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REFRIGERANT LINE CONNECTIONS
The coil is under pressure and TXV screen is
in place behind liquid line plug. DO NOT
the suction line plug first to depressurize
the coil.
NOTE: Factory nitrogen charge may escape
past rubber plugs during storage. This does
not indicate a leaking coil nor warrant return
of the coil.
Size and install refrigerant lines according
to information provided with outdoor unit.
Coil connection tube sizes are shown in
table below.
Route refrigerant lines to the coil in a
manner that will not obstruct service access
to the unit or removal of the filter.
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.
CAUTION
property damage.
do not come in direct contact or allow for
Dissimilar metals can cause galvanic
Page 10
CONNECT REFRIGERANT, LIQUID,
and SUCTION LINES
For matched and mismatched systems, use line
sizes recommended in outdoor unit Installation
Instructions. Adaptors are supplied with the
outdoor unit as per table below. The
adapters are to be installed on the outdoor
unit connections.
The coil can be connected to outdoor units
using 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.
See Table for coil connection tube size.
1. Remove cabinet access door.
2. Remove rubber plugs, suction plug then
liquid plug, from coil stubs using a pulling
and twisting motion. Hold coil stubs steady
to avoid bending or distorting.
3. Remove tubing plate with rubber
grommets and slide plate with grommets
onto the refrigerant lines (field line-set),
away from braze joints.
4. Fit refrigerant lines into coil stubs. Wrap a
heat sinking material such as a wet cloth
behind braze joints.
5. Use 1/2 psig Nitrogen purge in the suction
and out the the liquid line.
6. Braze using a Sil-Fos or Phos-copper alloy.
Do not use soft solder.
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