Mark NFRA AQUA ECO Livret Technique page 8

l = Expansion in mm
2
l = Section length mm
1
α
= Linear expansion coefficient of steel => 11.7x10
T = Average water temperature.
w gem
T = Temperature in the room.
omg
Determine the expansion of 1 section length:
x (1 + α x (T
l = l
2 1 w gem
l = 42000 x (1 + 11.7x10
2
l = 42028.3mm
2
Expansion U = 28.3mm
Expansion table [11].
4.2 Order of installation. [4]
– Fit the suspension points [9][10]
– The panels can be mounted directly to threaded rod or hung from chains [12].
– Join the panels together using the push-on fittings.
– Install the distributors [3].
– Add the insulation.
– Place covers, if required, on the panel connections and distributors [4].
5.0 Start-up
Fill the installation with water, bleed the pipes and rinse through to remove any contamination.
Adjust any flow controls. Ensure that the water mass flow does not fall below that indicated in the
table [7]. If the water mass flow is lower, output cannot be guaranteed.
Key table [7]
TR = water return temperature in °C
W = minimum mass flow of water per pipe in kg/h
6.0 Maintenance
Clean the panels regularly, check them for leaks and check the suspension points. If applicable, ask
a qualified installer for maintenance advice.
8
– T )
omg
-6 (57.5 – 0))
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