OM 135
PFS 155C - 315C
7
9.
Start chilled water and condenser water pumps and vent air from the water piping as well as the
evaporator and condenser water sides. Start the auxiliary equipment for the installation by
making the remote start / stop input.
10.
Check resets of all safety controls.
11.
Place unit circuit breakers in “on" position.
12.
Place control panel switch in "auto" position.
13.
After running the unit for a short time, verify there is no flashing in the refrigerant sightglass.
System Maintenance
General
Check the liquid line sightglasses and take condensing and suction pressure readings. Using the
MicroTech keypad, ensure the unit has normal superheat and subcooling readings.
The refrigerant temperatures and pressures (Menu 5 on MicroTech) allows the operator to determine if
the chiller is performing properly. Record these values in a chiller log daily. The values will change as
the load, condenser temperature and evaporator temperature vary. The operator should be able to
correlate displayed information to varying load conditions.
Lubrication System
Compressor Maintenance
The semi-hermetic compressor does not require an oil separator, oil heaters or pumps, so yearly
maintenance is not normally required. However, vibration is an excellent check for proper mechanical
operation. Excessive compressor vibration indicates maintenance may be required and contributes to
a decrease in unit performance and efficiency. Using a vibration analyzer, check compressor at or
shortly after start-up and again on an annual basis. When performing the test the maintain the load as
closely as possible to the load of the original test.
The compressor is checked at the factory for minimum vibration of 0.14”/second (3.56mm/
second) at 3500 rpm (2917 rpm).
The compressor is supplied with a lifetime oil filter. If a visual inspection shows possible
restriction, then replace filter.
