8
Grant Euroflame Condensing External Modules
3 - BOILER TECHNICAL INFORMATION
Note: Grant Euroflame condensing boilers are only for use with kerosene.
Grant Euroflame condensing oil boilers using Class C2 kerosene
3.3
(kW)
15.1
18.1
20.7
20.7
22.7
25.6
25.6
30.8
34.7
(Btu/h)
51,500
61,750
70,600
70,600
77,500
87,350
87,350
105,100
118,400
Nozzle
0.50/80°EH
0.55/80°EH
0.60/80°EH
0.60/80°EH
0.65/80°EH
0.75/80°EH
0.75/80°EH
0.85/80°EH
1.00/80°EH
Oil
press.
(bar)
7.0
7.5
8.5
8.5
8.5
8.0
8.0
9.1
8.0
Smoke
No.
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
Fuel flow
rate
(kg/h)
1.29
1.53
1.78
1.78
1.95
2.19
2.19
2.65
2.93
Flue
70 - 75
75 - 80
80 - 85
85 - 90
85 - 90
90 - 95
75 - 80
85 - 90
90 - 95
CO
2
(%)
11 - 12
11 - 12
11 - 12
11 - 12
11 - 12
11 - 12
11 - 12
11 - 12
11 - 12
Heat Output
50/70
Riello RDB2.2
70/90
Riello RDB2.2
90/120
Riello RDB2.2
Model and
burner type
Sealed system data - Euroflame condensing modules with sealed system kit
3.2
Heating system pressure (cold)
Operating pressure of pressure relief valve
Expansion vessel size
Max heating system volume (including boiler)*
Cold water mains connection (for filling loop)
Pressure relief valve discharge connection
Maximum 1.0 bar, Minimum 0.5 bar
2.5 bar
12 litres (pre-charged at 1 bar)
128 litres (approximately)
15 mm compression (provided)
15 mm compression (provided)
* Based on vessel charge and system cold fill pressure of 0.5 bar
HARP/SEDBUK
efficiency
Disc setting B
Disc setting C
Disc setting C
Fixed
Fixed
Fixed
Fixed
Fixed
Fixed
Burner
head/disc
setting
*
*
*
Notes:
1 The data given above is approximate only and based on the boiler using a low level flue.
2 The above settings may have to be adjusted on site for the correct operation of the burner.
3 Gas Oil is not suitable for use with the Grant Euroflame condensing boiler range.
4 The net flue gas temperatures given above are ± 10%.
5 When commissioning the air damper must be adjusted to obtain the correct CO
2
level.
6 * Factory settings: 50/70 - 18.1 kW, 70/90 - 22.7 kW, 90/120 - 30.8 kW.
7 The combustion door test point may be used for CO
2
and smoke readings only. Do not use this test point for temperature or
efficiency readings.
8 When setting the 50/70 to 15.1 kW output the burner air adjuster disc requires repositioning. Refer to Section 7 Commissioning.
When setting the 70/90 to 20.7 kW output the combustion head must be changed. Refer to Section 9.2 Cleaning the burner.
When setting the 90/120 to 25.6 kW output the combustion head must be changed. Refer to Section 9.4 Cleaning the burner.
9 The installer must amend the boiler data label if the output is changed.
Flue gas analysis
1 Insert a combustion probe into the end of the flue terminal to measure the CO
2
level. Do not use the test point in the cleaning
door.
To obtain the correct CO2 level the final flue gas reading must be taken with all the casing panels fitted.
2 The boiler efficiency and temperature must be taken from the flue test point on high level and vertical flue adaptors.
3 Low level flues do not contain a test point. The temperature and efficiency readings must be taken from the flue terminal.
Burner
head
type
T1
T1
T1
T1
T2
T2
T2
T3
T3
Flue gas temp °C
Door
155 - 160
175 - 180
185 - 190
195 - 200
205 - 210
215 - 220
190 - 195
215 - 220
220 - 225
(%)
93.0
92.4
92.1
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