International Comfort Products MF08B1500B1, MF12F1900B1, MF16J2200B1, MF20L2400B1 Installation Manual
INSTALLATION INSTRUCTIONS
Modular Blower (Electric Furnace)
MF08B1500B1, MF12F1900B1, MF16J2200B1, MF20L2400B1
These instructions must be read and understood completely before attempting installation.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words DANGER, WARNING, CAUTION, and
NOTE are used to identify levels of hazard seriousness.
The signal word DANGER is only used on product labels
to signify an immediate hazard. The signal words
WARNING, CAUTION, and NOTE will be used on
product labels and throughout this manual and other
manuals that may apply to the product.
DANGER -- Immediate hazards which will result in
severe personal injury or death.
WARNING -- Hazards or unsafe practices which could
result in severe personal injury or death.
CAUTION -- Hazards or unsafe practices which may
result in minor personal injury or product or property
damage.
NOTE -- Used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
TABLE OF CONTENTS
General Information/Installation 2..................
Installation 2.....................................
Vertical/Horizontal Installation 3....................
Ductwork Connection 4...........................
Filter Installation 4................................
Electrical Connection 4...........................
Blower Performance 8............................
Sequence of Operation 9..........................
Wiring Diagram 10...............................
Replacement Parts 12............................
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
WARNING
!
The signal word CAUTION is used throughout
this manual in the following manner:
!
Signal Words on Product Labeling
Signal words are used in combination with colors and/
or pictures on product labels.
!
ELECTRICAL SHOCK HAZARD
Failure to turn off electric power could result in personal injury or death.
Before installing or servicing system, turn off main
power to the system. There may be more than one disconnect switch, including accessory heater(s).
WARNING
CAUTION
WARNING
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MODULAR BLOWER: MFINSTALLATION INSTRUCTIONS
Figure 1
Low Voltage
Entrance
15w (2--22 Ton)
194 (3--32 Ton)
22d (4 Ton)
242 (5 Ton)
Nominal Installation Dimensions and Clearances
14a (2 -- 22 Ton)
17d (3 -- 32 Ton)
212 (4 Ton)
238 (5 Ton)
3/4”
8
Line Voltage
Entrance
ALL DIMENSIONS IN INCHES
1IN=25.4MM
12”
1
/2”
24”
1
20
/2”
NO HEATERS
All Sides 0”..................................
From Supply Duct 0”..........................
Recommended Service From Front 20”(508 mm)..........
(Service for blower, filter if installed)
WITH HEATERS
All Sides 0”..................................
From First Three Feet of Supply Duct
5/8”
to Combustibles 1”...........................
From Duct after Three Feet 0”.................
Recommended Service From Front 20” (508mm)..........
(Service for blower, heaters if installed)
CLEARANCES
!
FIRE HAZARD
Failure to follow this warning could result in
personal injury, death, and/or property damage.
When heaters are installed maintain clearances
from combustible materials as specified on unit
rating plate. Do not use plastic lined or combustible
flexible ducting within 36’’ (914 mm) of the supply
end of the modular unit.
GENERAL INFORMATION
!
PERSONAL INJURY, AND/OR PROPERTY DAMAGE
HAZARD
Failure to carefully read and follow this warning
could result in personal injury, death, equipment
malfunction, and/or property damage.
The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the
proper tools and test instruments.
Installation must conform with local building codes
and with the National Electrical Code NFPA70 current edition.
INTRODUCTION
The MF modular blower cabinet uses a 208/230V PSC blower
motor, with an electronic fan control board. The MF may be used
for cooling or heat pump applications either with or without electric
heat. Installations without electric heat require a NO HEAT KIT
(EHIA00KN10). The cabinet can be installed in an upflow,
downflow or horizontal position. Refer to Figure 3 and 4.
LOCATION
Select the best position which suits the installation site conditions.
The location should provideadequatestructural support, space in
the front of the unit for service access, clearance for return air and
supply duct connections, space for refrigerant piping connections
and condensate drain line connections. If heaters are being
WARNING
installed, make sure adequate clearance is maintained from
supply ductwork, See Clearances and Warning in Figure 1.
If the unit is located in an area of high humidity, nuisance sweating
of casing may occur. On these installations a wrap of 2” (51mm)
fiberglass insulation with a vapor barrier should be used.
HEATER PACKAGES
Factory approved, field installed, UL listed heater packages are
available from the equipment supplier. See unit rating plate for a
list of factory approved heaters (electric heat accesso ry models
EHIA only). Heaters that are not factory approved could cause
damage which would not be covered under the equipment
warranty.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal
injury .
Sheet metal parts may have sharp edges or burrs.
Use care and wear appropriate protective clothing
and gloves when handling parts.
INSTALLATIONS
The unit is ready to install in any position without modifications.
Refer to the co il instructions for information on drain pan
configurations etc. Make sure coil is set up properly for desired
position of blower cabinet.
Coil must be secured to blower cabinet with the three tabs that are
part of the blower cabinet base. Bend the tabs out from the bottom
so they fit over the coil cabinet.
Position coil cabinet in relation to the blower so they will be correct
for desired application.
2
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MODULAR BLOWER: MF
INSTALLATION INSTRUCTIONS
For upflow and horizontal applications apply foam seal strip
around top of coil cabinet. For downflow application apply foam
seal strip around bottom of coil cabinet. Set blower on top of coil
cabinet so they are flush. Secure cabinets together using the
three tabs on the bottom of the cabinet. Bend the tab out from the
bottom so it fits over the coil cabinet. If no pilot holes are present,
drill a hole as required for a screw.
Figure 2
Attach Coil to Blower Cabinet
Panels removed
for clarity only
Place seal
on top of
Coil Cabinet
Low
voltage
around
perimeter
wiring
splice box
Bend Tabs (both sides
and back) on Bottom of
Blower Cabinet to Fit
over Coil Cabinet
DOWNFLOW INSTALLATIONS
Refer to instructions with Subbase Kit.
NON-DUCTED RETURN AIR CLOSET
INSTALLATION
Thecabinetcanbeinstalledinaclosetwithafalsebottomtoform
a return air plenum, or mounted on an open platform inside the
closet. Platform should be high enough to provide a free (open)
area for adequate return airflow into the bottom of the cabinet.
The open area can be on the front side or a combination of front
and sides, providing there is clearance on the sides between
cabinet and closet.Refer to ACCA Manual D for sizing and free
area recommendations.
NOTE: Local codes may limit application of systems without a
ducted return to single story dwellings.
HORIZONTAL LEFT AND RIGHT
INSTALLATIONS
The modular blower cabinets can be installed in either downflow,
horizontal left, or horizontalrightapplications. When a coil cabinet
is applied, refer to the coil installation manual for proper drain pan
and airflow requirements. They must have the drain pan
repositioned for right hand airflow. Refer to coil installation
manual.
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
A field fabricated auxiliary drain pan, with a separate
drain is REQUIRED for all installations over a finished living space or in any area that may be damaged by overflow from a restricted main drain pan.
In some localities, local codes require an auxiliary
drain pan for ANY horizontal installation.
CAUTION
Figure 3
Airflow Positions
Subbase
Accessory
Figure 4
Airflow Positions
SUSPENDED CABINET INSTALLATION
1. The cabinet may be supported on a frame or shelf, or it may
be suspended.
2. Use metal strapping or threaded rod with angle iron
supports under the auxiliary drain pan to suspend cabinet.
These supports MUST run parallel with the length of the
cabinet. Refer to Figure 5.
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3
MODULAR BLOWER: MFINSTALLATION INSTRUCTIONS
3. Ensure that there is adequate room to remove service and
access panels after installing supporting brackets.
4. Place field installed vibration isolators in auxiliary drain pan
to support cabinet.
DUCT CONNECTIONS
Supply Duct
Supply duct must be attached to the outside of flange on outlet
end of unit. Flexible connectors may be used if desired. Maintain
clearances from supply duct to combustibles when heaters are
installed. Refer to Figure 1 and unit rating plate.
Return Duct
Return duct should be attached to bottom of unit using sheet
metal screws or other fasteners.
FILTER INSTALLATION
Filters must be field supplied. A remote filter grille or other means
must be provided. Refer to ACCA Manual D for remote filter
sizing.
Figure 5
Supports MUST run parallel with blower cabinet
Horizontal Installation
See Note
Below
Refrigerant
Lines
Vibration
Isolators
Field-Fabricated
Drain Pan
Drain
Lines
Figure 6 Fan Control Board
All electrical work MUST conform with the requirements of local
codes and ordinances and the National Electrical Code NFPA 70
current edition.
The low voltage transformer and the fan control are standard on
all models and are prewired at the factory. Line voltage
connections are made to the heater accessory or the lugs on the
No Heat Kit.
OVERCURRENT PROTECTION
The power supply wiring to the unit MUST be provided with
overcurrent protection. Governing codes may require this to be
fuses ONLY or circuit breakers.
For blower cabinets without heaters, a 15 amp circuit may be
used.
Before proceeding with electrical connections, make certain that
supply voltage, frequency, phase, and circuit ampacity are as
specified on the unit rating plate. See unit wiring label for proper
field high and low voltage wiring. Make all electrical connections
in accordance with the NEC and any local codes or ordinances
that may apply. Use copper wire only. The unit must have a
separate branch electric circuit with a field--supplied disconnect
switch located within sight from and readily accessible from the
unit.
NOTE: When a pull--out type disconnect is removed from the unit,
only the Load side of the circuit is de--energized. The Line side
remains live until the main (remote) disconnect is turned off.
NOTE: If increased structural strength is needed in the horizontal position, use field supplied two connecting plates in
place of the tabs on the bottom of the blower.
ELECTRICAL CONNECTIONS
The MF modular blower utilizes an electronic fan control board
which has a low voltage circuit protective fuse (5 AMP), and pigtail
connections for thermostat hook up. The fan control also has a
relay for blower operation, and built in 90 second blower--off time
delay relay (TDR). To disable the TDR feature, snip the jumper
wire JW1. Refer to Figure 6.
4
!
ELECTRICAL SHOCK or UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury, death, and/or property damage.
If a disconnect switch is to be mounted on unit,
select a location where drill and fasteners will not
contact electrical refrigeration components.
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