KN_NXXXX_R0
Solar Keymark Network
Equivalence of absorbers in FPCs except absorber coating – examples (informal)
1. Single collectors
Collectors on
certificate
1
1
1
1
1
1
1
1
Change of
Header pipe diameter
(Error! Reference source
not found.)
Header pipe thickness
(Error! Reference source
not found.)
Manufacturer
wants to
Substitute
Substitute
Header pipe diameter
(Error! Reference source
not found.)
Header pipe thickness
(Error! Reference source
not found.)
Nominal thickness of
absorber sheet (4)
Sell in parallel
Nominal thickness of
absorber sheet (4)
Material of pipes (2)
Material of pipes (2)
Sell in parallel
What to do?
Testing according to table 1 considering remark 1
Compare results of “old” absorber
< 2%points  OK for 1 certificate; Transient phase of 1 year
Testing according to table 1 considering remark 1
Compare results of “old” absorber
> 2%points  not for 1 certificate
New certificate necessary; Old certificate can be deleted, if
manufacturer wants to
Testing according to table 1 considering remark 1
New certificate with new results
Sell in parallel
Testing according to table 1
New certificate with new results
Substitute
Testing according to table 1
Compare results of “old” absorber
< 2%points  OK for 1 certificate; Transient phase of 1 year
Testing according to table 1; New certificate with new results
Substitute
Sell in parallel
Not possible
Testing according to table 1
New certificate with new results; Old certificate can be deleted, if
manufacturer wants to
106729311
KN_NXXXX_R0
Solar Keymark Network
2. Collector families
Collectors on
certificate
>1
>1
>1
>1
>1
Change of
Type of connection of
absorber sheet and
absorber pipe (Error!
Reference source not
found.)
Type of connection of
absorber sheet and
absorber pipe (Error!
Reference source not
found.)
Material of pipes (2),
Nominal thickness of
absorber sheet (4) and
Nominal distance between
absorber pipes (8)
Material of absorber sheet
(1)
Absorber pipes (nominal
diameters, nominal
thickness) (6)
First change is Nominal
thickness of absorber sheet
(4)
After some time another
change of Header pipes
Manufacturer What to do?
wants to
Substitute
Testing according to table 1
Compare results of “old” absorber
< 2%points  OK for 1 certificate
Transient phase of 1 year
Sell in parallel
Testing according to table 1
New certificate with new results
Substitute
Sum of tests according to table 1
Substitution not possible because of modification 2
New certificate with new results
Substitute
Sum of tests according to table 1
Substitution not possible because of modification 1
New certificate with new results
Substitute
First time tests according to table 1 based on original tested collectors
Second time tests according to table 1 based on changed collectors
considering remark 1
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KN_NXXXX_R0
Solar Keymark Network
>1
>1
>1
>1
(nominal diameters,
nominal thickness) (7)
No changes after some
time, but collectors should
be certified with 2 different
absorbers
Vertical and horizontal
collectors
Nominal distance between
absorber pipes (8)
Nominal distance between
absorber pipes (8)
Sell in parallel
One collector must be the basic type
The 2nd collector must be tested according to table 1
2 certificates must be issued
Sell in parallel
Not covered by this rules
Testing and certification on individual base
Testing according to table 1 considering remark 2
Two certificates are needed
Testing according to table 1 considering remark 2
< 2%points  OK for 1 certificate
Transient phase of 1 year
Sell in parallel
Substitute
3. Custom built collectors
Collectors on
certificate
Custom built
Custom built
Custom built
Change of
Material of absorber sheet
(Error! Reference source
not found.)
Nominal thickness of
absorber sheet (Error!
Reference source not
found.)
Header pipes (nominal
diameters, nominal
thickness) (7)
Manufacturer What to do?
wants to
Substitute
Not possible, new certificate necessary
Testing for new certificate according to table 1
Sell parallel
Testing according to table 1
Substitute
No testing because of general remarks
106729311
KN_NXXXX_R0
Solar Keymark Network
106729311