortness of breath
• unclear thinking
• unconsciousness
The symptoms of CO poisoning are often confused
with those of influenza, and the highest incidence of
poisoning occurs at the onset of cold weather or
during flu season. A victim may not experience any
symptoms, only one symptom, or a few symptoms.
Suspect the presence of carbon monoxide if
symptoms tend to disappear when you leave
your home.
The following signs may indicate the presence of
carbon monoxide:
• Hot gasses from appliance, venting system pipes
or chimney, escaping into the living space.
• Flames coming out around the appliance.
• Yellow colored flames in the appliance.
• Stale or smelly air.
• The presence of soot or carbon in or around
the appliance.
• Very high unexplained humidity inside the building.
IF ANY OF THE SYMPTOMS OCCUR, OR IF
ANY OF THE SIGNS OF CARBON MONOXIDE
ARE PRESENT, VACATE THE PREMISES
IMMEDIATELY AND CONTACT A QUALIFIED
HEATING SERVICE COMPANY, OR THE FIRE
DEPARTMENT.
ONLY QUALIFIED, LICENSED SERVICE
CONTRACTORS SHOULD PERFORM
WORK ON YOUR FIREBIRD BOILER.
1. Switch off all electrical and other ignition
sources.
2. Remove all contaminated clothing to safeguard
against fire risk and skin damage. Wash affected
skin thoroughly with soap and water and
remove clothing to a safe well ventilated
area and allow to air before cleaning.
3. Contain and smother the spill using sand or
other suitable oil absorbent media or
non-combustible material.
4. Do not allow fuel to escape into drains.
If this happens, contact the relevant
authorities in your area.
5. Consult local Authority about disposal of
contaminated soil.
If fuel is accidentally swallowed:-
* Seek medical attention immediately. Do NOT
induce vomiting.
If fuel is splashed into eyes:-
* Wash out with running water for at least ten
minutes and seek medical attention.
WARNING FUEL SPILLAGE
SAFETY
FIRST AID
11
STANDARDS & SAFETY NOTICES

Firebird Condensing Boiler
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12
4.1 - INSTALLATION GUIDELINES
BURNER
The burner is factory set for use with No. 2 Oil.
ROOM SEALED BALANCED FLUES
“The flue pipe should be mounted so that it is separated
from any combustible material forming a part of the
building by a minimum of 2”.
Such combustible material may take the form of cladding
on the surface of a non-combustible wall through which
the flue outlet passes. In such a case, the cladding
adjacent to the flue outlet should be replaced by
non-combustible material extending not less than 2”
beyond the outside dimensions of the flue outlet.
The wall through which the flue outlet passes may itself be
of combustible material, and if so the flue outlet, where it
passes through the wall, should be surrounded by
non-combustible insulating material not less than 2” thick
(see diagram on Page 13). The insulating material itself
should be contained in a steel liner to provide the
necessary structural rigidity and to prevent moisture
reaching the insulating material.”
Please note following important points before
commencing installation. Failure to do so will
invalidate warranty
INSTALLATION & COMMISSIONING:
Boilers must be installed, commissioned and serviced by
qualified and licensed technician and as set out in the
installation manual, using correct test equipment.
PLASTIC PIPING - WARNING
The boiler thermostat control and safety system is not
designed, and must not be relied on, to protect plastic
pipe (PEX) from overheating. Plastic pipe must never be
connected directly to the boiler. If you choose to use
plastic pipe anywhere on your heating circuits, then
please consult the plastic pipe manufacturer for their
instructions on how to ensure their product never
overheats. Our boiler control and safety high limit
controls are not designed to fulfil this function. (They
may suggest the fitting of independent pipe thermostats,
or thermostatic mixing valves linking flow and return).
• QHT accepts no responsibility for failure of plastic
piping and fittings for what ever reason.
WARNING:
The manufacturer cannot accept responsibility for any
damage to persons, animals or property due to error in
installation or in the burner adjustment or due to
improper or unreasonable use or non observance of the
technical instruction enclosed with the burner, or due to
the intervention of unqualified personnel.
BOILER OPERATING AND HIGH LIMIT
CONTROLS
The HIGH LIMIT CONTROL on the boiler allows the
homeowner to vary the water flow temperature from a
low of 110˚F to a high of 200˚F, depending on the model.
In cases where the water level in the heating system is
below elevation to boiler, a low water cut off
is supplied. This is to prevent the boiler from being
dry-fired.

Firebird Condensing Boiler
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4.2 - POSITIONING THE BOILER
Ensure that adequate clearance is available for making the water and flue connections.
As the boiler is serviced from the front, no headroom clearance is necessary but a
clearance of 3 ft must be available at the front of the boiler.
The boiler must be installed on a level NON-COMBUSTIBLE FLOOR capable of supporting
the weight of the boiler and its water contents.
Sound levels must also be a consideration.Whilst Firebird boilers are amongst the quietest boilers on
the market, some homeowners are particularly sensitive and the following points should be considered:
1. Tiled surfaces in a small room will amplify noise - particularly if the wall construction is hollow.
2. If a conventional flue passes through a bedroom, it is capable of transmitting noise.
3. Side wall balanced flue terminals can produce exhaust noise on the outside terminal
and this should be considered when siting near adjacent property.
4. The Firebird Balanced Flue Kit has been specifically designed for
Firebird’s indoor boilers.The use of third party side wall vent kits
is not recommended and will affect its warranty.
5. The placement of the boiler should take into account
the collection and disposal of condensate
products.
6. Space around the unit must remain free
of clutter and debris so that clearances
are maintained.
• It is recommended that a suitable
corrosion inhibitor is added to the
heating system.
• New and existing systems should be
treated with chemical cleaner and
properly flushed before the boiler is
fitted and corrosion inhibitor added.
• In areas of hard water a suitable
descaler would also be required.
Allow a 2”clearance
around the flue from
combustible surface.
Seal with flange
or silicon to prevent
ingress of moisture
and combustion gas
6“
6“
Allow a 6”clearance around
the boiler fromcombustible
surface.
Finishing Wall Plate

Firebird Condensing Boiler
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4.3 - VENT REQUIREMENTS
BALANCED FLUE LOCATION
Notes: 1. The terminal should be positioned to avoid combustion products entering
the building or accumulating in stagnant pockets around buildings.
2. The terminal must be installed 7 ft above public walkway or in a
position where any person has access to it (i.e. a balcony).
3. A heat protection shield should be fitted if the terminal is less than 36” from
a plastic or painted gutter or less than 18” from painted eaves.
* FIREBIRD RECOMMENDS THAT THE FLUE SHOULD BE A MINIMUM DISTANCE
OF 4 FT FROM OPENINGS SO THAT IT DOES NOT CAUSE A NUISANCE AND
PERMITS THE DISPERSAL OF COMBUSTION PRODUCTS.
ALWAYS CHECK FOR ANY BUILDING REGULATION AMENDMENTS WHICH MAY
HAVE BEEN ISSUED AFTER THE PUBLICATION OF THIS MANUAL
A
A
C
B
C
A. Horizontal from opening,
airbrick, opening window
etc.
B. From an internal or
external corner.
C. Below an opening,
airbrick, opening window
etc.
*Where the terminal is within 4 ft of any plastic material, such material should be protected from the
effects of combustion products of fuel. There are additional general requirements in most Regulations and
Standards that the flue must be positioned so that it does not cause a nuisance and permits the dispersal of
combustion products.
NOTE: The Buildings Regulations clearances shown above are minimum allowed. To take account of
prevailing site conditions it is advisable wherever necessary to follow the manufacturers preferred
recommendation. If in doubt contact manufacturer for advice.
Building Regulations
 
BUILDING REGULATIONS ABC
United States & Canada 48” 36” 48”

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4.3 - VENT REQUIREMENTS
Minimum distances to terminals in inches as measured from top of the chimney
or the rim of a low level discharge opening.
APPLIANCE BURNER TYPE DIRECT VENT
A. Directly below an opening, air vent, opening window etc 48”
B. Horizontally to an opening, air vent, opening window etc 48”
C. Below a gutter or eaves 36”
D. Above door, window, or gravity inlet 12”
E. From vertical sanitary pipework 12”
F. From an internal or external corner or surface or boundary alongside the terminal 36”
G. Above ground or expected snow level 12”
H. From a surface or boundary facing the terminal 60”
J. From a terminal facing the terminal 60”
K. Vertically from a terminal on the same wall 60”
L. Horizontally from a terminal on the same wall 40”
M. Above the highest point of an intersection with the roof 36”
N. Above a vertical structure less than 120” from the side of the terminal 24”
O. From a ridge terminal to a vertical structure on the roof 60”
O
MN
N
L
FF
K
B
EA
G
F
J
C
Boundary
H
F
Boundary
D
Recommended clearances for Open Flues,
and Balanced Flues fitted to Oil Fired Boilers.
These notes form an integral part of the information shown above.
1. Terminals should be positioned so as to avoid products of combustion accumulating in stagnant pockets
around the building or entering into buildings.
2. Vertical structure in N and O include tank or lift rooms, parapets, dormers etc.
3. Terminating positions A to L are only permitted for appliances that have been approved for side wall flue
discharge.
4. Terminating positions must be at least 6 ft distant from an oil storage tank unless a wall with at least
30 mins fire resistance and extending 18” higher and wider than the tank is provided between the tank
and the terminating position.
5. Where a flue is terminated less than 36” away from a projection above it and the projection consists
of plastic or has a combustible or painted surface, then a heat shield of at least 36” wide should be
fitted to protect these surfaces.
6. The terminal must be 7 ft above the ground, deck, flat roof or other place to
which any person has access, the terminal must be protected by a guard.
7. Notwithstanding the dimensions given in the drawing and table, a terminal should not be sited closer
than 24” to combustible material.

Firebird Condensing Boiler
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4.3 - VENT REQUIREMENTS
BALANCED FLUE BOILERS
The Firebird boiler may be set for room sealed balanced flue operation, using a Firebird condensing
balanced flue kit. This kit does not draw combustion air from inside the room. It is drawn from
outside direct to the burner by the airpipe supplied with the boiler. Flue gases are expelled
through the same kit. However, if the boiler is installed in a compartment or small room, some
ventilation air is necessary to maintain acceptable temperature in boiler area.
Use of flue systems other then the matching Firebird
room sealed concentric flue, will invalidate warranty.
1 sq"/2000 BTU/HR
1 sq"/2000 BTU/HR
1 sq"/1000 BTU/HR
1 sq"/1000 BTU/HR
Balanced flue boiler in room (eg. kitchen) does not require individual ventilation.
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BALANCED - FLUE BOILERS IN COMPARTMENTS

Firebird Condensing Boiler
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4.3 - VENT REQUIREMENTS
Ventilation and Combustion Air
Conventional Flue Boilers
An adequate supply of combustion and ventilation air is essential for efficient and safe boiler
operation and the openings for this should be positioned to cause least possible draught, with no
possibility of being accidentally blocked.
Please note: NFPA Code of Practice for Oil Firing, requires a permanent air inlet opening of 4 sq” per
3413 BTU/HR (above 17060 BTU/HR) of boiler rated output is needed.
Also, when the boiler is installed in a compartment or confined space, ventilation openings are
required to ventilate and to avoid overheating in the boiler area.
1 sq"/
2000 BTU/HR
1 sq"/
2000 BTU/HR
1 sq"/
1000 BTU/HR
1 sq"/
1000 BTU/HR
1 sq"/
2000 BTU/HR
1 sq"/
5000 BTU/HR
OPEN FLUE
BOILER IN ROOM
BOILER COMPARTMENT
VENTILATED FROM OUTSIDE
BOILER COMPARTMENT
VENTILATED FROM ADJOINING ROOM
Combustion & Ventilation air supply for conventional
open flue boilers in a confined space.
The figures shown are free areas of grilles in inch2
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Regulations Clearances found in NFPA #1
Please Carefully Note:
A. Most boiler installations in garages are not permitted
B. Check VL 4 NFPA
Definitions
Combustion Air : Air required directly by boiler oil burner for combustion process.
Ventilation Air : Air required in room for ventilation, cooling, etc. and to promote a healthy
living environment.
Unconfined Space : Any space whose volume is equal to or greater than 50 cu. ft. per 1000
BTU/HR of the aggregate input rating of all fuel-burning appliances installed
therein.

CONDENSATE PLUME DISPERSAL
When choosing the location for a condensing boiler,
special consideration must be given to the positioning of
the flue terminal. Care should be taken to locate it so as to
prevent either the end user or their neighbours perceiving
the plume to be a nuisance.
1. Plumes can extend out horizontally and can also drift
out to the sides and above the terminal. Care needs to
be taken, therefore, to avoid the plume reaching
adjacent surfaces, particularly windows and
neighbouring dwellings.
2. Flue terminals need to be located where air can pass
freely across them to disperse vapours.
3. The effect of the moisture generated must be
considered in relation to the possible corrosion of
metal parts it might reach and to the possible
formation of ice on pathways in freezing conditions.
4. Keep flue terminals a minimum of 4ft (horizontally)
from openings in the building.
5. Do not install flue terminals directly below a window.
6. Do not install flue terminals next to a door.
7. Do not install flue terminals within 4ft of ventilated
soffits or eaves.
8. Keep flue terminals at least 4ft away from a surface or
boundary facing the terminal.
9. Follow the manufacturer’s appliance instructions.
Firebird Condensing Boiler
4
18
4.3 - VENT SYSTEMS
CONVENTIONAL FLUE SYSTEMS
IMPORTANT
The Firebird condensing boiler must not be installed
with existing flue systems. A flue system suitable for
wet flues must be used. If a flue system which is
unsuitable is used, it will invalidate the warranty.
Because of the high operating efficiencies of the
Firebird condensing boilers and low flue gas
temperatures, it is necessary to pay extra special
attention to the flues and chimneys.
Existing chimneys must be lined with a liner certified as
suitable for condensing oil boilers by flue manufacturer.
Twin wall insulation must be used for external
applications, with seals and stainless steel inner skin.
Only polypropylene or high grade stainless steel can be
used between boiler and chimney in an internal
installation, aluminium or asbestos type material must
not be used (Vitreous enamel must not be cut).
Condensate must be able to run back into the flue
chamber of the boiler and not escape, as up to
1.5 Quarts of condensate can be produced in a
conventional flue. No trap is required in the flue system.
The terminal must be positioned to avoid combustion
products entering the building and as per Building
Regulations.