elco AEROTOP T Series, Planning Document

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Planning Notes
Configuration of Pressure Expansion Vessels
VN = VA x F x X
Key
Vn
= Expansion volume
VA = System content acc. to
list below
F = Temperature-dependent
Factor
40°C 50°C 60°C 80°C
0,0079 0,0121 0,0171 0,029
TZ = Average system temperature TZ = (TV + TR)/2
= F
Up to 30 kW X = 3,0
31 - 150 kW X = 2,0
above 150 kW X = 1,5
Safety factor for boiler output
X = Safety factor
Important
Water contents of hot water tanks
(buffer storage) are not considered in
the table and must be added
separately.
1 = Floor heating
2 = Radiators
3 = Heating panels
Select the expansion vessel based on
the expansion volume and the system
height Hp. The system height Hp is the
height from the middle of the expansion
vessel up to the upper point of the
heating unit.
Type
0,5 bar 0,8 bar 1,0 bar 1,2 bar 1,5 bar 1,8 bar
PND 18 10,3 8,7 7,7 6,6 5,1 3,5
PND 25 14,3 12,0 10,7 9,1 7,1 4,7
PND 35 20,2 17,0 15,0 13,0 10,0 7,0
PND 50 28,6 24,4 21,4 18,5 14,3 9,8
PND 80 45,7 38,6 34,3 29,7 22,9 16,5
max. height Hp 2 m 5 m 7 m 9 m 12 m 15 m
Initial Pressure in Empty Vessel (= Hp + 0,3 bar)
11
Boiler output (kW)
VA sy
stem
capa
city
(lit
er)