Nordyne CMF80-PG, CMF 100-PG, CMF80-PO, CMF 100-PO Owner's Manual

Counterflow Gas or Oil Heating Appliance

Owners Manual/Installation Instructions

CMF80-PG Convertible (65, 75, and 90 KBTU/H Inputs),
CMF 100-PG (90 KBTU/H Input)
CMF80-PO Convertible (65, 75, and 90 KBTU/H Inputs),
CMF 100-PO (90 KBTU/H Input)

Read all instructions carefully before beginning the installation. Read all labels and tags
on the furnace carefully and follow all precautions outlined on those labels and tags.

†

FOR YOUR SAFETY

Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.

reational vehicle, and residential
These furnaces are offered in either power gas
(designated by PG) or power oil (designated by
PO) models. The power gas models are de­signed for operation with either natural or pro­pane (LP) gas.

applications.

!

WARNING:

Improper installation, alteration, ser­vice or maintenance can cause injury
or property damage. Refer to this
manual for assistance or consult a
qualified installer, service agency, or
the gas supplier for additional infor­mation.

FOR YOUR SAFETY

WHAT TO DO IF YOU

SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric 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.

Rated CMF-PG CMF-PO CMF-PG CMF-PO
BTUH 80 CONV . 80 CONV . 100 100

Input 75,000 75,000 90,000 90,000

Output 56,000 60,000 68,000 72,000

GENERAL

CMF furnaces are high quality, direct vent
furnaces used for manufactured housing, rec-

The CMF series is convertible from power oil to
power gas, and vice versa. Furthermore, the
firing rate of the CMF80 Convertible Series can
be changed using a certified NORDYNE
conversion kit field-installed by a qualified service
technician. Refer to the “Firing Rate Conversion”
section later in these instructions for more
information on the firing rate change.

These furnaces are certified to the UL307
standards (UL 307A for oil models; UL 307B for
gas models), and can be installed in a variety of
applications, as shown in Table 1. This furnace
is not to be used for temporary heating of
buildings or structures under construction.

!

WARNING:

This furnace must be installed by a quali­fied installing agency and in accordance
with applicable local codes and ordi­nances that govern this type of equip­ment. Failure to properly install the fur­nace, base assembly, and venting sys­tem as described herein may damage the
equipment and/or the home, can create a
fire or asphyxiation hazard, violates U.S.
listing requirements, and will void the
warranty. This furnace is NOT approved
for installation with split system air con­ditioning. Use a NORDYNE packaged air
conditioning system.

!

g

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 under
water.

Installations (Manufactured Home Sites,
Communities, and Set-ups), ANSI 225.1.

All residential installations (Refer to Table 1)
must conform with these instructions, all
applicable local building codes, ANSI Z223.1/
NFPA 54 (National Fuel Gas Code), ANSI/
NFPA 31 (Installation of Oil-Burning Equipment),
ANSI/NFPA70 (National Electrical Code), and
NFPA 211 (Chimneys, Fireplaces, Vents, and
Solid Fuel-Burning Appliances).

INSTALLATION REQUIREMENTS

Equipment Check

All units are securely packaged at the time of
shipment and should be carefully inspected
upon arrival for damage. Claims for damages
(apparent or concealed), shortage in shipment,
or nondelivery should be filed immediately against
the carrier by the consignee. The carrier is
responsible for making prompt inspection of
damage and for a thorough investigation of
each claim. The manufacturer will not accept
claims for transportation damage.

Requirements and Codes:

Installer shall be familiar with and comply with all
codes and regulations and applicable to the
installation of these heating appliances and
related equipment.

All manufactured housing installations must
conform with these instructions, all applicable
local codes, ANSI Z223.1/NFPA 54 (National
Fuel Gas Code), ANSI/NFPA 31 (Installation of
Oil Burning Equipment), ANSI/NFPA 70
(National Electrical Code), the Manufactured
Home Construction and Safety Standard, Title
24 CFR, part 3280, or when this standard is not
applicable, the standard for Manufactured Home

The National Fuel Gas Code is available by
writing:

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

Combustion Air and Ventilation
Requirements

Provisions for adequate combustion air and
ventilation air must be in accordance with the
ANSI Z223.1/NFPA 54, (National Fuel Gas
Code), ANSI/NFPA 31 (Installation of Oil Burning
Equipment), and all applicable local codes.

Depending upon the type of installation (See
Table 1), the CMF furnace can draw the
combustion air either from outside the home
(direct vent) or from the space being conditioned.
A direct vent system is one in which the flue
products are exhausted to and the combustion
air is drawn from outside the house. A direct
vent system can also be referred to as a sealed
combustion system.

Type of Ducted Direct Vent Furnace Flue Products

Installation Application System Required Base Used Exhausted By

Manufactured

Housing o r Yes Yes

Recreat ional Vehicle

Residential

Residential

Residential

†Residential is only defined as a single-story non-manufactured housing installation.
*Refer to the "Venting Requirements" section later in these instructions for more details on properly venting this appliance

throu

h an existing chimney.

†

†

†

Yes

Yes

No

2

Yes

Yes

No

Table 1

MA-100 or MA-200

Univer s al Bas e

MA-100 or MA-200 NORDYNE SRJ Roofjack or

Univer s al Ba se an E x is t in g Chim ney *

CB-200A Cot tage NORDYNE S RJ Roof jac k or

Base an Existing Chimney*

CB-200A Cot tage NORDYNE S RJ Roof jac k or

Base an Existing Chimney*

NORDYNE SRJ

Roofjack Only

For direct vent applications either the combustion
air duct provided with the MA Series base kit or
the direct vent kit can be used. The direct vent
kit must be ordered separately. Only for a
special CB-200A cottage base installation can
the CMF draw the combustion air from the
conditioned space. The CB-200A cottage base
kit must be ordered separately. Refer to the
replacement parts listing provided with the
furnace to order the direct vent kit or the cottage
base kit. Follow the instructions provided with
the kits for proper installation.

When unsure about combustion air supply
availability, a direct vent system should be
used. For small rooms, confined spaces, tight
construction or similar situations in which the
combustion air requirements of the furnace
might not be met, a direct vent system must be
used. The air openings in the door of the unit and
the warm air registers from the ductwork or
base must not be restricted.

Combustion air must not be drawn from a
contaminated atmosphere. Excessive
exposure to contaminated combustion air will
result in safety and performance related
problems. Some examples of chemical
contaminants are chlorine, fluorine, and sulfur,
which can be found in a wide variety of some
common commercial and household products.

The installation of the furnace must allow for an
adequate supply of combustion air. The
combustion air opening of the furnace must be
designed and located to prevent blockage by
snow.

When drawing the combustion air from
underneath the home, ensure that a vent or duct
of at least 18 square inches of free area is
provided from outside. Check to ensure that the
combustion air opening is unobstructed. When
using the combustion air duct, ensure that it
extends through the floor. When using the
direct vent kit, the combustion air opening must
be located in the same pressure zone as the flue
exit of the roof jack or chimney. Refer to the
instructions provided with the direct vent kit for
more information.

Venting Requirements — Residential
Installations

!

WARNING:

This furnace is not to be connected to a
chimney flue serving a separate appli­ance designed to burn solid fuel.

For residential applications (Refer to Table 1),
the CMF furnace may be vented through the
SRJ series roofjack or through an existing
chimney. If the SRJ roofjack is to be used, then
the instructions for selecting the proper roofjack
for your installation are detailed later in these
instructions. If venting through an existing
chimney, then the venting system used must be
in accordance with these instructions, all
applicable local building codes, ANSI Z223.1/
NFPA 54 (National Fuel Gas Code), ANSI/
NFPA 31 (Installation of Oil-Burning Equipment),
and NFPA 211 (Chimneys, Fireplaces, Vents,
and Solid Fuel-Burning Appliances).

!

WARNING:

When venting through a chimney, check
the chimney for soot, leaks, obstruc­tions, and proper installation.

The materials used to construct the venting
system must be capable of withstanding
exposure to temperatures of at least 700 degrees
F. The existing chimney servicing this furnace
must be vertical. Horizontal distances to an
existing chimney must be as short as possible,
and the connecting pipe must slope upward to
the chimney at not less than a 45 degree angle.
The total length of the sloping pipe must not
exceed 6 feet. The venting system must have
no obstructions or sharp bends where soot and
other foreign matter can accumulate.

If an inspection determines that the chimney is
obstructed, the chimney must be cleaned.
Furthermore, the connecting flue pipe must be
cleaned or replaced.

Venting Requirements — Manufactured
Housing Installations

For all manufactured housing applications, the
CMF furnace must be vented using the SRJ
series roofjack. The instructions for selecting
the proper roofjack for your installation are
detailed later in these instructions.

For ONLY a CMF power oil furnace installation
vented into an existing chimney, a barometric
damper can be installed at the vent connection
of the furnace to regulate the draft. The barometric
damper must be properly installed per the
manufacturer’s instructions. Refer to all
applicable codes to determine whether or not a

3

barometric damper can be used for your CMF
power oil furnace installation. The barometric
damper used must be installed such that air
from the conditioned space can only enter the
flue passageway. Do not use a double acting
barometric damper. All flue pipe joints should be
fastened with sheet metal screws for rigidity.

The chimney height, required draft, and number
of appliances served by the chimney must be
in accordance with all applicable codes. To
prevent down draft, the chimney should extend
at least two feet above the peak of the roof.

( c ) In so far as is practical, close all building

doors and windows and all doors between
the space in which the appliance(s) con­nected to the venting system are located
and other spaces of the building. Turn on
clothes dryers and any appliance not con­nected to the venting system. Turn on any
exhaust fans, such as range hoods and
bathroom exhausts, so they shall operate
at maximum speed. Do not operate a
summer exhaust fan. Close fireplace
dampers.

It is recommended that the furnace flue serve
no other appliances. When the chimney serves
only the furnace, the flue area must be sized
according to all applicable codes. The minimum
internal area of the flue must be equal to at least
the area of the furnace flue exit.

When two or more appliances must vent through
a common flue, the area of the common flue
should be sized in accordance with all applicable
codes.

When an existing furnace is removed or replaced
in a venting system, then the venting system
may not be properly sized to vent the attached
appliances. The venting system must be
checked to ensure proper venting. Improperly
sized venting systems can result in the formation
of condensate, leakage, spillage, et cetera.
Refer to the ANSI Z223.1/NFPA 54, (National
Fuel Gas Code), and ANSI/NFPA 31( Installation
of Oil Burning Equipment) for correcting any
improperly operating venting system.

The following steps shall be followed with each
appliance connected to the venting system
placed in operation, while any other appliances
connected to the venting system are not in
operation:

(a ) Seal any unused openings in the venting

system.

(b) Inspect the venting system for proper size

and horizontal pitch, as required in the
ANSI Z223.1/NFPA 54, (National Fuel Gas
Code) and ANSI/NFPA 31 (Installation of
Oil
Burning Equipment), and these instruc­tions. Determine
that there is no blockage or restriction,
leakage, corrosion
or other deficiencies which could cause an
unsafe condition.

(d) Follow the lighting instructions. Place the

appliance being inspected in operation.
Adjust thermostat so appliance shall oper­ate continuously.

(e) Test for draft hood equipped appliance

spillage at the draft hood relief opening
after 5 minutes of main burner operation.
Use the flame of a match or candle.

(f) After it has been determined that each

appliance connected to the venting sys­tem properly vents when tested as out­lined above, return doors, windows,
exhaust fans, fireplace dampers and any
other gas burning appliance to their previ­ous conditions of use.

Flashing
Barrel

Ceiling Plate

Ventilation
Knock-Out

Return Air
Grille and
Filter

Power Supply
Connection

Access
Door

Base Pan

Fuel Line

Feeder Duct

Combustion
Air Duct

Vent

ROOF JACK

ASSEMBLY

FURNACE

ASSEMBLY

Combustion Air
Adapter (Not Shown)
is to be Installed
Over Combustion
Air Duct

DUCT

CONNECTOR

Figure 1. Typical Furnace Installation for

Manufactured Housing Applications

4

(g) If improper venting is observed during any

of the above tests, the venting system
must be corrected.

Unit Location and Clearance to Adjacent
Material Requirements

The unit must be installed in a level position. The
furnace must be installed with the minimum
clearances from adjacent materials as stated in
Table 2. Additional clearance should be provided
to permit servicing of filters, blower, motors,
controls, combustion air connections, and vent
connections.

Closet Alcove

ALL MODELS Installation Installation

Sides 0" 0"
Back 0" 0"
Front 6"** 18"
Top 17" 17"
Vent 6" 6"
Duct within 3’ from Furnace 1/4" 1/4"
Plenum 1" 1"
Roof Jack Barrel 0" 0"

** See Item K in the "Closet Installation of

Furnace" section later in these instruc­tions for clearance less than 6".

Table 2. Minimum Clearances

to Adjacent Materials

UNIT INSTALLATION

These instructions are intended for the use of
qualified individuals specially trained and
experienced in installation of this type equipment
and related system components. Installation
and service personnel are required by some
governing bodies to be licensed. Persons not
qualified should not attempt to install this
equipment or interpret these instructions.

MA-200 Base Installation

The MA-200 base is designed for O.E.M. and
replacement installation of the CMF series fur­nace (see Figures 2 and 3). The warm air duct
system should be designed so the duct static
pressure external to the furnace does not
exceed the static pressure listed on the furnace
data label.

Use the base pan to mark the 12-1/8" x 12-1/
8" center opening for the feeder duct. When the
4" offset feeder duct is used, the floor opening
will be offset 4 inches from the opening in the
main duct. If using the combustion air duct,
select and knock out the combustion air open­ing to be used. Then mark the 2-1/4" x 7-1/4"
opening for the combustion air duct.

Cut the opening for the feeder duct 14-1/8" x 14­1/8" in flooring (cutting opening 1" larger all the
way will allow the flanges on the underside of the
base pan to fit in the opening).

9-1/8

Feeder Duct

12-1/8

Flue

Location

Opening

7-1/8 X 2-3/16 Knock-outs

18-1/4

12-1/8

Combustion Air

FRONT

Figure 2. MA-200 Base Pan

If using the combustion air duct, cut the opening
for the duct about 1/8" larger than the marking
on the floor. Be sure to cut through all insulation
and the bottom board so that the combustion air
duct is unobstructed to outside air.

8-3/8

Drill an approximate 1" diameter hole for the fuel
line through the floor and bottom board to the
outside. Fuel lines are not supplied with the
furnace. They should be installed to comply
with all applicable codes.

24-1/8

Drop transition or offset feeder duct upside
down through the floor opening and center the
top of the feeder duct in 14-1/8" x 14-1/8" floor
opening. Using the feeder duct as a guide, mark
and cut a 12" x 12" opening in the distribution
duct. (See Figure 3)

Insert the feeder tabs into the main duct and
bend them over tightly so that the main duct
edges are trapped between flanges and tabs.
Metal tape may also be used to ensure an air
tight connection.

5

Install the base pan around the feeder duct with
the (2) screws through the holes towards the
rear of the base pan.

Slit the corners of the feeder duct down to the
top of the base pan. While the top of the
distribution duct is pulled up with one hand, bend
down each side of the feeder duct tightly to the
base with the other hand. Trim the metal to allow
a one inch flange over the top of the base pan
and seal that flange with the metal tape.

If a “V” or “U”-box crossover system is to be
used, see the instructions provided with the
crossover system.

Slit 4 Corners

Base

Bend Over Tabs

Flange

Bend Down 4 Sides

Heater Duct Below Joists

Floor

Joists

TRANSITION

DUCT

MA-100 Universal Base Installation

The MA-100 base is designed primarily for
replacement installation of the CMF series fur­nace where the manufactured home duct sys­tem may be small and restrictive to proper air
flow. The MA-100 base provides approxi­mately four (4) inches of additional plenum
space before the discharge air enters the manu­factured home duct system. (See Figures 4
and 5)

Use the bottom panel of the base assembly to
mark the 12-1/8" x 12-1/8" center opening for
the feeder duct. If using the combustion air duct,
select and knock out the combustion air open­ing to be used. Then mark the 2-1/4" x 7-1/4"
opening for the combustion air duct.

Cut the opening for the feeder duct 14-1/8" x 14­1/8" in flooring (cutting opening 1" larger all the
way around 12-1/8" x 12-1/8" template mark­ing). This will allow the four flanges on the
underside of the panel to fit into the opening.

Slit 4 Corners

Base

Flange

Bend Over Tabs

Bend Down 4 Sides

Heater Duct Below Joists

Floor

Joists

Figure 3. Transition and Offset Ducts

Feeder Duct

12-1/8

Opening

24-1/2

12-1/8

If using the combustion air duct, cut the opening
for the duct about 1/8" larger than the marking
on the floor. Be sure to cut through all insulation
and the bottom board so that the combustion air
duct is unobstructed to the outside air.

Drill a 1" hole for the fuel line through the floor and
bottom board to the outside. Fuel lines are not
supplied with the furnace. They should be
installed to comply with local codes.

Put the bottom base panel in place (See Figure

5). Drop the transition feeder duct upside down
through the opening and mark a 12" x 12"
opening to be cut into the distribution duct.
Remove the bottom panel and transition feeder
duct; then cut the opening into the distribution
duct.

Cut This Line

Bend Over

1"

Base

Feeder Duct

Along This Line

7-1/8 X 2-3/16 Knock-outs

Combustion Air

18-1/4

Figure 4. MA-100 Universal Base,

Bottom Panel

6

Floor

Joists

Heat Duct Below Joists

Figure 5. Feeder Duct Installation

Install the feeder duct by bending the tabs inside
the heat duct and using the metal tape to insure
an airtight connection.

Set the bottom base panel over the feeder duct.
Slit the corners of the feeder duct down to the
top of the base. While the top of the distribution
duct is pulled up with one hand, bend down each
side of the feeder duct tightly to the base with the
other hand. Trim the metal to allow one inch
flange over the top of the base and seal that
flange with the metal tape.

Secure the top panel to the floor with two (2)
screws through the front flange.

If a “V” or “U”-box crossover system is to be
used, see the instructions provided with the
crossover system.

Combustion Air Duct/Pipe Installation

The CMF furnace must draw the combustion air
from outside, except for special installations
(See Table 1). This can be accomplished either
by using the 2”X7” rectangular combustion air
duct provided in the MA series base kits or using
the direct vent kit.

When the rectangular combustion air duct is to
be used, install the combustion air duct through
the selected knockout in the base. For direct
vent applications, the rear knock-out in the
furnace base cannot be used. After the
combustion air duct has been positioned, install
the combustion air adapter. This adapter will
transition the 2”X7” opening of the combustion
air duct to the 2” diameter of the burner flexible
tubing. This adapter is included in the MA series
base kits. For retrofit applications in which the
MA series base is already installed, the
combustion air adapter can be ordered as a kit.
Refer to the Replacement Parts List for more
details on ordering this kit.
Secure the adapter with either wood or metal
fasteners (field provided), depending upon the
particular installation. Ensure that the gasket
for the adapter is positioned properly before
installing the adapter. Attach the flexible hose
from the burner to the combustion air adapter
using the provided metal hose clamp.

When the direct vent kit is used, follow the
instructions provided with the kit. Note: The
direct vent kit should be installed before
positioning the furnace on the base.

Damper Installation

An automatic shut-off damper is available (see
replacement parts list). An automated shut off
damper is required when the home is air con­ditioned by a self-contained unit. This damper
is designed to fit in the feeder duct cavity,
directly under the furnace. A damper is required
to prevent chilled air from flowing over the
furnace heat exchanger. For proper installa­tion, refer to the instructions provided with the
damper.

Installation of Furnace onto the MA-200
Base

Lift the furnace over the base so that the flange
at the back comes to rest on the inside rails of
the base.

Raise the front of the furnace to clear the gasket
on the bottom of the furnace and slide the back
until the rear flange drops into the channel at the
rear of the base. Be careful not to damage the
combustion air adapter, if present, while posi­tioning the unit.

Be sure that the furnace is all the way back so
as to engage the tabs on the rear flange on the
base.

Open the access door. Fasten the front of the
furnace and the base to the floor with #8 x 1/2"
long sheet metal screws.

Using the provided hose clamp, secure the
flexible combustion air tubing from the burner to
the combustion air adapter.

Installation of Furnace onto the MA-100
Base

Tilt the furnace forward and carefully work the
furnace back over the MA-100 Universal base.

Lift the furnace as necessary when positioning
the unit over the base assembly to prevent any
damage to the feeder duct assembly and com­bustion air adapter, if present.

Be sure the furnace is positioned all the way to
the back of the base assembly.

Open the furnace door and fasten the furnace
to the base using #8 x 1/2" long sheet metal
screws.

7

Using the provided hose clamp, secure the
flexible combustion air tubing from the burner to
the combustion air adapter.

CB-200A Cottage Base Installation

The CMF can be installed on a CB-200A cottage
base in certain applications, as described earlier
in these instructions (See Table 1). Refer to the
Replacement Parts List for information on
ordering this base. For installation, refer to the
instructions that are provided with the CB-200A
base kit.

Closet Installation of the Furnace

Return air systems for a closet installation of the
furnace may consist of a grille or grilles in a
closet door or side wall that
communicates with the living area of the home.
(See Figure 6) Return air openings should not
be located to draw air directly from a bathroom.
Grilles placed in a side wall require a 6" clear­ance from the wall to the furnace so that the air
may enter the front grille of the furnace. In
addition, all return air systems, including the
floor and ceiling systems, must meet the follow­ing conditions:

E. Materials located in the return duct system

shall have a flame spread classification of
200 or less.

F. Noncombustible pans having one inch

upturned flanges are located beneath
openings in a floor return duct system.

G . Hollow spaces used as ducts or plenums

for environmental air may contain mineral­insulated metal sheathed cable, aluminum
sheathed cable, electrical metallic tubing,
rigid metal conduit, flexible metal conduit
not to exceed four (4) feet, or metal-clad
cables. Wiring materials, fixtures, are to
be suitable for the expected ambient
temperatures to which they will be sub­jected.

H. Gas piping cannot be located in the return

duct system.

I. The negative pressure in the closet must

not be less than minus 0.05 inches water
column with the closet door closed and the
fan operating at high speed. A reading
below minus 0.05" indicates a dirty filter or
a restricted return air system.

A. The return-air opening into the closet,

regardless of its location, is to be a mini­mum of 200 square inches.

B. If the return-air opening is located in the

floor of the closet (versus the vertical front
or side wall), the opening is to be provided
with means to prevent its inadvertent clo­sure by a flat object placed over the open­ing.

C. The cross-sectional area of the return

duct system (when located in the floor or
ceiling of the manufactured home) leading
into the closet is to be not less than 200
square inches.

D. The total free area of the openings in the

floor or the ceiling registers serving the
return air duct system is to be not less than
300 square inches. At least one such
register is to be located where the likeli­hood of its being covered by carpeting,
boxes, and other objects is minimized.

8

Figure 6. Closet Installation

J. For floor return systems, the manufac-

tured housing manufacturer or installer
shall affix a prominent marking on or near
the appliance where it is easily read when
the closet door is open. The marking shall
read: “CAUTION, HAZARD OF AS­PHYXIATION. DO NOT COVER OR
RESTRICT FLOOR RETURN AIR OPEN­ING.” or equivalent. (This label is supplied
with the instruction manual in each fur­nace.)

K. For closet installation with less than 6"

front clearance, but not less than 1", a
louvered door must be used having a
minimum 200 square inch free area open­ing directly in line with openings in the
furnace door. A fully louvered door having
the minimum free area is also permitted if

the front tolerance is not less than 4".
Adjust duct registers to obtain a tempera­ture rise within the range specified on the
furnace nameplate.

!

WARNING:

Failure to comply with the above proce­dure and the following instructions may
result in fire, asphyxiation or carbon
monoxide poisoning.

SRJ Roof Jack Installation

Refer to Figure 7 to determine SRJ roof jack
and appropriate accessories required for
your installation.

RA-S4

RA-S3

RA-S2.5

None

4/12

3/12

2-1/2

/12

Flat

When roof pitch is:
Use Adaptor

Model No.

OPTIONAL:
Raised Inlet Models (-C)
RoofJack Adaptor (Use to mount roofjack on pitched roof)
Protective Cap (Use when top of roofjack is removed)

SRJ1 & SRJ2 Models are one piece construction
SRJ3, SRJ4, & SRJ5 Models are two piece construction

-C Models are two piece construction

14" Removable SRJ3, SRJ4, & SRJ5
25" Removable All -C Models

Adaptor

1/2 Minimum

57"

Furnace
CMF Series

Ceiling Trim Plates

When Ceiling Cavity is:

Use Roof Jack Model No.

And Ceiling Height is:

Add Suffix

For Vent Pipe

Add -C for Raised Inlet Models
Example: SRJ3-34-C

49" to 59"

37" to 48"

25" to 36"

13" to 24"

12" or Less

SRJ5

SRJ4

SRJ3

SRJ2

SRJ1

7'

-28

7'6"

-34

8'

-40

Furnace Base Package for O.E.M. and replacement installations . Model No. MA-200
See Replacement Parts List for types of Base Packages offered.

Furnace Base Package for replacement installations .....................Model No. MA-100

See Replacement Parts List for types of Base Packages offered.

Figure 7. Selection of Roof Jack and Accessories Chart

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