ICP MF080014C, MF120017C, MF160021C, MF200024C Installation Guide
These instructions must be read and understood completely before attempting installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical shock,
or other conditions which may cause death, personal injury, or
property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The
qualified installer or agency must use factory-authorized kits or
accessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in
literature and attached to the unit. Consult local building codes,
the current editions of the National Electrical Code (NEC) NFPA-
70.
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 ........................................................ 10
Wiring Diagram .................................................................... 11
Replacement Parts .............................................................. 12
In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1 Recognize safety information.
This is the safety-alert symbol Z_. When you see this symbol on
the unit and in instructions or manuals, be alert to the potential
for personal injury. Understand these signal words; DANGER,
WARNING, and CAUTION. These words are used with the
safety-alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices
which may result in minor personal injury or product and property
damage. NOTE is used to highlight suggestions which will result
in enhanced installation, reliability or operation.
ELECTRICALSHOCK 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}.
April 2012 Specifications subject to change without notice. X40159 Rev.C
Figure i Nominal Installation Dimensions and Clearances-in(ram)
12-7/16" (316/- MF08
15-3/4" (400)- MF12
19-1/4" (489)- MF16
22-3/4" (578)- MF20
Low Voltage
Entrance
14-3/16" (360/- MFO8
17.112" (445/- MF12
21" (533/- MF16
24-1/2" (622/- MF20
314" (19)
Line Voltage | 24" (610)- MFO8 & MF12
Entrance l 25" (635)- MF16 & MF20
GENERAL INFORMATION
DEATH, PERSONAL INJURY, AND/OR PROPERTY DAMAGE
HAZARD
Failure to carefully read and follow this warning could result
in equipment malfunction, property damage, personal injury
and/or death.
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 provide adequate structural 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 installed,
CLEARANCES
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...O"
From First Three Feet of Supply Duct
to Combustibles...1" (25ram)
From Duct after Three Feet...0"
Recommended Service From Front...20" (508mm)
(Service for blower, heaters if installed)
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.
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 accessory models EHIA
only). Heaters that are not factory approved could cause damage
which would not be covered under the equipment warranty.
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.
INSTALLATION
The unit is ready to install in any position without modifications.
Refer to the coil 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 Specifications subject to change without notice. X40159 Rev.C
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.
Figuie 2
AttachCoil to BlowerCabinet
Panelsremoved
for clarity only
Placeseal
on topof
CoilCabinet
around
perimeter
DOWNFLOW INSTALLATIONS
Refer to instructions with Subbase Kit.
NON-DUCTED RETURN AIR CLOSET
INSTALLATION
The cabinet can be installed in a closet with a false bottom to form 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 horizontal right applications. 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.
Airflow Positions
J
Subbase
Accessory
F-
I'EA"I_J_
4
Figure4 J Airflow Positions
i
t
4
SUSPENDED CABINET INSTALLATION
1. The cabinet may be supported on a frame or shelf, or it may be
suspended.
I
X40159 Rev.C Specifications subject to change without notice. 3
2. Usemetalstrappingorthreadedrodwithangleironsupports
undertheauxiliarydrainpantosuspendcabinet.Thesesupports
MUST run parallel with the length of the cabinet. Refer to Figure
5.
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 Horizontal Installation
see Note
Below
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.
Figure 6
Fan Control Board
, rnT
_ '\ / _ _ Refrigerant
....._ _\'_ \Lines
Vibration Field-Fabricated
Isolators
Supports MUST run parallel with blower cabinet
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 JWI.
Refer to Figure 6.
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.
DrainPan _-_-_
OVERCURRENTPROTECTION
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.
4 Specifications subject to change without notice. X40159 Rev.C
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