MG2S User Manual

The furnace components shown in Figure 3 will help identify and locate various parts of the furnace. The component you need to
familiarize yourself with is the gas valve. You will use this to turn the furnace on and off. There are no user serviceable parts. All repairs
must be done by a licensed HVAC technician.
Specifications & illustrations subject to change without notice or incurring obligations (11/18).
O’Fallon, MO, © Nortek Global HVAC LLC 2018. All Rights Reserved.
FURNACE COMPONENTS
Figure 3. MG2S Furnace Components
Blower Assembly
Inducer Assembly
Gas Valve
Gas Manifold &
Burner Assembly
ON/OFF Switch
Control Board
Limit Switch
Inline Drain
Assembly
Igniter
Flame Sensor
Roll-Out Switch
Combustion Air Pipe
Exhaust
Vent Pipe
Main Air Limit Switch
24V Transformer
Motor Control Board
GROUND
SENSOR
DHUM_IN
Y1_IN
H_OUT
L2-OUT
L2-IN
L1-IN
L1-OUT
Y1_OUT
Y/Y2_OUT
W_OUT
C
EXPANSION PORT
R
RED
GREEN
CONNECTION TO
FURNACE CONTROL
BOARD
MOTOR WIRING
HARNESS
RED
INPUT TERMINALS
COOL
HEAT
FAN SPEED
OUTPUT TERMINALS
STATUS LIGHTS
12 3
4
56 7
8
OFF ON
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(NEW)