Hoshizaki IM-21CNE Instruction Manual page 9

ENGLISH
* Drain lines should not be piped directly to the sewer system. A vertical air gap of a minimum of 5
cm should be between the end of the drain pipes from the icemaker and the floor drain.
* To prevent a backflow into the storage bin, the outlet hose must be laid as shown.
GOOD
Downgrade
* On water-cooled model, a back flow preventer may be required in the cooling water circuit.
* Be sure to use the new hose-sets supplied with the appliance. Do not reuse any old hose-sets.
[Air-Cooled Model]
1) Attach the angled end of white flexible inlet hose (accessory) to the G3/4 fitting
on the rear side 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, noting washer is correctly
positioned before hand tightening as above. It is a wise precaution to have a
stop valve within easy reach.
3) Hand tighten grey flexible outlet hose (accessory) onto the R3/4 fitting on
the rear of the icemaker as indicated, ensuring rubber washer is correctly
positioned to obtain a leak free joint. The pipe can be cut to length as
necessary to suit position of main drain.
[Water-Cooled Model]
* Hoshizaki recommends that the water-cooled condenser should be connected
to a closed circuit recirculating type cooling system utilizing a tower, water chiller
or similar. Water make up should be via a ball valve/break tank arrangement.
* 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 WRAS regulations in U.K.
* When selecting a cooling tower, refer to the following peak values of heat flow in the condenser:
Model IM-240W:
IM-30CW/45W:
IM-65W:
* 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.
[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.
BAD
Upgrade
5235W
295 - 760W
875W
BAD
Inlet Hose
Outlet Hose
6
5cm air gap
Floor
Drain
Air-Cooled Model
Potable Water
Inlet G3/4
Drain Outlet R3/4
Water Supply Tap
Inlet Hose