Pierce Enforcer, Operator'S Manual

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Cab / 6-3
MAINTENANCE
6-4.2 Air Conditioning (Optional)
NOTE: Do not add refrigerant unless the system is checked for leaks and any leaks found are repaired.
The air conditioning system should be checked at the start of the warm weather season. The service should include
cleaning of the condenser fins and a refrigerant level check. Charge requirements for the system can be found on
a tag on the rear unit. Drive belt tension should also be checked at this time. Some units will have air intake filters.
This filter must be replaced if it becomes dirty. Condition of the filter will be based on conditions and use. Overhead
units have a drain pan and hoses to direct condensed water to the outside of the vehicle. Clean the pan and make
sure hoses are not blocked. The pan may have a foam pad that prevents water from sloshing. Replace the pad as
necessary. Inspect all vents for looseness and operation. Replace if necessary.
Use only refrigerants approved by Pierce Manufacturing for your air conditioning system. Some
unapproved refrigerants are flammable and can explode, causing injury to personnel. Other
unapproved refrigerant can cause the system to fail, requiring costly repairs.
The air conditioning system contains refrigerant under high pressure. To avoid risk of personal injury
or damage to the system, adding refrigerant or any repair requiring lines to be disconnected should be
done by a certified repairman.
Air conditioning system contains R134A:
• Avoid breathing refrigerant and lubricant vapor or mist;
• Exposure may irritate eyes, nose and throat;
• To remove R134A from air conditioning system, use equipment certified to meet SAE J2210;
• If R134A discharge occurs, ventilate work area before resuming service;
• Additional health and safety information may be obtained from refrigerant and lubricant
manufacturers.
Do not operate the air conditioning with the cab up.