Spring Air Systems Truflow-TC Installation and Operating May 2021
21
Degrees Fahrenheit.
Touching this icon will ENABLE the PLC to average two exhaust fans for
one output speed reference for the MUA.
This feature allows for a double interlock of the exhaust and supply fans. In this
mode, the exhaust fan will not start until the supply fan proves that it is running. Once the
supply and exhaust are running, the supply heater will only activate if the exhaust fan is
running. This is usually only required with Direct-fired Supply heaters. To enable this
feature
TOUCH
the
DOUBLE i
button and it will turn
GREEN
when active.
Temperature Node Setting
In order to access the temperature
NODE
settings you need to access the
settings screen and touch the
NODE SETTINGS
icon.
The
NODE
window displays the temperature received from the J-couple on the
hood. The
SET POINT
icon is
used to adjust the starting point for
the speed to begin increasing. The set point represents 4 mA or the lowest speed
for the VFD. The
OUTPUT
window displays the mA reference that is used for
the VFD speed.
Setting Auxiliary mA Values
In order to access the Auxiliary mA value for output to the MUA VFD as a speed
reference, you need to access the settings screen and touch the
AUX mA
VALUES
icon.
Touching the
K1 AUX mA
icon displays the setting screen. From
here, you can adjust the
MIN
and
MAX
mA settings that are sent to
the Auxiliary Output on terminals E and F in the RPD panel.
Touching the number box for
MIN
or
MAX
will open a pop-up window that will allow
entering a number between 4.0 and 20.0. This will override the
READ
value and change
the
OUTPUT
number.
