Installation guide
24”
(610)~
MFO8
&
MF12
Line
Voltage
25”
(635)~
MF16
&
MF20
Entrance
A
|
a
14-3/16”
(360)-
MFO8
,
.
NA
20%”
17-112"
(445)~
MF12
~
IL
(821)
24”
(533)~
MF16
Oo
a
a
24-1/2”
(622)-
MF20
a
a
se
Figure
1
Nominal
Installation
Dimensions
and
Clearances
-
in(mm)
CLEARANCES
12-7/16”
(316)-
MFO8
15-3/4”
(400)~
MF12
19-1/4”
(489)-
MF16
NO
HEATERS
22-3/4”
(578)~
ME20
All
Sides...0
a
From
Supply
Duct...0"
3/4"
(19)
Recommended
Service
From
Front...20"(508
mm)
Low
Voltage
|
(Service
for
blower,
filter
if
installed)
Entrance
el
~
P
$
WITH
HEATERS
All
Sides...0"
From
First
Three
Feet
of
Supply
Duct
to
Combustibles...1"
(25mm)
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.
GENERAL
INFORMATION
JWT
e
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
healt.
Installations
without
electric
heat
require
a
NO
HEAT
KIT
(EHIAOOKN10).
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,
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.
IN
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.
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