Perfect Humidity™ Control Connections; Control And Power Wiring Diagrams - Bryant Preferred Series Installation Instructions Manual

CONTROL
BOX
BUSHING
SINGLE
POINT BOX
MOUNTING
SCREWS
DRIP BOOT
BRACKET
MOUNTING
SCREWS
POWER
WIRES
FOAM
BUSHING
HEATER
RELAYS
HEATER
MOUNTING
SCREWS
Fig. 37 — Typical Single Point Installation
Low-Voltage Control Connections
All units except size 06, 575V:
Pull the low-voltage control leads from the heater module(s) —
VIO and BRN (two of each if two modules are installed; iden-
tify for Module #1) — to the 4-pole terminal board TB4 locat-
ed on the heater bulkhead to the left of Heater #1. Connect the
VIO lead from Heater #1 to terminal TB4-1. For 2 stage heat-
ing, connect the VIO lead from Heater #2 to terminal TB4-2.
For 1 stage heating with 2 heater modules, connect the VIO
lead from both Heater #1 and #2 to terminal TB4-1. Connect
both BRN leads to terminal TB4-3. See Fig. 38.
CTB
CONTL
BOARD
2
VIO
3 ORN
12
BRN
ORN
TB4 1
VIO
Field
Connections
for Field-Installed
Electric Heat
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
Fig. 38 — Accessory Electric Heater Control Connections
(All Units Except Size 06, 575V), 2 Stage Heat Shown
Size 06, 575V units only:
Pull the low-voltage control leads from the heater module(s) —
VIO, WHT and BRN (two of each if two modules are installed;
identify for Module #1) — to the 4-pole terminal board TB4 lo-
cated on the heater bulkhead to the left of Heater #1. Connect the
WHT lead from Heater #1 to TB4 where ORN is. For 2 stage
heating, connect the VIO lead from Heater #2 to the terminal
that has VIO from the unit. For 1 stage heating with 2 heater
VIO BRN
2 3
VIO BRN BRN
Elec Htr
VIO HR2 BRN
VIO HR1 BRN
modules, connect the VIO lead from Heater #2 to the same ter-
minal with WHT lead from Heater #1 (see Fig. 39).
CONTROL
BOARD
12
2
3
ORN
Field Connections
for Field Installed
Electric Heat
Fig. 39 — Accessory Electric Heater Control Connections
(Size 06, 575V Only), 2 Stage Heat Shown
PERFECT HUMIDITY™ CONTROL CONNECTIONS
Perfect Humidity Space RH Controller
NOTE: The Perfect Humidity system is a factory-installed option
which is only available for units equipped with belt-drive motors.
The Perfect Humidity system is not available for single phase (-J
voltage code) models.
The Perfect Humidity dehumidification system requires a
field-supplied and field-installed space relative humidity con-
trol device. This device may be a separate humidistat control
(contact closes on rise in space RH above control setpoint) or a
combination thermostat-humidistat control device with isolat-
ed contact set for dehumidification control.
Connecting the Field-Installed Humidistat
1. Route the humidistat 2-conductor cable (field-supplied)
through the hole provided in the unit corner post.
2. Feed wires through the raceway built into the corner post (see
Fig. 33) to the 24-v barrier located on the left side of the con-
trol box. The raceway provides the UL-required clearance
between high-voltage and low-voltage wiring.
3. Use wire nuts to connect humidistat cable to two PINK leads
in the low-voltage wiring as shown in Fig. 40.
Connecting the Field-Installed Thermidistat device
1. Route the Thermidistat multi-conductor thermostat cable
(field-supplied) through the hole provided in the unit corner
post.
2. Feed wires through the raceway built into the corner post (see
Fig. 33 on page 20) to the 24-v barrier located on the left side
of the control box. The raceway provides the UL-required
clearance between high-voltage and low-voltage wiring.
3. The Thermidistat has dry contacts at terminals D1 and D2 for
dehumidification operation (see Fig. 41). The dry contacts
must be wired between CTB terminal R and the PINK lead to
the LTLO switch with field-supplied wire nuts. Refer to the
installation instructions included with the Thermidistat device
for more information.

CONTROL AND POWER WIRING DIAGRAMS

See Fig. 42-46.
21
TO 24V TRANS
VIO BRN
RED
TB4
BRN
BRN
RED
LS
VIO HCR2 HC2
WHT HCR1 HC1