Valtis Ogrevanje d.o.o.
Instructions for installers and maintenance workers
Characteristics of the boiler
VIVA GT 25
VIVA GT 35
Unit
Boiler weight
596
596
kg
The volume of water in the boiler
184
184
I
Fuel storage tank volume
135
135
I
Dimensions of the fuel inlet
350 x 430
350 x 430
mm
Max. operating pressure
2
2
bar
Maximum temperature hot water duck
85
85
°C
Minimum return temperature
55
55
°C
Fuel consumption
6.21 / NP
8.54 / NP
kg/h
*Efficiency (EN 303-5:2012)
90.50
90.80
%
Thermal output
24.81
34.19 / NP
kW
Output range
rated output only
rated output only
kW
Boiler connection voltage
230 / 50
230 / 50
V/Hz
Required chimney draft
10 - 15
10 - 15
Pa
Fumes temperature
100-200
100-200
°C
Test pressure
4.5
4.5
bar
Boiler class (EN303-5:2012)
5
5
/
Combustion period
2 - 6
6
h
Boiler water settings
70 - 85
70 - 85
°C
Fumes flow
0.0146 / NP
0.0185 / NP
kg/s
Water resistance (∆t=10K)
102
160
mbar
Water resistance (∆t=20K)
25
47
mbar
Hot water reservoir
1000
1500
I
Protection water temperature and
pressure
20 / 2
20 / 2
°C /
bar
Diameter of the chimney connection
130
130
mm
Electrical power
59 / NP / 3
64 / NP / 3
W
Noise emission
> 70
> 70
db(A)
Condensing boiler
no
no
/
Operation at excess or negative pressure
negative pressure
negative pressure
/
Operation with or without fan
with fan
with fan
/
