17
Low--Voltage Control Connections —
Pull the low--voltage control leads from the heater
module(s) -- VIO and BRN (two of each if two modules
are installed; identify for Module #1) -- to the 4--pole
terminal board TB4 located on the heater bulkhead to the
left of Heater #1. Connect the VIO lead from Heater #1 to
terminal TB4--1. For 2 stage heating, 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. 27.
ORN
BRN
Field
Connections
HR1: On Heater 1 in Position #1
HR2: On Heater 2 in Position #2 (if installed)
2
3
12
1
3
VIO
ORN
VIO
BRN
VIO
BRN BRN
VIO
2
TB4
VIO
HR2
HR1
BRN
VIO
BRN
Elec Htr
CTB
CONTL
BOARD
C08331
Fig. 27 -- Accessory Electric Heater Control
Connections
Perfect Humidity
t
Control Connections
Perfect Humidity – Space RH Controller —
NOTE
: Perfect Humidity is a factory installed option
which is only available for units equipped with belt--drive
motors. Perfect Humidity is not available for single phase
(--J voltage code) models.
The Perfect Humidity dehumidification system requires a
field--supplied and --installed space relative humidity
control 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 such as Bryant’s EDGE
R
Pro Thermidistat with
isolated contact set for dehumidification control.
To connect a field--supplied humidistat:
1. Route the humidistat 2--conductor cable (field--sup-
plied) through the hole provided in the unit corner
post.
2. Feed wires through the raceway built into the corner
post (see Fig. 22) 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. Use wire nuts to connect humidistat cable to two
PINK leads in the low–voltage wiring as shown in
Fig. 29.
To connect the Edge Programmable Thermidistat
(T6--PRH01--A):
1. Route the Edge Programmable Thermostat multi--
conductor cable (field--supplied) through the hole
provided in the unit corner post.
2. Feed wires through the raceway build into the corner
post (see Fig. 22) 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 Edge Programmable Thermostat has dry contacts
at terminals D1 and D2 for dehumidification
operation (see Fig. 30). 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
Bryant Edge Programmable Thermidistat device for
more information.
C09502
Fig. 28 -- EDGE Pro Thermidistat
558J