Safety - AAON WH Series Installation Operation & Maintenance

Safety

NOTE - Notes are intended to clarify the unit installation, operation and maintenance.
CAUTION - Caution statements are given to prevent actions that may result in
equipment damage, property damage, or personal injury.
WARNING - Warning statements are given to prevent actions that could result in
equipment damage, property damage, personal injury or death.
CAUTION
Rotation must be checked on all
COMPRESSORS AND MOTORS of 3
phase units at startup by a qualified
service technician.
Scroll compressors are directional
and can be damaged if rotated in the
wrong direction. Compressor rotation
must be checked for proper operation,
without using
pressure gauges.
compressor running
rotation will be much louder than a
normal compressor, and will not
develop much of a temperature
differential between the suction and
discharge lines.
Fan motor rotation must also be
checked for
Alterations must only be made at the
unit power connection.
6
Attention must be paid to the following statements:
external refrigerant
Often,
in reverse
proper operation.
To prevent damage to the unit, do not
use acidic chemical coil cleaners. Do
not use
cleaners with a pH value greater than
8.5, after mixing, without first using
an aluminum corrosion inhibitor in the
cleaning solution.
a
Cleaning the cooling tower or the
water loop with harsh chemicals,
such as hydrochloric acid (muriatic
acid) or chlorine, can damage the
refrigerant-to-water heat exchanger.
Care must be taken to avoid allowing
chemicals to enter the refrigerant-to-
water heat exchanger. See Appendix
A - Heat
Resistance for more information.
CAUTION
alkaline chemical
CAUTION
Exchanger Corrosion
coil