BIO · Edition 09.22
EN-9
BIo..50
1
G
➔
Loosen the screw 2 turns.
2
G
BIoA
1
G
➔
Loosen the screw 2 turns.
2
G
5.12 Burners with gas measuring orifice
1
Read the differential pressure for the required gas
flow rate Q from the enclosed flow rate curve for
cold air.
[mbar (inch WC)]
[m
3
/h (ft
3
/h)]
Δ
p
gas
p
air
p
air
p
gas
Q
air
Q
gas
p
gas
∆
p
air
2 p1
: gas pressure upstream of the measuring orifice,
p2
: gas pressure downstream of the measuring
orifice. Measuring range: select approx. 15 mbar.
3
G
G
➔
Loosen the screws 2 turns.
4
p
2
p
1
5.13 Integrated pilot on the BIo..L
➔
Air pressure test nipple
l
, outside dia. = 9 mm
(0.35").
➔
Gas pressure test nipple
g
, outside dia. = 9 mm
(0.35").
1
g
l
➔
Loosen the screws 2 turns.
2
g
l
➔
Pilot:
p
gas
= 30–50 mbar,
p
air
= 30–50 mbar.
➔
Check flame stability and ionization current.
➔
The gas and air pressure of the integrated pilot
must be higher than the gas and air pressure of
the main burner.
6 CoMMIssIonInG
6.1 Igniting and adjusting the burner
WARnInG
– Ensure adequate ventilation of the furnace
chamber before each burner start!
➔
The burner body will become hot during operation
with preheated combustion air. Provide protection
against accidental contact as required.
1
All valves of the installation must be checked for
tightness before ignition.
6.2 setting the low-fire rate
1
Set the valves to ignition position.
2
Limit the maximum gas volume.
➔
Should an adjustable gas restrictor be installed
upstream of the burner, open the restrictor by ap-
prox. a quarter.
➔
on burners with integrated gas flow adjust-
ment (BIo 65–140):
on delivery, the flow rate
restrictor is 100% open. Close the flow rate rate
restrictor with approx. 10 turns:
3
4
