H8908A/B HUMIDISTAT; H8908C/D DEHUMIDISTAT
69-1341EF—07
6
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.
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.
Table 1. Recommended Humidity
Controller Settings.
M24723
Humidity Control
Régulateur d'humidité
-20 F
-10 F
0 F
+10 F
+20 F
Over 20 F
15%
20%
25%
30%
35%
40%
HUMIDITY
SETTING
OUTDOOR
TEMPERATURE
-30 C
-25 C
-20 C
-10 C
-5 C
Over 0 C
Outdoor Temperature
Recommended
H8908A,B Setpoints
°F
°C
-20
-29
15
-10
-23
20
0
-18
25
+10
-12
30
+20
-7
35
>+20
>-7
40
Outdoor Temperature
Recommended
H8908C,D Setpoints
°F
°C
+70
+21
50
+75
+24
40
+80
+27
35
+85
+29
30
+90
+32
25
>+100
>+38
20
