N.B.: the pressures given in the table indicate the dierences
in pressure at the ends of the mixer Venturi and measurable
at the pressure points at the top of the sealed chamber (see
pressure test 28 and 29 page 16-17) Adjustments must be
made with a digital dierential pressure gauge having a scale
in tenths of mm or Pascal. e power data given in the table
is obtained with intake/exhaust pipe of length 0.5 m. Gas
owrates refer to heating power below 15°C and at a pressure
of 1013 mbar. Burner pressures refer to use of gas at 15°C.
3.21 Variable heat output - Victrix 27.
3.20 Variable heat output - Victrix 20.
METHANE (G20) BUTANE (G30) PROPANE (G31)
HEAT
OUTPUT
HEAT
OUTPUT
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
(kW) (kcal/h) (m
3
/h) (mbar) (mm H
2
O) (kg/h) (mbar) (mm H
2
O) (kg/h) (mbar) (mm H
2
O)
23.5 20210 2.54 5.77 58.9 1.89 5.29 54.0 - - -
22.0 18920 2.38 5.09 51.9 1.77 4.59 46.8 - - -
20.0 17200 2.16 4.25 43.3 1.61 3.74 38.2 1.59 5.30 54.1
18.0 15480 1.95 3.50 35.7 1.45 3.00 30.6 1.43 4.30 43.9
16.0 13760 1.74 2.82 28.8 1.29 2.34 23.9 1.28 3.40 34.7
14.0 12040 1.53 2.22 22.7 1.14 1.78 18.1 1.12 2.60 26.5
12.0 10320 1.32 1.69 17.3 0.98 1.30 13.3 0.97 1.90 19.4
10.0 8600 1.11 1.23 12.6 0.82 0.91 9.3 0.81 1.40 14.3
8.0 6880 0.89 0.84 8.6 0.67 0.60 6.1 0.66 0.90 9.2
6.0 5160 0.68 0.52 5.3 0.50 0.38 3.9 0.50 0.60 6.1
4.7 4000 0.53 0.34 3.5 0.39 0.28 2.9 0.39 0.40 4.1
METHANE (G20) BUTANE (G30) PROPANE (G31)
HEAT
OUTPUT
HEAT
OUTPUT
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
GAS FLOW-
RATE
BURNER
NOZZLE PRESSURE
BURNER
(kW) (kcal/h) (m
3
/h) (mbar) (mm H
2
O) (kg/h) (mbar) (mm H
2
O) (kg/h) (mbar) (mm H
2
O)
32.0 27520 3.45 5.05 51.5 2.57 4.81 49.1 2.53 6.61 67.4
31.0 26660 3.34 4.74 48.4 2.49 4.50 45.9 2.45 6.18 63.1
29.0 24940 3.12 4.15 42.4 2.33 3.91 39.9 2.29 5.38 54.9
27.0 23220 2.91 3.61 36.8 2.17 3.37 34.3 2.13 4.63 47.3
25.0 21500 2.69 3.10 31.6 2.01 2.86 29.2 1.98 3.94 40.2
23.0 19780 2.48 2.63 26.8 1.85 2.41 24.5 1.82 3.32 33.8
21.0 18060 2.26 2.20 22.5 1.69 1.99 20.3 1.66 2.75 28.0
19.2 12165 2.06 1.84 18.8 1.54 1.65 16.9 1.52 2.28 23.2
17.0 14620 1.84 1.47 15.0 1.37 1.31 13.3 1.35 1.79 18.3
15.0 12900 1.62 1.16 11.8 1.21 1.03 10.5 1.19 1.40 14.3
13.0 11180 1.41 0.89 9.1 1.05 0.79 8.1 1.03 1.07 10.9
11.0 9460 1.20 0.66 6.8 0.89 0.60 6.1 0.88 0.80 8.1
9.0 7740 0.98 0.47 4.8 0.73 0.45 4.6 0.72 0.58 5.9
6.3 5418 0.69 0.27 2.8 0.52 0.32 3.3 0.51 0.38 3.8
32
INSTALLERUSERTECHNICIAN