6
Model 570 Humidifier Installation Manual
Breathe Healthier! Residential-Whole House Indoor Air Quality
Installing / Wiring The Control
GFX3 (Automatic Models)
MHX3C (Manual Models)
24V OUTPUT FROM HUMIDIFIER (RED WIRES) OR
727-58 24 V. TRANSFORMER WITH CONSTANT POWER
OR 24 VAC POWER SUPPLY WITH CONSTANT POWER
HUMIDIFIER CONTROL LEADS
(YELLOW WIRES)
OUTDOOR TEMP. SENSOR
(NOT USED IN MANUAL MODE)
AC
L
AC
N
HUM
SNSR
WIRE JUMPER
7 A
7 C
7 B
7 D
(HOT)
115v.
60CY.
ON-OFF SWITCH
COMMON LEAD
FURNACE
C
HI
LO
GA50
CURRENT
SENSING
RELAY
MULTI
SPEED
BLOWER
MOTOR
AC L
AC N
HUM
SNSR
24V. SOLENOID VALVE
727-58 24 V. TRANSFORMER
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
AC L
AC N
HUM
SNSR
24V. SOLENOID VALVE
727-58 24 V. TRANSFORMER
L1
C
NO
(HOT)
L2
115v.
60CY.
ON-OFF SWITCH
12500 AIR
PRESSURE SWITCH
AC L
AC N
HUM
SNSR
24V. SOLENOID VALVE
727-58 24 V. TRANSFORMER
R
FURNACE
CONTROL BOARD
C
24v.
60CY.
AC L
AC N
HUM
SNSR
24V. SOLENOID VALVE
FURNACE
BOARD
W
WIRE JUMPER
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
OUTDOOR TEMP. SENSOR
N
W 24v.
60CY.
ACC
EAC
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
COMMON LEAD
FURNACE
C
HI
LO
GA50
CURRENT
SENSING
RELAY
MULTI
SPEED
BLOWER
MOTOR
24V. SOLENOID VALVE
HUMIDISTAT
24 V. TRANSFORMER
(HOT)
C
115v.
60CY.
ON-OFF SWITCH
24V. SOLENOID VALVE
24V. SOLENOID VALVE
24 V. TRANSFORMER
L1
C
NO
(HOT)
L2
115v.
60CY.
ON-OFF SWITCH
12500 AIR
PRESSURE SWITCH
24 V. TRANSFORMER
HUM
FURNACE
CONTROL BOARD
C
24v.
60CY.
24V. SOLENOID VALVE
HUMIDISTAT
HUMIDISTAT
HUMIDISTAT
FURNACE
BOARD
7 E
7 G
7 F
7 H
WIRE
JUMPER
WIRE
JUMPER
WIRE
JUMPER
7A-7D Electronic Humidistat
7A - To furnace control board 24V
7B - To constant power using 24V transformer and pressure switch
7C - To furnace control board 115V with 24V transformer
7D - To constant power using 24V relay and current sensing relay
7E-7H Manual Humidistat
7E - To furnace control board 24V
7F - To constant power using 24V transformer and pressure switch
7G - To furnace control board 115V with 24V transformer
7H - To constant power using 24V relay and current sensing relay
!
WARNING: ALL WIRING SHOULD COMPLY WITH LOCAL ELECTRICAL CODES.
Thin Gasket
Face
FIG. 1
WALL
MOUNT: Use
Outer & Inner Portions
DUCT
MOUNT: Use
ONLY Outer Portion
Mounting
Base
Thick Gasket
DUCT
MOUNT ONLY
