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COMMISSIONING
A
Measuring nipple for inlet pressure
B
Measuring nipple for outlet pressure
C
Choke screw for max. output (Inbus 4mm)
D
Offset-screw min. output (Torx T40)
5.3.5 Setting the gas flow rate
Important basic information:
If the minimum connection pressure (section 5.3.3) is too
low (e.g. because of clogged gas filter, under-dimensi-
oned gas supply), the boiler will not achieve the rated
output indicated by the manufacturer. In this case, please
contact the gas supply company.
NOTICE
If the connection pressure of natural gas is
below 15 or above 25 mbar, no setting and
no commissioning can take place.
At the Honeywell multiple setting device (5.3.4) are two
nipples for measuring the gas inlet A and the gas outlet
pressure B.
Used for the mixing is an ultramodern, complete unit
comprising a mixing unit (venturi), multiple setting device
and fan.
To set, proceed as follows:
a) Check the setting of the minimum and maximum
speed at the automatic firing unit according to the pa-
rameter list.
b) Connect the boiler at the gas side and electrically. To
get into the service mode, press the „MODE“ and „+“
keys!
- Indication on the display during service mode:
the current level shows „SEr“ on the display
after entering into this mode an efficiency of 50 % is
achieved.
The efficiency can be changed between 0 and 100 %
with the „+“ and „-“ keys.
exit of this mode:
Press the Reset-key or automatically after 20 minutes.
Adjust the boiler to 100 % with the „+“ key. Check the
CO
2
(O2)-content of the flue gas. It has to be between
CO
2
= 8,5 - 8,8 (O2 = 5,9 - 5,5) Vol.-% (dry). Correct
this value, if necessary by turning the chocke bolt C
of the Venturi (5.3.4). Next check the gas flow rate
at the gas meter. (volumetric meter). To calculate the
setting gas flow rate the operation calorific value HuB
is needed. Ask your gas utility for it. The setting value
is calculated as followed:
Setting value E =
Heat load NB (kW)
Net heating value HuB (kW/m
3
)
=
NB
×
1000
l
HuB
60
min
The gas flow rate is corrected by changing the fan speed:
- Decrease the max. fan speed at the automatic firing
unit: -> gas flow increases (with constant CO
2
(O2)
value)
- reduction of the max. fan speed in the automatic fi-
ring unit: -> gas flow increases (with constan CO
2
(O2)
value)
c) Press the „-“ key to set the boiler to 0%.
Check the CO
2
(O2)-content of the flue gas. It must
be between CO
2
= 8,5 - 8,8 (O2 = 5,9 - 5,5) Vol.-%
(dry). Correct the CO
2
(O2) value where necessary by
turning the offset screw D at the venturi (first remove
the protective cap).
CO
2
(O
2
) - setting
fig. 12
After a correction it is necessary to achieve the upper and
lower value again for a control/correction.
The boiler is now correctly set. To revert to normal opera-
tion, press the „RESET“-key.
Summary of Contents for TopGas 80
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