Lennox International Inc. o23v User Manual
Page 24
Page 24
1
2
3
TJERNLUND HORIZONTAL VENTING SYSTEM (SIDESHOT) OPERATION SEQUENCE
:
1.
When 1K2 closes, 120VAC is routed through the relay/timer, electronic ignitor (A73), and the limit switch.
2.
The relay/timer energizes the venter motor.
3.
After the venter motor establishes a draft, the N.O. fan proving switch closes completing the circuit to the burner motor.
1
2
3
FIELD CONTROL HORIZONTAL VENTING SYSTEM OPERATION SEQUENCE
:
1.
When 1K2 closes, 120VAC is routed through the relay.
2.
The relay energizes the venter motor.
3.
After the venter motor establishes a draft, the N.O. fan proving switch closes, completing the circuit to the burner motor and electronic ignitor (A73).