Vogt P-34AL-15, Service Manual, Page: 72 / 159

P34AL-15 & P34ALOF-15 Service Manual
7-5
MAINTENANCE
9/22/2005
Water Tank. The production of opaque ice can indicate that the water in the water tank contains a
concentrated amount of solids or salts. See Troubleshooting, “Poor Ice Quality”.
To clean the water tank:
1. Stop the machine at the end of harvest.
2. Shut off the make-up water supply.
3. Open the drain valve and drain the tank.
4. Remove the water box cover and flush out any loose sediment from the tank. The wire mesh
screen can be removed if necessary.
5. If further cleaning is needed, follow “Cleaning Procedure”.
6. If further cleaning is not needed, close the drain valve and refill the tank with fresh water.
7. Make sure the float valve is adjusted properly and install the water box cover.
8. Start and stop the pump again to make sure it is circulating water and is not air bound.
Water Cooled Condenser Cleaning (optional).
As water evaporates from a cooling tower, the
solid impurities remain and must be flushed from the system to prevent a scale build-up in the
condenser and cooling tower. This can be accomplished by a continuous bleed off valve located in
the pump discharge line. The valve should be adjusted to bleed off an equal amount of water to the
evaporated. If water hardness is very high, a higher bleed off rate or chemical treatment may be
required. Consult your local water treatment company for recommendations.
If after a period of time, scale has formed inside the tubes, mechanical cleaning may be necessary.
See “Servicing Section--Condenser”.
Cooling Tower/Evap Condenser (optional).
1. Bleed off valve. The bleed off valve should be checked monthly to assure that is not blocked
and that water is flowing as required. If the unit is controlled by a water treatment system, the
bleed off valve may not be required.
2. Strainer. The pan or sump strainer is located in the bottom of the sump at the suction connection
to the pump. The strainer should be inspected monthly and kept clean. Do not operate the unit
without the strainer in place.
3. Make-up water float valve. This valve should be checked monthly for proper operation and
adjustment. It should be adjusted to maintain a water level below the overflow and high enough
to prevent the pump from cavitation when the system is in operation.
4. Spray nozzles. The spray nozzles should be checked monthly to make sure none are restricted
and the spray pattern is complete and even.
5. Pump motor and fan motor. The motors should be checked and/or lubricated every six months
according to the motor manufacturer’s recommendations.
6. Fan bearings. The fan bearings should be lubricated every six months. Make sure the proper
grade of grease is used (normally conforms to NLCI-Grade 2) and it is best to use a hand grease
gun.
7. Fan belts. The fan belt tension should be checked weekly for the first two weeks of operation,
then monthly during continuous use.
The best tension for a V-belt is the lowest tension at which the belt will not slip under its full load.
Never use dressing on V-belts. Keep belts and grooves clean and free of oil, grease, and foreign
material. Clean with non-flammable, non-toxic degreasing agent or commercial detergent and
water.