Unit Without Thru- - Base Connection Kit; Heat Anticipator Settings; Low Ambient Control (Factory Option); Variable Frequency Drive (Vfd) 2- -Speed Indoor Fan Motor System (Factory Option) - Bryant 581Jx14 series Installation Instructions Manual

Typical
Thermostat
Connections
C
G
W2
(Note 2)
W1
O/B/Y2
(Note 1)
Y1
R
Note 1: Typical multi-function marking. Follow manufacturer's configuration
instructions to select Y2. Do not configure for O output.
Note 2: W2 connection not required on units without electric heating.
Field Wiring
Fig. 41 - - Typical Low- - Voltage Control Connections
For wire runs up to 50 ft. (15 m), use no. 18 AWG
(American Wire Gage) insulated wire (35_C minimum).
For 50 to 75 ft. (15 to 23 m), use no. 16 AWG insulated
wire (35_C minimum). For over 75 ft. (23 m), use no. 14
AWG insulated wire (35_C 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.
Unit without Thru- - Base Connection Kit —
Pass the thermostat control wires through the bushing on
the unit end panel. Route the wire through the snap- - in
wire tie and up to the web bushing near the control box.
Route the wire through the bushing and into the bottom
left side of the control box after removing one of the two
knockouts in the corner of the box. Using a connector at
the control box to protect the wire as it passes into the
control box. Pull the wires over to the terminal strip at the
upper left corner of the Central Terminal Board (CTB).
Use the connector at the control box and the wire tie to
ensure that the thermostat wire is tight and will not be
damaged by contact with the condenser coil. See Fig. 42.
Central
Terminal
Board
X
C
T
H
G
E
R
W2
M
O
W1
S
T
Y2
A
T
Y1
R
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Fig. 42 - - Thermostat Wire Routing
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.

Low Ambient Control (Factory Option)

If the unit comes with Electro- - Mechanical (EM) control,
then no adjustment is necessary.
If the unit comes with the RTU Open control option, then
refer to its installation control manual for details on
adjusting "Cooling Lock- - Out" setting and configure for
your specific job requirements.
Variable Frequency Drive (VFD) 2- -Speed Indoor
Fan Motor System (Factory Option)
For details on operating 581J 2 stage cooling units
equipped with the factory installed Variable Frequency
Drive (VFD) 2- - Speed Indoor Fan Motor System option,
refer to the Variable Frequency Drive (VFD) installation,
Setup & Troubleshooting Supplement (Catalog No.
IIVFD- - 02, or later).
EconoMi$er X - - Ultra Low Leak Economizer
(Factory Option)
For details on operating 581J 2 stage cooling units
equipped with a factory installed EconoMi$er X, refer to
Factory- - Installed Economizers for 580J/558J/581J/551J/
549J/582J/559J/547J Rooftop Units, 3 to 27.5 Nominal
Tons. Economizer Supplement Related to California Title
24 (Catalog No. II- - SUP- - TI24- - 02, or later).
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