TechPlus ComfortAire, Service Supplement Manual

Page: 60 / 86

System Service and Maintenance
Notes
Service Guidelines
Routine maintenance such as cleaning filters and checking the compressor
belt tension are procedures that should be included in the driver pre-use
inspection.
However, only trained HVAC technicians should perform air conditioning
service for mobile equipment. Proper HVAC tools and equipment is an
absolute necessity to ensure the service is performed correctly.
Along with using a trained HVAC technician, there are simple service rules that
should be followed during an initial installation or during service repair work.
Compressor Oil Charge
This is often a topic of many opinions. Generally there is enough oil charge in
the compressor to handle a system with a refrigerant charge of 3lbs. With these
systems being larger an additional 5oz of oil must be added to each system
during an installation.
The compressor is filled with PAG oil (Poly Alkylene Glycol).
To retain a valid warranty on the compressor, Seltec ZXL 100 PAG oil must
be used. Add the oil on the suction port on the compressor prior to vacuuming
the system, or use the automatic oil injector found on most refrigeration charging
stations.
Component Replacement and Refriger ation Leaks – The other instance
when oil may need to be added, is when there is a leak in the evaporator,
condenser, or the receiver drier needs to be replaced, 1 once of oil should
be added for each component replaced.
If there is a refrigerant leak, the system should have the remaining refrigerant
evacuated. The best way to determine where the leak is located is to charge the
system with dry nitrogen. Use a spray bottle filled with a mixture of soap and
water to spray on all of connections to find where the leak is occurring. Most
charging stations also have the ability to inject leak detection fluid and then use a
light or sniffer to determine where the leak is.
5
1
APPENDIX
c O m F O r t A i r e A / c s Y s t e m s
c c
8 0