Variable Heat Output; Combustion Parameters - Immergas VICTRIX EXA 28 1 ERP Instruction And Recommendation Booklet

3.18 VARIABLE HEAT OUTPUT.

N.B.: the pressures indicated in the table repre-
sent the differences of pressures at the ends of
the Venturi mixer and can be measured from the
pressure points in the upper part of the sealed
Victrix EXA 28 1 ErP
THERMAL
POWER
(kW) (kcal/h)
MAX. D.H.W. 27.7 23822
MAX. CEN.
23.7 20382
HEAT.
OUTPUT 5.5 4730
Victrix EXA 32 1 ErP
THERMAL
POWER
(kW) (kcal/h)
MAX. D.H.W. 32.0 27520
MAX. CEN.
28.0 24080
HEAT.
OUTPUT 7.2 6192

3.19 COMBUSTION PARAMETERS.

Supply pressure
Victrix EXA 28 1 ErP
Gas nozzle diameter (Gas valve 848)
Venturi diameter
No. x Ø venturi holes
Flue flow rate at nominal heat output
Flue flow rate at min heat output
CO at Q. Nom./Min.
2
CO with 0% O at Nom./Min. Q. Nom./Min.
2
NO at 0% of O at Q. Nom./Min.
X 2
Flue temperature at nominal output
Flue temperature at minimum output
Victrix EXA 32 1 ErP
Gas nozzle diameter (Gas valve 848)
Venturi diameter
No. x Ø venturi holes
Flue flow rate at nominal heat output
Flue flow rate at min heat output
CO at Q. Nom./Min.
2
CO with 0% O at Nom./Min. Q. Nom./Min.
2
NO at 0% of O at Q. Nom./Min.
X 2
Flue temperature at nominal output
Flue temperature at minimum output
Combustion parameters: measuring conditions
of useful efficiency (flow temperature/return
temperature= 80/60 °C), ambient temperature
reference = 15°C.
chamber (see pressure test 17 and 18 Fig. 1-31).
The adjustments must be made with a digital
differential pressure gauge with scale in tenths
of a mm or Pascal. The power data in the table
has been obtained with an intake-exhaust pipe
METHANE (G20)
BURNER GAS PRESS. BURNER BURNER GAS
FLOW RATE NOZZLES FLOW RATE
(m 3 /h) (mbar) (mm H O)
2
3.00 3.20 32.6
2.56 2.41 24.5
0.60 0.17 1.7
METHANE (G20)
BURNER GAS PRESS. BURNER BURNER GAS
FLOW RATE NOZZLES FLOW RATE
(m 3 /h) (mbar) (mm H O)
2
3.44 1.95 19.9
3.00 1.50 15.3
0.79 0.15 1.5
BUTANE (G30)
PRESS. BURNER BURNER GAS
NOZZLES FLOW RATE
(kg/h) (mbar) (mm H O) (kg/h)
2
2.24 3.40 34.7 2.20
1.91 2.57 26.2 1.88
0.45 0.18 1.8 0.44
BUTANE (G30)
PRESS. BURNER BURNER GAS
NOZZLES FLOW RATE
(kg/h) (mbar) (mm H O) (kg/h)
2
2.57 2.30 23.5 2.52
2.24 1.79 18.3 2.21
0.59 0.18 1.8 0.58
G20
mbar (mm H O) 20 (204)
2
mm 7.00
mm 22,00
mm 4 x 4,00
kg/h 45
kg/h 10
9.40 / 8.60
%
ppm 190 / 5
mg/kWh 40 / 25
°C 53
°C 46
mm WITHOUT
mm 24,00
mm 4 x 4,00
kg/h 51
kg/h 13
9.60 / 8.70
%
ppm 165 / 3
mg/kWh 71 / 17
°C 62
°C 56
33
measuring 0.5 m in length. Gas flow rates refer
to the lower calorific value at a temperature of
15°C and at a pressure of 1013 mbar. The burner
pressure values refer to the use of gas at a tem-
perature of 15°C.
PROPANE (G31)
PRESS. BURNER
NOZZLES
(mbar) (mm H O)
2
4.00 40.8
2.99 30.5
0.21 2.1
PROPANE (G31)
PRESS. BURNER
NOZZLES
(mbar) (mm H O)
2
2.75 28.0
2.13 21.7
0.20 2.0
G30
29 (296)
4.80
22,00
4 x 4,00
41
9
12.00 / 11.40 10.80 / 10.40
580 / 14
94 / 55
60
46
5.70
24,00
4 x 4,00
46
12
12.30 / 11.10 10.50 / 9.70
470 / 5
270 / 35
62
57
G31
37 (377)
5.00
22,00
4 x 4,00
45
9
250 / 9
35 / 20
59
44
5.70
24,00
4 x 4,00
52
13
140 / 3
90 / 22
61
55