Fig.6
ON
ON
No Detect
TIMER
INSUFFICIENT
PRE-HEAT
(BURNER THERMISTOR DISCONNECT)
TIME CHART : MODEL SRE 250
Set Temp.
+
2
°
C
1.77 k
Ω
≤
BTH
≤
200 k
Ω
BTH
≥
100 k
Ω
BTH
≥
100 k
Ω
3
3
2
1
L
3
3
3
2
1
4
3
2
F-1
Less than T14
T3
T44
OFF
No Detect
Detect
BTH
≥
100 k
Ω
Fuel Pump
Start
Timer
Pre-set
Timer
4
:
High
3
:
Med - High
2
:
Med
1
:
Med - Low
5
:
Full
4
:
High
3
:
Med - High
2
:
Med
1
:
Med - Low
L
:
Low
Blower Motor
4
:
High
3
:
Med - High
2
:
Med
1
:
Med - Low
Circulation Fan Motor
Operation Switch
Timer Switch
Tip-over Switch
High Limit Switch
Fueling
Primary
Flame Rod
Room
Thermistor
Burner
Thermistor
Operation Lamp
Timer Lamp
Fuel Lamp
Ventilation Lamp
Timer Clock
Lamp
Igniter
Deodorizing
Pump
Blower Motor
Circulation
Fan Motor
Buzzer
Display
Fuel Pump
3
3
1
Note : This time chart will vary according to set condition.
-43-
