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Field Control Wiring —
The 558J unit requires an external temperature control
device. This device can be a thermostat emulation device
provided as part of a third- - party Building Management
System.
Thermostat —
Select a Bryant- - approved accessory thermostat. When
electric heat is installed in the 558J unit, the thermostat
must be capable of energizing the G terminal (to energize
the Indoor Fan Contactor) whenever there is a space call
for heat (energizing the W1 terminal). The accessory
thermostats listed on the unit price pages can provide this
signal but they are not configured to enable this signal as
shipped.
Install the accessory thermostat according to installation
instructions included with the accessory.
Locate the thermostat accessory on a solid wall in the
conditioned space to sense average temperature in
accordance with the thermostat installation instructions.
If the thermostat contains a logic circuit requiring 24- - v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the
thermostat does not require a 24- - v source (no "C"
connection required), use a thermostat cable or equivalent
with minimum of six leads. Check the thermostat
installation instructions for additional features which
might require additional conductors in the cable.
For wire runs up to 50 ft. (15 m), use no. 18 AWG
(American Wire Gage) insulated wire [35_C (95_F)
minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG
insulated wire [35_C (95_F) minimum]. For over 75 ft.
(23 m), use no. 14 AWG insulated wire [35_C (95_F)
minimum]. All wire sizes larger than no. 18 AWG cannot
be directly connected to the thermostat and will require a
junction box and splice at the thermostat.
Ttypical
Thermostat
Corrections
C
G
W2
(Note 3)
W1
O/B/Y2
(Note 1)
(Note 2)
Y1
R
Note 1: Typical multi-function marking. Follow manufacturer's configuration
instructions to select Y2.
Note 2: Y2 to Y2 connection required on single-stage cooling units when
integrated economizer function is desired
Note 3: W2 connection not required on units with single-stage heating.
Field Wiring
Fig. 21 - - Low- - Voltage Connections
Central
Terminal
Board
X
C
T
H
G
E
R
W2
M
O
W1
S
T
Y2
A
T
Y1
R
C08575
Unit without Thru- - Base Connection Kit —
Pass the thermostat control wires through the hole
provided in the corner post; then feed the wires through
the raceway built into the corner post to the control box.
Pull the wires over to the terminal strip on the upper- - left
corner of the Controls Connection Board. See Fig. 22.
RACEWAY
HOLE IN END PANEL (HIDDEN)
Fig. 22 - - Field Control Wiring Raceway
NOTE:
If thru- - the- - bottom connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.
Heat Anticipator Settings —
Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second- - stage heating, when available.
Electric Heaters
558J units may be equipped with field- - installed accessory
electric heaters. The heaters are modular in design, with
heater frames holding open coil resistance wires strung
through ceramic insulators, line- - break limit switches and
a control contactor. One or two heater modules may be
used in a unit.
Heater modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide into the
compartment on tracks along the bottom of the heater
opening. See Fig. 23, Fig. 24 and Fig. 25.
Not all available heater modules may be used in every
unit. Use only those heater modules that are UL listed for
use in a specific size unit. Refer to the label on the unit
cabinet for the list of approved heaters.
Unit heaters are marked with Heater Model Numbers. But
heaters are ordered as and shipped in cartons marked with
a corresponding heater Sales Package part number. See
Table 2 for correlation between heater Model Number and
Sales Package part number.
NOTE: The value in position 9 of the part number differs
between the sales package part number (value is 1) and a
bare heater model number (value is 0).
15
C08027
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