Unigas R91 VS Series, Manual Of Installation - Use - Maintenance, Page: 7 / 60

7
Country and usefulness gas categories
Matching the burner to the boiler
To correctly match the burner to the boiler verify the necessary input and the pressure in combustion chamber are included in the bur-
ner performance curve; otherwise the choice of the burner must be revised consulting the burner manufacturer.
BURNER TYPE R515..VS R520..VS R525..VS
Output min. - max. kW
770 - 5200 1000 - 6400 2000 - 8000
Fuel
Category
see next paragraph ”Gas category”
Gas rate min - max (Stm
3
/h)
81.5 - 550 106 - 677 212 - 847
Gas pressure
min.- max. mbar (see Note 2)
Power supply 400V 3N ~ 50Hz
Total power consumption
kW 11.5 15.5 19
Electric motor
kW 11 15 18.5
Protection
IP40
Approx. weight
kg 550 560 570
Operation
Gas Train50 /Gas connection
2” / Rp2 2” / Rp2 -
Gas Train65 /Gas connection
2”1/2 / DN65 2”1/2 / DN65 2”1/2 / DN65
Gas Train /Gas connection
3” / DN80 3” / DN80 3” / DNN80
Gas Train /Gas connection
4” / DN100 4” / DN100 4” / DN100
Operating temperature °C
-10 / +50
Storage Temperature °C
-20 / +60
Working service
Intermittent
Note1:
All gas flow rates are referred to Stm
3
/h (1013 mbar pressure, 15 °C temperature) and are valid for G20 Natural gas (nett
calorific value: 34.02 MJ/Stm
3
).
Note2: Maximum gas pressure = 500mbar (with Siemens VGD gas valves).
Minimum gas pressure = see gas curves.
GAS
CATEGORY
COUNTRY
I
2H
AT ES GR SE FI IE HU IS NO CZ DK GB IT PT CY EE LV SI MT SK BG LT RO TR CH
I
2E
LU PL - - - - - - - - - - - - - - - - - - - - - - -
I
2E( R ) B
BE - - - - - - - - - - - - - - - - - - - - - - - -
I
2L
NL - - - - - - - - - - - - - - - - - - - - - - - -
I
2ELL
DE - - - - - - - - - - - - - - - - - - - - - - - -
I
2Er
FR - - - - - - - - - - - - - - - - - - - - - - - -
M
G
- Natural gas-Light oil
Progressive Fully modulating