Honeywell H8908B Humidistat Installation Instructions page 4

H8908B HUMIDISTAT H8908C DEHUMIDISTAT
CHRONOTHERM ® IV THERMOSTAT
B O
W Y
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
PROVIDE OVERLOAD PROTECTION
1
AND DISCONNECT MEANS AS REQUIRED.
Fig. 11. Typical series wiring of humidity controller
with Chronotherm® IV Thermostat for
dehumidification and mildew control.
H8908C
Fig. 12. Typical wiring diagram for HR150,
HR200, ER150 and ER200 Ventilator
or HD220 Dehumidifier applications.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis, MN 55408-0524
69-1341 G.H. 10-99 Printed in Taiwan R.O.C.
R
G
H8908C
FAN
RELAY
COIL
1
VENTILATOR/DEHUMIDIFIER
DEHUMIDISTAT
TERMINALS
M13383
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
ADJUSTMENTS
Humidity Control Adjustment
To maintain optimum humidity control 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, reduce the setpoint
approximately three percent relative humidity every 24
hours. To increase the relative humidity, increase the
sepoint approximately three percent relative humidity
every 24 hours.
Setpoint Adjustment
Set the humidity setpoint according to the prevailing
M13367
outdoor temperature. See Table 1 for recommended
settings.
Table 1. Recommended Humidity
Outdoor Temperature
°F
-20
-10
0
+10
+20
>+20
OPERATION AND CHECKOUT
Place the system in operation and observe through at
least one complete cycle to make certain that all com-
ponents are functioning properly.
Controller Settings.
Recommended
°C Controller Setting
-29
-23
-18
-12
-7
>-7
www.honeywell.com
Humidity
15
20
25
30
35
40