Instructing the user
When installation and start-up is complete, instruct the owner on the following:
• Processing warranty cards or online registration
• Reviewing the User’s Information Manual
• Operating and maintaining the unit correctly, how to start, stop, and adjust the temperature
setting
• When applicable, instruct the user that the compressor is equipped with a crankcase heater
to prevent the migration of refrigerant to the compressor during the OFF cycle. The heater is
energized only when the unit is not operating in cooling. If the main switch is disconnected
for long periods of shut down, do not attempt to start the unit until 8 h after the switch has
been connected. This allows sufficient time for all liquid refrigerant to be driven out of the
compressor.
• The installer must also instruct the user on correct operation and maintenance of all other
system components.
Maintenance and repair
NOTICE
Do not use coil cleaners to clean outdoor coil. Cleaners containing hydrogen fluoride (HF), hydroxides,
chlorides, and sulfates can greatly reduce the lifetime of the micro channel coil.
CAUTION
It is unlawful to knowingly vent, release, or discharge refrigerant into the open air during repair,
service, maintenance, or the final disposal of this unit.
Repair and maintenance to electrical components must include initial safety checks and component
inspection procedures.
Initial safety checks must include:
• Ensure capacitors are discharged to avoid the possibility of sparking.
• Ensure no live electrical components and wiring are exposed while charging, recovering or
purging the system.
• Ensure there is continuity of earth bonding.
During repairs to sealed components, all electrical supplies must be disconnected from the
equipment being worked upon prior to any removal of sealed covers. If it is absolutely necessary to
have an electrical supply to equipment during servicing, then a permanently operating form of leak
detection must be located at the most critical point to warn of a potentially hazardous situation.
CAUTION
Be aware that equipment malfunction may be due to refrigerant loss and potential leaks.
45Installation Manual: R-454B Outdoor Split-System Air Conditioner
Johnson Controls Ducted Systems
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