Ambirad COBRA CB40 Manual de instalación, funcionamiento, mantenimiento y servicio - Página 16

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17 Spare parts

Description
Igniter probes
Burner head
Orifice plate gaskets
Combustion fan
Pactrol control box
Gas valve
Red neon
Amber neon
Wiring harness
Neon lamp wiring harness
Burner head wiring
assembly
3 pin mains socket
3 pin fan socket
Silicone tube
Fan air inlet
Burner orifice plate
Injector
Vacuum switch
18 Method for calculating equivalent flue resistance - Appendix 1
Component
Pipe
90˚ bend
135˚ bend
Terminal
100mm spigot
125mm spigot
The formula for calculating the equivalent flue size is as follows:
(Ki + Ko) e
H
= H
x
e
a
(Ki + Ko)a - KeHa + K
where
He is the height of the equivalent flue
Ha is the vertical height of the actual or proposed flue measured from the flue spigot
Ki
is the inlet resistance of the flue
Ko is the outlet resistance from the flue subscript 'e' refers to the equivalent flue diameter subscript 'a' refers to the
actual or proposed flue diameter
Ke is the resistance per unit length of the equivalent flue
K is the resistance (other than the inlet and outlet resistances) of the actual or proposed flue
Note K and K are obtained from the table above
1 4
Part Number
201284
200974
201069 + 201208
2501
2015
2052
2180
2175
900224
200254
900225
2135-5
3123-5
2198
201125
201063-08
201007-24
201013
Internal Size (mm)
100GCI
125 GCI
Inlet resistance of flue (Ki)
Resistance factor (Ke)
100
125
100
125
100
125
2.5
100mm flue
1.0
125mm flue
0.78
per meter
025
1.22
per fitting
0.5
0.61
per fitting
0.25
0.6
per fitting
0.25
Outlet resistance of flue (Ko)
2.5
1.0