Humidity Control Adjustment; Setpoint Adjustment; Operation And Checkout - Honeywell H8908B Installation Instructions Manual

H8908B HUMIDISTAT/H8908C DEHUMIDISTAT
CHRONOTHERM ® IV THERMOSTAT
H8908C
B O
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
1
PROVIDE OVERLOAD PROTECTION AND
DISCONNECT MEANS AS REQUIRED.
Fig. 10. Typical parallel wiring of humidity controller
with Chronotherm® IV Thermostat for
dehumidification and mildew control.
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.
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
69-1341EF G.H. 8-02
W Y R
G
FAN
RELAY
COIL
1
R
G
H8908C
FAN
RELAY
COIL
1
VENTILATOR/DEHUMIDIFIER
DEHUMIDISTAT
TERMINALS
M13383
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
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

M13366
Set the humidity setpoint according to the prevailing
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
M13367
least one complete cycle to make certain that all
components are functioning properly.
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Controller Settings.
Recommended
Humidity
°C Controller Setting
-29
-23
-18
-12
-7
>-7
www.honeywell.com/yourhome
15
20
25
30
35
40