18 AWG 2-Conductor Wire
Wire Nuts
Diagram B
FOR EHUMD500 WITH 120VAC OUTPUT TERMINALS
FAN POWERED HUMIDIFIER WIRING DIAGRAM
Notes:
Enable HUM Control through the * CONT900 Installer
Setup Menu:
(ISU0372
Option 1 - RH Setpoint
Option 2 - Dewpoint Control)
See advanced features in *CONT900 Installer's Guide
for operating details.
HUMIDIFIER CORD
FAN POWERED
HUMIDIFIER
PLUGGED INTO
120 VAC POWER SOURCE
Wire Nuts
(BR)
HUM (BK)
HUM (WH)
(BR)
Blower Compartment
Furnace
4x4 Line Voltage Junction Box in
3-Stage Communicating Furnace
Field Supplied
120VAC
TRANSFORMER
(Furnished)
24VAC
EHUMD500A HUMIDIFIER INSTALLATION WITH
COMMUNICATING SYSTEM FURNACE
EHUMD500A HUMIDIFIER INSTALLATION WITH NON-COMMUNICATING SYSTEM AIR HANDLER
EHUMD500A HUMIDIFIER INST
ALLA
TION
WITH
NON-COMMUNICA
TING SYSTEM AIR HANDLER
24V
ODT
H
C
R
24VAC
120VAC
(BR)
(BR)
Wire Nuts
1/4 inch Female Quick Connects
Note: Insulated Terminals are recommended
18 AWG 2-Conductor Wire
Note:
Verify that switch “A” is
in the BYPASS Position
SWITCH “A”
BYP
ASS
PO
WER
Diagram A1
AS NEEDED FOR EHUMD500 WITH NON-COMMUNICATING AIR HANDLER
Circuit Board Inside Non-Communicating Air Handler
FAN POWERED
HUMIDIFIER
FAN POWERED HUMIDIFIER WIRING DIAGRAM
Field Supplied
TRANSFORMER
(Furnished)
HUMIDIFIER CORD
PLUGGED INTO
120 VAC POWER SOURCE
EAC
HUM
90-1928
