Potterton Sirius WH 50-60-70 Installation, Operation & Maintenance Manual page 18

12.5 fan rpm updating depending on flue lengtH (e.g. figure 7)
To ensure the correct rated heat output to the maximum and minimum heat input, it is necessary to update
the speed (rpm) of the fan, it depends on the length of the flue (par. 12), in accordance with the installation of
flue and air pipes as indicated in the tables below. The factory-set value is referred to the minimum length of
flue pipe (0÷4 m for concentric, 0÷20 m for twin). To carry such updating, changing the speed of the fan (rpm)
at the maximum and minimum heat input, refer to par. 16.
wH 50
ConCentriC PiPe ø 80/125
(C13-C33-C43)
Parametres
Pipes length H536-H613
(m)
Max heat output (rpm)
5500
(*) 0 - 4
5900
5 - 10
(*) Default setting parameters
wH 60
ConCentriC PiPe ø 80/125
(C13-C33-C43)
Parametres
Pipes length
H536-H613
(m)
Max heat output (rpm)
5600
(*) 0 - 4
6000
5 - 10
(*) Default setting parameters
wH 70
ConCentriC PiPe ø 80/125
(C13-C33-C43)
Parametres
Pipes length H536-H613
(m)
Max heat output (rpm)
6000
(*) 0 - 4
6500
5 - 10
(*) Default setting parameters
InstructIons pErtaInInG to thE InstaLLEr
Parametres
H612
Min heat output (rpm)
1900
2100
Parametres
H612
Min heat output (rpm)
1650
1800
Parametres
H612
Min heat output (rpm)
1850
2100
18
91.7.1 - GB/IE