baltur COMIST 72 DSPGM Manual De Mantenimiento, Uso E Instalación página 28

INSTRUCTIONS FOR HONEYWELL GAS VALVES
E
UNIVERSAL GAS VALVES TYPE: VE 4000B1
N (....B.... = Opening - Closure, rapid. Flow regulator)
G
fig.1
L
I
S
H
FEATURES
- Valve normally closed
- With flow regulator
- Rapid opening and closing
The VE4000B1 valves are Class A solenoid valves, normally
closed. They may be used as ON/OFF valves in the supply
trains with Natural Gas, Manufactured Gas or GPL, on burners
or combustion plants.
They are provided with M.I. and CE Approval for EN 161.
ADJUSTMENT
For models VE 4000B1 (see fig. 1)
Adjustment to the flow
- Remove the cover from the upper section of the coil.
- Insert a hexagonal Allen key into the central section at the top.
- Turn clockwise to decrease the flow or anti-clockwise to increase
it.
- Replace the cover and tighten it.
ATTENTION
- The adjustment must only be carried out by qualified personnel.
- Per la chiusura della valvola è necessario che la tensione ai ter-
minali della bobina sia 0 volt.
- The flow regulator of the VE 4100 valve series is situated in the
lower section.
CONTROL BOX FOR LFL 1... SERIES 02 GAS
BURNERS
Control box for burners of average and high power, with forced
draught, intermittent service (*), 1 or 2 stages, or modulating
types, with supervision of the air pressure for controlling the
air damper.
This control box bears the EC mark, in accordance with the
Gas and Electromagnetic Compatibility Directive.
* For reasons of safety, it is necessary to make at least one con-
trolled stop every 24 hours!
As regards the standards
The following LFL1... features exceed the standards, offering
a high level of additional safety:
- The flame detector test and false flame test start immediately
after the tolerated post-combustion time. If the valves remain open,
or do not close completely after adjustment stops, a lock-out stop
is triggered at the end of the tolerated post-combustion period. The
tests will end only at the end of the pre-ventilation time of the next
start-up.
- The validity of working of the flame control circuit is checked each
time the burner starts up.
- The fuel valve control contacts are checked for wear during the
post-ventilation time.
- A built-in fuse in the appliance protects the control contacts from
any overloads that may occur.
As regards the burner control
- The equipment allows operation with or without post-ventila-
tion.
- Controlled activation of the air damper to ensure pre-ventilation
with nominal airflows. Positions checked: CLOSED or MIN (position
of ignition flame on start-up); OPEN at the beginning and MIN at the
end of the pre-ventilation time. If the servomotor does not position the
air damper at the points described, the burner does not start-up.
- Ionization current minimum value = 6mA
- UV cell current minimum value = 70mA
- Phase and neutral must not be inverted.
- Any place may be used for installation and assembly (IP40
protection).
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