VOGT ICE TUBE-ICE P-24A, Service Manual

Page: 72 / 146

7-6
P24A & P34A Service Manual
MAINTENANCE
12/17/2012
Service/Frequency 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
Compressor.
In starting and charging the unit, the oil sight glass should be continually checked to
make sure an adequate oil level is maintained. The oil level should be 1/4-3/4 of the sight glass. If
the oil level drops below 1/4 of the glass, add two quarts of 300 SSU viscosity refrigeration oil as per
the compressor manufacturer recommendations. Never allow the oil level to be out of sight, above
or below the sight glass when the compressor is operating.
! CAUTION !
The crankcase heater should be energized for a minimum of
four hours and the oil temperature should be 100
° ° ° °
-110
° ° ° °
F
before attempting to start the compressor.
! CAUTION !
During operation, the specified net oil pressure should be maintained for proper lubrication and
operation of the cylinder unloader mechanism.
Mycom N&W Series net oil pressure: 17-28 psig
Vilter 450 Series net oil pressure: 35-50 psig
Note: Net oil pressure is calculated by subtracting the compressor suction pressure from the oil
pressure gage reading while the compressor is running.
Example:
Oil pressure gage reading: 65 psig
Suction pressure gage reading: 40 psig
Net Oil Pressure: 25 psig
The compressor oil should be changed at close intervals during initial break-in operation and up to
the first 1000 hours (see Table 7-4 below). Your machine was test operated at the factory and
compressor oil was drained, crankcase cleaned, suction strainer sock cleaned, new oil filter installed
(if applicable), and clean oil added prior to shipping.