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INTRODUCTION
Models
FEM4P,
FSM4P,
and
FSU4P
are
for
R-410A
refrigerant.
Models
FEM4P
and
FSM4P
are
designed
for
maximum
flexibility
and
can
be
used
for
upflow,
horizontal
left
or
right,
and
downflow
applications
(accessory
kit
required
for
downflow).
Model
FSU4P
is
designed
for
upflow
installation,
and
can
be
field
modified
for
downflow
applications
(accessory
kit
required).
LOCATION
FEM4P
models
are
available
for
system
sizes
1-1/2
-
4
tons
(18,000
-
48,000
BTUH)
nominal
cooling
capacity.
FEMA4P
uses
a
refrigerant
piston
metering
device
with
an
ECM
integral
electronically
commutated
motor
for
efficiency.
FSM4P
and
FSU4P
models
are
available
for
system
sizes
1-1/2
-
4
tons
(18,000
-
48,000
BTUH)
nominal
cooling
capacity.
FSM4P
and
FSU4P
use
a
refrigerant
piston
metering
device
with
2-speed
PSC
(permanent
split
capacitor)
motors.
All
models
require
a
field
supplied
air
filter.
Factory
approved
electric
heater
packages
are
available
in
sizes
5kW
through
30kW.
See
Product
Specification
literature
for
available
accessory
kits
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
duct
work.
See
Clearances
in
Figure
1
and
Figure
2.
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
is
recommended.
NOTE:
Internal
filter
can
be
accessed
from
separate
filter
door.
If
the
filter
can
NOT
be
easily
accessed,
a
remote
filter
is
recommended.
Refer
to
ACCA
Manual
D for
remote
filter
sizing.
7
aN
Le
FIRE
HAZARD
Failure
to
maintain
proper
clearances
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
inches
of
the
supply
end
of
the
fan
coil.
496
01
5501
01
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