Giersch GG20-LN, Техническая информация и инструкции по установке

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17
E
.0
4.
99
•
G
. 0
9.
05
.1
2
20. Modulating or 2-stage sliding gas burner with gas train...
Gas supply measuring point A (p
E
)
nozzle pressure measuring points B (p
G
)
N = Zero point (gas nozzle pressure adjustment for
min. output)
V
= Ratio of nozzle pressure to air pressure in the
burner tube (gas nozzle pressure adjustment at
max. output)
p
W
= Pressure at gas pressure monitor
p
F
= Furnace pressure
p
L
= Baffle plate pressure
Preset:
Locate the appropriate line in adjustment table according to boiler
output and adopt setting values.
• Air flow measurement adjustment, air flap position according to adjustment table.
• The settings "V" and "N" are shown on scales on the outside of the device and can be set from both
sides. In the low load range of the burner, the gas-air mix is set with the aid of a parallel shift of the
characteristic curve (adjusting screw "N"). At full load, adjustment screw "V" is used to change the
ratio to achieve the desired gas nozzle pressures
p
G
(see adjustment table) and exhaust analysis val-
ues (CO
2
, CO).
Burner start:
• Start the burner at low load; if the burner does not go into operation, turn N slightly in the "+"
direction and restart.
Precision setting:
Adjust max. output:
• Measure the gas nozzle pressure at
B
.
• Set burner gradually to high load 2nd stage and correct the exhaust gas analysis at "V".
To do so, set the output controller to max. output (contact from "T6" to "T8" in socket unit X32).
• Move air flap until the max. position is reached (see adjustment table).
• For GG20-Z-L-LN also set 1st/2nd stage switch to 2nd stage.
• Correct exhaust gas values at "V" (see table).
• Set the nozzle pressure by adjusting
the air flap
B
A
p
W
V
N
p
L
p
F
Setting "V" Exhaust gas analysis
values
Change in "+"
direction if:
CO
2
too low
O
2
too high
Change in "-"
direction if:
CO
2
too high
O
2
too low
Adapt nozzle pres-
sure
max. output
Max. output
Increase ST2/max.
output if:
Output/nozzle pressure
too low
Reduce ST2/max.
output if:
Output/nozzle pressure
too high
Start-up