Rendamax R2000 Series, Техническая документация инструкция

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28
DOC2012/2000en
Open vent and cold feed
An open vent pipe must be fitted in open systems not more than one meter along the flow pipe and must rise
continuously by the shortest route to the venting point without valving and with frost protection where necessary.
Vent pipes and cold feed pipes should be sized as follows.
Rated output (kW) Open vent Cold feed
Below 60
60 - 150
150 - 300
300 - 600
Above 600 25 mm (1“)
32 mm (1¼“)
38 mm 1½“)
50 mm (2“)
63 mm 2½“) 19 mm (¾“)
25 mm (1“)
32 mm (1¼“)
38 mm 1½“)
59 mm (2“)
See Technical data table for individual boiler outputs.
Table 6 Vent pipes and cold feed pipes size
Sealed systems
Normal operating pressure with nominal flow rate.
Flow temperature
°C
Minimum operating pressure
bar
80
90 > 1,5
> 2,0
Standard pressure release setting 3 bar.
Table 7 Minimum operating pressures at nominal fl ow rate
Boiler model By pass size
R2017 - R2022
R2028 - R2041
R2041 - R2090
R2105 - R2122 1“
1½“
2“
2½“
Table 5 By pass size