HEATINGSEQUENCECONTINUED
| NORMAL | HEATING MODE |
|
|
| ABNORMAL | HEATING | MODE | ||||||||
|
| J |
| 15PREPURGESECONDS | J_ |
|
|
|
|
|
|
|
|
|
| |
|
|
|
| l |
|
|
|
|
| GAS VALVE OFF. COMBUSTION AIR | ||||||
|
|
|
|
|
|
|
|
| j (s,GW'N_%_,%_0,0/_',_",G | |||||||
|
|
|
|
|
|
|
|
|
| AND INDOOR BLOWER OFF. | J- | |||||
| IGNITION | SEQUENCE BEGINS |
|
|
| ALTERNL%t"%F SRES/ | ||||||||||
|
| (Ignition | tfiatcounter initiated.) |
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
| WATCHGUARD |
| - FLAME | FAILURE. | |||
|
|
| IGNITOR(20 |
|
|
| i |
| COMBUSTION |
| AIR INDUCER | OFF. | ||||
|
|
|
|
|
|
|
|
|
|
|
| INDOOR |
| BLOWER | OFF, |
|
|
|
| "_- | _. |
|
| LED | #1 | & LED #2 | ALTERNATE | FLASH, | |||||
| I |
|
|
|
|
|
|
|
|
|
|
| ||||
| WETIMEDMODE | I I |
| _TAS |
| J |
|
| VALVE OFF. |
|
| |||||
CALLFOR Ist STAGEHEAT j | L | SINGLE STAGET'STAT j | L |
|
| YES |
|
|
| |||||||
|
|
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
| HIGH HEAT ONLY | j |
|
|
|
|
|
|
| |
MAIN GAS VALVE OPEN |
| MAIN | GAS VALVE OPEN |
|
|
|
|
| CONTROL | CHECKS | RETRY |
|
| |||
|
|
| GAS VALVE OPEN |
| FOR | IGNmON | COUNT |
|
| |||||||
LOW HEATONLY |
| LOW HEATONLY |
|
| HIGH AND LOW HEAT |
|
|
|
|
|
|
|
| |||
(Ignitorremains energized,) |
| (IgNitor | remains energized, |
|
| (ignitor remains energized,) |
| HAVE FOUR |
|
| ||||||
|
|
| SECONDSTAGE |
|
|
|
|
| BEEN COMPLETED? |
|
| |||||
|
|
| TIME ONBEGINS |
|
|
| / |
| / |
|
|
|
| |||
I |
|
| 4 SECONDS_ |
|
|
|
|
|
|
|
|
| ||||
FLAME RECTIFICATION CURRENT CHECK | J |
|
|
|
|
| ||||||||||
|
| I > | 0.15 microamps) |
|
|
| I |
|
|
|
|
| ||||
I | (ResponseE |
| J |
|
| |||||||||||
|
|
| time |
|
|
|
|
|
|
|
|
| ||||
I | INDOOR BLOWER ON DELAY BEGINS | I |
|
|
|
|
|
|
|
| ||||||
3__ |
| (45 seconds.) |
|
|
| I |
|
|
|
|
|
|
|
| ||
........ |
| .__ | _ |
| _. |
|
|
|
|
|
|
|
|
| ||
| W'2TIMEDMOOE | I | I |
| I |
|
|
|
|
|
| |||||
CALLFOR Ist STAGEHEAT J L |
|
|
|
|
|
|
|
|
| |||||||
|
|
| SINGLESTAGET'STAT | JL | HIGH HEATONLY j |
|
|
|
|
|
|
|
| |||
|
|
|
|
|
| .... |
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
INDOOR BLOWER ON LOW SPEED, | INDOOR BLOWER ON HIGH HEATING I |
|
|
|
|
|
| |||||||||
ACC. TERM NAL ENERG ZES | SPEED, ACC, TERM NAL ENERGIZES. I |
|
|
|
|
|
| |||||||||
|
|
|
|
|
|
|
|
|
| I |
|
|
|
|
|
|
I | FLAME PRESENT? | I |
!Continuous flame check) | I | |
1 | FLAME SIGNAL | _ |
( > 0.7 microamps) | ||
I | PRIMARY LIMIT SWITCH CLOSED? |
|
|
| |
I | ROLLOUT SWITCH CLOSED? |
|
I | PRESSURE SWITCH CLOSED? |
|
ICONTtNUED ON NEXT PAGE) |
| |
|
| I |
CONTINUED ON NEXT PAGE
NO
LEDLOWFLAMEB,GNAL#1 - SLOW FLASH
LED #2 - FAST FLASH
COMBUSTION AIR INDUCER
INDOOR BLOWER ON.
GAS VALVE
LED #1 - SLOW FLASH; LED #2 - ON.
t
J | HAS THREELIMITCLOSEDMINUTES?WITHIN |
|
COMBUSTION AIR INDUCER DE*ENERGIZED. |
| |
INDOOR BLOWER OFF DELAY (Selected time) |
| |
| GAS VALVELED | I |
LED #2 - SLOW FLASH
Page 29
