Toyotomi Laser 300 Service Manual page 24

L A S E R L A S E R
Section 4
Control Circuit Board
4-2
Time Chart
No Item
1
17 Set OK timing
18 Fuel recovery timing
Burner thermistor
19
low temperature timing (T25)
Burner thermistor timing
20
False flame detection timing
21
Low voltage timing
22
2 Flame detector
1 Detection current
Allowable leakage
2
resistance
3 Room thermistor
Maximum set temperature
1
Minimum set temperature
2
Differential 1
3
Maximum temperature
setting
Minimum temperature setting
Differential 2
4
Maximum temperature
setting
Minimum temperature setting
22
S E R V I C E M A N U A L
H E A T I N G H E A T I N G
Specification
(T22) 10 ± 2 sec. Set room temperature
(T23) Within 3 sec.
3±2 sec.
300 ± 30 sec.
(T26)
30 ± 2 sec.
(T44)
10 ± 2 sec.
(T46)
Measurement meter:
range of 3 A)
More than 0.6 A
When no flame is detected during miss ignition timing
(recommended value
(T12), display E- 2.
is 0.3 A)
When miss ignition is detected 3 times in succession,
display E- 22.
When no flame is detected during combustion, shift
to extinguishing process and stop operation.
Only when the detection current exceeds 0.6 A
More than 1.5 M
Thermistor used is B constant 4100; resistance at 25
deg. C is 10 K.
Shall display 90 deg. F
32.7 ± 2.3℃
+0.74
7.08 K
0.68
Shall display 50 deg. F
10.4 ± 2.0℃
+2.18
20.34 K
1.92
1.0 ± 0.5deg Normal combustion
Set temperature: 90 deg. F
+0.11
0.24 K
0.12
Set temperature: 50 deg. F
+0.32
1.01 K
0.33
2.0 ± 0.7deg Flame extinguishing
Set temperature: 90 deg. F
+0.22
0.58 K
0.33
Set temperature: 50 deg. F
+1.19
3.28 K
1.25
S Y S T E M S S Y S T E M S
Trouble Shooting
Conditions Remarks
Yokogawa 2011-SB2 (class 1,
S5566N 4.7M