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l
Fig. 1 - CSPH
Coil
A06520
NOTE:
Models
with tin-plated
copper
coils ("T"
in the llth
position
of the model
number)
are installed
the same as standard
coils.
INSTALLATION
Step
1--Check
Existing
Ductwork
Inspect
the previously
installed
air distribution
system
for heating
to determine
its suitability
for cooling.
Existing
heating
ductwork
may
have
to be
modified
and
insulated
to provide
better
air
distribution
for cooling.
Step
2--Insulate
and Vaporproof
Duct
Externally
insulated
ductwork
must have an adequate
vapor
seal
for summer
operation.
This
is particularly
important
where
the
duct
is exposed
to high
humidity
conditions
in attics,
vented
crawl
spaces,
unconditioned
basements
and utility
rooms.
The
vapor
seal prevents
condensation
in the insulating
material
and
subsequent
loss of insulating
value.
Properly
installed
heating
supply
ducts
should
already
have
adequate
insulation
against
excessive
heat loss.
This
same
insulation
should,
therefore,
be
satisfactory
in the
summer
for
protection
against
heat
gain.
However,
depending
on
the
specific
installation,
it may
be
desirable
to add to the insulation.
Step
3--Install
Coil
in Supply
Air
Duct
NOTE:
For cooling-only
units,
coil can be installed
in either
airflow
direction.
Heat pump applications
require specific airflow
direction
to obtain
performance.
See Fig. 1.
1. When
the connecting
air supply
duct is smaller
than the
coil inlet opening,
construct
transition
piece so that vertical
and
horizontal
dimensions
of transition
piece
do not
increase
more than 30 ° angle.
If connecting
outlet duct is
smaller
than
outlet
opening
of coil,
limit
transition
to
maximum
of 45 ° angle.
2. Provide
at least 3 ft of straight
ductwork
preceding
coil
inlet.
3. Support
coil from floor
or suspend
it.
When coil is sus-
pended,
provide
adequate
hangers
to hold coil.
NOTE:
When
coil is installed
over a finished
ceiling
or living
area,
a secondary
condensate
pan
must
be
constructed
and
installed
under entire coil section.
Step
4--Connect
Refrigerant
Piping
Use
field-supplied,
refrigerant-grade
tubing
for connection
to
outdoor
units.
Suction
tube
must
be
insulated.
Do
not
use
damaged,
dirty,
or contaminated
tubing
because
it may
plug
refrigerant
flow-control
device.
ALWAYS
evacuate
the coil and
field-supplied
tubing before opening
outdoor
unit service valves.
Step
5--Connect
Refrigerant,
Liquid,
and
Suction
Lines
For
matched
and
mismatched
systems,
use
line
sizes
recommended
in outdoor
unit Installation
Instructions.
The
coil
can be connected
to outdoor
units
using
accesso U
tubing
packages
or field-supplied
tubing
of refrigerant
grade.
Always
evacuate
tubing
and reclaim
refrigerant
when
making
connections
or flaring
tubing.
Leak
check
connections
before
insulating
entire suction
line.
1. Remove
middle
cabinet
cover.
Remove
tubing cover
and
slide cover with grommets
onto the refrigerant
lines (field
line set), away from braze joints.
2. Remove
rubber
plugs from coil stubs using
a pulling
and
twisting
motion.
Hold coil stubs steady to avoid
bending
or distorting.
3. Wrap
TXV
and
nearby
tubing
with
a heat-sinking
material,
such as a wet cloth.
4. Fit refrigerant
lines into coil stubs.
Wrap
a heat-sinking
material,
such as a wet cloth, behind
braze joints.
5. Braze using a Sil-Fos
or Phos-Copper
alloy.
6. After brazing,
allow joints
to cool.
Slide tubing
plate with
rubber
grommets
over joints.
Position
tubing
at center of
each grommet
to ensure
an air seal around
the tube.
See Table 1 for coil connection
tube size.
Table
1 - ('oil Connection
Sizes
MODEL NUMBER
TONNAGE
CS(ER)HP2412A(C,T)A
2
CS(ER)HP3012A(C,T)A
2-I/2
CS(ER)HP3612A(C,T)A
3
CS(ER)HP4212A(C,T)A
3-1/2
CS(ER)HP4812A(C,T)A
4
CS(ER)HP6012A(C,T)A
5
COIL CONNECTION
TUBE SIZE (IN.)
LIQUID
SUCTION
3/8
5/8
3/8
3/4
3/8
3/4
3/8
7/8
3/8
7/8
3/8
7/8
UNIT
DAMAGE
HAZARD
Failure
to
follow
this
caution
may
result
in
product
damage.
To avoid damage
while brazing,
wrap tubing
or fitting with
a heat-sinking
material,
such a wet cloth.
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