Hoshizaki IM-21CLE Instruction Manual page 3

ENGLISH
* This appliance requires a separate 220 - 240VAC, 10A supply. The
electrical supply must be protected by a suitable circuit breaker.
* The main control box fuse is rated at 5A and should only be replaced
by a qualified service engineer.
* Usually an electrical permit and services of a licensed electrician are
required.
* If the supply cord is damaged, it must be replaced by a special cord
or assembly available from the manufacturer or its service agent.
5. WATER SUPPLY AND DRAIN CONNECTIONS
WARNING
Connect to potable water supply only.
* The connections to the mains water supply must be made in
accordance with the countries' current requirements of the Water
Supply or Water Fittings Regulations.
* Water supply pressure should be minimum 0.05 MPa (0.5 bar) and
maximum 0.8 MPa (8 bar). If the pressure exceeds 0.8 MPa (8 bar),
use a pressure reducing valve. Do NOT throttle back the supply tap.
* A plumbing permit and services of a licensed plumber may be
required in some areas.
* On water-cooled models, a back flow preventer may be required in
the cooling water circuit.
* Water should drain into an open trap.
* The icemaker drain is gravity flow, so ensure drain pipe has an
adequate pitch or fall.
* To prevent a backflow into the Storage Bin, the outlet hose must be
laid as shown in Fig. 3.
GOOD
Downgrade
Fig. 3
* 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) onto
the G3/4 fitting on the rear of the icemaker as indicated (Fig. 4),
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. 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 (Fig. 4), ensuring
rubber sealing 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.
Note: Jointing compounds should be approved and suitable for
potable water use.
Inlet Hose
Outlet Hose
[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 (see Fig. 6 and 7). 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.
NO GOOD
* The services of a licensed or coded plumber should be used to
ensure a correct installation.
Upgrade
* 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.
NO GOOD
(Fig. 6 and 7)
* When selecting a Cooling Tower, refer to the following peak values
of heat flow in the Condenser:
Model
* 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
Potable Water
Inlet G3/4
Drain Outlet R3/4
Fig. 4
IM-25/30/45W: 295 - 760 W
IM-65W: 875 W
IM-100/130W: 1165 W
IM-240W: 5235 W
Water Supply Tap
Inlet Hose
Fig. 5