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Model 1000 Humidifier Installation Manual
Installing The Control, Cont.
6 A
ON-OFF
SWITCH
ACC
EAC
115v.
(HOT)
60CY.
C
L1
6 C
115v.
(HOT)
60CY.
L2
12500 AIR
PRESSURE
SWITCH
SNSR
NO
C
HUM
AC N
AC L
!
WARNING: All Wiring Should Comply With Local Electrical Codes.
6A With Furnace Circuit Board
Use with mechanical humidistat only. On furnaces with output terminals ACC, or EAC check output voltage
to determine that terminals are 115V. Connect on-off switch in series with the hot wire. Install humidistat and
connect to yellow wires on humidifier.
6B With Constant Power To Humidifier
Use with mechanical humidistat only. Mount a junction box and 115V grounded outlet. Connect the on-off
switch in series with the hot or black wire. Install a field supplied 24V relay and attach to HUM and C on the
furnace control board. Install humidistat and connect one side to one yellow wire on humidifier. Connect the
other side of the humidistat to one end of switch side of the relay. Connect the other switch side of the relay
to the remaining yellow wire on humidifier.
CAUTION: Red humidifier leads are not used for this wiring method.
!
CAUTION: Do not touch red wires together. Damage to the humidifier will result.
6C With Electronic Humidistat - Pressure Sensing
On furnaces with a two speed blower, the humidifier and a Model 12500 Air Pressure Switch may be wired
from a continuous 115V power source. Install the on/off switch in series with hot or black wire and Air
Pressure Switch in series with the humidistat circuit. The Air Pressure Switch will detect furnace operation
and supply power to the humidifier accordingly.
6D With Electronic Humidistat - Current Sensing
On furnaces with a two speed blower, the humidifier may be wired from a continuous 115V power source.
Install the on/off switch in series with the hot or black wire. Install the GA50 Current Sensing Relay in series
with the humidistat circuit. The Current Sensing Relay will detect furnace operation and supply power to the
humidifier accordingly.
6
Breathe Healthier!
Residential Whole-House Indoor Air Quality
HUMIDIFIER
120v. OUTLET
GRD
SNSR
HUM
ON-OFF
GRD
AC N
HUMIDIFIER
SWITCH
AC L
120v. OUTLET
HUMIDIFIER CONTROL LEADS
(YELLOW WIRES)
HUMIDISTAT POWER LEADS
(RED WIRES 24 VAC)
ON-OFF
SWITCH
L1
115v.
(HOT)
60CY.
C
FURNACE
FIELD SUPPLIED
CONTROL BOARD
RELAY 24V COIL, N.O.
HUM
6 B
24V.
C
60CY.
GA50 CURRENT
HUMIDIFIER CONTROL LEADS
SENSING RELAY
(YELLOW WIRES)
HUMIDISTAT POWER LEADS
(RED WIRES 24 VAC)
ON-OFF
SWITCH
L1
6 D
115v.
(HOT)
60CY.
L2
HUMIDIFIER
120v. OUTLET
GRD
HUMIDISTAT
NC
YELLOW WIRES
C
NO
FROM HUMIDIFIER
COMMON LEAD
MULTI
C
SPEED
HI
BLOWER
LO
MOTOR
HUMIDIFIER
120v. OUTLET
GRD
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