Valent Controls IOM 6 IOM-C1-0616
Part Number 474626
Changing a Setpoint
1. Push any button on the LCD interface to
refresh the display. If the main menu is not
shown, press the MENU button to return to the
main menu.
2. Press Enter to select POINTS.
3. Use ▲ and ▼ as well as PREV and NEXT to
navigate to the various setpoints stored in
the controller.
4. When the desired setpoint is underlined,
press Enter to change the value.
5. Modifications are made by changing one
significant digit at a time. Use ◄ and ► to
move left and right between digits. Use ▲
and ▼ to change the value of the digit.
6. Press Enter to save the change.
Changing the Fan Speed
Each VPR, VPRE, VPRC/P, and VPRX rooftop
unit includes a variable frequency drive (VFD)
for the supply fan. The supply fan speed can be
changed from the LCD.
1. Push any button on the LCD interface to
refresh the display. If the main menu is not
shown, press the MENU button to return to the
main menu.
2. Press Enter to select POINTS.
3. Use the NEXT button and ► right arrow
button to navigate to the FAN OPERATION
screen.
4. Using the ▼button, move the underscore to
SUP FAN MAX and press Enter on the
keypad.
5. Use ◄ and ► to move left and right
between digits. Use ▲ and ▼ to change the
value of the digit.
6. Press Enter to save the change.
Verifying Changes
After making changes to any VFD parameters,
confirm the VFD/fan speed by enabling the fan
to operate. The speed, in Hz, is indicated on the
front of the VFD display. If the controller is
sending a fan speed of 100%, fan speed analog
output should be 10 VDC and the fan speed
should be the design limit.
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