Instruction manual

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Table 6: Keypad/display security levels
Level Display What is restricted? Password
0
uo
Default level (access all)
10
1
u1
Does not allow set point offset changes; also locks out keypad/dis-
play menu access.
21
2
u2
Does not allow set point offset changes nor MODE key changes; also
locks out keypad/display menu access
32
3
u3
Does not allow set point offset changes nor MODE and FAN key
changes; also locks out keypad/display menu access.
43
Figure 2: Changing keypad/display security levels
ON/STOP Key and LED
Use the ON/STOP key to toggle the UVC between OFF mode and running (Application
Mode Input). The ON/STOP LED is off when the UVC is in the OFF mode.
Note: When the UVC is in the OFF mode, the effective heating set point appears in the display.
All other LEDs are switched off.
– The UVC archives each change to the keypad/display FAN and MODE keys. When the
ON/STOP key is used to bring the unit out of OFF mode, the UVC implements the last
active fan and unit modes.
– Each time the UVC power cycles, the UVC is in the auto fan and auto unit modes when
power is returned.
WARNING
Off mode is a “stop” state for the unit ventilator. It is not a “power off” state. Power may still be provided
to the unit.
FAN Key
Use the FAN key to toggle through each of the fan speeds (Fan Speed Command
Input): Auto, Low, Medium, and High.
MODE Key
Use the MODE key to toggle through the keypad/display accessible unit modes (Heat/
Cool Mode Input): Auto, Heat, Cool, and Fan Only.
Arrow Keys
Use the arrow keys to scroll between parameters and to adjust parameters.
FUNC Key
Use the Func key to view the actual space temperature or to conrm selection and
changes to user-adjustable parameters.