Start Up For Units Equipped for
FER
This section applies to single phase gas heat only.
Direct Drive
Direct drive FER units come from the factory with
the following three leads that lead to the indoor
motor.
• A yellow cooling lead
• A red heating lead
• A white, fan only lead
Each lead is put on a different tap on the motor
and provides different speeds. The leads are set
on default taps from the factory. See the wiring
diagrams for details on factory default speeds.
During installation, you may need to move the leads
to different taps depending on the airflow and static
requirements of the application.
Note: During installation, the tap chosen for
the heating speed must produce a temperature
rise that lies within the rise range stated on the
rating plate and the physical data tables.
Figure 35: 3 ton through 5 Ton, 1/2 in. Two Stage Gas Valve
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A 127
Johnson Controls Ducted Systems
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