Titus Fan Powered Term. IOM - Manual (Page 5)

TU-FB-IOM 08-26-13
5 of 9
Manual / Unit PWM Signal Interface Board
The Manual PWM interface board allows accurate manual
adjustment and monitor of fan with the ECM Motor.
The Manual interface board features a 4 digit LED
numerical display to allow easy reading in dark spaces.
Watch the display and set the flow index with a screwdriver
adjust. Twenty seconds later, the display shows the
motor RPM. Then, the display periodically alternates
between the flow index and motor RPM.
Operation
ECM motors configured for Vspd operation are
factory configured for external torque or airflow
adjustment. A numerical flow index accurately adjusts the
fan to the desired torque or airflow. The flow index is a
number from 0-100 having a linear relationship to the
minimum to maximum torque or airflow range specified by
Titus. Refer to the fan specifications, data and charts to
convert the flow index to torque or mass airflow.
The Manual PWM interface board allows local on/off and
fan airflow adjustment. Rotating a single screwdriver
adjuster changes the variable output signal to the motor
from off to full output. While rotating the adjuster, a
numerical flow index is locked on the illuminated
numerical display. After adjustment, the display
shows fan RPM.
TU-LSC-IOM
ECM Overview and Setup (Cont.)
24VAC
Power Supply
Signal
Communication
connector to
ECM Motor
RPM/CFM Indicator
RPM/CFM
Adjustment
Remote PWM Signal Interface Board Details
The remote interface allows industry standard 0-10Vdc
automation signals to adjust and monitor ECM Motor.
The interface board provides remote adjustment of the
ECM output from 0% to 100% of the programmed control
range. A signal lamp on the control continuously flashes
out the flow index
2
. Instruments are not required to read
the flow index. A 0-10Vdc signal connects RPM to the
automation control. Jumpers allow the Interface to be
configured for 0-10Vdc automation signal, 2-10Vdc
automation signal, and manual/override control. The
interface can also be used for stand-alone manual control.
The green lamp continuously indicates the flow index. After
a pause, the lamp flashes out the tens digit, then the units
digit of a number between 1 and 99. Long flashes
represent the tens digit, and short flashes represent the
units digit. For example, a flow index of 23 flashes two
longs, then three shorts.
Two extra long flashes indicate a flow index of 0. An extra
long flash and ten short flashes indicates a flow index of
100. The lamp flashes the signal that was present when
the flash sequence started.
Turning Adjust controls the ECM motor to the manually
adjusted setting. The manual setting has authority for 15
minutes.Set the unit to full heating (maximum induction).
Adjust and set remote balancing dampers, if present.
Adjust the speed control to deliver the required CFM by
measuring air quantity at the room outlets.
Signal
Communication
connector to
ECM Motor
24VAC Power Supply
Control Signall
Jumper Link
Control Signal Type
RPM Out
24VAC Aux Power
Manual Adjust