Hoshizaki KM-1900SAH/3 Instruction Manual page 30

b) Connection to a Closed Loop System
• Condenser water supply inlet is 1/2" female pipe thread (FPT). A minimum of 3/8" nominal
ID copper water tubing or equivalent is required for the condenser water supply line.
• Condenser return outlet is 3/8" FPT. A minimum of 3/8" nominal ID copper water tubing or
equivalent is required for the condenser return line.
• Shut-off valves and drain valves should be installed at both the condenser water supply
inlet and condenser return outlet.
• The water supply to the condenser should not drop below 4 GPM.
• The pressure differential between the condenser water supply inlet and condenser return
outlet 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 condenser water supply inlet
temperature should not drop below 45°F (7°C) and the condenser return 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 return outlet temperature 5 minutes after a
freeze cycle starts. If the condenser return 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).
Condenser Return Outlet 3/8" FPT
Condenser Water Supply Line Shut-Off Valve
Condenser Return Line
Shut-Off Valve
Minimum 3/8" Nominal
ID Copper Water Tubing
Condenser Return Line Drain Valve
Separate piping to approved
drain. Leave a 2 inch (5 cm)
vertical air gap between the
end of each pipe and the drain.
2-inch (5-cm)
air gap
Floor
Drain
Minimum 3/8" Nominal
ID Copper Water Tubing
Icemaker Water Supply
Line Drain Valve
Condenser Water
Supply Line
Drain Valve
KM-1900SWH/3
Connection To A Closed Loop System
Icemaker Water Supply
Line Shut-Off Valve
Vent Tube
Minimum 3/4"
Nominal ID Hard Pipe
30
Icemaker Water Supply
Inlet 1/2" FPT
Condenser Water
Supply Inlet
1/2" FPT
Icemaker
Icemaker
Drain Outlet
3/4" FPT
Condensation
Drain Outlet
3/8" OD Hard
Bin
Tube
Bin Drain Outlet
3/4" FPT
Fig. 19