44
ENGLISH
Product efficiency characteristics:
Description
POWER X
35 / 35 R.S.I.
50 DEP / 50
DEP R.S.I.
50 / 50 R.S.I.
Maximum rated heat input
35
38,6
50
kW
Minimum rated heat input
5,8
15
15
kW
Domestic hot water maximum rated thermal input (80-
60)
kW
Domestic hot water minimum rated thermal input (80-
60)
kW
Parameter
Seasonal heating energy efficiency class
A
A
A
-
Water heating energy efficiency class
-
-
-
Rated input
31,5
34,1
44,2
kW
Seasonal energy efficiency in central heating mode
92,8
92,4
92,5
%
useful heat output
at rated thermal input and at high temperature rating
30,9
34,1
44,2
kW
at 30% of rated thermal input and at low temperature
rating
11,4
12,6
16,3
kW
Efficiency
at rated thermal input and at high temperature rating
88,3
88,4
88,4
%
at 30% of rated thermal input and at low temperature
rating
98,2
97
97,8
%
Auxiliary electric consumption
at full load
88
77
80
W
at partial load
38
24
24
W
in stand-by
2
2
2
W
Other parameters
Heat losses in standby
400
341
442
W
Energy consumption of the pilot light
-
-
-
W
Annual energy consumption
66
72,8
94,2
GJ
Level of inner sound power
53
58,2
58,2
dB
Emissions of nitrogen oxides
35
38,5
38,5
mg/kWh
2 7 Pump
The
POWER X
boilers come equipped with high-efficiency
self-modulating circulators, with the electrical and water
connections already complete.
The boiler is equipped with an anti-blocking system, which
activates an operating cycle after every 24 hours of disuse,
regardless of the mode selector's position.
b
The "anti-blocking" function is only enabled if the boil-
ers are receiving electrical power.
b
It is strictly forbidden to operate the circulator without
water.
b
A minimum flow rate of 800l/h must be guaranteed
within the boiler in order to prevent the differential
pressure switch from being triggered.
The curve of the head available for the system, depending
on the water flow rate, is shown below (the boiler's load
losses have already been calculated).
The indicated flow rates refer to the maximum speed.
In fact, the modulating circulator can adjust the speed in
order to obtain a constant temperature difference between
the delivery and return lines, as well as to always obtain the
maximum efficiency.
0
1
2
3
4
5
0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2
6
7
Residual discharge head (m W
.C.)
System flow rate m
3
/h
Fig. 6
The figure showing the residual discharge head only con-
tains the graph for the pump's maximum speed.
