CaptiveAire RTULink, Installation, Operation And Maintenance Manual

Page: 9 / 56

9
RTULink to RTU Wiring
The RTULink will
need to be wired to
the RTU in order to
send control signals.
Table 1 details the
“RTU” side terminals
on the RTULink and
the corresponding
terminal definitions.
Figure 5 shows the
wiring diagram for
the RTULink to RTU
control wiring. Not all
terminals will be
utilized on every unit.
Refer to the specific
RTU and thermostat
documentation to
determine which of
the terminals are
relevant to the
application.
When certain unique
options are present,
it is possible for one
or more of these
terminals to be
repurposed for a
different use. View
the remaining
subsections to
determine which
features will repurpose
board terminals.
Figure 5. RTULink
– RTU Wiring
Table 1. RTULink to RTU Wiring Terminals
TERMINAL
LABEL
SIGNAL
VOLTAGE
RTULINK
INPUT/OUTPUT
SIGNAL DESCRIPTION
R 24 VAC INPUT
24VAC THERMOSTAT TRANSFORMER
HOT
C COMMON INPUT
24VAC THERMOSTAT TRANSFORMER
NEUTRAL
G 24 VAC OUTPUT BLOWER
Y1 24 VAC OUTPUT 1ST STAGE COOLING
Y2 24 VAC OUTPUT 2ND STAGE COOLING
Y3 24 VAC OUTPUT 3RD STAGE COOLING
W1 24 VAC OUTPUT 1ST STAGE HEATING
W2 24 VAC OUTPUT 2ND STAGE HEATING
W3 24 VAC OUTPUT 3RD STAGE HEATING
E 24 VAC OUTPUT EMERGENCY HEAT
O/B 24 VAC OUTPUT HEAT PUMP REVERSING VALVE
AUX 24 VAC OUTPUT AUXILIARY
AIRFLOW 24 VAC INPUT AIRFLOW PROVING
ALARM 1 24 VAC INPUT CONFIGURABLE ALARM
ALARM 2 24 VAC INPUT CONFIGURABLE ALARM