Carrier F55 - Ground Connections; Minimum CFM and Motor Speed Selection

F55: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
8
A240459
Fig. 12 – Wiring Layout 2-Stage AC Unit w/o Aux Heat
A240460
Fig. 13 – Wiring Layout 2-Stage Heat Pump Unit w/o Aux Heat
Transformer Information
The transformer is factory wired for 115V operation.
Ground Connections
NOTE: Use UL listed conduit and conduit connectors for connecting
supply wire(s) to unit to obtain proper grounding. Grounding may also
be accomplished by using grounding lugs provided in control box.
Minimum CFM and Motor Speed Selection
The fan speed selection is done at the motor connector. Units require a
minimum CFM. Refer to the unit wiring label to ensure that the fan
speed selected is not lower than the minimum fan speed indicated.
A11048
Fig. 14 – Motor Speed Selection
† high airflow is same CFM as Tap 3, except 0 sec off delay
‡ high static applications, see airflow tables for max airflow
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to establish uninterrupted or unbroken ground could result in
personal injury and/or death.
According to NEC, NFPA 70, and local codes, the cabinet must have an
uninterrupted or unbroken ground to minimize personal injury if an
electrical fault should occur. The ground may consist of electrical wire
or metal conduit when installed in accordance with existing electrical
codes. If conduit connection uses reducing washers, a separate ground
wire must be used.
Table 1 – Fan Speed Selection
Tap 1
Low 90 sec off delay
Tap 2
Medium 90 sec off delay
Tap 3
High 90 sec off delay
Tap 4
High † 0 sec off delay
Tap 5
Max ‡ 0 sec off delay