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Step Display Description Values
9
Set On/Off function enable or disable:
Display shows “enable on off control
mode”.
You can enable or disable the humidistat
On/Off function in the operation mode. If
Enable (YES), the humidistat can be turned
On/Off in operation mode. If Enable (NO),
the humidistat cannot be turned OFF in the
operation mode.
If you have selected dehumidify only at
Step #6, go directly to Step #11.
Default setting: Enable (YES)
10
Humidify proportional band:
Display shows “humidty control ramp” and
the value of the humidification proportional
band and the Humidify symbol is displayed.
Select the desired proportional band.
If you have selected humidify only at
Step #6, go directly to Step #12.
Proportional band: 2 to 10%RH
Increment: 0.5%RH
Default setting: 5.0%RH
11
Dehumidify proportional band:
Display shows “dehumi control ramp” and
the value of dehumidification proportional
band and the Dehumidify symbol is displayed.
Select the desired span for the dehumidify
ramp.
Proportional band: 2 to 10%RH
Increment: 0.5%RH
Default setting: 5.0%RH
12
Control dead band:
Display shows “control dead band” and
its value.
Humidify/dehumidify symbols are also
displayed since this value applies to both.
Please select the desired dead band value.
If you have selected dehumidify only at
Step #6, go directly to Step #14.
Dead band range: 0.3 to
5.0%RH
Increment: 0.1%RH
Default setting: 0.3%RH
13
Minimum voltage of humidify modulating
output:
Do not change setting for Aprilaire
Model 801 Modulating Steam Humidifier.
Display shows “min vdc analog ao1 output”
and the value of the minimum voltage of the
signal “0.
0” for 0 to 10 Vdc or “2.0” for 2 to 10
Vdc. Humidify symbol is also displayed.
If you have selected humidify only at
Step #6, go directly to Step #15.
Range: 0.0 or 2.0 Volt
Default setting: 0.0 Volt
Step Display Description Values
14
Minimum voltage of dehumidify
modulating output:
Do not change setting for Aprilaire
Model 801 Modulating Steam Humidifier.
Display shows “min vdc analog ao2
output” and the value of the minimum
voltage of the signal “0.
0” for 0 to 10 Vdc or
“2.
0” for 2 to 10 Vdc. Dehumidify symbol is
also displayed.
Select the desired value of the minimum
voltage of AO2 output.
Range: 0.0 or 2.0 Volt
Default setting: 0.0 Volt
15
Minimum voltage of AO3 output:
Do not change setting for Aprilaire
Model 801 Modulating Steam Humidifier.
Display shows “min vdc analog ao3
output” and the value of the minimum
voltage of the signal “0.
0” for 0 to 10 Vdc or
“2.
0” for 2 to 10 Vdc. Humidify symbol is also
displayed.
Select the desired value of the minimum
voltage of AO3 output.
If you have selected dehumidify only at
Step #6, go directly to Step #17.
Range: 0.0 or 2.0 Volt
Default setting: 0.0 Volt
16
Minimum voltage of AO4 output:
Do not change setting for Aprilaire
Model 801 Modulating Steam Humidifier.
Display shows “min vdc analog ao4
output” and the value of the minimum
voltage of the signal “0.
0” for 0 to 10 Vdc or
“2.
0” for 2 to 10 Vdc. Humidify symbol is also
displayed.
Select the desired value of the minimum
voltage of AO4 output.
Range: 0.0 or 2.0 Volt
Default setting: 0.0 Volt
1514
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