Automatic Heating Enterprise LG 120, Инструкция по установке, эксплуатации и обслуживанию

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APPENDIX: COMPONENTS SPECIFICATIONS 37
LANDIS LMG21/22/25 FLAME CONTROLLER
FEATURES
The series of equipment LMG.. is interchangeable with the series
LGB.., all diagrams and accessories are interchangeable, the main
features are:
z
Indications of error codes by a signalling red light in the release
button;
z
Programmer times fix for the digital management of signals.
In case of lack of the flame during working the model LMG 25.33
doesn’t stop but repeat the starting cycle
maximum 3 times), if the problem persists, after the fourth starting
the equipment stops .
Comparative table
Conditions for startup
z
Burner control is reset
z
All contacts in the line are closed
z
Fan motor “M” or AGK25 is connected
z
Air pressure monitor “LP” is in idle position
z No undervoltage
Undervoltage
z
Safety shutdown in the event the mains voltage is lower than typi-
cally AC 160V;
z
a restart is made when the mains voltage exceeds AC 195V
Reversed polarity protection
If the connections of line (terminal 12) and neutral (terminal 2) have
been exchanged, the burner control will initiatelockout at the end of
"TSA"
Startup program
A Start-up, controlled by LR
Fan command after the waiting time tw for LMG21/25, or after the
period t11 for LMG22.
tw Waiting time.
During this time the air pressure switch and the flame relay are tested
for correct contact position.
t11 Programmed time for the opening of the servocontrol SA,
only with LMG22. The servocontrol SA moves to the low flame posi-
tion.
t10 Specified time for the air pressure signal.
When this time has elapsed, the set value of air pressure must have
built up, else a lock-out is initiated.
t1 Pre-purgue time.
Purguing of the combustion chamber and the secondary heating sur-
faces with low-load combustion head for LMG21/25, or with fully load
combustion air for LMG22. The affective pre-purgue time comprises
the interval between the end of tw and the start of t3.
t12 Programmed time to close the damper SA (MINIMUM)
(LMG22): During the time t12, the air damper moves to the low flame
position.
t3n Postignition time
Ignition time during «TSA». Just before reaching the end of «TSA»,
ignition transformer «Z» will be switched off. This means that «t3n» is
somewhat shorter than «TSA». This is necessary in order to give the
forcedly closed flame relay «FR» sufficient time to drop out if there is
no flame.
t3 Pre-ignition time.
Ignition time until the opening of BV1.
TSA Ignition safety time.
Opening of fuel valve BV1; the flame signal must be present at the
terminal 1 up tho the end of TSA.
t4 Interval BV-BV2 or BV1-LR.
Interval between the end of TSA and the consent to the second fuel
valve BV2 or to the load regulator LR.
B-B’ Interval for the flame establishment.
C Operating position of the burner.
C-D Burner operation (heat production)
D Controlled shut-down by LR.
The burner is shut-off immediately and the flame control device is
ready for a new start.
Old series LGB New series LMG
--- LMG 25.33
LGB 21.33 LMG 21.33
LGB 22.33 LMG 22.33