Viadrus GRAND G 36, Manual For Operation And Installation

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4
3. Technical data of boiler
Tab. no.1 Dimensions, operating temperatures a electrical values of boiler
Number of sections pc 3 4 5 6 7
Boiler design B
11BS
Appliance category I
2H
Heat output G 36 BM - natural gas kW 12-17 18-26 27-34 35-41 42-49
Weight kg 100 123 147 175 199
Water space volume l 9,2 11,4 13,6 15,8 18
Diameter of smoke socket mm 110 130 160 170 180
Boiler dimensions - width mm 485 485 570 740 740
- depth x height mm 733 x 935 773 x 935
Water working overpressure kPa
(bar)
400 (4)
Water test overpressure kPa
(bar)
800 (8)
Heating water maximum temperature °C 85
Return water minimum temperature °C 45
Noise level dB max. 65 dB (A)
Chimney draught mbar min. 0,025
Boiler connections - heating water Js 1 1/2“
- return water Js 1 1/2“
- gas Js ½"
Tab. no. 2 Thermal - technical parameters of boiler equipped with SINGLE STAGE GAS VALVE and
designated for NATURAL GAS combustion
(thermal power 34,16 MJ.m
-3
, gas temperature 15 °C and bar. air pressure 1013,25 mbar)
Number of sections pc 3 4 5 6 7
Rated heat output maximum kW 17 26 34 41 49
Rated heat output minimum kW 12 18 27 35 42
Rated heat input maximum kW 18,5 28,5 37 45 53,7
Rated heat input minimum kW 13,3 19,9 29,9 38,8 46,5
Gas volume flow rate at maximum heat output m
3
.h
-1
1,980 2,953 3,920 4,727 5,605
Gas volume flow rate at minimum heat output m
3
.h
–1
1,390 2,072 3,141 4,041 4,837
Efficiency at maximum heat output % 90,5 – 92
Efficiency at minimum heat output % 90,5 – 90
No
x
category 2
Combustion products temperature in smoke flue at
maximum heat output
°C 90 – 120
Combustion products temperature in smoke flue at
minimum heat output
°C 80 – 90
Real volume of dry combustion products at maximum
heat output
m
3
.m
-3
23,33 19,23 23,89 20,66 18,25
Real volume of dry combustion products at minimum
heat output
m
3
.m
-3
25,09 27,52 28,67 23,65 25,09
Connecting gas overpressure mbar 20
Gas overpressure on burner nozzles at maximum heat
output
mbar 13,2 15,8 14,2 14,7 14,6
Gas overpressure on burner nozzles at minimum heat
output
mbar 6,8 7,8 8,9 10,8 10,6
Number of cool. sticks on a tube pcs 3 3 3 3 3
Number of nozzles pcs 2 3 4 5 6
Nozzles diameter mm 2,52 2,52 2,52 2,45 2,45
Connecting gas overpressure mbar 13
Gas overpressure on burner nozzles at maximum heat
output
mbar 10 11 11 11,7 11,5
Gas overpressure on burner nozzles at minimum heat
output
mbar 4,7 4,8 6,8 8,8 8,6
Number of cool. sticks on a tube pcs 3 3 3 3 3
Number of nozzles pcs 2 3 4 5 6
Nozzles diameter mm 2,7 2,7 2,7 2,7 2,7
The boiler is set at nominal values of the power output at the production company according to Table No. 2
(one-stage gas valve - natural gas)