Iseries Smart Actuator - Bard Q-TEC Series Literature Assembly

iSERIES SMART ACTUATOR

Power Up and Dehum Request
Whenever the iSeries-S is powered up, the LED turns
green and the control starts operation (see Figure
28). The power to the iSeries Smart Actuator is being
supplied through the sensor side of the R and C of the
modulating water line board. The supply sensor and
sensor common input is also being supplied by the
modulating water line board when the unit is operating
in dehumidification.
Based on the resistance being supplied through the SU
and SC terminals of the modulating water line board,
the iSeries Smart Actuator modulates to maintain the
setpoint of the iSeries Smart Actuator.
FIGURE 28
iSeries Smart Actuator Electrical Terminals
BOILER
POWER = GREEN
SUPPLY
SENSOR
ERROR
OUTDOOR
STATUS LIGHT
C
R
24 VAC
POWER INPUT
= RED
SENSOR
COMMON
MIS-4135
Setpoint
As previously mentioned, the iSeries Smart Actuator
operates the valve to maintain a fixed setpoint. The
setpoint temperature is set using the setpoint dial
located on top of the actuator. The setpoint range
available is from 80ºF to 180ºF. The factory set
setpoint for the actuator is indicated in Figure 29.
Please adjust this setting to maintain the desired
dehumidification supply air temperature of 70ºF during
set-up.
FIGURE 29
iSeries Smart Actuator Temperature Setpoint
Sensor Warning
Do not apply power to the sensor terminals of the
iSeries Smart Actuator. If voltage is applied to these
terminals, the iSeries Smart Actuator SUPPLY,
SETBACK and/or SENSOR COMMON, the actuator will
be damaged.
Dehumidification
For sequence of operation of dehumidification, refer to
the Dehumidification section beginning on page 40.
MIS-4135
MIS-4136
Manual 2100-738A
Page 39 of 71