- 39
-
ENGLISH
CHECKING COMBUSTION
In order to obtain optimum combustion efficiency and to safeguard the environment, we recommend to check, and regulate
combustion using the appropriate instruments.
The most important levels to be checked are:
CO
2
.
The level of CO
2
indicates the excess of air during combustion. If the quantity of air is increased, then the CO
2
%
level decreases, while a decrease in combustion air leads to an increase in CO
2
. Acceptable values would be: 8.5-10%
METHANE, 11-12% B/P.
CO.
This indicates the presence of unburnt gas. CO, as well as lowering the combustion efficiency, is also a danger, being
a poisonous gas. The presence of CO is thus an indication of imperfect combustion, and is usually a sign that there is a
lack of air during combustion. Maximum acceptable value is CO = 0.1% volume.
Flue gas temperature.
This represents the loss of heat through the chimney. The higher is the temperature, the greater is
the loss of heat and the lower is the combustion efficiency. If the temperature is too high, then it is necessary to decrease
the amount of gas burnt. Acceptable temperature levels range between 160°C and 220°C.
NOTE: Certain countries may have different regulations, and thus different admissible levels from those given
above.
START UP
Check the position of the ignition electrode tips and the position of the control electrode. Check the correct operation of the
gas and air pressure switches. When the thermostatic line and the gas pressure switch close the control box gives consent
for the motor to be started. During this period the control box conducts a self-test of its correct working order. If the test is
positive then the cycle continues and at the end of the pre-purge period (TPR - combustion chamber purge) the consent
is given to the transformer for the spark at the electrodes, and to the solenoid valve for opening.
Within the safety time (TS) flame stabilization should occur, otherwise the system goes in lock-out mode.
PROLONGED SWITCHING OFF
If the burner should remain inactive at length close the gas cock and remove the electrical current from the appliance.
OPERATION WITH DIFFERENT TYPES OF GAS
CONVERSION FROM NATURAL GAS TO B/P
A specific burner is not previewed. Should you wish to adapt a natural gas burner for combustion of other gases observe
the following instructions.
EM 16-E
Loosen the screws
D
, remove the diffuser ring
E
and replace it with another ring of type
F
, which differs from type
E
in
that there are less gas outflow holes.
D
E
F
Summary of Contents for EM 26-E
Page 2: ......
Page 23: ...23 ITALIANO...
Page 43: ...43 ENGLISH...
Page 63: ...63 FRAN AIS...
Page 83: ...83 DEUTSCH...
Page 103: ...103 ESPA OL...
Page 105: ...105 a b c d CO2 CO2 CO2...
Page 106: ...106 109 120...
Page 110: ...110 2 n 4 3 4 5 1 A B C D...
Page 111: ...111 2 EM 16 E EM 26 E...
Page 112: ...112 EM 16 E S3 B4 230V 50Hz EC F FA IG MB MPE PA PGm TC TR TS VP VS 2 3 mm 20 mm...
Page 113: ...113 EM 26 E S3 B4 230V 50Hz EC F FA IG Ima LI MB MPE PA PGm TC TR TS VP VS 2 3 mm 20 mm...
Page 115: ...115 3 sec 3 sec LME 10...
Page 116: ...116 EM 16 E A EM 26 E B 1 2 3 B C D C MAX...
Page 119: ...119 B CO2 CO2 CO2 8 5 10 11 12 B P CO CO CO 0 1 160 C 220 C TPR TS B P EM 16 E G H I D E F...
Page 120: ...120 EM 26 E G H I B P H G H I mbar mbar Pi Pt...
Page 121: ...121 CO2 CO EM 16 E 1 1 2 1 3 4 2 5 3 EM 26 E 4 1 2 4 3 4 4 5 5 5A 6 7 6 1 2 3 4 5 5A 6...
Page 122: ...122 1 A B A B 2 A B C A B C 3 A A...
Page 123: ......