INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVT, (F/G)9MXT, (F/G)9MXE
440 01 4001 05
35
Specifications subject to change without notice.
Figure 40
Example of Variable Speed Furnace Control for ECM Blower Motor
−
(F/G)9MVT
24
ï
V THERMOSTAT
PL2
ï
HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
115
ï
VAC (L2) NEUTRAL
CONNECTIONS
115
ï
VAC (L1) LINE
VOLTAGE CONNECTIONS
EAC
ï
1 TERMINAL
(115
ï
VAC 1.0 AMP MAX.)
PL1
ï
LOW VOLTAGE MAIN
HARNESS CONNECTOR
TERMINALS
HARNESS CONNECTOR
TRANSFORMER 24
ï
VAC
CONNECTIONS
3
ï
AMP FUSE
STATUS AND COMM
LED LIGHTS
SW1 SETUP
SWITCHES AND
AND ECM BLOWER
DELAY
MODEL PLUG
CONNECTOR
AIR CONDITIONING
(A/C) AIRFLOW
SETUP SWITCHES
COMMUNICATION
CONNECTOR
CONTINUOUS FAN
BLOWER OFF
ï
F) AIRFLOW
SETUP SWITCHES
OUTDOOR
(C
IR TEMP
CONNECTOR
HUMIDIFIER
TERMINAL (24
A
VAC
0.5 AMP MAX.
FLASH
UPGRADE
CONNECTOR
(FACTORY
ONLY)
SW4 SETUP
ï
SOFTWARE
VERSION
PART NUMBER AND
DATE CODE WWYY
SWITCHES
L11F081
Figure 41
Example of Two
−
Stage Furnace Control for ECM Blower Motor
−
(F/G)9MXT
TEST / TWIN
HUM
PLT
PL1
W2 Y1 DHUM G COM W/W1 Y/Y2 R
24V
FUSE 3
−
AMP
EAC
−
2
EAC
−
1
L1 BL
−
1 XFMR
L2
COM
HI HT
COOL
LO H T
SPARE 1
24V MTR
TAPS
BLOWER SPEED
TERMINALS
115
−
VAC (L2)
NEUTRAL
CONNECTIONS
LED OPERATION
& DIAGNOSTIC LIGHT
3
−
AMP FUSE
24
−
V THERMOS TAT
TERMINALS
SET UP SWITCHES
THERMOSTAT TYPE (TT)
AND HEAT OFF
−
DELAY
TWINNING AND/OR
COMPONENT TEST
TERMINAL
HUMIDIFIER TERMINAL
(24 VAC 0.5 AMPS MAX)
TRANSFORMER
24 VAC CONNECTIONS
P
−
1 LOW VOLTAGE
P2
−
HOT SURFACE
IGNITER/INDUCE R
MOTOR CONNECTION
115 VAC
BLOWER POWER (BL1)
CONNECTION
115 VAC LINE (L1)
INPUT
TT
OFF
DLY
ON
OFF
1 2 3
IDR
HSIR
IDM
IHI/LOR
PL2
1
HSI HI LO
1
EAC TERMINAL
115 VAC 1.0 AMP
MAX
115 VAC
TRANSFORMER
PRIMARY
SPARE 2
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HUM
115 VAC HUM
COM/BLUE 24VAC/RED
CO
M
24V
24VAC
SW1
SW1
L12F037
ON
OFF