Hoshizaki MWH KML-451MAH, MRH Water-Cooled Models, Connection to an Open Drain System

2. Water-Cooled Condenser a) KML-250/351/451MWH

(1) Connection to an Open Drain System

Condenser Water	Minimum Condenser	Condenser Drain	Minimum Condenser
Supply Inlet	Water Supply Line Size	Outlet	Drain Line Size
1/2" Female Pipe	1/4" Nominal ID Copper	3/8" Female Pipe	1/4" Nominal ID Hard Pipe
Thread (FPT)	Water Tubing or Equivalent	Thread (FPT)	or Equivalent

•A condenser water supply line shut-off valve and drain valve must be installed.

•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).

Icemaker Water

Supply Inlet

1/2" FPT

Condenser

Drain Outlet

3/8" FPT

Condenser Water

Supply Inlet

1/2" FPT

Vent Tube

Minimum 1/4" Nominal ID Copper

Water Tubing or Equivalent

Icemaker

Shut-Off Valve

Drain Valve

Icemaker	Ice	Be sure there is sufficient
	Storage
Drain Outlet		extra water supply line and
	Bin
3/4" FPT		drain line for the appliance
		to be pulled out for service.
Minimum 1/4"		Separate piping to approved
Nominal ID
		drain. Leave a 2-inch (5-cm)
Hard Pipe or
		vertical air gap between the
Equivalent
		end of each pipe and the
Bin Drain Outlet		drain.
3/4" FPT	Vent Tube
		2-inch (5-cm) air gap
	Minimum 3/4" Nominal ID
	Hard Pipe or Equivalent
Fig. 5		Floor Drain
	Water-Cooled Models
Model Shown:
	Connection to an Open Drain System
KML-451MWH

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