Adisa ADI CD 375, Техническое руководство по установке, использованию и обслуживанию

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ADI CD boiler - Technical Manual
51
17.6 Chimneys
The flues outlet, according to the current rules, must ensure a correct evacuation of the burnt gases, without
backward flows and without producing condensate. The natural draught of the chimney must evacuate the burnt
gases from the boiler flues outlet.
17.6.1 Chimney sizing
The internal diameter depends on:
- Heat input of the boilers, type, number of boilers installed and water working temperatures.
- Type of gas.
- Chimney: vertical height, horizontal length (minimum slope: 3 to 5%).
- Number of elbows and their angles (they should be reduced to the minimum).
- The chimney material and if it is insulated or not.
If several boilers are connected to the same chimney, it is important to consider the distance between them and the
dimensions of the flue header.
The base of the vertical chimney must include a drainage pipe to evacuate the condensate.
With regard to boilers, these are the data to be considered for calculation:
- Values of CO
2
, for Natural Gas: it is recommended to adjust CO
2
at 8.1%, for all the boilers
Models Range CO2 (%) for Natural Gas
ADI CD 70 to 120
7.3 - 9.3%
ADI CD 120 to 175
7.2 - 8.7%
ADI CD 200 to 250
7.3 - 8.8%
ADI CD 325 to 550
7.6 - 8.6%
ADI CD 850 to 950
7.7 - 9.0%
- Flues temperature:
Flues temp.
MAXIMUM POWER MINIMUM POWER
Average Water temperature

High (70ºC) Low (40ºC)
High (70ºC) Low (40ºC)
Flues Temp. 70 - 80ºC 50 - 60ºC 60 - 70ºC 40ºC
- Residual pressure at the boiler flues outlet:
Model
ADI CD
Ø boiler flue outlet
External diam. (mm)
MAXIMUM POWER MINIMUM POWER
Power Input
kW
Residual Pressure
(Pa)
Power Input
kW
Residual Pressure
(Pa)
70
150 72.7
42.0
21.8
2.5
85
150 87.7 37.8 26.3 7.5
105
150 107 90.0 32 40.0
120
150 123 64.8 37 5.0
175
150 166 54.0 49.8 10.0
200
175 202.2 60.0 60.7 7.5
250
175 246.5 81.0 74 8.5
325
250 300.5
90.0
90.2
20.0
375
250 361.2 64.8 108.4 7.5
450
250 448 90.0 134 45.0
550
350 546
72.0
163.9 (*)
10.0
650
350 618 75.0 185.4 (*) 10.0
750
350 700 78.0 210 (*) 7.5
850
350 818.5
177.5
327.4
24.7
950
350 924.5
266.2
369.8
39.4
(*) Minimum power adjustable up to 30% of the gas power: to be adjusted onsite in the installation (during commissioning), according to the installation conditions.