Riello Burners C9517300, Инструкции по установке, использованию и обслуживанию

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16
FLAME SIGNAL MEASUREMENT (A)
Min value for a good signal: 8 µA.
If the value is lower, it can be due to:
• Worn photocell;
• Low current;
• Bad set up of the burner.
In order to measure the current, use a microammeter of
100
µ
A c.c., connected to the scanner, as in the dia-
gram.
SEQUENCE OF OPERATION - LAL CONTROL
See fig. (B) - (C).
Switching times are given in seconds, in the burner star-
tup sequence.
Legend for the times
t1
Pre-purge time with air damper open
t2 Safety time
t3 Pre-ignition time, short (“Z” connected to
terminal “16”)
t4 Interval between voltage at terminals “18” and
“20”
t5 Air damper running time to OPEN position
t6 Air damper running time to low-flame position
(MIN)
t7 Permissible after-burn time
t8 Interval to the OPEN command for the air damper
Min. detector current required at AC 230 V 8
µ
A
Max. detector current required without
flame
0.8
µ
A
Max. detector current that can occur 35
µ
A
Instrument’s + pole to term. 22
Length of detector line
In the same cable as the control lines not perm.
Separate cable in the cable duct 20 m
Three-wire cable ---
Two-wire cable for the detector line (bl,
sw); separate single-wire cable for the line
(br)
---
Shielded cable (e.g. RG62, shielding insu-
lated)
200 m
Shielding to term. 23
LAL 2.25
t1
t2
t3
t4 18
4
2
12
t5
t6
t7
t8 optional
optional
12
4
(B)
(C)
Full modulation
High - low
D2871
D2883
(A)
D3206
LAL2... Sub-base