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ON
NC
NO
C
NC
NO
C
WHT / YLW
WHT / BLU
YLW (C)
ORG (NO)
BLU (NC)
R
C
W
G
Y
Y
G
W
C
R
801
HUMIDISTAT
TERMINAL
THERMOSTAT FURNACE
REMOVE
ADMC
(OPTIONAL)
DUCT SENSOR
ODT
MODULATING
STEAM HUMIDIFIER
DIP SWITCH POSITION
BLOWER
ACTIVATION
RELAY
FAN PACK
24
IN
GND
1
2
12
13
14
1
2
3
4
1
2
3
4
4851
OPTIONAL:
AIR FLOW PROVING SWITCH
#4592
Connect 1/4" plastic tubing from
H (High) side of proving switch
to the airflow sensing probe
located 1.5 duct diameters
downstream of blower. Leave L
(Low) side open to atmosphere.
OPTIONAL:
HIGH HUMIDITY LIMIT SWITCH #4594
Switch breaks C to NC connection when
measured RH is above setpoint RH.
FIGURE 4 – ADMC with Model 801
90-1992
ODT
STEAM HUMIDIFIER FAN PACK
APRILAIRE MODULATING
STEAM HUMIDIFIER
WIRE – 18 AWG ACCEPTABLE FOR 24 VAC APPLICATION.
ADMC
MODULATING
STEAM HUMIDIFIER
DIP SWITCH POSITION
FAN PACK
24VAC
+24V
IN
GND
1
2
6
12
13
14
36.
7
%RH
ON
1
2
3
4
FIGURE 5 – ADMC with Model 866
90-1995
NOTE: PLACE ADMC JUMPER J2 IN THE LEFT POSITION (POWERED).
SEE “JUMPER SETTINGS” ON PAGE 7.
98
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