Electric Heater Installation; Line Power Connections - York AE SERIES Installation Manual

5169032-UIM-C-0416
Coils should be installed level or pitched slightly toward the drain end.
Suggested pitch should not exceed 1/4 inch per foot of coil.
The drain pan connections are designed to ASTM Standard D 2466
Schedule 40. Use 3/4" PVC or steel threaded pipe. Since the drains are
not subject to any pressure it is not necessary to use Schedule 40 pipe
for drain lines.
SECTION VIII: ELECTRIC HEATER
INSTALLATION
If the air handler requires electric heat, install the electric heat kit
according to the installation instructions included with the kit. After
installing the kit, mark the air handler nameplate to designate the heater
kit that was installed. If no heater is installed, mark the name plate
appropriately to indicate that no heat kit is installed.
Use only 6HK Revision C or later heater kits, as listed on air handler
name plate and in these instructions. Use data from Tables 4 - 10 for
information on required minimum motor speed tap to be used for
heating operation and maximum over-current protection device
required as listed for combination of air handler and heater kit.
For Upflow, Downflow and Horizontal left-hand applications, the kits can
be installed without modification.
Field modification is required for Horizontal right-hand airflow applica-
tion only. Follow instructions with heater for modification.
NOTICE
In some horizontal applications, the service disconnects on the elec-
tric heat kits must be rotated 180° so the up position of the discon-
nect is the ON position. This service disconnect orientation change is
required by UL1995, Article 26.19 (in reference to all circuit break-
ers).
FIGURE 16: Line Power Connections
10
SECTION IX: LINE POWER CONNECTIONS
Power may be brought into the unit through the supply air end of the
unit (top left when unit is vertical) or the left side panel. Use the hole
appropriate to the unit's orientation in each installation to bring conduit
from the disconnect. The power lead conduit should be terminated at
the electrical control box. To determine proper wire sizing, refer to
Tables 6 - 10 and the latest edition of the National Electric Code or in
Canada the Canadian electrical Code and local codes to determine
correct wire sizing. To minimize air leakage, seal the wiring entry point
at the outside of the unit.
All electrical connections to air handlers must be made with copper
conductors. Direct connection of aluminum wiring to air handlers is
not approved.
If aluminum conductors are present, all applicable local and national
codes must be followed when converting from aluminum to copper
conductors prior to connection to the air handler.
The chosen conductor and connections all must meet or exceed the
amperage rating of the overcurrent protector (service disconnect or
fuse) in the circuit.
Existing aluminum wire within the structure must be sized correctly for
the application according to National Electric Code and local codes.
Caution must be used when sizing aluminum rather than copper
conductors, as aluminum conductors are rated for less current than
copper conductors of the same size.
Johnson Controls Unitary Products