Classic 20 ACU Installation, Operating & Maintenance Manual
AC-2 CS020020 USACG-6 Manual Rev B
Page 3 of 16
1
GENERAL SAFETY & WARNING INSTRUCTIONS
Certain parts of electrical systems are inevitably live or have a high operating temperatures. Observe
caution at all times.
Failure to observe these conditions and installation instructions can cause injury and damage.
The system is to be installed and maintained only by trained and qualified personnel.
Do not apply power until all ground connections have been made.
The unit is fitted with pressed and folded metal parts, which could have sheared metal edges. Be cautious
handling the unit, especially when working in poorly accessible places.
Check that no tools, test equipment, torches etc. have been left in or on the equipment on completion of
work.
Ensure the cover(s) and all mounting hardware are firmly secured before leaving installation.
All cable and connectors must conform to UL standards.
Most models are UL recognized and tested to UL484. It will comply where necessary with the safety
requirements as defined in UL484.
When servicing the unit, do not remove the cover(s) for 5 minutes after switching the unit off to allow
pipe work (compressor discharge) to cool.
2
UNPACKING, HANDLING & INITIAL INSPECTION
The air conditioner should be inspected on initial delivery and any damage to packaging noted. The unit
should be maintained in the upright position at all times. Special consideration should be given to correctness
of external packing damage or abrasion, loose components, surface marks and oil leakage. Any damage
should be noted on the freight bill and a claim should be immediately filed with the freight company. All
packaging materials should be retained for inspection.
Under no circumstances must the unit be inverted, as the oil will drain from the compressor into the
refrigerant piping system.
Do not attempt to operate the unit if it appears to be damaged from being dropped.
Do not attempt to operate the unit in a horizontal position (on its side, back or front). Place the unit in an
upright or vertical position for at least 5 minutes before operating.
