E.C.A. CALORA PREMIX Installation And User's Operating Instructions page 34

Water Heating Energy Efficiency of Combination Heater (Table 8)
Declared load profile:
Solar Energy Device Contribution
From the solar energy device data sheet
Water Heating Energy Efficiency of the Package under Average Climatic Conditions
Water Heating Energy Efficiency Class of the Package under Average Climatic Conditions
Water Heating Energy Efficiency of the Package under Average Climate Conditions
3
Colder: - 0,2 x
3
Hotter: + 0,4 x
The energy efficiency of the products in the package provided for this data sheet may not represent the actual energy efficiency when
installed in a building, as efficiency is affected by other factors such as heat loss in the distribution system and the sizing of the products
depending on the size and characteristics of the building.
To evaluate the water heating energy efficiencies of combination heater, temperature control and solar device packages, the elements
identified in Table 8 are included here:
- I: water heating energy efficiency value of the combination heater, expressed in %.
- II: Value of the mathematical expression (220.Qref)/Qnonsol. Here, Qref is taken from the product data sheet of the solar energy device in
Annex VII and for the declared M, L, XL or XXL load profiles of the Qnonsol combination heater.
- III: Value of the mathematical expression (Qaux .2,5)/ (220.Qref) expressed as a %. Here, Qaux is taken from the product data sheet of the
solar device and Qref is taken from Table 8 in Annex VII for the declared M, L, XL or XXL load profiles.
Weighting of Combi Boilers
For Table 7 of this Annex, weighting of priority boiler space heater or boiler combination heater and auxiliary heater (*)
(1)(2)
Psup / (Prated+Psup)
0
0.1
0.2
0.3
0.4
0.5
0.6
≥ 0.7
(1) Intermediate values ​ ​ a re calculated by linear interpolation between two adjacent values.
(2) Prated is primarily associated with central heating and combination heater.
2
=
2
=
II, Package Without Hot Water Storage Tank
0
0.3
0.55
0.75
0.85
0.95
0.98
1
34
Auxiliary Electric
( 1.1 x 'I' - 10 % ) x 'II' - 'III' - 'I' =
%
%
II, Package with Hot Water Storage Tank
1
"I" %
2
+ %
3
%
0
0.37
0.70
0.85
0.94
0.98
1
1