Empire Comfort Systems Mantis FF28BMN-1 Quick start guide

Page 1
INSTALLATION INSTRUCTIONS
AND
OWNER’S MANUAL
POWER-VENT
HIGH-EFFICIENCY FIREPLACE
MODELS
FF28BM(N,P)-1
FI28BM(N,P)-1
FW28BM(N,P)-1
WARNING: If not installed, operated and main-
tained in accordance with the manufacturer’s
instructions, this product could expose you to
substances in fuel or from fuel combustion which
can cause death or serious illness.
Installer: Leave this manual with the
appliance.
Consumer: Retain this manual for future
reference.
— Donotstoreorusegasolineorotheramma-
ble 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.
 • Immediately call your gas supplier from
a neighbor’s phone. Follow the gas sup-
plier’s instructions.
 • Ifyoucannotreachyourgassupplier,call
theredepartment.
— Installation and service must be performed
byaqualiedinstaller,serviceagencyorthe
gas supplier.
WARNING: If the information in these
instructionsarenotfollowedexactly,areor
explosion may result causing property damage,
personal injury or loss of life.
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.
™
EMPIRE
EMPIRE
Comfor t Systems
ATTENTION: THIS APPLIANCE IS NOT TO
BE INSTALLED IN CANADA.
WARNING
HOT GLASS
DO NOT TOUCH
NEVER
WILL
CAUSE BURNS.
GLASS
UNTIL COOLED.
ALLOW CHILDREN
TO TOUCH GLASS.

25700-1-0809Page 2
TABLE OF CONTENTS
Important Safety Information .......................................................................................................................................... 3
Safety Information for Users of LP-Gas .......................................................................................................................... 4
Requirements for Massachusetts ...................................................................................................................................... 5
Gas Supply ....................................................................................................................................................................... 6
Introduction ...................................................................................................................................................................... 7
Installation Instructions – General Safety Information .................................................................................................... 8
Specications ................................................................................................................................................................... 8
Clearances for Direct Vent ............................................................................................................................................... 9
Heater Installation for Direct Vent ................................................................................................................................... 9
Clearances for Single Flue ............................................................................................................................................. 10
Heater Installation for Single Flue ................................................................................................................................. 10
Specications .......................................................................................................................................................... 11 - 13
Clearance to Combustibles ............................................................................................................................................ 14
Rough Framing Dimensions .......................................................................................................................................... 15
Insert Into Masonry Fireplace ........................................................................................................................................ 15
Wall Clearances .............................................................................................................................................................. 16
Log Set Installation Instructions ............................................................................................................................. 17 - 18
Vent Examples for Single Flue ............................................................................................................................... 19 - 21
PVVK-CFA Flex Vent Kit .............................................................................................................................................. 22
PVVK-SH Horizontal Vent Adaptor Kit ........................................................................................................................ 23
Horizontal Examples for Colinear Direct Vent .............................................................................................................. 24
Vertical Examples for Colinear Direct Vent ............................................................................................................ 25 - 27
PVCA Horizontal Colinear Direct Vent Adaptor ........................................................................................................... 28
PVVTC Termination Cap Vent Kit ................................................................................................................................ 29
PVCT Colinear Transition Vent Kit ............................................................................................................................... 30
Direct Vent Installation Instructions .............................................................................................................................. 31
PVVK-24H and PVVK-48H Vent Kit .................................................................................................................... 32 - 33
Gas Connection Installation Instructions ....................................................................................................................... 34
F(F,I,W)K28(BL,CM,HP,SS) Surround Installation Instructions................................................................................... 35
Operating Instructions Checklist .................................................................................................................................... 36
Lighting Instructions ............................................................................................................................................... 37 - 38
Fan Operation ................................................................................................................................................................. 39
Automatic Humidier Operation ................................................................................................................................... 40
Optional Controllers................................................................................................................................................. 41 - 42
Wiring ............................................................................................................................................................................ 43
General Information ....................................................................................................................................................... 44
Maintenance ............................................................................................................................................................ 45 - 47
Main Convection Fan ..................................................................................................................................................... 48
Heat Exchanger .............................................................................................................................................................. 48
Unit Operating Faults ..................................................................................................................................................... 48
Resetting the Heater ....................................................................................................................................................... 49
Log Replacement ........................................................................................................................................................... 49
Parts List ........................................................................................................................................................................ 50
Parts View ...................................................................................................................................................................... 51
Warranty Terms .............................................................................................................................................................. 52
Master Parts Distributor List........................................................................................................................................... 53
How To Order Repair Parts ............................................................................................................................................ 53
Service Notes ........................................................................................................................................................... 54 - 55
SECTION PAGE

25700-1-0809 Page 3
IMPORTANT SAFETY INFORMATION
THIS IS A HEATING APPLIANCE
DO NOT OPERATE THIS APPLIANCE WITHOUT FRONT PANEL INSTALLED.
• Due to high temperatures the appliance should be
located 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 restrict
accesstoareplaceorstove,installanadjustale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
appliance must be replaced prior to operating the
appliance.
• Keepburnerandcontrolcompartmentclean.
• Ventcaphotwhilefurnaceisinoperation.
• For manufactured home (USA only) or mobile home
or residential installation convertible for use with
natural gas and liqueed petroleum gases when
provision is made for the simple conversion from one
gas to the other.
• Installation and repair should be done by a
QUALIFIED SERVICE PERSON. The appliance
should be inspected before 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 passageways
of the appliance be kept clean.
• DO NOT put anything around the furnace that will
obstructtheowofcombustionandventilationair.
• DO keep the appliance area clear and free from
combustible 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 heater if any part has been under
water. Immediately call a qualied service technician
to inspect the heater and to replace any part of the
control system and any gas control which has been
under water.

25700-1-0809Page 4
SAFETY INFORMATION FOR USERS OF LP-GAS
Propane (LP-Gas) 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 mem-
bers 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 ser-
vice, or make adjustments to appliances on the LP-Gas sys-
tem. 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 oc-
casion when you do detect the odorized LP-Gas.
• If you experience a complete “gas out,” (the container is un-
der 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.

25700-1-0809 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 (7) 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 OFCARBONMONOXIDEDETECTORS.
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 (30) days to comply
with the above requirements; provided, however, that
during said thirty (30) 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 (8) 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.

25700-1-0809Page 6
Consult the current National Fuel Gas Code, ANSI Z223.1 CAN/
CGA-B149 (.1 or .2) installation code.
Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
Tubing, Type L
Outside Diameter
Nat. L.P. Nat. L.P.
0-10 feet
0-3 meters
1/2”
12.7mm
3/8”
9.5 mm
1/2”
12.7mm
3/8”
9.5 mm
10-40 feet
4-12 meters
1/2”
12.7mm
1/2”
12.7mm
5/8”
15.9 mm
1/2”
12.7mm
40-100 feet
13-30 meters
1/2”
12.7mm
1/2”
12.7mm
3/4”
19mm
1/2”
12.7mm
100-150 feet
31-46 meters
3/4”
19mm
1/2”
12.7mm
7/8”
22.2 mm
3/4”
19mm
Note: Never use plastic pipe. Check to conrm whether your local
codes allow copper tubing or galvanized.
Note: Since some municipalities have additional local codes, it is
always best to consult your local authority and installation code.
The use of the following gas connectors is recommended:
— ANSZ21.24Appliance Connectorsof CorrugatedMetalTubing
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 authority
having jurisdiction. The state of Massachusetts requires that a exible
appliance connector cannot exceed three feet in length.
Figure 1
Installing a New Main Gas Cock
Each appliance should have its own manual gas cock.
A manual main gas cock should be located in the vicinity of
the unit. Where none exists, or where its size or location is not
adequate, contact your local authorized installer for installation
or relocation.
Compounds used on threaded joints of gas piping shall be resistant
to the action of liqueed petroleum gases. The gas lines must be
checked for leaks by the installer. This should be done with a soap
solution watching for bubbles on all exposed connections, and if
unexposed, a pressure test should be made.
Neveruseanexposedametocheckforleaks.Appliancemust
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test. Never pressure test with
applianceconnected;controlvalvewillsustaindamage!
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required
by the National Fuel Gas Code that a drip line be installed near
the gas inlet. This should consist of a vertical length of pipe tee
connected into the gas line that is capped on the bottom in which
condensation and foreign particles may collect.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8" (3 mm) 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
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
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 (3.5 kPa).
Attention! If one of the procedures results in pressures in excess
of1/2psig(14"w.c.)(3.5kPa)onthereplacegasvalve,itwill
resultinahazardouscondition.
Checking Manifold Pressure
Both Propane and Natural gas valves have a built-in pressure
regulator in the gas valve. Natural gas models will have a manifold
pressure of approximately 3.5" w.c. (.872 kPa) at the valve outlet
with the inlet pressure to the valve from a minimum of 5.0" w.c.
(1.245 kPa) for the purpose of input adjustment to a maximum of
10.5" w.c. (2.614 kPa) Propane gas models will have a manifold
pressure approximately 7.0" w.c. (2.49 kPa) at the valve outlet
with the inlet pressure to the valve from a minimum of 11.0" w.c.
(2.739 kPa) for the purpose of input adjustment to a maximum of
13.0" w.c. (3.237 kPa).
A 1/8" (3 mm) N.P.T. plugged tapping, accessible for test gauge
connection, is located on the outlet side of the gas control.
GAS SUPPLY
3/8 NPT NIPPLE
GAS VALVE
SHUT OFF VALVESOLENOID

25700-1-0809 Page 7
QualiedInstallingAgency
Installation and replacement of gas piping, gas utilization
equipment or accessories and repair and servicing of equipment
shall be performed only by a qualied agency. The term “quali-
ed agency” mean 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.
The installation must conform with local codes, or in the absence
of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA
54 or Natural Gas and Propane Installation Code, CSA B149.1.
* Available from the American National Standards Institute, Inc.,
11 West 42nd St., New York, NY 10036.
A manufactured home (USA only) or mobile home OEM
installation must conform with the Manufactured Home Con-
struction and Safety Standard, Title 24 CFR, Part 3280, or, when
such a standard is not applicable, the Standard for Manufactured
Home Installations, ANSIZ225.1, or Standard for Gas Equipped
Recreational Vehicles and Mobile Housing, CSA Z240.0.
High Altitudes
For altitudes/elevations above 2,000 feet (610 m), input ratings
should be reduced at the rate of 4 percent for each 1,000 feet
(305 m) above sea level, this may be accomplished by reducing
manifold pressure. The maximum allowable reduction in manifold
pressure for Natural gas shall be from 3.5” w.c. (.872 kPa) to 2.8”
w.c. (.697 kPa). The maximum allowable reduction in manifold
pressure for Propane (LP) gas shall be from 10.0” w.c. (2.49 kPa)
to 8.0” w.c. (1.99 kPa). For Canadian high altitude applications,
this appliance is suitable for installation at elevations between 0
feet (0 m) and 4,500 feet (1,372 m) without change.
ATTENTION:
THIS APPLIANCE IS NOT TO BE INSTALLED IN
CANADA.
Introduction
Always consult your local Building Department regarding
regulations, codes or ordinances which apply to the installation of
a direct vent wall furnace.
Instructions to Installer
1. Installer must leave instruction manual with owner after
installation.
2. Installer must have owner ll out and mail warranty card
supplied with furnace.
3. Installer should show owner how to start and operate furnace
and thermostat.
4. Installer must locate unit near a grounded wall receptacle for
115VAC power and must provide gas supply and vent the
unit properly for safe operation.
General Information
This series is designed certied in accordance with American
National Standard/CSA Standard Z21.88 and CSA 2.33 by the
Canadian Standards Association 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 or use with a type of gas not shown
on the rating plate is the responsibility of the person and
company making the change.
Important
All Correspondence should refer to complete Model Number,
Serial Number and type of gas.
Notice: During initial ring of this unit, oil from the heat exchang-
er may bake out and smoke may occur. To prevent triggering of
smoke alarms, ventilate the room in which the unit is installed.
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” (457 mm) above the oor.
Such equipment shall be located, or protected, so it is not subject
to physical damage by a moving vehicle.
Warning:
Any change to this furnace or its control can be dangerous.
This is a heating appliance and any panel, door or guard
removed for servicing an appliance must be replaced prior
to operating the appliance.
Sate of Massachusetts: The installation must be made by a
licensed plumber or gas tter in the Commonwealth of Mas-
sachusetts.
INTRODUCTION

25700-1-0809Page 8
Model F(F,I,W)28BM(N,P)
Input BTU/HR (KW/H) 15,000 Rear - 13,000 Front
Height 24 3/4”
Width 28 3/16”
Depth 17 5/8”
Gas Inlet (Pipe) 3/8” Flair
Electrical - Unit has a 5’ (1.5 m) 3 pronged cordset for con-
nection to an approved 115 VAC 60 Hz maximum
AMPs - 5A wall receptacle.
Accessories
Part Number Description
TRW Wall Thermostat - Wireless Remote
FRBTC Battery Operated Remote with Thermostat
FRBTP Battery Operated Remote with Programmable
Thermostat
TDV1 24 Digital Wall Thermostat
T24V 24 Volt Thermostat
TMV2 Two-Stage Thermostats
PVVK24H Direct Vent 24” Vent Kit
PVVK48H Direct Vent 48” Vent Kit
PVVK-SH Single Flue Horizontal Vent Kit
PVVK-SV Single Flue Vertical Vent Kit
PVVK-CFA Flex Vent Kit
PVCT Colinear Transition
PVVTC Vertical Termination Cap - 1.5”
PVCA Colinear Adapter
SPECIFICATIONS
INSTALLATION INSTRUCTIONS - GENERAL SAFETY INFORMATION
1. This installation must conform with local codes or, in the
absence of local codes with NFPA54.
2. Provide adequate clearances around the product for
servicing and ensure there are no obstructions to the
combustion air intake situated at the back of the heater. Refer
to Page 14, Figures 6 through 10.
3. The appliance must be installed on a at, solid continuous
surface (i.e. wood, metal, concrete). Please Note: Rough
or uneven surfaces can cause vibration or humming in the
heater.
4. The Mantis Power-Vent High-Effeciency Fireplace can be
installed in a wide variety of ways and will t nearly any
room layout. It may be installed in a recessed position, framed
out into the room, or across a corner. For installation options
refer to page 14.
5. This appliance needs to be installed in such a way that the
heater can be removed at all times to service the heater ex-
changer and ue fan located in the rear section of the heater.
Note: Under no circumstances should the appliance be
installed under conditions which would not allow for
easy removal of the appliance to carry out routine
inspection and service to the appliance, to do so will
void the warranty.
Note: On Single Wall ue pipe installations (imitation
zero clearance replace) a minimum of 2” (50.8 cm)
clearance must be provided at the rear of the heater to
enable the heater to get sufcient combustion air to the
air inlet located at the rear of heater. Refer to installation
instructions on page 14, Figures 6 through 10.
Note: Where a mantel surround is being used on insert
installations and zero clearance replace installations,
the combustion air intake slot located in the top mantel
surround must have no obstructions to allow combustion
air to enter through the slot to the combustion air inlet
located at the back of the heater.

25700-1-0809 Page 9
1. Pick a location on a wall with a clear space in the room.
In selecting a location for installation, it is necessary to
provide adequate accessibility clearances for servicing and
proper installation. Be sure to locate the unit close enough to a
110 VAC wall receptacle to properly power appliance.
2. When facing the front of the furnace the minimum clearances
from casing to combustible construction are 0” (0 mm) on
top, 0” (0 mm) on each side, and 0” (0 mm) from the oor,
0” (0 mm) to rear wall and 44 3/4” (1136.7 mm) from Mantis
top to ceiling.
3. The minimum distance from the center of the vent cap to the
nearest outside corner or obstruction is 12” (305 mm).
4. The minimum wall depth is 4” (102 mm) and the maximum
is 48” (121.92 cm).
The vent terminal of a direct vent appliance, with an input of
50,000 BTU (14.6KW) per hour or less shall be located at least
9” (229 mm) from any opening through which ue gases could
enter a building.
The bottom of the exhaust vent terminal and the air intake shall
be located at least 12” (305 mm) above grade and must be vented
outside.
WARNING: The nearest point of the vent cap should be
aminimumhorizontaldistantofsix(6)feet(1.83m)from
any pressure regulator. In case of regulator malfunction,
thesix(6)feet(1.83m)distancewillreducethechanceof
gas entering the vent cap.
Installation on Rugs and Tile
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.
Locating Wall Opening
The recommended location for this furnace is on an outside wall.
Locate wall studs so that wall vent opening will be located between
wall studs. The wall opening required for venting is a 3 1/2”
(89 mm) minimum diameter opening.
Refer to Figures 3 to 5 for positioning the heater on wall and for
locating gas line connection and vent opening. Furnace can sit on
the oor.
CLEARANCES FOR DIRECT VENT
HEATER INSTALLATION FOR DIRECT VENT
1 9/16”
4 3/32”
Figure 2

25700-1-0809Page 10
1. Pick a location on a wall with a clear space in the room.
In selecting a location for installation, it is necessary to
provide adequate accessibility clearances for servicing and
proper installation. Be sure to locate the unit close enough to a
115 VAC wall receptacle to properly power appliance.
2. When facing the front of the furnace, the minimum clearances
from casing to combustible construction are 0” (0 mm) on
top, 0” (0 mm) on each side, 0” (0 mm) from the oor and
2” (51 mm) to rear wall for servicing and installation.
3. The minimum distance from the center of the vent cap to the
nearest outside corner or obstruction is 12” (305 mm).
The bottom of the exhaust vent terminal and the air intake shall
be located at least 12” (305 mm) above grade and must be vented
outside.
WARNING: The nearest point of the vent cap should be a
minimumhorizontaldistanceofsix(6)feet(1.83m)from
any pressure regulator. In case of regulator malfunction,
thesix(6)feet(1.83m)distancewillreducethechanceof
gas entering the vent cap.
Installation on Rugs and Tile
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.
Locating Wall Opening
The recommended location for this heater is on an outside wall
(the unit can be located on an inside wall but must not exceed 40’
(12.19 m) in exhaust vent length. Locate wall studs so that wall
vent opening will be located between wall studs. The wall opening
required for venting is a 1 7/8” (48 mm) minimum diameter
opening.
Refer to Figures 3 to 5 for positioning the heater on wall and for
locating gas line connection and vent opening. Heater can sit on
the oor.
CLEARANCES FOR SINGLE FLUE
HEATER INSTALLATION FOR SINGLE FLUE