Nordyne M3RL User Manual
Direct Vent (Sealed Combustion) Forced Air Gas Furnaces
Installation Instructions
M3RL Series 90+ Downflow Condensing Furnace
For installation in:
1. Manufactured Homes
2. Park Models and Manufactured Buildings
3. Modular Homes/Buildings
!
W ARNING:
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 flammable
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 fire
department.
– Installation and service must be performed by a
qualified installer, service agency, or the gas supplier.
BW Models
!
ADVERTISSEMENT:
RISQUE D’INCENDIE OU D’EXPLOSION
Le non-respect des avertissements de sécurité
pourrait entraîner des blessures graves, la
mort ou des dommages matériels.
– Ne pas entreposer ni utiliser de l’essence ni
d’autres vapeurs ou liquides inflammables dans le
voisinage de cet appareil, ni de tout autre appareil.
–QUE FAIRE S’IL Y A UNE ODEUR DE GAZ
• Ne pas tenter d’allumer aucun appareil.
•Ne toucher à aucun interrupteur électrique;
n’utiliser aucun téléphone dans le bâtiment.
• Évacuer l’immeuble immédiatement.
• Appeler immédiatement le fournisseur de gaz en
employant le téléphone d’un voisin. Respecter à
la lettre les instructions du fournisseur de gaz.
• Si personne ne répond, appeler le service des
incendies.
– L’installation et l’entretien doivent être effectués
par un installateur qualifié, un organisme de
service ou le fournisseur de gaz.
BWT Models
!
W ARNING:
Should overheating occur, or the
gas supply fail to shut off, shut
off the manual gas valve to the
appliance before shutting off the
electrical supply.
Improper installation, adjustment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.
2
TABLE OF CONTENTS
General ...................................................... 4
Unit Dimensions .................................. 4
Shipping Weights................................ 4
Furnace Specification ........................ 4
Air Flow Data ..................................... 4
Owner's Information ................................ 5
Installation Requirements...................... 6
Location.............................................. 7
Clearance ........................................... 7
Circulating Air Supply ............................ 7
Return Air Provisions .............................. 8
Air Distribution Systems ........................ 9
Duct Connector Selection.................... 10
Duct Installation .................................... 10
Venting and Combustion
Air Requirements ........................... 13
Venting Requirements .......................... 14
Vent Table ........................................ 1 5
Vent Pipe Material ............................ 16
Vent Pipe Length and Diameter....... 16
Vent Pipe Installation ........................ 16
Pipe Routing & Support .................... 16
Location of Outdoor Termination .....16
Horizontal Venting ............................ 18
Vertical Venting ................................18
Vent Freezing Protection .................19
Concentric Vent Termination ........... 19
Drainage of Condensate
From Furnace ................................ 19
Gas Supply and Piping ......................... 20
Leak Check....................................... 21
High Altitude Derate ......................... 21
Pressure Switch .............................. 21
Conversion .............................................. 21
Lighting and Adjustment
of the Appliance .............................. 23
Electrical Wiring ...................................... 24
Line Voltage Wiring ........................... 24
Low Voltage Wiring ........................... 26
Ventilation ................................................ 26
Start-up and Adjustment ........................ 26
Start-Up Procedure ........................... 26
Shut Down Procedure ....................... 27
Verifying and Adjusting Firing Rate ... 27
Temperature Rise ............................. 27
Verifying and Adjusting
Verifying Burner Operation .............. 28
Verifying Operation of the
Supply Air Limit Switch ................. 28
Description of Components ................ 29
Furnace Accessories............................. 29
Maintenance ........................................... 29
Combustion Air and Vent System....29
Air Filter(s) ....................................... 29
Lubrication........................................ 30
Condensate Drain Assembly ........... 30
Blower Compartment ....................... 30
Heat Exchanger and Burner
Maintenance .................................. 30
System Operation Information............. 30
Sequence of Operation.................... 30
Furnace Fails to Operate ................. 31
Location of Major Components .......... 32
Wiring Diagram ....................................... 33
Installation/Performance
Checklist ......................................... 35
M 3 R L - 060 A - A W
Application
M-Manufactured Home
Furnace Series
Comfort Model
RL - Condensing Downflow
Heating Capacity
Input, BTUH (000’)
Table 1. Model Identification
Return Air Configuration
Blank - Front
T - Top
Door Color
W - White
G - Gray
Cabinet Dimensions
A - 56" x 19-3/4" x 23-3/4”
B - w/Coil Cavity,
76" x 19-3/4" x 23-3/4"
Electrical Code
A - 1PH, 60 Hz, 120 VAC
3
19-7/8
24-5/8
56-1/16
20-9/32
21-17/32
21-29/32
21-15/16
19-3/16
23-7/16
28-15/32
3-17/32
4-11/16
4-11/16
3-17/32
EXHAUST
VENT
17-13/16
COMBUSTION
AIR
INTAKE
21-11/32
7/8 Diameter
1-19/32
1-19/32
EXHAUST
VENT
1-11/16
COMBUSTION
AIR
INTAKE
3-17/32
24-3/4
20-1/16
18-1/2
18-1/2
(W/ Coil Box)
75-1/4
SIDE RETURN
KNOCKOUTS
SIDE RETURN
KNOCKOUTS
1-1/2
21-15/16
1-19/32
Cooling
Coil
Box
(W/O Coil Box)
GENERAL
(
)
21-11/32
COMBUSTION
17-13/16
EXHAUST
AIR
VENT
INTAKE
19-7/8
3-17/32
COMBUSTION
1-11/16
EXHAUST
VENT
AIR
1-1/2
INTAKE
24-5/8
SIDE RETURN
KNOCKOUTS
21-17/32
21-29/32
20-9/32
1-19/32
Top Return Knockouts
7/8 Diameter
23-7/16
3-17/32
4-11/16
56-1/16
28-15/32
Cooling
Coil
(W/O Coil Box)
3-17/32
4-11/16
19-3/16
Box
20-1/16
Figure 1. Furnace Dimensions
12.000
1.000
1.000
18-1/2
SIDE RETURN
KNOCKOUTS
1-19/32
1-19/32
24-3/4
18-1/2
21-15/16
21-15/16
(W/ Coil Box)
75-1/4
21.000
Top View
(AW and BW Models)
Furnace Specifications / Airflow Data
Furnace Furnace Temp. Recommended
Input Output Rise @ A/C
Model No.
Btuh Btuh .3"WC ° F CFM CFM CFM CFM CFM Ton
Top Return Opening
(BWT Models)
Motor HPMotor
Speed
High* 1660 1599 1544 1474 1410 4
Med-High 1512 1467 1416 1363 1304 3
External Static P ressure ( In ches Water Colum n )
Med-Low 1340 1304 1261 1217 1158 2.-1/2
M3 RL-060
M3 RL-080
Note: Data is for Operation with Filter.
60,000 54,000 3 5 - 65 Lo w* * 1176 1142 1 108 1025 966 2
80,000 72,000 35 - 65 Lo w 1176 1142 110 8 1025 966 2
1/2
High* 1660 1599 1544 1474 1410 4
Med-High 1512 1467 1416 1363 1304 3
Med-Low** 1340 1304 1261 1217 1158 2.-1/2
1/2
* Factory Wired Cooling Tap
** Factory Wired Heating Tap
Table 3. Furnace Specifications/Airflow Data
4
0.1 0.2 0.3
Shipping
Weight
Furnace Model
M3RL 060A A W 150
M3RL 060A B W* 170
M3RL 080A A W 155
M3RL 080A B W* 175
* May include suffix - T
Table 2. Shipping Weight
0.4 0.5Furnace
lbs
!
WARNING:
Do not use this appliance if any part
has been submerged under water. Immediately call a qualified service technician to inspect the appliance and to
replace any part of the control system
and any gas control that has been
submerged underwater.
NOTICE TO INSTALLER
Installer is advised to follow carefully all instructions and warnings in this manual to insure
maximum performance, safety, and operating
efficiency of these appliances. Improper installation may create hazardous conditions, and will
void the appliance warranty.
GENERAL
General Description
The M3 series gas furnaces are listed direct
vent (sealed combustion) forced air furnaces
for use with both natural and propane gases.
The M3 series is a Category IV and type FSP
furnace. The M3 furnace series has been
certified to the ANSI Z21.47/CSA2.3-2001 for
use in the United States and Canada and to the
UL307B —1995 for use in the United States.
5. Never test for gas leaks with an open
flame. Use a commercially available soap
solution made specifically for the detection
of leak to check all connections.
6. Always install furnace to operate within the
furnace’s intended temperature rise range
with a duct system that has an external
static pressure within the allowable range,
as specified in page 4 of these instructions. See furnace rating plate.
7. When a furnace is installed so that supply
ducts carry air circulated by the furnace to
areas outside the space containing the
furnace, the return air shall also be handled
by duct(s) sealed to the furnace casing
and terminating outside the space containing the furnace. Note: This section only
applies to furnaces installed with side or
top return air.
8. A gas-fired furnace for installation in a
residential garage must be installed as
specified in page 7 of these instructions.
9. The furnace is not to be used for temporary heat of buildings or structures under
construction.
M3 series furnaces are air conditioning ready
as shipped. The furnace cooling capacities of
the blower motor speed taps are shown in
Table 3. Table 2 lists the shipping weights for
the M3 series furnaces.
These furnaces may be installed in:
1. Manufactured Homes.
2. Park Models and Manufactured buildings
3. Modular Homes/Buildings
The following are safety guidelines with refer-
ences to their specific sections or pages in the
manual.
1. Use only type of gas approved for this
furnace. Refer to the furnace rating plate.
2. Install this furnace only in location and
position as specified in pages 7 - 13 of
these instructions.
3. Provide adequate combustion and ventilation air to the furnace space as specified in
pages 13 - 20 of these instructions.
4. Combustion products must be discharged
outdoors, connect this furnace to an approved vent system only, as specified in
pages 14-19 of these instructions.
OWNER INFORMATION
NORDYNE has been involved in the design of
products for the manufactured home industry
since the first manufactured home or trailer
was built.
NORDYNE originated the sealed combustion
system, which separates the furnace combustion system from the living area of the
home, now a standard for the manufactured
home industry.
NORDYNE engineers developed the first central heating system and the first central air
conditioner for manufactured homes.
NORDYNE is dedicated to bringing to its customers the finest heating and cooling comfort
possible. NORDYNE constantly seeks to further refine its products to continuously provide
exceptional comfort.
5
Follow the instructions in this booklet carefully
and this appliance will provide many years of
superior performance.
If you wish to cool your home automatically
with a central air conditioning system investigate the excellent NORDYNE cooling systems
available from your heating and cooling contractor. These systems are designed to work
best with your NORDYNE furnace and have
been carefully engineered to deliver optimum
performance when mated with NORDYNE
manufactured home furnaces.
NORDYNE also offers water heaters, fireplaces
and ventilating systems specifically designed
for manufactured housing applications. Check
with your manufactured home retailer, your
heating and cooling contractor or your
distributor for information. Write directly to the
factory (PO Box 8809, O’Fallon, MO 63366) if
you are not able to locate a source for NORDYNE
manufactured housing products in your area.
MANUFACTURER WARRANTY, OWNER’S
RESPONSIBILITIES
It is the sole responsibility of the homeowner to
make certain the gas furnace has been correctly
set up and converted to the proper fuel (L.P. gas
or Natural gas) and adjusted to operate properly. All gas furnaces are manufactured for
Natural gas and must be field converted when
using L.P. gas.
A warranty certificate with full details is included
with these instructions. However, NORDYNE
will not be responsible for any costs found necessary to correct problems due to improper
setup, improper installation, furnace adjustments,
improper operating procedure on the part of the
user, etc.
Some specific examples of service calls which
cannot be included in warranty payments are:
1. Converting the furnace to use another type
of gas.
2. Repairing duct work in the home found to be
faulty.
3. Correcting wiring problems in the electrical
circuit supplying the furnace.
4. Resetting circuit breakers, blown fuses or
other switches.
5. Correcting problems due to improper gas
supply pressure to the furnace.
6. Providing instructional training on how to
light and operate the furnace.
7. Furnace problems caused by installation of
an air conditioner, heat pump or other air
comfort devices.
8. Revising installation of the furnace flue
assembly.
9. Adjusting or calibrating of thermostat.
10. Any construction debris which falls into
the flue system.
Carefully review these responsibilities with your
manufactured housing dealer, service company
or gas supplier so there will be no misunderstanding at a later time.
!
CA UTION:
• Never attempt to alter or modify this
furnace or any of its components.
• Never attempt to repair damaged or
inoperable components. Such action
could cause unsafe operation, explosion, fire and/or asphyxiation.
• If a malfunction has occurred, or if
you feel that the furnace is not operating as it should, contact a qualified
service agency or gas utility for assistance.
INSTALLATION STANDARDS
Installer shall be familiar with and comply with all
codes and regulations applicable to the installation of these heating appliances and related
equipment. In lieu of local codes, the installation
shall be in accordance with the current provisions of one or more of the following standards.
a. Federal Manufactured Home Constructions
& Safety Standard (H.U.D. Title 24, Part
3280.707[a][2])
b. The Standard for Manufactured Home Instal-
lations (Manufactured Home Sites, Communities, and Set-Ups) ANSI A225.1 and/or
CAN/CSA-2240 MH Series).
c. American National Standard (ANSI-119.2/
NFPA-501C) for all recreational vehicle installations.
d. American National Standard (ANSI-Z223.1/
NFPA-54) and/or CAN/CGA B149 for all gasfired furnace models.
e. American National Standard (ANSI-C1/NFPA-
70) and/or CSA 22.1 Canadian Electric Code
Part 1 for all electrical field wiring.
6
CE générateur d'air chaud doit être installé
A
V
conformément aux instructions du fabricant et
aux codes locaux. En l'absence de code local,
respecter la norme ANSI Z223.,1, institulé National Fuel Gas Code ou les codes d'installation
CAN/GCA-B149.
The National Fuel Gas Code is available by
writing:
bustible material other than wood flooring. The
furnace may be installed on combustible flooring when installed on a Nordyne duct connector (see Table 5).
The ductwork within 3 feet of the furnaces
without the A/C coil box must be installed such
that surfaces are at least 1/4" from combustible
materials.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
NFPA publications are available by writing:
National Fire Protection Association
Batterymarch Park
Quincy, ME 02269
LOCATION
The furnace must be installed on a level surface, and as close to the center of the air
distribution system as possible. See Figure 1
for overall dimensions to determine the required clearances in hallways, doorways,
stairs, etc. to allow the furnace to be moved to
the installation point. The furnace must be installed so that all electrical components are
protected from water.
Minimum clearances to combustible materials
are listed in Table 4. Access for positioning and
servicing must be considered when locating
the unit.
This furnace is certified for use on wood
flooring. The furnace must be installed on a
solid surface and must be level front-to-back
and side-to-side. This furnace must not be
installed directly on carpeting, tile, or any com-
CLOSETALCOVE
LL MOD ELS Inches Inches
Front 1* 1*
Back 0 0
Sides 0 0
ent 0 0
Top 6 6
Duct (Plenum)
w/ Coil Box 0 0
w/o Coil Box 1/4 1/4
(within 3 feet)
*Note: For 1” clearance, use a fully louvered door with at
least 400 square inches of free airflow area.
When installed in a residential garage, the furnace must be positioned so the burners and the
source of the ignition are located no less than
18 inches above the floor and protected from
physical damage by vehicles.
CIRCULATING AIR SUPPLY
!
WARNING:
Products of combustion must not be
allowed to enter the return air openings
of the furnace or the circulating air
supply. Failure to prevent products of
combustion from being circulated into
the living space can create potentially
hazardous conditions including carbon
monoxide poisoning that could result in
personal injury or death.
The floor or platform on which the
furnace is mounted must provide sound
physical support of the furnace with no
gaps, cracks, or sagging between the
furnace and the floor or platform.
The circulating air ductwork must not
be connected to any other heat
producing device such as a fireplace
insert, stove, etc.
GENERAL
Plenums and air ducts must be installed in
accordance with the Standard for the Installation of Air Conditioning and Ventilating Systems
(NFPA No. 90A) or the Standard for the Installation of Warm Air Heating and Air Conditioning
Systems (NFPA No. 90B).
Table 4. Minimum Clearances
7
RETURN AIR PROVISIONS
(mm)
U.S.A. home manufacturers shall comply with
all of the following conditions to have acceptable return air systems for closet installed
forced air heating appliances:
a. Regardless of the location, the return air
opening into the closet shall not be less than
specified in the appliance’s listing.
b. Means shall be provided to prevent inadvert-
ent closure by a flat object placed over the
return air opening when it is located in the
floor of the closet (versus the vertical front
or side wall).
c. Closet installations must use a louvered
door having a minimum free area of 235 sq.
in. when located 6” from furnace. For clearance between 1” and 6” from furnace, requirements are a louvered door with minimum of 235 sq. in. free area, with the openings in closet door directly inline with the
louvered openings in the furnace door. For
1” clearance from furnace, use a fully louvered door with at least 400 sq. in. of free
airflow area.
d. The cross-sectional area of the return duct
system leading into the closet, when located
in the floor or ceiling shall not be less than 235
square inches.
e. The total free area of openings in the floor or
ceiling registers serving the return air duct
system must be at least 352 sq. in. At least
one register should be located where it is not
likely to be covered by carpeting, boxes and
other objects.
f. Materials located in the return duct system
must have a flame spread classification of
200 or less. This includes a closet door if the
furnace is in a closet.
g. Noncombustible pans having 1" upturned
flanges are located beneath openings in a
floor duct system.
h. Wiring materials located in the return duct
system shall conform to Articles 300-22 of
the National Electrical Code (ANSI C1/
NFPA-70).
19”
13 1/4"
10 1/4"
T op View
19"
Connector
of Duct
A Single trunk duct
Dual trunk duct
B
w/crossover connector
Transition duct
w/branches
C
Figure 2. Non-Platinum
Supply Duct System
If "X " (Fl o or Cavi ty) is: Model P ar t Num b er:
English Metric
10 1/4" 260 901992 904013
12 1/4" 311 901993 904014
FLOOR CAVITY
(depth equal to "X" in Figure 5 and Table 5)
x
SUPPLY AIR DUCT
Figure 4.
Use Duct Connecto r
Fin ger Tab Screw Down
7/8" 22 901987 904008
2" 51 901988 904009
4 1/4" 108 901989 904010
6 1/4" 150 901990 904011
8 1/4" 210 901991 904012
Table 5. Duct Connectors
Figure 3.
8
FELT-SEAL(
SPACERS
REDUCER
1
)
(1) FINGER TAB DUCT CONNECTOR ONLY
(2) SCREW DOWN DUCT CONNECTOR ONLY
C
Figure 5.
( )OPENING TO DUCT
(1) WITH PLATE (C) REMOVED
OPENING BECOMES
13-1/4” x 13-1/4”
(2) WITH PLATE (C) REMOVED
OPENING BECOMES
13" X 13". WITH REDUCER
IT IS 13" X 10-1/8".
SEE
X
TABLE 5
SIDE WALL
ALT. FUEL
LINE HOLES
C
L
FUEL LINE
HOLE
Figure 6. Closet or Alcove
i. Gas piping is not run in or through the return
duct system.
j. Test the negative pressure in the closet with
the air-circulating fan operating at high speed
and the closet closed. The negative
pressure is to be no more negative than
minus 0.05 inch water column.
k . For floor return systems, the manufactured
home manufacturer shall affix a prominent
marking on or near the appliance where it
can be easily read when the closet door is
open. The marking shall read:
!
CAUTION:
HAZARD OF ASPHYXIATION: Do not
cover or restrict return air opening.
l. Air conditioning systems may require more
duct register and open louver area to ob-
REAR WALL
10"
C
FLOOR
OPENING
L
23 -1/4"
tain necessary airflow. Use NORDYNE’s
certiduct program to determine proper duct
size for A/C.
DUCTED RETURN AIR
M3 furnaces with model numbers ending in AW
or BW are factory configured for the return air
to flow through the front louvered door. The
return air may also be attached to either side or
the top of the furnace cabinet using a field
installed kit. Refer to Table 12 for the NORDYNE
ducted return kit P/N number. The location and
size of the side and top return air connections
are shown in Figure 1. The filter size for the side
return air is 20” x 20” x 1”. For top return the
filter size is 24” x 16” x 1”.
M3 furnaces with model numbers ending in
BWT are factory configured for the return air to
enter the top of the furnace.
9
2-1/4
14-1/2
20
14-1/2
2-3/4
REAR WALL OF CLOSET OR ALCOVE
FLOOR CUT-OUT
FOR DUCT CONNECTIONS
FURNACE OUTLINE
17-29/32
23-1/4
21-3/4
˚
1-1/4
ALT FUEL LINE
ENTRY
24
Figure 7. Cut-Out Locations
AIR DISTRIBUTION SYSTEMS
For proper air distribution, the supply duct
system must be designed so that the static
pressure measured external to the furnace
does not exceed the listed static pressure
rating shown on the furnace rating plate.
Three typical distribution systems are illustrated in Figure 2. Location, size, and number
of registers should be selected on the basis of
best air distribution and floor plan of the home.
21-7/16
10
12-7/8
14-3/4
15-1/2
FLOOR CUT-OUT
FOR OPTIONAL
COOLING COIL
FOR NON-PLATINUM
SERIES UNITS
3-19/32
1-3/4
VENT
COMBUSTION AIR INTAKE
FUEL LINE ENTRY
2
1-3/4
FURNACE
OUTER DOOR
cavity. To maximize air delivery, remove reducer “C” (see Figure 5) to
obtain the largest open area that will fit
the duct/floor construction.
DUCT INSTALLATION
Required floor, ceiling, and roof cut-out openings must be carefully located to avoid misalignment of the furnace (see Figures 6 & 7).
Installation procedures are suggested for typical furnace installations and need not be followed in the exact listed sequence.
DUCT CONNECTOR SELECTION
PLATINUM SERIES
a. For Platinum ready construction use
the 14” round plenum, p/n: 903896.
NON-PLATINUM SERIES
a. Determine depth of floor cavity from
surface of floor to top of supply air duct
(See Figure 3).
b. Select appropriate model from Table 5
which matches X-dimension of the floor
10
CUT OUT FLOOR OPENING & FUEL LINE
HOLE
a. Determine center of closet or alcove (Fig-
ures 7 & 8).
b. Locate center of the floor opening, mea-
sured 10" from the rear wall, and mark cutout measuring approximately 14-1/2" by 141/2" (± 1”) for model duct connector used
(refer to Figures 4 & 5).
c. Locate center of gas line hole, measured 23-
1/4" from the rear wall and 6-5/8" to the left of
center of the floor cut-out (See Figure 6) or
REAR W
ALL
SUPPLY AIR DUCT
FUEL
LINE
HOLES
MOUNTING
PLATE
FLOOR
OPENING
BEND CONNECTOR TABS
UNDER DUCT OPENING
5-1/4" to the left of center of the floor cut-out,
or for entry through right-side of furnace
measured 9" to the right of center of the floor
cut-out.
d. Cut out floor opening and one gas line hole.
INSTALLING PLATINUM SERIES 14”
ROUND DUCT CONNECTOR
a. Place duct connector through the floor open-
ing. (See Figure 9).
b. Secure duct connector to floor.
CUT DUCT OPENING (FINGER TABBED
ONLY)
a. Place duct connector through the floor open-
ing with bottom tabs resting on top of the
supply air duct.
b. Center duct connector and push back against
rear edge of floor opening.
c. Mark cut-out location (tab area) and remove
duct connector.
d. Cut out duct opening 1/16" larger than area
marked.
INSTALL FURNACE MOUNTING PLATE
a. Place mounting plate (supplied within duct
connector) at rear of the floor opening (See
Figure 9).
MOUNTING
PLATE
FLOOR
OPENING
INSTALLING SCREW DOWN DUCT CONNECTOR
a. Apply a bead of caulking, mastic, or other
approved sealant around bottom side of 1/2”
flange and restrictor plate, when applicable.
b. Locate the duct connector over duct and
carefully lower screw down duct connector
into place.
c. Once duct connector is located on duct,
temporarily hold in place while fastening duct
connector to the floor using flat head screws
or nails. Be sure flanges of duct connector
stay in contact with the duct.
d. Screw plenum to duct making sure a seal is
made between the duct and the duct con-
REAR WALL
FUEL
LINE
HOLES
Finger Tabbed
Duct Connectors
SUPPLY AIR DUCT
Figure 8. Mounting Plate
SCREWS
MOUNTING
PLATE
FLOOR
OPENING
FUEL
LINE
HOLES
SUPPLY AIR DUCT
Screw Down
Duct Connectors
Figure 9. Duct Connector
PLENUM
MOUNTING
PLATE
SCREWS
Platinum Series
FUEL
LINE
HOLES
14” SUPPLY
CONNECTION
11
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