8
5) Use an electronic leak detector or soap bubbles to
check for leaks. Add a trace of refrigerant to the lines
through the Schrader access ports on the Parker quick
connect couplings (if using an electronic leak detector),
and then raise the pressure using nitrogen gas
(140 PSIG (10 bar)).
WARNING! DO NOT use R-404A
as a mixture with pressurized air for leak testing.
6) Evacuate through the Schrader access ports on the
Parker quick connect couplings and charge with
R-404A vapor to a pressure of 15 to 30 PSIG (1 to
2 bar).
7) Connect the refrigerant lines to the appropriate male
fittings on the remote condenser unit first and then at
the icemaker. Make a proper connection as follows:
a. Remove the protective covers from the male fitting
and female coupling.
b. Apply Polyol Ester (POE) refrigerant oil or Parker
Super O Lube to the entire male fitting, including
O-ring, diaphragm, and threads, before making the
connection. See Fig. 12.
CAUTION
Do not use thread sealant on the fittings. Use POE
refrigerant oil or Parker Super O Lube only.
c. Make sure the male fitting and female coupling are
properly aligned, then start the connection by hand
to ensure that it is not cross threaded.
d. Tighten the connection with a wrench until it is tight.
At this point, the nut has covered most of the threads
on the male fitting.
e. Mark a reference line on the female coupling and the
remote condenser unit or icemaker panel. Using a
backup wrench on the back of the female coupling,
tighten the six-sided nut of the female coupling an
additional 1/6 turn. See Fig. 13.
8) If the line set exceeds 66 feet (20 m), see "I.G.5 Line
Set Exceeding 66 Feet (20 m)" for proper charging of
the unit.
5. Line Set Exceeding 66 Feet (20 m)
CAUTION
The icemaker, line set, and remote condenser unit
must contain the same type of refrigerant. Mixing
of refrigerants will result in improper operation and
possible damage to the refrigeration system.
The maximum line length for the standard refrigerant
charge is 66 feet (20 m). Should an installation require a
longer line length, additional refrigerant must be added. Add
40 g of R-404A for each meter over 20 m to a maximum of
30.5 m. Your nearest Hoshizaki Service office (listed in the
Instruction Manual) is available for recommendations.
After weighing in the additional charge, mark the unit's
nameplate to show the new correct total refrigerant charge.
Fig. 11
Female Coupling
1/2" OD Discharge Line
(Insulated)
Remote Condenser Unit
3/8" OD Liquid Line
(Insulated)
Icemaker
Male Fitting
Service Loop
Fig. 12
Fig. 13
Backup
Wrench
Reference
Line
1/6
Turn
Wrench
Wrench
After Tight, Tighten an
Additional 1/6 Turn
Backup
Wrench
THREAD
SEALANT
Threads
Diaphragm
O-Ring
Brush
Male Fitting
DO NOT USE
THREAD SEALANT
POLYOL
ESTER
(POE) OIL
PARKER
SUPER
O LUBE
Apply POE Oil or
Parker Super O Lube
to Entire Male Fitting
Summary of Contents for KM-1301S J-E Series
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