Nordyne M1GB 070, M1GB 056, M1GD 056, M1GH 070, M1GC 056 Installation Instructions And Owner's Manuals
...
Downflow, Direct Vent (Sealed Combustion)
Forced Air Gas and Oil Furnaces
Installation Instructions/Owners Manual
Series M1B, M1G, M1M and M1S
For installation in:
1. Manufactured Homes
2. Recreational Vehicles, Park Models, Manufactured Buildings
3. Modular Homes/Buildings
!
WARNING:
If the information in this manual is not followed exactly,
a fire or explosion may result causing property damage,
personal injury or loss of life.
–Do not store or use gasoline or other flammable va-
pors 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 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.
WARNING:
!
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.
WARNING:
!
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.
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.
LEAVE THESE INSTRUCTIONS WITH THE HOMEOWNER.
TABLE OF CONTENTS
1. SPECIFICATIONS ..........................................................................................................................................................................3
2. OWNERS INFORMATION ..............................................................................................................................................................4
3. MANUFACTURER WARRANTY, OWNER RESPONSIBILITY ......................................................................................................4
4. INSTALLATION STANDARDS .......................................................................................................................................................4
5. UNIT LOCATION ............................................................................................................................................................................ 5
6. MINIMUM CLEARANCES...............................................................................................................................................................5
7. RETURN AIR PROVISIONS ...........................................................................................................................................................5
8. AIR DISTRIBUTION SYSTEMS......................................................................................................................................................6
9. ROOF JACK SELECTION ..............................................................................................................................................................6
10. DUCT CONNECTOR SELECTION ................................................................................................................................................ 7
11. INSTALLATION ..............................................................................................................................................................................8
12. INSTALLATION OF TRANSIT-MODE VENTING SYSTEM .........................................................................................................11
13. ELECTRICAL WIRING .................................................................................................................................................................11
14. FUEL PIPING................................................................................................................................................................................12
15. FLUE GAS SAMPLING.................................................................................................................................................................14
16. LIGHTING AND FURNACE SHUT DOWN ...................................................................................................................................14
17. SERVICE GUIDE ..........................................................................................................................................................................18
18. MAINTENANCE ............................................................................................................................................................................22
19. OPTIONAL ACCESSORIES .........................................................................................................................................................23
20. WIRING DIAGRAMS................................................................................................................................................................24-26
21. EQUIVALENT ORIFICE SIZES AT HIGH ALTITUDES ................................................................................................................27
Application
M-Manufactured Home
Furnace Series
Fuel, Type of Combustion
G-Gas, Direct Vent, Pilot Burner
Natural or Forced Draft
M-Gas, Direct Vent, HSI, Forced Draft
B-Gas, Direct Vent, Gun Burner
S-Oil, Direct Vent, Gun Burner
Comfort Model
H - Heating
A - Heating, A/C Ready
B - A/C Ready, 3 Ton
C - A/C Ready, 4 Ton
D - A/C Ready, 5 Ton
2
M 1 M B - 056 A - B W
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
Heating Capacity
Input, BTUH (000’)
Table 1. Model Identification
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.
1. SPECIFICATIONS
GENERAL DESCRIPTION
M1 Series gas and oil furnaces are listed direct vent (sealed
combustion), downflow heating appliances for manufactured
(mobile) homes, recreational vehicles, and for use in residential/
modular/commercial construction. The furnace must be located
so that venting can be properly achieved.
Furnace Input Output Orifice No E.S.P. Pilot Ignitor Comb. Motor A/C Ready
Model No MBtu/h MBtu/h Nat. LP In WC Burner Direct Blower Hp Tons
M1G H 056 56 45 29 45 0.2 x 1/8 2*
M1GB 056 56 45 29 45 0.3 x 1/3 3
M1G C 056 56 45 29 45 0.3 x 1/2 4
M1G D 056 56 45 29 45 0.3 x 3/4 5
M1G H 070 70 57 24 42 0.3 x 1/5 2½*
M1GB 070 70 57 24 42 0.3 x 1/3 3
M1G C 070 70 57 24 42 0.3 x 1/2 4
M1G D 070 70 57 24 42 0.3 x 3/4 5
M1G H 077 77 60 21 40 0.3 x x 1/ 4 3*
M1GB 077 77 60 21 40 0.3 x x 1/4 3
M1G C 077 77 60 21 40 0.3 x x 1/ 2 4
M1G D 077 77 60 21 40 0.3 x x 3/ 4 5
M1G H 090 90 70 17 36 0.3 x x 1/ 4 3*
M1GB 090 90 70 17 36 0.3 x x 1/4 3
M1G C 090 90 70 17 36 0.3 x x 1/ 2 4
M1G D 090 90 70 17 36 0.3 x x 3/ 4 5
M1MA 056 56 46 29 45 0.2 x x 1/ 8 2
M1MB 056 56 46 29 45 0.3 x x 1/ 3 3
M1MC 056 56 46 29 45 0.3 x x 1/ 2 4
M1MD 056 56 46 29 45 0.3 x x 3/ 4 5
M1MA 070 70 57 24 42 0.3 x x 1/ 5 2½
M1MB 070 70 57 24 42 0.3 x x 1/ 3 3
M1MC 070 70 57 24 42 0.3 x x 1/ 2 4
M1MD 070 70 57 24 42 0.3 x x 3/ 4 5
M1MB 077 77 62 21 40 0.3 x x 1/ 4 3
M1MC 077 77 62 21 40 0.3 x x 1/ 2 4
M1MD 077 77 62 21 40 0.3 x x 3/ 4 5
M1MB 090 90 72 17 36 0.3 x x 1/ 4 3
M1MC 090 90 72 17 36 0.3 x x 1/ 2 4
M1MD 090 90 72 17 36 0.3 x x 3/ 4 5
M1BA 066 66 53 26 43 0.24 x x 1/ 5 2½
M1BC 066 66 53 26 43 0.3 x x 1/2 4
M1BB 086 86 68 18 37 0.3 x x 1/4 3
M1BC 086 86 68 18 37 0.3 x x 1/2 4
M1SA 066 66 54
M1SC 066 66 54
M1SB 086 86 71
M1SC 086 86 71
Electrical Supply - 120 volts, 60HZ, 1 Ph. Thermostat Circuit - 24 volts, 60HZ, 30 vac
Fuse or Breaker - 15 amps Normal Anticipator Setting - 0.4
Temperature Rise - 45° to 75°F Manifold Pressure - Natural Gas: 3.5” w.c. LP Gas: 10” w.c.
High Altitude - See Table 11. For Canadian High Altitude (2,000’ to 4,500’), reduce the gas manifold pressure
to 3.0” W.C. for natural gas and to 8” W.C. for LP gas.
*Blower capacity only - needs relay box for AC
.50 Gph
.50 Gph
.65 Gph
.65 Gph
“A” cabinet models may be installed with Optional Coil Cabinet
Model #911969 for air conditioning.
“B” cabinet models are factory equipped with a built-in coil cavity.
Multi-speed blower assemblies as shown in Table 3 have
been certified for field installation in M1 Series furnaces. An air
conditioner can be easily field installed with M1GH Series
furnaces if used in conjunction with certified 2-wire relay box,
p/n 903092A or 4/5 wire relay box 902898A.
Part No.
903412 10 x 8 1/3 2, 2½ & 3
903413 11 x 8 1/2 2, 2½ , 3 & 4
903414 10 x 8 3/4 2, 2½ , 3, 4 & 5
0.24 x Burner M odel 1/ 5 2½
0.3 x AF- 10 Noz z le 1/2 4
0.3 x Spray Angle 1/4 3
0.3 x 80° A 1/2 4
Table 2. M1 Furnace Specifications
Blow er Wheel Moto r -Hp Ton
Table 3. Field Installation Blower Assemblies
Blo we r / Moto r Ass embly
A/C Capacity
3
2. OWNER INFORMATION
Some specific examples of service calls which cannot be
included in warranty payments are:
ABOUT YOUR CENTRAL
FURNACE SYSTEM
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.
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 46911, St.
Louis, MO 63146) if you are not able to locate a source for
NORDYNE manufactured housing products in your area.
3. MANUFACTURER WARRANTY,
OWNER’S RESPONSIBILITIES
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. Adding a Roof Jack extension because of unusual wind
and/or snow conditions.
9. Revising installation of the furnace flue assembly (Roof
Jack).
10. Adjusting or calibrating of thermostat.
11. Any construction debris which falls into 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.
!
CAUTION:
• 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.
4. 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.
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.
4
a. Federal Manufactured Home Constructions & Safety
Standard (H.U.D. Title 24, Part 3280.707[a][2])
b. American National Standard (ANSI-119.2/NFPA-
501C) for all recreational vehicle installations.
c. American National Standard (ANSI-Z223.1/NFPA-54)
and/or CAN/CGA B149 for all gas-fired furnace models.
d. American National Standard (ANSI-Z95.1/NFPA-31)
and/or CSA B139 for all oil-fired 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.
f. Units have been investigated under standards UL
307A & B, ANZI 21.47a — CAN/2.3a - 1995, and CSA
B140.10.
5. UNIT LOCATION
The furnace shall be appropriately located to the supply and
return air distribution system. (See “AIR DISTRIBUTION”,
Page 7) Sides and back of the furnace may be enclosed by
wall framing. (See “Minimum Clearances,” Table 4, and
Figures 2 through 5.)
The furnace installation is only intended for free air return
through the furnace door louvers. DO NOT connect a ducted
return air system directly to the furnace. Improper installation
may create a hazard and damage equipment, as well as void
all warranties.
ALL MODE LS CLO SET ALCO VE
Front 6" 18"
Back 0" 0"
Sides 0" 0"
Roof Jack 0" 0"
Top 6" 6"
Top and S id es of Duct 0" 0"
Bottom of Duct
B Cabi ne t 0" 0"
A Cabi net (w/ c o il box) 0" 0"
A Cabi ne t (w/o coi l box) 1/4" 1/4"
Table 4. Minimum Clearances
Furnace may be installed on combustible flooring when using
NORDYNE Duct Connectors (see Table 7 and Figures 9-16).
6. MINIMUM CLEARANCES
This heating appliance must be installed with clearances not
less than the minimums shown in Table 4. This heating
appliance must be installed with ample clearance for easy
access to the air filter, blower assembly, burner assembly,
controls, and vent connections.
a. Alcove installations (see Figure 2): minimum 18"
clearance at front of furnace shall be provided for future
servicing. A removable access panel should be installed
between top of the furnace door frame and the ceiling.
b. Closet installations must use a louvered door having a
minimum free area of 235 sq. in. when located 6" from
furnace (See Figure 3). For special clearance between
1" and 6", requirements are a louvered door with a
minimum of 250 sq. in. free area, with the openings in
the closet door directly in line with the louvered openings
in the furnace door . A fully louvered closet door may
be used (See Figure 4).
“A”- 56"
“A” Modelw/o Coil Cabinet
“B” Modelw/Coil Cabinet
19 3/4"
Figure 1. Overall Dimensions
“B”- 76"
23 3/4"
7. RETURN AIR PROVISIONS
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:
!
CAUTION:
HAZARD OF ASPHYXIATION: Negative
pressure inside the closet, with closet door
closed and the furnace blower operating on
high speed, shall be no more negative than
minus 0.05 inch water column.
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 inadvertent 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. 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 (or
390 square inches for 5 ton ready M1 Furnaces).
d. 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.
e. 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.
f. Noncombustible pans having 1" upturned flanges are
located beneath openings in a floor duct system.
g. Wiring materials located in the return duct system
shall conform to Articles 300-22 of the National
Electrical Code (ANSI C1/NFPA-70).
h. Gas piping is not run in or through the return duct
system.
i. 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.
5
6" (152 mm)
A Single trunk duct
B
Dual trunk duct
w/crossover connector
C
Transition duct
w/branches
Top Clearance
0" Side
Clearance
to Furnace
Cabinet
6" (152 mm)
Top Clearance
0" Side
Clearance
to Furnace
Cabinet
6" (152 mm)
Top Clearance
Provide removable
access panel above
furnace door frame to
access roof jack
18"
(457 mm)
Figure 2. Alcove Installation
Provide min. 235
sq. in. (1516 cm )
open free area in
front or side wall
6"
(152 mm)
Figure 3. Closet Installation
Provide min. 250
sq. in. (1613 cm )
open free area in
front or side wall
Nearest
Wall or
Partition
2
or
In closet
door
located
at top,
center
or bottom
CLOSET DOOR
2
j. 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:
k. Air conditioning systems may require more duct,
register and open louver area to obtain necessary
airflow. Use NORDYNE’s certiduct program to
determine proper duct size for A/C.
8. 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 5.
!
CAUTION:
HAZARD OF ASPHYXIATION: Do not cover or
restrict return air opening.
Location, size, and number of registers should be selected
on the basis of best air distribution and floor plan of the home.
9. ROOF JACK SELECTION
Note: Install only Roof Jack Assemblies listed in Table 5 on
this heating appliance.
a. Determine depth of ceiling cavity from center of roof
opening to center of ceiling opening. (See Dimension
“A” in Figure 6.)
b. Determine ceiling height and subtract height of furnace.
(See Dimension “B” in Figure 6.)
c. Add dimensions A + B (and X from Table 6 and Figure
7 if slant deck flashing is used). The total length of (A
+ B + X) must be within the minimum and maximum
range of one of the Roof Jacks listed in Table 5.
0" Side
Clearance
to Furnace
Cabinet
1"
(25 mm)
Figure 4. Special 1" Clearance
6
A fully
louvered
door may
be used
CLOSET DOOR
Figure 5. Typical Supply Duct System
APPLICATION NOTES:
a. FAW, FAWT, SAW and SAWT Series Roof Jacks with
a 5" diameter inner vent pipe may be used with all
models of M1 Series gas and oil furnaces.
b. F=Flat Flashing; flexes from 0/12 to 1/12 roof slope.
c. S=Slant Flashing. 2.5/12 Slope flexes from 1/12 to
4/12 roof slope, 4/12 flexes from 3/12 to 5/12.
d. Stainless steel roof jacks are available.
e. If the roof jack crown is covered or blocked with snow,
the furnace will not operate properly. If the home is
located in regions where snow accumulation exceeds
7” (HUD snowload zones) use an external roof jack
extension p/n 901937.
f. M1 furnaces may be used with roof jacks as tall as 170”
(except M1M 056 & M1B 066 models, which are
limited to 120”). An internal roof jack extension (p/n
901935 - 10”, p/n 903107 - 18”) can be used to
increase roof jack height. All connections inside the
home must be made below the ceiling.
These extensions are available as optional accessories and
may be purchased through your NORDYNE distributor.
Approx. Length
Model Number Below Flashing
(F,S)A W(T)1523-(0,2, 4)(A , S ) 15" - 23"
(F,S)A W(T)2135-(0,2, 4)(A , S ) 21" - 35"
(F,S)A W(T)2747-(0,2, 4)(A , S ) 27" - 47"
(F,S)A W(T)3563-(0,2, 4)(A , S ) 35" - 63"
(F,S)A W(T)5195-(0,2, 4)(A , S ) 51" - 95"
F=S=FLAT FLASHING
SLANT FLASHING
AW= ALL WEATHER
SSAW
T
TYPE:
BLANK=NON-TRANSIT
T= TRANSIT MODE
20
MIN. ADJ.
LENGTH
32 - 2
MAX. ADJ.
LENGTH
FLUE STEEL TYPE
A= ALUMINIZED
S=STAINLESS
FLASHING
PITCH/12" RISE
0=FLAT
2=2.5/12
4=4/12
Roof Jack
Flat Roof
Ceiling Cavity
Ceiling
Flue Pipe
Combustion
Air Pipe
Furnace
Figure 6. Roof Jack Assemblies
PITCHED
ROOF
CEILING CAVITY
CEILING
This joint
may be
above ceiling
Flashing
"A"
"B"
56" or 76"
ROOF JACK
SLANT DECK
FLASHING
"X" (SEE TABLE 1)
ROOF OPENING
CEILING OPENING
6
Figure 5a. All Weather Roof Jack Assemblies
MODEL APP ROX. ADJ.
NUMBER LENGTHS*
BEL O W F L AS H I NG
FO1323 -5 13" - 23"
FO2343 -5 23" - 43"
SO1835 -5 18" - 35"
SO2447 -5 24" - 47"
SO3263 -5 32" -63"
SO4895 -5 48" - 95"
SOT2442 -5 24" - 42"
SOT2745 -5 27" - 45"
SOT4581 -5 45" - 81"
FOT2846 -5 28" - 46"
S O T 27 45 -5
S= SLAT FLASHING
F= FLAT FLASHING
O= TYPE; STANDARD
H= HIGH WIND
A= ARCTIC ROOF JACK
Table 5b. Roof Jack Assemblies
T= TRANSIT
MODE
TYPE
MIN. ADJ.
LENGTH
MAX. ADJ.
LENGTH
5 = 5" FLUE DIA.
Figure 7.
ROOF JACK WITH
1
2
/12 SLANT
2
FLASHING
1
/12
2
2
SLANT DECK
5/12 ROOF SLOPE
Figure 8.
10. DUCT CONNECTOR SELECTION
a. Determine depth of floor cavity from surface of floor to
top of supply air duct (See Figure 9).
b. Select appropriate model from Table 7 which matches
X-dimension of the floor cavity. To maximize air delivery,
remove reducer “C” (see Figure 11) to obtain the
largest open area that will fit the duct/floor construction.
7
T
IF PITCH IS: FLASHING NO. "X" FACTOR IS:
2" in 12" 901942 2 1/8" (54MM)
(51mm/304m m)
2 1/2" in 12" 901941 2 1/2" (64MM)
(64mm/304m m)
3" in 12" 901940 2 7/8" (73MM)
(76mm/304m m)
3 1/2" in 12" 901939 3 1/4" (83MM)
(89mm/304m m)
4" in 12" 901938 3 5/8" (92MM)
(102mm/304mm)
5" in 12" Use 901941 2 1/ 2" (64MM )
(127mm /304mm) wit h flue having
slant flas hing.
See F i g. 8
Table 6. Optional Slant Deck Flashings
FLOOR CAVITY
(depth equal to "X" in Figure 11 and Table 7)
x
SUPPLY AIR DUCT
Figure 9.
19”
If "X"
(Floor cavity) is:
Use Du c t
Connector Model
7/8" (22mm ) 901987
2" (5 1m m ) 901988
4 1/4" (108mm ) 901989
6 1/4" (159mm ) 901990
8 1/4" (210mm ) 901991
10 1/ 4" (260mm ) 901992
12 1/ 4" (311mm ) 901993
Table 7. Duct Connectors
11. INSTALLATION
Required floor, ceiling, and roof cut-out openings must be
carefully located to avoid misalignment of the furnace and
Roof Jack (see Figures 12 & 13). Installation procedures are
suggested for typical furnace installations and need not be
followed in the exact listed sequence.
CUT OUT FLOOR OPENING & FUEL LINE HOLE
a. Determine center of closet or alcove (Figure 13).
b. Locate center of the floor opening, measured 10" from
the rear wall, and mark cut-out measuring
approximately 14-1/2" by 14-1/2" (± 1”) for model duct
connector used (refer to Figures 10 & 11).
c. Locate center of fuel 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 12) or 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 fuel line hole.
13 1/4"
10 1/4"
Figure 10.
REDUCER
FELT-SEAL
SPACERS
C
Figure 11.
8
Top View
of Duct
Connector
19"
OPENING TO DUCT
WITH PLATE (C) REMOVED
OPENING BECOMES
13-1/4” x 13-1/4”
SEE
X
TABLE 7
!
IMPORTANT:
Refer to the installation instructions provided
with optional air conditioning packages when
installing furnaces with optional cooling coil
cabinet or with optional C***-series indoor coils.
CUT OUT CEILING AND ROOF OPENINGS
a. Locate center of Roof Jack opening, measured
13 1/2" from the rear wall of closet or alcove along the
center line of furnace and floor opening. (See Figure 13)
b. Cut ceiling and roof holes as follows:
Ceiling Hole = 8-3/4" (222 mm) diameter
Roof Hole = 9-3/8" (238 mm) diameter
c. DO NOT ALLOW DEBRIS TO FALL INTO THE
FURNACE. THIS COULD CAUSE UNSAFE
OPERATION AND VOIDS THE FURNACE
WARRANTY. Use the top cap that comes with the
furnace packaging (or alternate protector) to prevent
debris from falling into the furnace before the final roof
jack connection is made.
REAR WALL
MOUNTING
PLATE
FLOOR
OPENING
FUEL
LINE
HOLES
SUPPLY AIR DUCT
CUT DUCT OPENING
1/16TH. LARGER THAN
DUCT CONNECTOR
REAR WALL
SUPPLY AIR DUCT
FUEL
LINE
HOLES
MOUNTING
PLATE
FLOOR
OPENING
UNDER DUCT OPENING
ALT. FUEL
LINE HOLES
CEILING AND ROOF
OPENINGS
C
L
REAR WALL
SIDE WALL
10"
C
C
L
FUEL LINE
HOLE
FLOOR
OPENING
L
23 -1/4"
Figure 12. Closet or Alcove
20"
14-1/2"
C
L
13-1/2"
C
L
Figure 14. Mounting Plate
2-3/4"
REAR WALL OF CLOSET OR ALCOVE
FLOOR CUT-OUT
C
L
FOR DUCT CONN.
CEILING
CUT-OUT FOR
FLUE AND
ROOF JACK
(See Fig 12)
FLOOR CUT-OUT
FOR OPTIONAL
COOLING COIL
C
L
10"
12-7/8"
14-3/4"
15-1/2"
24"
21-3/4"
23-1/4"
1-1/4" D.
ALT FUEL-LINE
14-1/2"
ENTRY
2-1/4"
C
L
Figure 13. Cut-Out Locations
CUT DUCT OPENING
a. Place duct connector through the floor opening 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 1/4" larger than area marked.
INSTALL FURNACE MOUNTING PLATE
a. Place mounting plate (supplied within duct connector)
at rear of the floor opening (See Figure 15).
13-1/2"
FURNACE OUTLINE
FUEL-LINE
3/4"
1-3/4"
FURNACE
OUTER DOOR
Figure 15. Duct Connector
TABS TABS
DUCT DUCT
1. INSERT DUCT PLENUM CONNECTOR
INTO DUCT CUT-OUT.
2. BEND BOTTOM TABS OVER
AND ONTO THE UNDERNEATH
DUCT SERVICE.
Figure 16. Installation of Duct Connector
INSTALL DUCT CONNECTOR
a. Place duct connector through the floor opening with
2"
bottom tabs extending through the duct opening. (See
Figure 15)
b. Secure duct connector to floor.
c. Bend bottom tabs under and up tightly against the
supply air duct (See Figure 16).
NOTE: The duct connector is designed for use on ducts 12"
in width. When using the connector on 12" wide ducts, there
may be insufficient clearance to bend the tabs on two sides of
the duct connector. In such cases the tabs may be attached
to the sides of the duct by using sheet metal screws or other
suitable fasteners. (See Figure 17).
If tape is used to provide a better seal, it should be approved
by applicable national or local codes.
ALTERNATE ATTACHMENT METHODS
This procedure may also be used to install a furnace duct
connector to narrow metal ductwork where insufficient
clearance prevents bending of the duct connector tabs at the
side(s) of the duct. (See Figure 18).
9
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