INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVE
34
440 01 4401 02
Specifications subject to change without notice.
Figure 40
Isolation Relay for Humidifiers with Internal Power Supply
24 V
Coil
To Humidifier Leads
To Com/24V Screw Terminal
on Thermostat Strip
To HUM 24 VAC Terminal
On Furnace Control Board
To Humidifier Leads
A11157
Figure 41
Example of Variable Speed Furnace Control for Variable Speed ECM Blower Motor
L14F003
24-V THERMOSTAT
TERMINALS
PL2 – HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
115-VAC (L2) NEUTRAL
CONNECTIONS
115-VAC (L1) LINE
VOLTAGE CONNECTIONS
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
PL1 – LOW VOLTAGE MAIN
HARNESS CONNECTOR
TRANSFORMER 24-VAC
CONNECTIONS
3-AMP FUSE
STATUS AND COMM
LED LIGHTS
SW1 SETUP
SWITCHES AND
BLOWER OFF-
DELAY
MODEL PLUG
CONNECTOR
COMMUNICATION
CONNECTOR
AIR CONDITIONING (A/C) &
CONTINUOUS FAN (CF)
AIRFLOW SETUP SWITCHES
OUTDOOR
AIR TEMP
CONNECTOR
HUMIDIFIER
TERMINAL (24-VAC
0.5 AMP MAX.)
ACRDJ – AIR
CONDITIONING
RELAY DISABLE
JUMPER
FLASH
UPGRADE
CONNECTOR
(FACTORY
ONLY)
SOFTWARE
VERSION