Manual

ACU-STEAM HUMIDISTAT, version A
Features
 State of Art digital RH sensor
 ROOM or DUCT mounting
 Reprogrammable Microcontroller
 Potentiometer Set-point setting
 Out-door temperature sensor for Set-point Reset
 Green (ON/OFF) and Red (warning) status LEDs
Specifi cations
Set-point range. . . . . . . . . . . . . . . 20% to 50% Relative Humidity
Accuracy. . . . . . . . . . . . . . . . . . . . ±4.5%, without calibration
Linearity . . . . . . . . . . . . . . . . . . . . ±1% in the Set-point range
Differential % RH. . . . . . . . . . . . . ±2%
Outdoor Temp. Reset Range between -9 ˚F (-23 ˚C) to 27 ˚F (-3 ˚C)
Outdoor reset Temperature vs. Set point change
28 ˚F (-2 ˚C) and warmer No change
27 ˚F (-3 ˚C) to 23 ˚F (-5 ˚C) 42% max,
22 ˚F (-6 ˚C) to 18 ˚F (-8 ˚C) 38% max,
17 ˚F (-9 ˚C) to 12 ˚F (-11 ˚C) 34% max,
11 ˚F (-12 ˚C) to 5 ˚F (-15 ˚C) 30% max,
4 ˚F (-16 ˚C) to -2 ˚F (-19 ˚C) 26% max,
-3 ˚F (-20 ˚C) to -9 ˚F (-23 ˚C) 22% max,
-9 ˚F (-23˚C) and colder 20% max.
NOTE: these ranges can vary by ±2 %.
The Outdoor Temperature sets the maximum set point of RH internally.
If the Dial position is higher, the actual set point will be limited as above.