Instruction Manual

508269B01 Issue 2217 Page 5 of 9
Refrigerant Line Connections
Line Sizes
The refrigerant line sets should be sized according to the
recommendations given in the outdoor unit installation
instructions. See Table 1 for sweat connection sizes. A
eld-provided adapter may be required to match line set
connections.
Model
Suction Line
Connection
Liquid Line
Connection
-24
-30
-36
3/4 inch
3/8 inch
-42
-48
-51
-60
7/8 inch
Table 1. Refrigerant Line Connections
Replacement Parts
If replacement parts are needed for the liquid line orice
housing or assembly, order kit 69J46. The kit includes:
• 10 - Brass nuts for liquid line assemblies
• 20 - Teon rings
• 10 - Liquid line orice housings
• 10 - Liquid line assemblies
Figure 6. Liquid Line Orice Kit (69J46) Components
TEFLON RINGS (20)
BRASS NUTS (10)
LIQUID LINE ASSEMBLIES
(INCLUDES STRAINER) (10)
LIQUID LINE ORIFICE HOUSINGS (10)
LIQUID LINE
ASSEMBLY
COPPER
TUBE
PISTON
RETAINER
STRAINER
Brazing Guidelines
Use a silver alloy brazing rod (5 or 6 percent silver alloy for
copper-to-copper connections or 45 percent silver alloy for
copper-to-brass or copper-to-steel connections).
Use AL822 Flux Cord Solder Stickers (catalog number
Y6331) for aluminum to aluminum joints.
Before making brazed connections, place a eld-provided
heat shield, such as a wet rag, against the unit cabinet and
around the piping stubs. The heat shield must be in place
to prevent heat damage during brazing. See Figure 7.
Figure 7. Brazing Refrigerant Lines
WATER-
SATURATED RAGS
PLACE A WET RAG AGAINST
COIL CABINET AND AROUND
THE SUCTION LINE
CONNECTION.
BRAZE CONNECTION. ALLOW
PIPE TO COOL BEFORE
REMOVING WET RAG.
1
2
Suction Line Connection
Use the following procedure to connect the suction line to
the indoor coil:
1. Remove rubber plug from the stubbed connection.
2. Position the properly sized refrigerant piping and
make the brazed connection following the brazing
guidelines.
3. Do not remove the water-saturated rags from the
cabinet and piping until the piping has cooled
completely.
Suction Line Equalizer Fitting
Remove the copper are seat bonnet if present from the
male equalizer line tting (see Figure 8).
When removing the are nut, ensure that the copper
are seal bonnet is removed as illustrated in Figure 8.
IMPORTANT
Figure 8. Suction Line Male Equalizer Line Fitting
Modications
SUCTION LINE
FLARE NUT
REMOVE AND DISCARD
FLARE SEAL BONNET IF
PRESENT
MALE BRASS EQUALIZER
LINE FITTING
FLARE SEAL CAP
OR