Hoshizaki KM-2500SWH3 Instruction Manual page 19

• Condensation drain outlet is a 3/8" OD stainless tube. The icemaker and condensation
drain line(s) must be run separately from the storage bin drain line.
• Drain lines must have 1/4" fall per foot (2 cm per 1 m) on horizontal runs to get a good
flow. A vented tee connection is also required for proper flow.
• Drain lines should not be piped directly to the sewer system. An air gap of a minimum of
2 vertical inches (5 cm) should be between the end of the drain pipes from the icemaker,
the condensation drain, the storage bin, and the water-cooled condenser (if applicable)
and the floor drain.
2. Water-Cooled Condenser (if applicable)
a) Connection to a Potable Water Supply.
• Water supply inlet is 1/2" female pipe thread (FPT). A minimum of 3/8" OD copper tubing
is recommended for the water supply line.
• A water supply line shut-off valve and drain valve should be installed.
• Water supply pressure should be a minimum of 10 PSIG and a maximum of 113 PSIG. If
the pressure exceeds 113 PSIG, the use of a pressure reducing valve is required.
• Condenser drain outlet is 3/8" FPT. A minimum of 3/8" OD hard pipe is recommended for
the condenser drain line. Drain line must be run separately.
• Drain line must have 1/4" fall per foot (2 cm per 1 m) on horizontal runs to get good flow.
A vented tee connection is also required for proper flow.
• Drain line should not be piped directly to the sewer system. An air gap of a minimum of
2 vertical inches (5 cm) should be between the end of the drain pipe and the floor drain.
• In some areas, a back flow preventer may be required in the cooling water circuit.
b) Connection to a Closed Loop Water Supply.
• Water supply inlet is 1/2" female pipe thread (FPT). A minimum of 3/8" OD copper tubing
is recommended for the water supply line.
• Condenser return outlet is 3/8" FPT. A minimum of 3/8" OD hard pipe is recommended for
the condenser return line.
• Shut-off valves and drain valves should be installed at both the condenser inlet and
condenser return outlet.
• Water supply pressure should be a minimum of 10 PSIG and a maximum of 113 PSIG.
The water supply to the condenser should not drop below 4 GPM.
• The pressure differential between the inlet and outlet water lines must be no less than
10 PSIG.
• When using a glycol blend, the solution mixture should be less than 30% glycol.
• In order to maintain the proper high side pressure, the water inlet temperature should not
drop below 45°F (7°C) and the water outlet temperature must be in the 104°F to 115°F
(40°C to 46°C) range. Once the icemaker installation is complete, confirm the outlet
temperature 5 minutes after a freeze cycle starts. If the outlet temperature is not in the
proper range, adjust the water-regulating valve to bring it into range.
19