Air Pressure Switch; Gas Valve - Sime Planet Dewy 30 BF Manuel D'utilisation

Single modules are calibrated in heating position.
"∆p air" ADJUSTMENT
To measure "∆p air" simply con-
nect the differential pressure
gauge, equipped with a decimal
scale in mm H O or "W.C., to the
2
positive and negative sockets on
the air pressure switch (Drawing
1) .
Operating sequence:
1) Rotate the module heating
power adjustment trimmer
clockwise to the limit (B -
Drawing 2) ; fan on maximum.
2) Find the "max ∆p air" values in
the table, using the fan board
"MAX" trimmer (Drawing 3) :
Max. ∆p air (mm H
O)
2
Single module 30 kW
Natural gas 92.0 ±2
L.P. gas 91.0 ±2
Max. ∆p air ("W.C.)
Single module 30 kW
Natural gas 3.62 ±0.08
L.P. gas 3.58 ±0.08
3) Rotate the module heating
power adjustment trimmer
counter-clockwise to the limit
(B - Drawing 2) ; fan on mini-
mum.
4) Find the "min ∆p air" values in
the table, using the fan board
"MIN" trimmer (Drawing 3) :
Min. ∆p air (mm H
O)
2
Single module 30 kW
Natural gas 8.0 ±0.2
L.P. gas 8.0 ±0.2
Max. ∆p air ("W.C.)
Single module 30 kW
Natural gas 0.315 ±0.008
L.P. gas 0.315 ±0.008
"∆p air-gas" ADJUSTMENT
To measure "∆p air-gas" simply

Air pressure switch

Pressostato aria
connect the positive socket on
the differential pressure gauge to
the downstream pressure fixture
and the negative socket to the air
pressure switch (Drawing 4) .
Gas pressure is always adjusted
with the fan on minimum.
Drawing 1
Operating sequence:
Drawing 2
B
1) Rotate the module heating
power adjustment trimmer
counter-clockwise to the limit
(B - Drawing 5) ; fan on mini-
mum.
2) Completely unscrew the valve
gas shutter (1- Drawing 6) .
3) Use the gas valve OFF-SET adjustment screw (2 - Drawing 6) and
find the "∆p aria-gas" value in the table:
Shutter open (30 kW)
"∆p air"
Single module
min/max
Natural gas
adjustment
L.P. gas
4) Use the shutter (1- Drawing 6) and find the "∆p air-gas" value in the
table:
Adjusted shutter (30 kW)
Single module
Drawing 3
Natural gas
L.P. gas
Air pressure switch
Pressostato aria
3 3 0 0 k k W W
60 kW
Drawing 4
Drawing 5
B
1
2
3 3 0 0 k k W W
60 kW
Drawing 6
mm H O "W.C.
2
4.2 ±0. 1 0. 1 65 ±0.004
6.3 ±0. 1 0.248 ±0.004
mm H O "W.C.
2
3.0 ±0. 1 0. 1 18 ±0.004
4.7 ±0. 1 0. 1 85 ±0.004
ENG
FR
35