Lennox FLEXY II Series User Manual

IOM – FLEXY II – 1007 – E Page 55
GAS BURNER FIRE-UP SEQUENCE
HEATING
: GAS BURNER
Operation
from
cont rol
Thermostat GAZ =Closed
Supply Thermostat Limit?
(Auto Reset)
Fault o n CL I MATI C
Extraction Fan ON
AI R P r e s s u r e S w i t ch ON
Backfire Thermostat ON?
Gas Control
Valv e Closes
BURNER
STOPS
Gas Low Pressure switch?
Gas Ignition Control Block Signal
Normal
Operation
6 Minutes Delay
Pre
-
Ventilation 30 seconds
Fire
-
up Electrode 4s
Gas Valv e Open
Ionisation 1second after
the end of sparking?
Gas Valv e
remains
Open
Gas Contr
ol
Valv e Closes
BURNER STOPS
Fault o n Gas
Control Block
Signal from Ionisation
probe still ON
?
Air Press Switch ON
or Backfire Thermostat?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES

Lennox FLEXY II Series Specifications

General

Brand	Lennox
Model	FLEXY II Series
Category	Air Conditioner
Language	English