Riello 3789310, Installation, Use And Maintenance Instructions

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8
GAS LINE
• The gas train must be connected to the gas
attachment 1)(A), using flange 2), gasket 3)
and screws 4) supplied with the burner.
• The gas train can enter the burner from the
right or left side, depending on which is the
most convenient, see fig. (A).
• Gas solenoids must be as close as possible to
the burner to ensure gas reaches the combus-
tion head within the safety time range of 3s.
• Make sure that the pressure governor calibra-
tion range (colour of the spring) comprises the
pressure required by the burner.
GAS TRAIN (B)
It is type-approved according to EN 676 Stan-
dards and is supplied separately from the burner
with the code indicated in table (C).
KEY (B)
1 - Gas input pipe
2 - Manual valve
3 - Vibration damping joint
4 - Pressure gauge with pushbutton cock
5 - Multibloc, including:
- filter (replaceable)
- working valve
- pressure adjuster
6 - Minimum gas pressure switch
7 - Valve seal checking device.
In accordance with the standard EN 676,
gas valve leak detection control devices
are compulsory for burners with maximum
outputs of more than 1200 kW.
8 - Gasket
9 - Gas adjustment butterfly valve
10 - Max gas pressure switch (accessory)
11 - Gas train/burner adaptor
P1 - Pressure at combustion head
P2 - Up-line pressure of valves/adjuster
L - Gas train supplied separately with the code
indicated in table (C)
L1 - The responsibility of the installer
KEY TO TABLE (C)
C.T.= Gas valves leak detection control
devices:
- = Gas train without gas valve leak
detection control device; device that
can be ordered separately and
assembled subsequently (see Col-
umn 7).

= Gas train with assembled VPS valve
leak detection control device.
7 = VPS valve leak detection control device.
Supplied separately from gas train on
request.
11 = Gas train/burner adaptor.
Supplied separately from gas train on
request.
Note
See the accompanying instructions for the
adjustment of the gas train.
(B)
(C)
(A)
D505
D3791
L1 L
P2
P1
1 2
3
4
5
6
7
8
9
10
11
BURNERS AND RELEVANT GAS TRAINS APPROVED ACCORDING TO EN 676
GAS TRAINS L 7 11
Code Model Ø C.T. Code Code
3970144 MB-DLE 412 1”1/4” - 3010123 3000843
3970197 MB-DLE 412 CT 1”1/4”

3010123 3000843
3970180 MB-DLE 415 1”1/2 - 3010123 3000843
3970198 MB-DLE 415 CT 1”1/2

3010123 3000843
3970181 MB-DLE 420 2” - 3010123 -
3970182 MB-DLE 420 CT 2”

- -
3970221 MBC-1200-SE-50 2” - 3010123 -
3970225 MBC-1200-SE-50 CT 2”

- -