Hoshizaki KM-1900SWH/3 User Manual

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6) Evacuate through the Schrader access ports on the Parker quick connect couplings and 

charge with R-404A refrigerant vapor to a pressure of 15 to 30 PSIG.

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. 13.

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. 14.

8) If the line set exceeds 66 feet, see "II.G.5 Refrigerant Charge (Line Set Exceeding

66 Feet)" for proper charging of the unit.

Female Coupling

5/8" OD Discharge Line

(Insulated)

3/8" OD Liquid Line

(Insulated)

Male Fitting

Service Loop

Threads

Diaphragm

O-Ring

Brush

PARKER
 SUPER

O LUBE

Backup 

Wrench

Reference 

Line

1/6 

Turn

Wrench

Wrench

Backup 

Wrench