Alpha E-Tec Plus 28NX - Page 70

Alpha E-Tec Plus 28NX, 33NX and 38NX - Energy Classification
12.8 PARAMETERS FOR FILLING IN ASSEMBLY CHART
* To be established by means of table 5 of Regulation 811/2013 in case of “assembly” including a heat pump to integrate the
boiler. In this case the boiler must be considered as the main appliance of the assembly.
Seasonal space heating energy e󰀩ciency of boiler
1
%
Supplementary heat pump
From che of heat pump
Solar contribution AND Supplementary heat pump
Select smaller value
Boiler and supplementary heat pump installed with low temperature heat emitters at 35°C?
From che of heat pump
The energy eciency of the package of products provided for in this che may not correspond to its
actual energy eciency once installed in a building, as the eciency is inuenced by further factors
such as heat loss in the distribution system and the dimensioning of the products in relation to building
size and characteristics.
Seasonal space heating energy e󰀩ciency of package
Seasonal space heating energy e󰀩ciency class of package
Solar contribution
From che of solar device
2
%
+
3
%
±
( - ______ ) x 0,1 =
( - _____ ) x _______ =
0.5 x O 0.5 x =
4
5
6
7
4 5
%
%
%
%
+
+
-
Collector size
(in m
2
)
Tank volume
(in m
3
)
Collector e󰀩ciency
(in %)
Tank rating
A* = 0.95, A = 0.91
B = 0.86, C = 0.83
D-G = 0.81
( ____ x + ____ x ) x (0,9 x ( / 100) x =
G F E D C B A A
+++
A
++
A
+
< 30 % ≥ 30 % ≥ 34 % ≥ 36 % ≥ 75 % ≥ 82 % ≥ 90 % ≥ 98 % ≥ 125 %≥ 150 %
%
7
+ ( 50 x ______ ) =
____
12.7 ROOM HEATING SYSTEM ASSEMBLY CHART
Class I = 1 %, Class II = 2 %,
Class III = 1.5 %, Class IV = 2 %,
Class V = 3 %, Class VI = 4 %,
Class VII = 3.5 %, Class VIII = 5 %
Temperature control
From che of temperature
control
Supplementary boiler
From che of boiler
Seasonal space heating energy a󰀩ciency
(in %)
Seasonal space heating energy a󰀩ciency
(in %)

Parameter E-Tec Plus 28NX E-Tec Plus 33NX E-Tec Plus 38NX
‘I’ 94 94 94
‘II’ * * *
‘III’ 1.11 0.95 0.84
‘IV’ 0.44 0.37 0.33
70