INSTALLATION INSTRUCTIONS
69-1341EF-01
H8908A/B Humidistat
H8908C/D Dehumidistat
APPLICATION
The H8908 family of low-voltage humidistats/
dehumidistats provide accurate control of whole house
humidifiers, dehumidifiers, and ventilators. They have a
snap-acting, dust-proof SPST switch and can be
mounted to a duct or wall.
Before Installing this Product...
1.
Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2.
Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3.
Installer must be a trained, experienced service
technician.
CAUTION
Personal Injury Hazard.
Power supply can cause electrical shock.
Disconnect power supply before beginning
installation.
NOTE: The H8908 electrical connections are not
shared with the thermostat.
Fig. 1. H8908A,D control.
Fig. 2. H8908B,C control.
M24726
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
M13371
CASE REMOVAL
SLOT
HOLE FOR WIRING
THE DUCT MOUNTING
INSTALLATIONS
