Bryant SM03-4 Service Manual page 31

AUX1
1 / "
4
HUM1
1
/ "
4
AUX2
1 / "
4
HUM2
1
/ "
4
GRY
1
/ "
4
AUX HEAT
KW/CFM
TABLE 7—CONNECTIONS ON SINGLE BARRIER STRIP MOUNTED, CROSS SLOTTED, CAPTIVE BINDING HEAD
SCREW
TERMINAL
W2 Connection for W2 signal from thermostat
W1 Connection for signal from thermostat W1
Connection for Y signal from thermostat
Y/Y2
or high speed compressor operation
G Connection for G signal from thermostat
O Connection for O signal from thermostat
This connection is a field termination for use in connecting L lines of thermostat and outdoor unit together. There is no
L
connection of this terminal with control circuity.
Y1 Connection for low-speed compressor operation
R Connection for R signal to thermostat (24 vac)
C Connection for C terminal to thermostat (24 vac common)
skip this step. Each select pin is marked with a range of heaters for
which airflow (also marked) is approved. For increased comfort
select the narrowest kw range matching the heater size, for
example, 0-10 for a 10-kw heater. This airflow must be greater
than the minimum CFM for electric heater application with the
size system installed for safe and continuous operation. Note that
airflow marked is the airflow which will be supplied in emergency
heat mode and heating mode on air conditioners when electric heat
is primary heating source. To ensure safe heater operation in heat
pump heating mode when electric heaters are energized, the ICM2
will run the higher of heat pump airflow and electric heater
airflow. The factory selection is largest heater range approved.
(See Fig. 24.)
SYSTEM DIAGRAM
HEATER/MOTOR
DIODE
LOGIC
AC/HP SYSTEM AC/HP CFM
SIZE TYPE ADJUST
Fig. 25—Easy Select Board Schematic
—31—
SEC1 SEC2
5 AMP
ON/OFF CONTINUOUS
DELAY FAN
DESCRIPTION
B. AC/HP Size
The factory setting for air conditioner or heat pump size is largest
unit meant for application with model of fan coil purchased. The
installer needs to select air conditioner or heat pump size to ensure
that airflow delivered falls within proper range for size of unit
installed in all operational modes. (See Fig. 24.)
C. System Type
The type of system must be selected.
1. AC—air conditioner
2. HP-COMFORT—provides lower airflow than air condi-
tioner selection (approximately 315 CFM/ton) in heating
mode. In cooling made supplies 350 CFM/ton.
D
H
J1
R
W
1
J2
W
2
Y
1
Y/Y
2
G
O
C
A96431