Figure 15: Typical field wiring (air handler/electrical heat) (three-phase)
Instructing the user
Assist the user with processing warranty cards or online
registration. Review the User’s Guide, and provide a
copy to the user and guidance on correct operation and
maintenance. Instruct the user 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
• Do not allow dirt to accumulate on the outdoor
coils or other parts in the air circuit. Clean as often
as necessary to keep the unit clean. Use a brush,
vacuum cleaner attachment, or other suitable
means.
• The outdoor fan motor is permanently lubricated
and does not require periodic oiling.
• If the coil needs to be cleaned, use clean water to
wash dust, dirt, and debris from outdoor coil.
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.
• Refer to the furnace or air handler instructions for
filter and blower motor maintenance.
• The indoor coil and drain pan must be inspected
and cleaned regularly to prevent odors and assure
proper drainage.
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.
R-410A Outdoor Split-System Air Conditioning 19
Johnson Controls Ducted Systems
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