Checkout; Humidity Control Adjustment; Setpoint Adjustment; Operation - Honeywell H8908ASPST - Manual Humidistat Control Installation Instructions Manual

H8908A/B HUMIDISTAT H8908C/D DEHUMIDISTAT

CHECKOUT

Turn the H8908 dial to "ON" to test proper installation.
See Fig. 20.
You will hear an audible click if installed correctly, and
water will begin flowing to the humidifier.
Fig. 20. Turn humidistat on.
69-1341EF—01

OPERATION

Humidity Control Adjustment

To maintain optimal humidity levels without causing
condensation on cold surfaces such as windows, the
homeowner must adjust the setpoint as the outdoor
temperature changes.
To reduce the relative humidity, lower the setpoint
approximately three percent relative humidity every 24
hours. To increase the relative humidity, increase the
setpoint approximately three percent relative humidity
every 24 hours.

Setpoint Adjustment

Set the humidity setpoint according to the prevailing
outdoor temperature. Recommended settings are
available on the control and in the table below.
M24723
6
Table 1. Recommended Humidity
Controller Settings.
Outdoor Temperature
°F °C
-20 -29
-10 -23
0 -18
+10 -12
+20 -7
>+20 >-7
Outdoor Temperature
°F °C
+70 +21
+75 +24
+80 +27
+85 +29
+90 +32
>+100 >+38
Recommended
H8908A,B Setpoints
15
20
25
30
35
40
Recommended
H8908C,D Setpoints
50
40
35
30
25
20