Hoshizaki KM-650MAH - Manual (Page 18)

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5. Line Set Exceeding 66 Feet
CAUTION
The icemaker, line set, and remote condenser unit must contain the same
type of refrigerant. Mixing of refrigerants will result in improper operation and
possible damage to the refrigeration system.
The maximum line length for the standard refrigerant charge is 66 feet. Should an
installation require a longer line length, line sizes must be increased and additional
refrigerant must be added. Adjust as described below.
a) Line Size
Instead of the standard 3/8" OD discharge line and 1/4" OD liquid line for this icemaker,
increase the line sizes to 1/2" OD discharge line and 3/8" OD liquid line for the entire run.
b) Refrigerant Charge
Add 16.5 oz. of R-404A to the system to compensate for the larger diameter line sizes, then
add .4 oz. of R-404A for each foot over 66 feet to a maximum of 100 feet.
After weighing in the additional charge, write the new correct total refrigerant charge on the
unit's rating label.
Hoshizaki Technical Support is available at 1-800-233-1940 for recommendations.
6. Electrical Connection
WARNING
1. Electrical connection must meet national, state, and local electrical code
requirements. Failure to meet these code requirements could result in death,
electric shock, serious injury, fire, or severe damage to equipment.
2. THE REMOTE CONDENSER UNIT MUST BE GROUNDED. Install a proper
ground wire from the icemaker to the remote condenser unit. Use wire of an
appropriate gage and outdoor rating. Failure to properly ground the unit could
result in death or serious injury.
3. The remote condenser unit leads must be connected to the fan motor junction
box leads on the icemaker. Use wire of an appropriate gage and outdoor
rating.
4. Do not connect the leads to an external power source. Do not connect the
icemaker's fan motor junction box leads together. Do not allow the leads to
contact the junction box walls.
5. To reduce the risk of electric shock, make all remote condenser unit
connections before connecting the icemaker power supply.
6. On remote air-cooled models, the icemaker should have power for a minimum
of 4 hours prior to startup to prevent compressor damage.
• Usually an electrical permit and services of a licensed electrician are required.
• The opening for the power supply connection is 7/8" DIA to fit a 1/2" trade size conduit.
1) Remove the louver panel. See Fig. 10.