H1008A,D AUTOMATIC HUMIDITY CONTROL
69-1185EF 4
6
SETTINGS
Adjustment
To adjust the frost factor:
Set the frost factor dial to 10 and use Table 1 to adjust
the frost factor only one setting at a time.
Increase the dial setting for more humidity, or
Decrease the setting if moisture starts to build up on
the inside of your windows.
For more precise humidity adjustments, set the frost
factor between the dial settings.
Allow two days for the humidity level to subside before
making further adjustments.
Once the frost factor is set, no further adjustment is
needed.
The H1008A,D Automatic Humidity Control with
Hum Software is designed to provide an
optimal 50°F (10°C) dewpoint. It automatically adjusts the
humidity level to prevent window frost or condensation.
The H1008D activates a ventilator or dehumidifier to
lower the indoor humidity level when the house dew-point
rises above 58°F. Outdoor temperature is inferred (without
the need for an outdoor sensor), or measured (with
optional outdoor sensor) by the Hum Software.
Indoor humidity and temperature information is measured
by sensors located on the back of the control. The frost
factor set by using the frost factor dial allows for
variables in furnace oversizing, window insulation and
average daily outdoor temperature. The Automatic
Humidity Control with Hum
!
Software requires
an initial adjustment period.
SYSTEM STATUS
The control has a green indicator light that flashes to
indicate system status. Flash frequency represents
system status. See Table 2 for status descriptions.
Table 1. Recommended Frost Factor Adjustment.
Humidity Level
Recommended
Adjustment
Condensation on
windows.
Decrease the frost factor dial
by one setting.
Insufficient humidity.
Increase the frost factor dial
by one setting.
Table 2. System Status.
System Status
Flash Frequency
Error
1/8 second on,
1/8 second off.
Standby
1 second on,
1 second off.
Test
4 seconds on,
1 second off.
Steady on with call for
heat or fan.
Call for humidification/
dehumidification
Steady on.
Off
Off
