pag.9
LB 447
Blu 500 ÷ 700 P
B
L’apparecchiatura controllo fiamma fa partire il ventilatore del bruciatore per effettuare il prelavaggio della camera di combustione,
controllando la pressione dell’aria di ventilazione tramite il pressostato aria. Al termine della preventilazione entra in funzione il tra-
sformatore di accensione generando una scintilla tra gli elettrodi e contemporaneamente si aprono le valvole del gas (valvole gas di
sicurezza VS e 1° stadio valvola lavoro VL). La sicurezza totale in caso di mancata accensione o di spegnimento accidentale viene
affidata ad una sonda di rivelazione a ionizzazione che interviene mandando in blocco l’apparecchiatura entro il tempo di sicurezza.
Nel caso di mancanza di gas o di un calo notevole di pressione il pressostato gas di minima provvede ad interrompere il funziona-
mento del bruciatore.
t1
t2
t3
t2
t3
t5
t4
t6
t1
t5
t4
Lock out lamp
Flame detection
Gas valve
Enable 2nd stage
Transformer
Air pressure switch
Motor
Gas pressure switch
Normal operative cycle ignition
Rif.
Description
Duration
t1
pressure switch control time-out
9"
t2
time-out for air pressure confirmation
3"
t3
prewashing time
30"
t4
safety time
3"
t5
preignition time
3"
t6
time-out to enable fuel 2nd valve*
8"
LANDIS LGB 21/22 - UP CYCLE
Operative cycle with flameless
SATRONIC DLG976 CONTROL INFORMATION SYSTEM
The SATRONIC DLG 976 control is a micro-processor control which provides information about the current opera-
tion of the burner and the cause of any faults. The information is available by reading the “flash code” at the red LED
within the lockout reset button as detailed below. By the use of additional monitoring equipment a short history of
recorded faults is also available. There are two types of additional monitoring devices available from Satronic Ltd. The
“satropen” is a small pocket reader designed to give a visual read out of status, flame current and supply voltage.
Computer software is available to allow access to the current information and stored data.
FAULT DISPLAY MESSAGES
On burner failure the red LED is permanently illuminated for a period of approximately 10 seconds, followed by a
brief “dark phase”, then one of the following flash codes will indicate the cause of the fault. This indication will repeate
as long as the lockout reset button is not reset.
Message
Flash-Code
waiting for air proving
❘ ❘
.
switch
pre-purge (tv1)
❘ ❘ ❘
.
pre-ignition (tvz)
❘ ❘ ❘ ❘
.
safety time (ts)
❙ ❘
.
delay 2nd stage (tv2)
❙ ❘ ❘
.
running
❘
_
low mains voltage
❘ ❙ ❙
_
Flash-Code Key
short pulse
❘
long pulse
❙
short pause
.
long pause
_
Error diagnosis
Error message
Flash-Code
Possible fault
lockout
❘ ❙ ❙ ❙ ❙
within lock out safety time
safety time
no flame establishment
air proving switch
❙ ❙ ❘ ❘ ❘
air proving switch
in closed position
contact welded
air proving switch
❘ ❘ ❘ ❙ ❙
air proving switch does not
time-out
close within specified time
air proving switch
❘ ❘ ❘ ❘ ❙
air proving switch opens
opened
during start or operation
loss of flame
❙ ❙ ❙ ❙ ❘
loss of flame during operation
Flash-Code for manual lock out
manual/external
❘ ❘ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙
lock out
DLG 976
