Specifications

32
stcudorP retaW htimS .O .A Service Workbook
Ashland City, Tennessee 2005© Training Department
SHUT DOWN SEQUENCE
3-STAGE MODELS
Stage 3 - Set Point
is Reached
Stage 3 – Gas Valv e
De-energized
Set Time Blower Post Purge
( 25 sec onds rec ommended)
Stage 2 -Set Point
Reached
Stage 2 -Gas Valv e
De-energized
Stage 1 - Set Point Reached
Stage 1-Gas Valv e
De-energized
Set Time Blower, Post Purge
( 25 sec onds rec ommended)
All Blower Post Purge Completed
Power Vent Is De-energized
Circulation Pump – Post Purge
( 45 seconds recommended)
Stage 2
Blower (if equipped)
Post Purge
(if equipped)
Stage 3 - Set Point
is Reached
Stage 3 – Gas Valv e
De-energized
Set Time Blower Post Purge
( 25 sec onds rec ommended)
Stage 2 -Set Point
Reached
Stage 2 -Gas Valv e
De-energized
Stage 1 - Set Point Reached
Stage 1-Gas Valv e
De-energized
Set Time Blower, Post Purge
( 25 sec onds rec ommended)
All Blower Post Purge Completed
Power Vent Is De-energized
Circulation Pump – Post Purge
( 45 seconds recommended)
Stage 2
Blower (if equipped)
Post Purge
(if equipped)
Set Time Blower Post Purge
(25 seconds)
Blower Post Purge
(25 seconds)
Blower Post Purge
(25 seconds)