GeneralAire Elite Serie Mode D'emploi page 2

5
GFX3 ELECTRONIC HUMIDISTAT
HUMIDIFIER CONTROL LEADS
(YELLOW WIRES)
24V OUTPUT FROM HUMIDIFIER (RED WIRES) OR
727-58 24 V. TRANSFORMER WITH CONSTANT POWER
OR 24 VAC POWER SUPPLY WITH CONSTANT POWER
6
6A
ACC
EAC
115v.
(HOT)
60CY.
C
L1
6C
115v.
(HOT)
60CY.
L2
12500 AIR
PRESSURE
SWITCH
SNSR
NO
C
HUM
AC N
AC L
INSTRUCTIONS FOR WIRING HUMIDIFIER
NOTE: 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 24 volt 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 the
relay to the remaining yellow wire on humidifier. Red humidifier leads
are not used for this wiring method. 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 115 volt 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 115 volt 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.
OUTDOOR TEMP. SENSOR
(NOT USED IN MANUAL MODE)
ON-OFF
HUMIDIFIER
SWITCH
120v. OUTLET
ON-OFF
HUMIDIFIER
SWITCH
120v. OUTLET
HUMIDIFIER CONTROL LEADS
(YELLOW WIRES)
HUMIDISTAT POWER LEADS
(RED WIRES 24 VAC)
WALL MOUNT PLATE
STANDARD FOR CANADA
OPTIONAL ACCESSORY FOR
USA
ON-OFF
SWITCH
L1
115v.
(HOT)
60CY.
C
FURNACE
CONTROL BOARD
6B
HUM
24V.
GRD
C
60CY.
HUMIDIFIER CONTROL LEADS
(YELLOW WIRES)
SNSR
HUM
GRD
AC N HUMIDISTAT POWER LEADS
(RED WIRES 24 VAC)
AC L
L1
6D
115v. (HOT)
60CY.
L2
7 7
Replace evaporator pad assembly and humidifier cover. Insert low voltage
six connector wiring harness from cover into chassis solenoid harness.
8
Turn on water supply and plug in power cord to check operation of
humidifier. Set humidistat to a demand setting. With the furnace off, the
solenoid valve should be closed and the humidifier fan not running. Start
the furnace, the solenoid valve should open and the humidifier fan run
when the blower or burner circuit is energized. Check flow of water
through distributor trough and evaporator pad. The standard GA4231
yellow orifice will supply approximately 3.5 GPH of water at a line water
pressure of 60 psi. For low water pressures (20-40 psi) a larger orifice
GA4299 is available to provide the same flow. Leave humidistat set at the
recommended setting.
MHX3 MANUAL HUMIDISTAT
HUMIDIFIER
120v. OUTLET
FIELD SUPPLIED HUMIDISTAT
NC
RELAY 24V COIL, N.O.
C
NO
GA50 CURRENT
COMMON LEAD
SENSING RELAY
ON-OFF
SWITCH
DUCT MOUNT PLATE
STANDARD FOR USA
OPTIONAL ACCESSORY FOR
CANANDA
GRD
YELLOW WIRES
FROM HUMIDIFIER
MULTI
C
SPEED
HI
BLOWER
MOTOR
LO
HUMIDIFIER
120v. OUTLET
GRD