2
INSTALLATION
OEM REPLACEMENT INSTRUCTIONS - 50M56U-801
Lennox Model
Furnace using
control:
NOTE: Ignitor must be replaced with
120V Ignitor
(Recommend 21D64-2) 75M21 Ignitor
- Remove existing control and verify
part number to be replaced
- Reference Wiring diagram
- Install harness
0115-0303
into the
Inducer and Ignitor 4-pin connector
- Plug in remaining connections
81W03
1012-969A
17W70
100973-01,02
1012-969
78M4701
78M1701
75M1701
Lennox,
Armstrong,
Ducane
Furnaces
using control:
- Remove existing control and verify
part number to be replaced
- Reference Wiring diagram
- Plug in all connections.
56W19
94W83
R47582-001
103085-01
1012-967
103085-02
103085-03
1012-83-9673A
1012-977A
81W11
56L8501
12L4201
50A55-120
80M2701
1012-968
Lennox Model
Furnace using
control:
- Remove existing control and verify
part number to be replaced
- Reference Wiring Diagram
- Install harness
0115-0303
into the
Inducer and Ignitor 4-pin connector.
- Install harness
0115-0302
into the
main 12-pin connector.
- Plug in remaining connections.
74W03
103098-01
1195-100
1195-83-100A
Follow Appliance Manufacturer’s recommended installation
or service instructions to ensure proper operation after
installation
All installation procedures should be carried out ONLY
by a qualified Heating and Air Conditioning contractor
or licensed electrician, according to Local and National
Electrical codes and Ordinances.
WARNING
!
FIRE HAZARD
• Do not exceed the specified voltage.
• Replace existing control with exact model and dash
number.
• Protect the control from direct contact with water
(dripping, spraying, rain, etc.).
• If the control has been in direct contact with water,
replace the control.
• Label all wires before disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
• Route and secure wiring away from flame.
SHOCK HAZARD
• Disconnect electric power before servicing.
• Ensure proper earth grounding of appliance.
• Ensure proper connection of line neutral and line hot
wires.
EXPLOSION HAZARD
• Shut off main gas to appliance until installation is
complete.
WARNING
!
Failure to comply with the following warnings could
result in personal injury or property damage.
