RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
35
Connect electronically and run motor‐fan shaft must not wobble.
d. Assembly of bearings, bearing sleeve and clamping collar. Install clamping collar loosely
on bearing housing. Insert bearing sleeve and then bearing on the fan shaft and push up
into bearing housing.
e. Assembly of fan blade. Grease* the fan shaft hole in the fan blade. Install fan blade
with curved “hump” up. Cross bolts and nuts are to be just tight; not forced tight. Snug,
do not tighten set screw in clamping collar after fan blade is mounted.
f. Fan motor wiring – be sure it is connected for 230V. When attaching motor wires to
motor starter, the color code is red, white, and black, from left to right; i.e. T1, T2, T3.
Check fan rotation. Must be counter‐clockwise as viewed from top of freezer.
*GREASE – Use silicone or compound GE ‐ G661 or Vaseline.
10. Trouble Shooting
This section helps the maintenance or reliability team troubleshoot the freezer and take the appropriate
actions. Additional information on the various components can be found in the appendices.
Troubleshooting should only be carried out by qualified personnel. Contact RS Cryo with any questions or
concerns.
10.1. ELECTRICAL POWER SUPPLY
The Compact Freezer has been designed to operate from a singlephase, 60 Hz electrical power supply.
Use the electrical schematic in Appendix B – Reference Drawings for more information with respect to
the voltage requirements and other specifications. The variation in supply voltage to the freezer should
not 10 % to
‐ 5 % of the nominal value. In case of any operating problems, first check the voltage
at the main disconnect switch on the side of the electrical enclosure.
10.2. LIQUID NITROGEN SUPPLY
Check if the amount of liquid nitrogen in the storage tank is adequate for the intended operating period.
If the product exiting the freezer is not completely frozen, check the position of the LN
2
‐ control valve. If
the LN
2
‐ control valve is full open, check the storage tank pressure is sufficient. When the storage tank
pressure is lower than the minimum required pressure (20 psi), insufficient quantity of liquid nitrogen
will flow to the freezer through the supply piping. The normal operating pressure is 40 to 60 psig, but may
be higher depending on the distance of the tank from the freezer.
Occasionally, the nozzles in the spray bar may become blocked by food or other debris. To compensate
for this loss, the LN
2
‐ control system will cause a higher than normal injection pressure, to maintain the
temperature. In the case of severe blockage, the temperature in the freezer will rise and the product will
not be sufficiently frozen.
10.3. CONVEYOR SYSTEM
Single phase induction motors power the belt drive system of the Compact freezer. If the drive system