40
INSTALLERUSERMAINTENANCE TECHNICIAN
3.20 VARIABLE HEAT OUTPUT.
N.B.: the power data in the table has been ob-
tained with intake-exhaust pipe measuring 0.5 m
in length. Gas ow rates refer to net heating value
below a temperature of 15°C and at a pressure
of 1013 mbar.
METHANE (G20) PROPANE (G31)
HEAT
POWER
HEAT
POWER
MODULA-
TION
GAS FLOW RATE BURNER
MODULA-
TION
GAS FLOW RATE BURNER
(kW) (kcal/h) (%) (m
3
/h) (%) (kg/h)
28.3 24295
D.H.W.
99 3.06 100 2.25
27.5 23650 97 2.98 97 2.19
26.5 22790 94 2.87 92 2.11
25.5 21930 90 2.76 88 2.03
24.1 20717
CEN. HEAT.
+
D.H.W.
85 2.61 82 1.91
23.5 20210 83 2.54 80 1.87
22.7 19542 80 2.46 76 1.81
21.5 18490 76 2.33 71 1.71
20.5 17630 72 2.22 67 1.63
19.5 16770 68 2.11 63 1.55
18.5 15910 65 2.01 59 1.47
17.5 15050 61 1.90 55 1.39
16.5 14190 57 1.79 51 1.31
15.5 13330 53 1.68 47 1.24
14.5 12470 48 1.58 42 1.16
13.5 11610 44 1.47 38 1.08
12.5 10750 40 1.36 34 1.00
11.5 9890 35 1.26 30 0.92
10.5 9030 31 1.15 26 0.84
9.5 8170 26 1.04 22 0.76
8.5 7310 22 0.93 18 0.68
7.5 6450 17 0.82 14 0.61
6.5 5590 12 0.72 10 0.53
5.5 4730 7 0.61 6 0.45
4.5 3870 2 0.50 2 0.37
4.3 3689 1 0.48 1 0.35
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