10
2.4 Technical data
Burner pressures indicated in the following table must be checked after the boiler has been operating for 3
minutes.
BURNER PRESSURE
(mbar)
BOILER
MODEL
HEAT OUPUT
(kW)
HEAT INPUT
(kW)
Natural gas
Butane
Propane
NIAS 24 BTN
23.8
12.5 – 26.5
2.9 – 12.3
5.3 – 23.5
7.1 – 30.3
NIAS 24 BTFS
24.0
12.5 – 26.5
3.2 – 13.2
5.8 – 25.1
7.6 – 32.2
DHW production by 45 °C
∆
t = 7,6 lts/min.
DHW production by 35 °C
∆
t = 9,8lts/min.
DHW production by 40 °C
∆
t = 8,6 lts/min.
DHW production by 30 °C
∆
t = 11,4 lts/min.
45 °C DHW supply during the first 10 minutes (storage tank water 60 °C – cold water 10 °C) = 116 l
BURNER PRESSURE
(mbar)
BOILER
MODEL
HEAT OUPUT
(kW)
HEAT INPUT
(kW)
Natural gas
Butane
Propane
NIAS 28 BTN
28.2
13.5 – 31.0
3.0 – 13.7
4.9 – 26.8
6.9 – 34.6
NIAS 28 BTFS
28.3
13.5 – 31.0
2.8 – 13.3
5.1 – 27.3
6.8 – 35.2
DHW production by 45 °C
∆
t = 8.9 lts/min.
DHW production by 35 °C
∆
t = 11.5 lts/min.
DHW production by 40 °C
∆
t = 10 lts/min.
DHW production by 30 °C
∆
t = 13.4 lts/min.
45 °C DHW supply during the first 10 minutes (storage tank water 60 °C – cold water 10 °C) = 135 l
pic. 4
1 Three-way thermostatic valve
2 Low water pressure sensor
3 Circulating pump with built-in deareator
4 Ignition board
5 Gas valve
6 Ignition electrode
7 Burner
8 Detection electrode
9 Heat exchanger
10 Manual air purging valve
11 Temperature probe
12 Expansion vessel (heating system)
13 Optional expansion vessel (DHW system)
14 Water storage tank anode
15 Water storage tank
16 Water storage tank thermostat
17 Overheating shutdown sensor
18 Safety valve 3 bar
19 Safety valve 7 bar
20 Water storage tank drain cock
21 Flue gas safety thermostat
22 Filling tap
23 Adjustable by-pass
24 No-return valve
25 Flue fan
C DHW flow
F Cold water inlet
G Gas supply
M Central heating flow
R Central heating return
NIAS BTFS 24 – NIAS BTFS 28
Summary of Contents for NIAS BTN 28
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