Carrier FA4ANF, Руководство по обслуживанию, Страница: 31 / 52

through use of thermostats. When staging is a requirement, remove
J2 jumper and wire in thermostats as is the common practice with
other fan coils. To ensure motor operation if any 1 of the inputs is
energized, motor will sense input W1 or W2 and run.
In the event that electric heating is called for by thermostat while
heat pump is also operating in either heating or defrost mode,
electric heating signal will appear at motor connector pins 6 and 7
(W1) and/or pins 4 and 5 (W2) as described previously. If
necessary, the motor will modify its airflow output to provide an
airflow which is defined as safe for operation of electric heater.
CFM SELECT CONFIGURATION TAPS
The CFM Select taps are used by installer to configure system. The
ICM2 is capable of discerning half cycle sine wave on some of its
inputs and uses this capability to modify its operation to a
pre-programmed table of airflows and can be modified in response
to other inputs such as the need for de-humidification.
ICM2 CONTROL POWER
The ICM2 control power is supplied from R circuit through
printed-circuit runs to motor control connector pin 8, through
motor control harness to motor. The C side of low-voltage control
power circuit is connected by printed-circuit runs to motor
connector pins 9, 10 and 11 then through motor control harness to
motor.
LOW-VOLTAGE CIRCUIT FUSING AND REFERENCE
The low-voltage circuit is fused by a board-mounted 5-amp
automotive-type fuse placed in series with transformer SEC2 and
Fig. 25—Easy Select Board Schematic
A96431
AUX1
SYSTEM DIAGRAM
HEATER/MOTOR
12 11 10
9 8 7 6 5 4 3 2 1
SEC1 SEC2
5 AMP
J1
D
H
R
W
1
W
2
Y
1
Y/Y
2
G
O
C
J2
HUM1
AUX2
HUM2
DIODE
LOGIC
AUX HEAT
KW/CFM
AC/HP
SIZE
SYSTEM
TYPE
AC/HP CFM
ADJUST
ON/OFF
DELAY
CONTINUOUS
FAN
GRY
1
/
4
"
1
/
4
"
1
/
4
"
1 /
4
"
1
/
4
"
1
/
4
"
1
/
4
"
Table 7—Connections on Single Barrier Strip Mounted, Cross Slotted, Captive Binding Head
SCREW
TERMINAL
DESCRIPTION
W2 Connection for W2 signal from thermostat
W1 Connection for signal from thermostat W1
Y/Y2
Connection for Y signal from thermostat
or high speed compressor operation
G Connection for G signal from thermostat
O Connection for O signal from thermostat
L
This connection is a field termination for use in connecting L lines of thermostat and outdoor unit together. There is no
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)
31