Hoshizaki IM-21 Service Manual page 47

* Whilst connecting a water-cooled Condenser to a mains water (potable) supply will not
affect the performance of the machine, it will most certainly cause a high use/waste of a
valuable resource and is not recommended.
* The services of a licensed or coded plumber should be used to ensure a correct installation.
* The connections should be made properly in compliance with the applicable national or
local regulations.
[a] Standard connections according to WRC regulations in U.K. (Fig. 9 and 10)
* When selecting a Cooling Tower, refer to the following peak values of heat flow in the
Condenser:
Model IM-25W, IM-30W, IM-45W: 290 - 755W
IM-65W:
IM-100W, IM-130W:
IM-240W:
* Pipes between the Cooling Tower and the icemaker should be at least 20 mm DIA to reduce
pressure loss, even though the icemaker fittings are 13 mm DIA.
* Pressure loss in the water circuit inside the unit will be 5 to 6 m when the cooling water flows
at the ratio of 4 to 5 lit/min.
* Select a Circulating Pump referring to the above values of heat flow.
* Do not use a Cascade Pump, or the Water Regulator will vary the flow and stop it during the
defrost cycle.
* The Strainer must be cleaned periodically.
[Icemaker Connections]
1) Attach the angled end of white flexible inlet hose (accessory) to the G3/4 fitting on the rear
of the icemaker as indicated, ensuring rubber sealing washer is correctly positioned. Hand
tighten sufficiently to provide leak free joint.
2) Attach the other end of inlet hose to the water tap (Fig. 5), noting washer is correctly
positioned before hand tightening as above.
Note:If filtration or treatment is used, ensure icemaker section only is on treated water
supply, not the Condenser.
3) Attach grey flexible outlet hose (accessory) to the R3/4 fitting on the rear of the icemaker
as indicated, confirming fitment of rubber washer before finally hand tightening the joint.
This pipe can be cut to length as necessary to suit position of main drain (Fig. 3).
875W
1165W
5235W
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