Hoshizaki DCM-751BWH(-OS), DCM-751BAH(-OS) DCM-751BWH-OS, Connection to an Open Drain System, Fig

2. Water-Cooled Condenser

a) Connection to an Open Drain System

•Condenser water supply inlet is 1/2" female pipe thread (FPT). A minimum of 1/4" nominal

ID copper water tubing or equivalent is required 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 1/4" nominal ID hard pipe or equivalent is required for the condenser drain line.

•In some areas, a back flow preventer may be required in the condenser water supply line.

•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).

Icemaker

Icemaker Water

Supply Inlet

1/2" FPT

Minimum 1/4" Nominal ID

Copper Water Tubing

Icemaker Water Supply

Line Shut-Off Valve

Condenser Drain Outlet

Icemaker Water Supply

Storage Bin

3/8" FPT

Vent

Line Drain Valve

Drain Outlet

3/4" FPT

Drip Tray

Drain Outlet

3/4" FPT

Stand

Vent Tube

Tube

Condenser Water Supply

Line Shut-Off Valve

Condenser Water

Supply Line Drain Valve

Condenser Water
Supply Inlet
1/2" FPT	Separate piping to approved
	drain. Leave a 2-inch (5‑cm)
Minimum 1/4"	vertical air gap between the
	end of each pipe and the
Nominal ID Hard Pipe
	drain.

	2-inch (5-cm)
Minimum 3/4" Nominal ID	air gap
Hard Pipe

Fig. 5	DCM-751BWH(-OS)
	Connection to an Open Drain System

Floor Drain

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