Potterton Sirius WH 50-60-70 Installation, Operation & Maintenance Manual page 31

IMportant: in the case of conversion from natural gas to propane (LPG), the following operations must be
performed before calibrating the gas valve as illustrated previously:
• Turn adjuster screw (V) on the gas valve through the number of complete revolutions specified in table 3.
CO max. heat output
2
CO min. heat output
2
table 1
Gas consumption at 15 °C
1013 mbar
gas G20 - 2H - 20 mbar
PCI (MJ/m ) NET
3
Consumption at max. heat output (m
Consumption at min. heat output (m
Gas nozzle (mm)
table 2
Gas consumption at 15 °C
1013 mbar
gas G31 - 3P - 37 mbar
PCI (MJ/Kg) NET
Consumption at max. heat output (Kg/h)
Consumption at min. heat output (Kg/h)
Gas nozzle (mm)
table 2.1
Model
wH 50
wH 60
wH 70
table 3
InstructIons pErtaInInG to thE InstaLLEr
G20 - 2H - 20 mbar
8.7 %
8.4 %
wH 50
34.02
/h) 4.91
3
/h) 1.58
3
8.5
wH 50
46.34
3.60
1.16
8.5
Counter clockwise
turns of screw
(V)
3
3 /
3
4
4 /
3
4
G31 - 3P - 37 mbar
10 %
9.8 %
wH 60
34.02
6.00
1.69
15
wH 60
46.34
4.40
1.24
15
1
wH 70
34.02
7.08
2.11
---
wH 70
46.34
5.20
1.55
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91.7.1 - GB/IE