Broan CB-200A Cottage Base Installation guide
- Type
- Installation guide
Broan CB-200A Cottage Base is designed for use with a CMF series furnace and can be used in two different installations:
- A residential† single-story dwelling type installation, for which no ductwork can be used. In some special cases, a direct vent system‡ is required for this type of installation.
- A direct vent residential † single-story dwelling type installation, for which ductwork can be attached to the cottage base.
The Combustion Air for the CMF / CMF2 Furnace may be drawn directly from the conditioned space using the side panel grilles.
Broan CB-200A Cottage Base is designed for use with a CMF series furnace and can be used in two different installations:
- A residential† single-story dwelling type installation, for which no ductwork can be used. In some special cases, a direct vent system‡ is required for this type of installation.
- A direct vent residential † single-story dwelling type installation, for which ductwork can be attached to the cottage base.
The Combustion Air for the CMF / CMF2 Furnace may be drawn directly from the conditioned space using the side panel grilles.
INSTALLATION INSTRUCTIONS
ABOUT THE CB-200A COTTAGE BASE
The model CB-200A cottage base is designed for use with
a CMF series furnace and can be used in two different
installations See Table 1:
• Aresidential
†
single-story dwelling type installation, for which
no ductwork can be used. In some special cases, a direct
vent system
‡
is required for this type of installation. Refer to
the Combustion and Ventilation Air Requirements section
(in the furnace Installation instructions) for more details.
• A direct vent residential
†
single-story dwelling type
installation, for which ductwork can be attached to the
cottage base.
CB-200A Cottage Base
IMPORTANT SAFETY INFORMATION
These instructions are primarily intended to assist
qualified individuals experienced in the proper servicing
of heating and air conditioning appliances. Some local
codes require licensed installation / service personnel for
this type equipment. Use of this kit must be in accordance
with these instructions and with all applicable national
and local codes and standards.
WARNING:
Failure to properly install the furnace, base
assembly, and venting system as described herein
may damage the equipment and/or the home, create
a fire or asphyxiation hazard, and violates U.S.
listing requirements, and will void the warranty.
• Theinformationshownintheseinstructionsmustbefollowed
during the installation of this kit. Unqualified individuals
should not attempt to interpret these instructions or install
this equipment. If you do not possess mechanical skills or
tools, call your local dealer for assistance.
Figure 1. CMF / CMF2 / CMF95 Cottage Base Installation
Combustion Air Grill
(Both Sides)
To make opening
for register, cut
along outside
of dimples.
18” x 7”
(3 Openings)
10 1/2”
18 1/2”
24 1/4”
1 1/4”
2 1/4”
(TYP.)
2 7/8
Dia.”
1 1/2”
2 1/2”
57”
24 1/4”
Return Air Grill
and Filter
2 3/4”
7”
18” x 7”
(3 Openings)
10 1/2”
18 1/2”
24 1/4”
1 1/4”
2 1/4”
(TYP.)
2 7/8
Dia.”
1 1/2”
2 1/2”
57”
24 1/4”
Return Air Grill
and Filter
CMF / CMF2
Series Furnace
CMF95 Series
Furnace
Top Opening
24 1/8” x 24 1/8”
Top Opening
24 1/8” x 24 1/8”
8 7/8”
8 7/8”
• Usecautionwhenremovingcomponentsorhandlingthis
product. Personal injury can occur from sharp metal edges
present in all sheet metal constructed equipment.
FRONT BACK SIDES TOP
VENT PIPE
(CMF / CMF2
Minimum
Clearance
36 3 2 17 9
* CMF / CMF2 rear clearance may be zero inches, but vent clearance
will then be reduced to 6 inches. Refer to the NFPA for requirements to
achieve 6 inch vent clearance.
** The minimum clearance to the warm air registers of the cottage base must
be 36 inches. Use a blank off panel (#100427) to replace register when
clearance is less than 36 inches.
Table 2. Minimum Clearances to Adjacent Materials
TYPE OF
INSTALLATION
DUCTED
APPLICATION
DIRECT
VENT
SYSTEM
REQUIRED ‡
FLUE PRODUCTS
EXHAUSTED BY
CMF / CMF2
Residential
†
Ye s Ye s
NORDYNE SRJ
Roof Jack or an
Existing Chimney**
CMF / CMF2
Residential
†
No No*
NORDYNE SRJ
Roof Jack or an
Existing Chimney**
CMF95 Ye s Ye s PVC Vent
† Residential is only defined herein as a non-manufactured housing single-
story dwelling type application.
‡ A direct vent system is one that draws the combustion air directly from
outside the home through an air pipe.
* In some installations, a direct vent system must be used. Refer to the
Combustion and Ventilation Air Requirements section of the furnace's
installation instructions.
** For more information about properly venting this appliance through an
existing chimney, refer to the Venting Requirements section in the chimney
kit manual or the furnace's installation instructions.
Table 1. Cottage Base Installation Requirements
BASE INSTALLATION WITHOUT
DUCTWORK ATTACHED
Conditioned Air Distribution
This type of installation must not have ductwork attached to
the cottage base or use the cottage base as a plenum for
ductwork. The conditioned air must be distributed to the room
by the registers of the cottage base. NOTE: The front register
is not adjustable and remains fully open.
Combustion Air for the CMF / CMF2 Furnace
The combustion air may be drawn directly from the conditioned
space using the side panel grilles, as shown in Figure 1.
However, some installations require a direct vent system.
Refer to the “Combustion and Ventilation Air Requirements”
section (in the furnace Installation instructions) for more details.
Combustion Air for the CMF95 Furnace
Combustion air for the CMF95 furnace is drawn directly from
outside the home. Refer to the CMF95 Installation Instructions
for other installation configurations and requirements.
Unit Location and Clearances to Adjacent
Material Requirements
• The unit must be installed in a level position.
• The base should be located on a hard surface. When
the furnace location is carpeted, a hard surface platform
underneath the cottage base must be used.
• The unit may be located in a corner or with the rear of the
unit against an open wall, as shown in Figure 2 and Figure
3.
• The furnace and cottage base must be installed with the
minimum clearances from adjacent materials as stated in
Table 2. NOTE: Additional clearance should be provided
to permit servicing of filters, blower, motors, controls,
combustion air connections, and vent connections.
Combustion Air Grille Installation
(CMF / CMF2 Only)
1. Locate the four dimples in each side panel.
2. In each side panel, cut out the rectangle created by the
outside of the dimples, as shown in Figure 1. The approximate
location and size of the rectangular area to be cut out is
shown in Figure 1.
3. Secure the grilles to the side panels using the self-drilling
fasteners provided with the kit.
4. Remove the hose clamp that secures the flexible hose to
the burner. Remove the hose from the unit and discard.
NOTE: The open area of the grille should not be restricted
or blocked.
How to Install the CMF / CMF2 furnace on the
CB-200A Base
1. Position the CB-200A cottage base in the desired location,
and in accordance to the minimum clearances to adjacent
materials listed in Table 2.
2. Set the furnace on the cottage base without damaging the
foam gasketing material on the base to as shown in Figure
1. NOTE: Make sure that the furnace is seated on the back
of the base.
3. Fasten the front of the furnace to the base with self tapping
screws provided in the kit.
Improperly designed ductwork could result in noisy operation,
nuisance cycling, and other related problems.
• The furnace and cottage base must be installed with the
minimum clearances from adjacent materials as stated in
Table 2. NOTE: Additional clearance should be provided
to permit servicing of filters, blower, motors, controls,
combustion air connections, and vent connections.
How to Install the CMF Series Furnace on the
CB-200A Base
1. Position the CB-200A cottage base in the desired location,
which must abide by the minimum clearances to adjacent
materials detailed in Table 2.
2. Set the furnace on the cottage base without damaging the
foam gasketing material on the base top. NOTE: Make sure
that the furnace is seated on the back of the base.
3. Fasten the front of the furnace to the base with the self
tapping screws provided in the kit.
4. Attach the ductwork to the cottage base.
Normal Installation
(Both side registers open)
Reduced Clearance Installation
(Refer to NFPA for additional info)
Corner Installation
(One register Closed off)
Figure 3. CMF95 Furnace Installations (Without Ductwork)
Figure 2. CMF / CMF2 Furnace Installations (Without Ductwork)
Normal Installation
(Both side registers open)
Reduced Clearance Installation
(Refer to NFPA for additional info)
Corner Installation
(One register Closed off)
BASE INSTALLATION WITH
DUCTWORK ATTACHED
Combustion Air
This type of installation must use a direct vent system. For
proper installation of the direct vent kit, follow the instructions
provided with that kit. The combustion air opening of the direct
vent kit must not be restricted or blocked.
Conditioned Air Distribution
• The unit must be installed in a level position.
• The base should be located on a hard surface. When
the furnace location is carpeted, a hard surface platform
underneath the cottage base must be used.
• The ductwork must be designed and installed in accordance
with all applicable local codes and NFPA 90B (Standard for
Installation of Residence Type Warm Air Heating and Air
Conditioning Systems).
• The ductwork must be properly sized for the airflows listed
in Table 3 at the given the external static pressures (ESP).
707792A (Replaces 7077920)
Specifications & illustrations subject to change without notice or incurring obligations (06/15).
O’Fallon, MO, © Nortek Global HVAC LLC 2015. All Rights Reserved.
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Broan CB-200A Cottage Base Installation guide
- Type
- Installation guide
Broan CB-200A Cottage Base is designed for use with a CMF series furnace and can be used in two different installations:
- A residential† single-story dwelling type installation, for which no ductwork can be used. In some special cases, a direct vent system‡ is required for this type of installation.
- A direct vent residential † single-story dwelling type installation, for which ductwork can be attached to the cottage base.
The Combustion Air for the CMF / CMF2 Furnace may be drawn directly from the conditioned space using the side panel grilles.
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