Hoshizaki KM-1400SWH/3-M User Manual

15

a) Connection to an Open Drain System
• Condenser water supply inlet is 1/2" female pipe thread (FPT). A minimum of 3/8" nominal 

copper water tubing is recommended for the condenser water supply line.

• A condenser water supply line shut-off valve and drain valve should be installed.
• Condenser drain outlet is 3/8" FPT. A minimum of 3/8" nominal hard pipe is recommended 

for the condenser drain line.

• In some areas, a back flow preventer may be required in the cooling water circuit.
• In order to maintain the proper high side pressure, the condenser water supply inlet 

temperature should not drop below 45°F (7°C) and the condenser drain 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 condenser drain outlet temperature 5 minutes after a freeze 
cycle starts. If the condenser drain outlet temperature is not in the proper range, use a 
flat blade screwdriver to rotate the adjustment screw on the water-regulating valve until 
the temperature is in the proper range (rotate counterclockwise to raise temperature or 
clockwise to lower temperature).

Separate piping to approved drain. 

Leave a 2-inch (5-cm) vertical air 

gap between the end of each pipe 

and the drain.

Icemaker Water Supply Line 

Shut-Off Valve

Icemaker Water Supply Line 

Drain Valve

Icemaker

Icemaker 

Water Supply 

Inlet

1/2" FPT

2-inch (5-cm) air gap

Floor Drain

Icemaker

Drain Outlet 

3/4" FPT

Bin

Condenser Water Supply Line 

Shut-Off Valve

Condenser Water Supply Line 

Drain Valve

Condenser Water 

Supply Inlet

1/2" FPT

Condenser 

Drain Outlet 

3/8" FPT

Condensation 

Drain Outlet

3/8" OD Hard Tube

Minimum 1/2" Nominal Copper Water Tubing

Vent Tube

Vent Tube

Minimum 

3/4" Nominal 

Hard Pipe

Minimum 3/8" Nominal 

Hard Pipe

Minimum 3/8" Nominal Copper Water Tubing

Bin Drain Outlet

See Manufacturer's Instructions