VOGT ICE TUBE-ICE P-24A, Руководство по обслуживанию

Страница: 57 / 146

P24A & P34A Service Manual
ELECTRICAL CONTROLS
12/17/12
6-1
6. Electrical Controls
Your packaged Tube-Ice

machine is equipped with a compressor motor starter (1M) as required for
your particular voltage and a transformer (if required) for the control circuit power. The motor
starter and transformer are mounted on the machine front side (see Figures 1-1 or 1-8).
The control panel wiring schematic, FIGURE 6-3, illustrates these components as well as provisions
for auxiliary equipment which may be incorporated by the customer such as:
(FU1) Main power disconnect
(5M) Conveyor motor starter and overload (5MOL)
(6M) Tower fan starter and overload (6MOL)
(7M) Condenser pump starter and overload (7MOL)
When adding motor starters for auxiliary equipment, be sure to incorporate the overload protection
as indicated between terminals #12-#13 and remove the jumper wire. This will assure that the
machine will shutdown when any auxiliary equipment fails.
Bin Level Control
. Included in the wiring schematic is provision for a bin level control (BLC). The
NC contract of your control should be wired between terminals #8-#9 and the jumper wire removed
as indicated. Installation in this manner will allow the machine to finish the harvest period before
shutdown. However, the machine will still need to be manually started to resume production.
Safety Switches
. The machine is also equipped with the following safeties and control switches,
which are mounted to the frame near the compressor. Refer to the wiring schematic FIGURE 6-3 for
their circuitry.
• High/Low dual pressure switch (1PS) to stop the machine if the compressor suction pressure
goes too low (15-20 psi) or the compressor discharge pressure goes too high (225-250 psi). See
“High/Low Pressure Switch”.
• Oil failure pressure switch (0PS) to stop the machine if the compressor oil pressure drops to 15
psi net (suction pressure minus oil pressure gage reading). See “Oil Pressure Switch”.
• Fan control switch to maintain a desirable head pressure (discharge pressure) of 175 to 200 psi
during operation. See “Fan Control Switch”.