Vogt P18AL TUBE-ICE, Service Manual

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P18AL Service Manual
MAINTENANCE
3/6/07
7-6
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 cavitating 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.
! CAUTION !
Follow all lock-out and tag-out procedures before servicing any electrical equipment.
! CAUTION !
Maintenance Operation Start-Up Monthly Six Months Shutdown
Clean debris from unit X X X
Clean strainer and flush sump X X X
Check fan and pump rotation X
Clean spray nozzles X X
Check belt tension X X
Check for noise/vibration X X
Check/adjust make-up water valve X X
Check/adjust bleed rate X X
Check/lubricate fan bearings X X
Lubricate motor base adj. Screw X X X
Drain sump and piping X
TABLE 7-3
Cooling Tower Maintenance Schedule