Lennox Merit MPE36 Service Manual page 38

Blower wiring 120VAC
• Note: 120 VAC operation:
• Blue wires N1 & N2 run directly from electrical
junction box to the heater element.
• Orange wire (dummy wire in 120 VAC installation)
also runs directly from the electrical junction box to
the heater element. Orange wire must be capped in
the junction box.
• Black (hot) wire runs from junction box to the control
board and then to the fusible link for the heater
• White (neutral wire) runs from the junction box to the
control board,
From Left:
Black
White
Orange
Blue
Blue