Empire Comfort Systems FG28BMK(N User manual

Page 1
INSTALLATION INSTRUCTIONS
POWER-VENT
HIGH-EFFICIENCY FIREPLACE
MODELS
FG28BMK(N,P)-1
™
WARNING: If not installed, operated and maintained in ac-
cordance with the manufacturer’s instructions, this prod-
uct could expose you to substances in fuel or from fuel
combustion which can cause death or serious illness.
Attention: Check local codes for venting requirements.
This appliance may be installed in an
aftermarket, permanently located,
manufactured home (USA only) or mobile
home, where not prohibited by state or local
codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases, unless a certied kit is used.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
— Do not store or use gasoline or other am-
mable vapors and liquids in the vicinity of
this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the re department.
— Installation and service must be per-
formed by a qualied installer, service
agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
HOT GLASS
DO NOT TOUCH
NEVER
WILL
CAUSE BURNS.
GLASS
UNTIL COOLED.
ALLOW CHILDREN
TO TOUCH GLASS.
WARNING
A barrier designed to reduce the risk of burns from the
hot viewing glass is provided with this appliance and shall
be installed for the protection of children and other at-risk
individuals.

31793-3-1015Page 2
TABLE OF CONTENTS
Important Safety Information ............................................................................................................ 3
Safety Information for Users of LP-Gas............................................................................................ 4
Requirements for Massachusetts..................................................................................................... 5
Introduction.......................................................................................................................................6
Specications and Accessories ........................................................................................................ 7
Installation and General Safety Information ..................................................................................... 8
Gas Supply.......................................................................................................................................9
Vent Clearances ............................................................................................................................. 10
Venting Requirements ............................................................................................................... 11-12
PVVK-SH636 Vent Kit .................................................................................................................... 13
Vent Examples for Single Flue ..................................................................................................14-15
PVCA Horizontal Colinear Direct Vent Adapter .............................................................................. 16
Direct Vent and Colinear Vent Examples...................................................................................17-18
Rough Framing Dimensions........................................................................................................... 19
Clearance to Combustibles ............................................................................................................ 20
Specications ............................................................................................................................21-22
Gas Connection Installation............................................................................................................23
Lighting Instructions........................................................................................................................24
Wiring .............................................................................................................................................25
Start Up Check List.........................................................................................................................25
Start Up and Adjustments..........................................................................................................26-27
Remote Instructions...................................................................................................................28-34
Troubleshooting.............................................................................................................................. 35
Automatic Humidier Operation...................................................................................................... 36
Maintenance and Service..........................................................................................................36-37
Decorative Glass and Rock Media Accessory Installation.........................................................38-39
Parts List.........................................................................................................................................40
Parts View ......................................................................................................................................41
Master Parts Distributor List ........................................................................................................... 42
How To Order Repair Parts ............................................................................................................ 42
Warranty Terms ..............................................................................................................................43
SECTION PAGE

31793-3-1015 Page 3
IMPORTANT SAFETY INFORMATION
THIS IS A HEATING APPLIANCE
• Due to high temperatures the appliance should be locat-
ed out of trafc and away from furniture and draperies.
• Children and adults should be alerted to the hazards
of high surface temperatures and should stay away to
avoid burns or clothing ignition.
• Young children should be carefully supervised when
they are in the same room as the appliance. Toddlers,
young children and others may be susceptible to acci-
dental contact burns. A physical barrier is recommend-
ed if there are at risk individuals in the house. To re-
strict access to a replace or stove, install an adjustable
safety gate to keep away toddlers, young children and
other at risk individuals out of the room and away from
hot surfaces.
• Clothing or other ammable material should not be
placed on or near the appliance.
• Any safety screen or guard removed for servicing an ap-
pliance, must be replaced prior to operating the appli-
ance.
• Keep burner and control compartment clean.
• For manufactured home (USA only) or mobile home or
residential installation convertible for use with natu-
ral gas and liqueed petroleum gases when provision
is made for the simple conversion from one gas to the
other.
• Young children should be carefully supervised when
they are in the same room as the appliance. Toddlers,
young children, and others may be susceptible to ac-
cidental contact burns. A physical barrier is recom-
mended if there are at-risk individuals in the house. To
restrict access to a replace or stove, install an adjust-
able safety gate to keep toddlers young children, and
other at-risk individuals out of the room and away from
hot surfaces.
• A barrier designed to reduce the risk of burns from the
hot viewing glass is provided with this appliance and
shall be installed for the protection of children and other
at-risk individuals.
• If the barrier becomes damaged, the barrier shall be
replaced with the manufacturer’s barrier for this appli-
ance.
• Any safety screen, guard, or barrier removed for servic-
ing an appliance must be replaced prior to operating the
appliance.
• DO NOT put anything around the replace that will ob-
struct the ow of combustion and ventilation air.
• DO keep the appliance area clear and free from combus-
tible material, gasoline and other ammable vapors and
liquids.
• Do examine venting system periodically and replace
damaged parts.
• Do make a periodic visual check of burner. Clean and
replace damaged parts.
• DO NOT use this replace if any part has been under
water. Immediately call a qualied service technician to
inspect the replace and to replace any part of the con-
trol system and any gas control which has been under
water.
• DO NOT operate this appliance without the front panel
installed.
Note to the Installer
1. The installer must leave instruction manual with owner after
installation.
2. The installer must have the owner ll out and mail registra-
tion card supplied with the replace.
3. The installer should show the owner how to start and operate
replace and thermostat.
4. The installer must locate replace near a grounded wall re-
ceptacle for 115VAC power and must provide gas supply and
vent the replace properly for safe operation.
Safety markings are frequently used in this manual to designate a degree or level of
seriousness and should not be ignored.
WARNING indicates a potentially hazardous situation that if not avoided, could re-
sult in personal injury or death.
CAUTION indicates a potentially hazardous situation that if not avoided, may result
in minor or moderate injury or property damage.
WARNING
This appliance must be installed and repaired by a quali-
ed service person who is familiar with the proper installa-
tion and operation of the Mantis Power-Vent High Efciency
Fireplace. Installers who are not familiar with the installa-
tion of the Mantis and have questions, should contact Em-
pire Comfort Systems, Inc. prior to installing the appliance
to avoid creating a hazardous operating condition.
WARNING
Installation and repair should be done by a QUALIFIED
SERVICE PERSON. The appliance should be inspected be-
fore use and at least annually by a qualied service person.
More frequent cleaning may be required due to excessive
lint from carpeting, bedding materials, etc. It is imperative
that control compartments, burners and circulating air pas-
sageways of the appliance be kept clean.

31793-3-1015Page 4
SAFETY INFORMATION FOR USERS OF LP-GAS
LP-Gas (Propane) is a ammable gas which can cause res and
explosions. In its natural state, propane is odorless and colorless.
You may not know all the following safety precautions which can
protect both you and your family from an accident. Read them
carefully now, then review them point by point with the members
of your household. Someday, there may not be a minute to lose,
everyone’s safety will depend on knowing exactly what to do. If,
after reading the following information, you feel you still need
more information, please contact your gas supplier.
LP-GAS WARNING ODOR
If a gas leak happens, you should be able to smell the gas because of the odorant put in the LP-Gas.
That’s your signal to go into immediate action!
• Do not operate electric switches, light matches, use your
phone. Do not do anything that could ignite the gas.
• Get everyone out of the building, vehicle, trailer, or area. Do
that IMMEDIATELY.
• Close all gas tank or cylinder supply valves.
• LP-Gas is heavier than air and may settle in low areas such
as basements. When you have reason to suspect a gas leak,
keep out of basements and other low areas. Stay out until
reghters declare them to be safe.
• Use your neighbor’s phone and call a trained LP-Gas service
person and the re department. Even though you may not
continue to smell gas, do not turn on the gas again. Do not
re-enter the building, vehicle, trailer, or area.
• Finally, let the service man and reghters check for escaped
gas. Have them air out the area before you return. Properly
trained LP-Gas service people should repair the leak, then
check and relight the gas appliance for you.
NO ODOR DETECTED - ODOR FADE
Some people cannot smell well. Some people cannot smell the
odor of the chemical put into the gas. You must nd out if you
can smell the odorant in propane. Smoking can decrease your
ability to smell. Being around an odor for a time can affect your
sensitivity or ability to detect that odor. Sometimes other odors in
the area mask the gas odor. People may not smell the gas odor
or their minds are on something else. Thinking about smelling a
gas odor can make it easier to smell.
The odorant in LP-gas is colorless, and it can fade under some
circumstances. For example, if there is an underground leak, the
movement of the gas through soil can lter the odorant. Odorants
in LP-Gas also are subject to oxidation. This fading can occur if
there is rust inside the storage tank or in iron gas pipes.
The odorant in escaped gas can adsorb or absorb onto or into
walls, masonry and other materials and fabrics in a room. That
will take some of the odorant out of the gas, reducing its odor
intensity.
LP-Gas may stratify in a closed area, and the odor intensity
could vary at different levels. Since it is heavier than air, there
may be more odor at lower levels. Always be sensitive to the
slightest gas odor. If you detect any odor, treat it as a serious leak.
Immediately go into action as instructed earlier.
SOME POINTS TO REMEMBER
• Learn to recognize the odor of LP-gas. Your local LP-Gas
Dealer can give you a “Scratch and Sniff” pamphlet. Use it
to nd out what the propane odor smells like. If you suspect
that your LP-Gas has a weak or abnormal odor, call your
LP-Gas Dealer.
• If you are not qualied, do not light pilot lights, perform
service, or make adjustments to appliances on the LP-Gas
system. If you are qualied, consciously think about the odor
of LP-Gas prior to and while lighting pilot lights or performing
service or making adjustments.
• Sometimes a basement or a closed-up house has a musty
smell that can cover up the LP-Gas odor. Do not try to light
pilot lights, perform service, or make adjustments in an area
where the conditions are such that you may not detect the
odor if there has been a leak of LP-Gas.
• Odor fade, due to oxidation by rust or adsorption on walls
of new cylinders and tanks, is possible. Therefore, people
should be particularly alert and careful when new tanks or
cylinders are placed in service. Odor fade can occur in new
tanks, or reinstalled old tanks, if they are lled and allowed
to set too long before relling. Cylinders and tanks which
have been out of service for a time may develop internal
rust which will cause odor fade. If such conditions are sus-
pected to exist, a periodic sniff test of the gas is advisable. If
you have any question about the gas odor, call your LP-gas
dealer. A periodic sniff test of the LP-gas is a good safety
measure under any condition.
• If, at any time, you do not smell the LP-Gas odorant and
you think you should, assume you have a leak. Then take
the same immediate action recommended above for the
occasion when you do detect the odorized LP-Gas.
• If you experience a complete “gas out,” (the container
is under no vapor pressure), turn the tank valve off
immediately. If the container valve is left on, the container
may draw in some air through openings such as pilot light
orices. If this occurs, some new internal rusting could
occur. If the valve is left open, then treat the container as
a new tank. Always be sure your container is under vapor
pressure by turning it off at the container before it goes
completely empty or having it relled before it is
completely empty.

31793-3-1015 Page 5
REQUIREMENTS FOR MASSACHUSETTS
For all side wall horizontally vented gas fueled equipment installed
in every dwelling, building or structure used in whole or in part for
residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination
is less than seven feet above nished grade in the area of the
venting, including but not limited to decks and porches, the
following requirements shall be satised:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS.
At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gastter shall
observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the oor level where
the gas equipment is to be installed. In addition, the installing
plumber or gastter shall observe that a battery operated
or hard wired carbon monoxide detector with an alarm is
installed on each additional level of the dwelling, building or
structure served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property owner
to secure the services of qualied licensed professionals for
the installation of hard wired carbon monoxide detectors
a. In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and
battery back-up may be installed on the next adjacent
oor level.
b. In the event that the requirements of this subdivision
can not be met at the time of completion of installation,
the owner shall have a period of thirty days to comply
with the above requirements; provided, however, that
during said thirty day period, a battery operated carbon
monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each
carbon monoxide detector as required in accordance with the
above provisions shall comply with NFPA 720 and be ANSI/
UL 2034 listed and IAS certied.
3. SIGNAGE. A metal or plastic identication plate shall be
permanently mounted to the exterior of the building at a
minimum height of eight feet above grade directly in line
with the exhaust vent terminal for the horizontally vented
gas fueled heating appliance or equipment. The sign shall
read, in print size no less than one-half (1/2) inch in size,
“GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL
OBSTRUCTIONS”.
4. INSPECTION. The state or local gas inspector of the side
wall horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the inspector
observes carbon monoxide detectors and signage installed
in accordance with the provisions of 248 CMR 5.08(2)(a) 1
through 4.
(b) EXEMPTIONS: The following equipment is exempt from
248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled
“Equipment Not Required To Be Vented” in the most
current edition of NFPA 54 as adopted by the Board;
and
2. Product Approved side wall horizontally vented gas
fueled equipment installed in a room or structure
separate from the dwelling, building or structure
used in whole or in part for residential purposes.
(d) MANUFACTURER REQUIREMENTS - GAS
EQUIPMENT VENTING SYSTEM NOT PROVIDED.
When the manufacturer of a Product Approved side
wall horizontally vented gas fueled equipment does not
provide the parts for venting the ue gases, but identies
“special venting systems”, the following requirements
shall be satised by the manufacturer:
1. The referenced “special venting system” instructions
shall be included with the appliance or equipment
installation instructions; and
2. The “special venting systems” shall be Product
Approved by the Board, and the instructions for
that system shall include a parts list and detailed
installation instruction.
(e) A copy of all installation instructions for all Product
Approved side wall horizontally vented gas fueled
equipment, all venting instructions, all parts lists for
venting instructions, and/or all venting design instructions
shall remain with the appliance or equipment at the
completion of the installation.
State of Massachusetts: The installation must be made
by a licensed plumber or gas tter in the Commonwealth of
Massachusetts.

31793-3-1015Page 6
INTRODUCTION
WARNING
The safety information listed below must be followed
during the installation, service, and operation of this
product. Failure to following the safety recommendations
could result in possible damage to the equipment, serious
personal injury, or death.
Additional code information listed below is for reference
purposes only and does not necessarily have jurisdiction
over local or state codes. Always consult with local authori-
ties before installing any gas appliance.
Combustion and Ventilation Air
CANADA: National Standard of Canada for Natural Gas and
Propane Installation Codes (NSCNGPIC)
CAN/CGA-B149.1 and .2, Part 7, Venting Systems and Air
Supply for Appliances
U.S.: National Fuel Gas Code NFPA 54/ANSI Z223.1(NFGC), Air
for Combustion and Ventilation.
Attention: This appliance may be installed in the U.S. or in
Canada.
Electrical Connections
CANADA: Canadian Electrical Code CSA C22.1
U.S.: National Electrical Code (NEC) ANSI/NFPA 70
Gas Piping and Gas Pipe Pressure Testing
CANADA: NSCNGPIC Part 5
U.S.: NFGC and National Plumbing Codes
General Installations
CANADA: NSCNGPIC. For a copy, contact Standard Sales, CSA
International, 178 Rexdale Blvd., Etobicoke (Toronto), Ontario,
M9W 1R3 Canada
U.S.: Current edition of the NFGC and NFPA 90B. For copies
contact the National Fire Protection Association Inc.,
Batterymarch Park, Quincy, MA 02269 or American Gas
Association, 400 N. Capitol, N.W., Washington DC 20001 or www.
NFPA.org.
Safety
CANADA: (NSCNGPIC) CAN/GCA-B149.1 and .2 National Stan-
dard of Canada
U.S.: NFGC NFPA 5/ANSI Z223.1

31793-3-1015 Page 7
SPECIFICATIONS & ACCESSORIES
SPECIFICATIONS
Models FG28BMK(N,P)
Maximum Input BTU/HR (KW/H) 20,000 (5.86)
Minimum Input BTU/HR (KW/H) 10,000 (2.93)
Height 24-9/16”
Width 28”
Depth 17-3/16”
Gas Inlet (Pipe) 3/8” Flair
Electrical - The replace comes equipped with a ve foot (1.5 m) 3 pronged cord, for connection to an approved 115 VAC, 60 Hz, 5A
(maximum) wall receptacle.
Vent Pipe: - 1-1/2 inch diameter S636 pipe, 40 feet maximum equivalent length with three 90° elbows.
ACCESSORIES
Venting
Part Number Description
PVVK-SH636 Single Flue Horizontal Vent Kit
Surrounds with Barriers
Part Number Description
FWKQ28BL In-Wall Surround Kit, Picture Frame with
Barrier
FHKQ28BL In-Wall Surround Kit, Louverless with Barrier
FIKQ28BL 38” Wide X 30-7/8” Tall Insert Surround Kit
with Barrier
FFKQ28BL 35” Wide X 29-3/8” Tall Fireplace Mantel Sur-
round Kit with Barrier
Decorative Glass Kits (One kit per one square foot)
Part Number Description
DG1BKP Decorative Glass, Black Polished
DG1BUC Decorative Glass, Blue Clear
DG1CLF Decorative Glass, Clear Frosted
DG1AB Decorative Glass Droplets -
1/2” Aqua Blue
DG1GC Decorative Glass Droplets -
1/2” Glacier Ice
DG1SL Decorative Glass Droplets -
1/2” Sangria Luster
DG1NXS Decorative Glass Droplets -
1” Onyx Solid
DG1RYC Decorative Glass Droplets -
1” Ruby Clear
DG1TZ Decorative Glass Droplets -
1” Topaz Clear
Decorative Rock Kits
Part Number Description
DRFPA Decorative Rock - Small (One kit per 1/2
square foot)
Note: The total burner cover area is two square feet.
Note: Never place media material on or next to the burner. See
pages 38-39.
Note: A barrier is required for operation of the appliance,

31793-3-1015Page 8
INSTALLATION AND GENERAL SAFETY INFORMATION
General Information
This series is designed certied in accordance with American Na-
tional Standard/CSA Standard Z21.88 and CSA America Interim
Requirement 109-2009 as a Gas Fireplace Heater to be installed
according to these instructions.
Any alteration of the original design, installed other than as
shown in these instructions will be the responsibility of the
person and company making the changes, and will void the
warranty. This product may not be used with any type of gas
other than what is shown on the rating plate.
Important
All Correspondence should refer to complete Model Number, Se-
rial Number and type of gas.
Installation
Installation, replacement, gas piping, gas utilization equipment
or accessories, and the repair and service of this equipment
must be performed by a qualied agency. The term “qualied
agency” means any individual, rm, corporation or company
which either in person or through a representative is engaged
in and is responsible for (a) the installation or replacement
of gas piping or (b) the connection, installation, repair or
servicing of equipment, who is experienced in such work,
familiar with all precautions required and has complied with all the
requirements of the authority having jurisdiction.
• This installation must conform with local codes, or in the
absence of local codes, in Canada use Canadian Electrical
Code CSA C22.1 and in the United States use the National
Fuel Gas Code NFPA 54/ANSI Z223.1.
• This appliance, when installed, must be electrically grounded
in accordance with local codes or. In the absence of local
codes, in Canada with the Canadian Electrical Code CSA
C22.1 and in the United States with the National Electrical
Code ANSI/NFPA 70.
• Provide adequate clearances around the heater for servicing
and ensure there are no obstructions to the combustion air
intake situated at the back of the heater. Refer to Pages 19 to
21.
• The Mantis Power-Vent High-Efciency Fireplace must be in-
stalled on a at, solid continuous surface (i.e. wood, metal,
concrete). Rough or uneven surfaces can cause vibration or
humming in the heater.
• This appliance does need to be installed in such a way where
the heater can be removed for servicing the heat exchanger
and the ue that are located in the rear section of the heater.
• This appliance is equipped with a three-prong [ground-
ing] plug for your protection against shock hazard and
should be plugged directly into a properly grounded
three-prong receptacle. Do not cut or remove the ground-
ing prong from this plug. For an ungrounded receptacle,
purchase an adapter with two prongs and a wire for ground-
ing.
Note: Under no circumstances should the appliance be in-
stalled under conditions that would not allow for easy re-
moval of the appliance to carry out routine inspection and
service to the appliance.
Note: Where a mantel surround is being used on insert installa-
tions and zero clearance replace installations, the com-
bustion air intake slot located in the top mantel surround
must not be obstructed. This will allow combustion air to
enter through the slot to the combustion air inlet located
at the back of the heater.
Note: During initial ring of this unit, residual oil from the heat
exchanger may bake off and smoke may occur. Provide
adequate ventilation to the area where the heater is in-
stalled to prevent triggering of smoke alarms. Refer to
page 27 for more detail.
A manufactured home (USA only) or mobile home OEM installa-
tion must conform with the Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280, or when such a stan-
dard is not applicable, the Standard for Manufactured Home In-
stallations, ANSI/NCSBCS Z225.1, or Standard for Gas Equipped
Recreational Vehicles and Mobile Housing, CSA Z240.0.
Installation on Combustible Flooring
If this appliance is to be installed directly on carpeting, tile, or other
combustible material, other than wood ooring, the appliance shall
be installed on a metal or wood panel extending the full width and
depth of the appliance.
The base referred to above does not mean the re-proof base as
used on wood stoves. The protection is primarily for rugs that may
be extremely thick and light-color tile that can discolor.
Installation in Residential Garages
Gas utilization equipment in residential garages shall be installed
so that all burners and burner ignition devices are located not less
than 18 inches (457 mm) above the oor. The equipment shall be
located, or protected, so it is not subject to physical damage by
vehicles.
Operation of Heater During Construction
The heater shall not be used during construction.
WARNING
Do not operate appliance with the glass front removed, or if
it is cracked or broken. Replacement of the glass shall be
performed by a licensed or qualied service person

31793-3-1015 Page 9
GAS SUPPLY
All gas piping must be installed in compliance with local codes
and utility regulations. In the absence of local codes the installa-
tion must comply with NFCG NFPA 54/ANSI Z223.1. CAN/CGA
- B149(.1 or .2) installation code.
Note: Never use plastic pipe. Check to conrm whether your local
codes allow copper tubing or galvanized.
Where permitted exible gas connectors must be certied to the
following standards:
— ANS Z21.24 Appliance Connectors of Corrugated Metal Tub-
ing and Fittings
— ANS Z21.45 Assembled Flexible Appliance Connectors of
Other Than All-Metal Construction
The above connectors may be used if acceptable by the author-
ity having jurisdiction. The state of Massachusetts requires that a
exible appliance connector cannot exceed three feet in length.
A drip leg should be installed in the vertical gas supply pipe run to
the unit.
Manual Shut-off Valve
Some local regulations require the installation of a manual shut-off
valve and ground joint union external to the appliance. The shutoff
should be accessible for service and/or emergency use. Consult
the local utility or gas supplier for additional requirements regard-
ing the placement of the manual shut off valve. Compounds used
on threaded joints of gas piping shall be resistant to the action of
liqueed petroleum gases.
Leak Testing
WARNING - FIRE OR EXPLOSION HAZARD
Never test for leaks with an open ame. Check all connec-
tions using a commercially available soap solution. A re or
explosion may result causing property damage, personal
injury or loss of life. Failure to follow the safety warnings
exactly could result in serious injury, death or property
damage.
After gas piping to the heater is complete, all connections must be
tested for gas leaks. This includes pipe connections at the main
gas valve, emergency shutoff valve and exible gas connectors
(if applicable). The soap and water solution can be applied on
each joint or union using a small paintbrush. If any bubbling is
observed, the connection is not sealed adequately and must be
retightened. Repeat the tightening and soap check process until
the bubbling ceases.
Important Note:
When pressure testing the gas supply lines at pressures
greater than ½ psig (14 in. w.c.), the gas supply piping system
must be disconnected from the appliance to prevent damage
to the gas control valve. If the test pressure is less than or
equal to ½ psig (14 in. w.c.), close the manual shut-off valve.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8 inch N.P.T.
plugged tapping, accessible for test gauge connection, must
be placed immediately upstream of the gas supply connection
to the appliance.
2. The appliance and its individual shutoff valve must be dis-
connected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psig.
3. The appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig.
Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
In Inches
Tubing, Type L
Outside Diameter
In Inches
Nat. L.P. Nat. L.P.
0-10 feet 1/2 3/8 1/2 3/8
10-40 feet 1/2 1/2 5/8 1/2
40-100 feet 1/2 1/2 3/4 1/2
100-150 feet 3/4 1/2 7/8 3/4

31793-3-1015Page 10
Figure 1
VENT CLEARANCES
US Installation 1
A = Clearance above any grade,
veranda, porch or balcony
12 in (30 cm)
B = Clearance to window or door
that may be opened
6 in (15 cm) for appliances ≤
10,000 Btu/h (3 kW), 9 in (23
cm) for appliances > 10,000
Btu/h (3 kW) and ≤ 50,000
Btu/h (15 kW), 12 in (30 cm)
for appliances > 50,000 Btu/h
(15 kW)
C = Clearance to permanently
closed windows
0
D = Vertical clearance to venti-
lated soft located above the
terminal within a horizontal
distance of 2 ft (61 mm) from
the center line of the terminal
18 in (46 cm)
E = Clearance to unventilated
soft
18 in (46 cm)
F = Clearance of outside corner 12 in (30 cm)
G = Clearance of inside corner 21 in (30 cm)
H = Clearance to each side of
center line extended above
meter/regulator assembly
3 ft (91 cm) within a height 15
ft (4.5 m) above the meter/
regulatory assembly
I = Clearance to service regulator
vent outlet
3 ft (91 cm)
J = Clearance to non-mechanical
air supply inlet to building or
the combustion air inlet to any
other appliance
6 in (15 cm) for appliances ≤
10,000 Btu/h (3 kW), 9 in (23
cm) for appliances > 10,000
Btu/h (3 kW) and ≤ 50,000
Btu/h (15 kW), 12 in (30 cm)
for appliances > 50,000 Btu/h
(15 kW)
K = Clearance to a mechanical air
supply inlet
3 ft (91 cm) above if within 10
ft (3 m) horizontally
L = Clearance above paved
sidewalk or paved driveway
located on public property †
Not applicable
M = Clearance under veranda,
porch deck, or balcony ¥
18 in (46 cm)
1In accordance with the current ANSI Z223.1/NFPA 54, National
Fuel Gas Code
†A vent shall not terminate directly above a sidewalk or paved
driveway that is located between two single family dwellings
and serves both dwellings.
¥ Permitted only if veranda, porch, deck or balcony is fully open
on a minimum of two sides beneath the oor.
*For clearances not specied in ANSI Z223.1/NFPA 54 or CSA
B149.1, refer to local codes.