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Check Vertical Separation
If there is any vertical separation between the indoor and out-
door units, check to ensure that the separation is within allow-
able limits. Relocate equipment if necessary.
Provide Safety Relief
If local codes dictate an additional safety relief device, pur-
chase locally and install locally. Installation will require the re-
covery of the factory shipping charge before the factory tubing
can be cut and the supplemental relief device is installed.
Refrigerant Line Sizing
Consider the length of the piping required between the outdoor
and indoor units. The maximum allowable line length is 100 ft
(30.5 m). See Table 5. Refrigerant vapor piping should be
insulated.
Risers in Heat Pump Piping Systems
Elevation differences between the outdoor unit and the indoor
unit in heat pump systems will create two riser line conditions
– one in the liquid line in one mode and one in the vapor line in
the opposite mode. See the following table to identify which
lines are risers in this installation.
575J UNIT
BELOW ID UNIT
MODE
Cooling
Heating
(Discharge Gas)
LIQUID LINE RISER
Refer to Piping Recommendations, Table 5; observe Max Lift
limits for liquid line according to unit mode, equivalent line
length and pipe size.
VAPOR LINE RISER
Refer to Table 6 for maximum pipe size in single pipe vapor
risers. All pipe size recommendations in Piping Recommenda-
tions, Table 5, satisfy these maximum vapor line sizes. If this
installation is re-using existing piping, check the vapor line siz-
es against these maximum values; replace riser sections with
these pipe sizes if necessary.
LIQUID LINE SIZE (in.)
3/8
1/2
5/8
575J UNIT
ABOVE ID UNIT
Riser in
Riser in
Vapor
Liquid
(Suction Gas)
Vapor
Liquid
Table 8 — Refrigerant Specialties Part Numbers
LIQUID LINE SOLENOID VALVE (LLSV)
EF680033 plus EF680039 biflow kit
EF680035 plus EF680039 biflow kit
EF680036 plus EF680039 biflow kit
Table 6 — Maximum Vapor Line Sizes
575J* UNIT
07G/H
08M/N
12G/H
Install Filter Drier and Moisture Indicator
Every unit MUST have a bi-directional filter drier in the liquid
line. Locate the filter drier(s) at the indoor unit, close to the in-
door coil's thermostatic expansion valve (TXV) inlets. The
575J units include one Puron-duty filter drier, shipped in car-
tons attached to the unit basepan. Remove the filter drier and
prepare to install in the liquid line at the indoor coil. Do not re-
move connection fitting plugs until ready to connect and braze
the filter drier into the liquid line position. See Table 7.
IMPORTANT: A refrigerant receiver is not provided with
the unit. Do not install a receiver.
Installation of liquid line moisture indicating sight glass in
each circuit is recommended. Locate the sight glass(es) be-
tween the outlet of the filter drier and the TXV inlet.
Refer to Table 8 for recommendations on refrigeration special-
ties.
Select the filter drier for maximum unit capacity and minimum
pressure drop. Complete the refrigerant piping from the indoor
unit to the outdoor unit before opening the liquid and vapor
service valves at the outdoor unit.
Table 7 — Puron-Duty Filter Drier(s)
LIQUID
UNIT
QTY
LINE OD
575J*07G/H
1
575J*08M/N
1
575J*12G/H
1
SOLENOID COIL
EF680037
EF680037
EF680037
10
575J UNIT
575J UNIT
BELOW ID UNIT
ABOVE ID UNIT
Max Diameter, Single Pipe (in.)
1-1/8
1-1/8
1-3/8
1-5/8
1-3/8
1-3/8
DESSICANT
PART NO. REF.
VOLUME
3/8 in.
8 cu. in.
KH43LS088
1/2 in.
16 cu. in.
KH43LS102
1/2 in.
16 cu. in.
KH43LS102
SIGHT GLASS
FILTER DRIER
KM680008
Provided with unit See
KM680004
Table 7
KM680005
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