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Figure
2
Adapters
for
Coils
Wider
or
Narrower
than
Furnace
or
Air
Handler
NARROWER
COIL
3”
MIN.
:
WIDER
FURNACE
!
ADAPTER
(FIELD
SUPPLIED)
ADAPTER
(2)
(FIELD
SUPPLIED)
NARROWER
FURNACE
NOTE:
When
coil
is
used
in
a
heat
pump
application
with
electric heat,
coil
must
be
installed
upstream
of
the
electric
heater
(refer
to
Figure
3).
This
prevents
electric
heat
from
driving
up
refrigeration
system
pressure
during
heating
cycle.
NOTE:
When
coil
is
installed
to
a
gas
or
oil
furnace,
coil
must
be
installed
downstream
of
the
furnace
heat
exchanger
(refer
to
Figure
4).
This
reduces
condensate
formation
in
the
furnace
heat
exchanger
during
the
cooling
cycle.
When
the
gas
or
oil
furnace
is
in
downflow
application
on
a
combustible
floor,
Sub-Base
accessory
must
be
installed
between
coil
and
floor.
Refer
to
Product
Specification
literature
for
accessory
part
number.
NOTE:
When
coil
is
installed
with
a
Heat
Pump
in
conjunction
with
a
fossil
fuel
heating
system,
a
Fossil
Fuel
Kit
must
be
used.
Refer
to
Product
Specification
literature
for
kit
part
number.
NOTE:
On
furnace
installations
where
the
coil
is
located
in
an
unconditioned
space,
nuisance
sweating
may
occur
in
the
area
around
the
cabinet
to
supply
duct
joint.
Wrap
the
joint
between
the
cabinet
and
the
supply
duct
with
a
6”
wide
piece
of
insulation
with
vapor
barrier.
Figure
3
Heat
Pump
Coil
Position
Relative
to
Electric
Heat
UPFLOW
POSITION
DOWNFLOW
POSITION
(
J
ELECTRIC
HEATER
BLOWER
BLOWER
bse)
ELECTRIC
HEATER
HORIZONTAL
LEFT
POSITION
©
eo
Qo
ELECTRIC
HEATER
BLOWER
HORIZONTAL
RIGHT
POSITION
BLOWER
ELECTRIC
HEATER
38-20-19a
484
01
3001
03
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