Section 2: Technical Data Page 7
2.2 BURNER SETTINGS
Table 2-2: Burner settings
Boiler
models
(burner
type)
Heat output
Nozzle
Oil
pressure
(bar)
Smoke
No.
Burner
head
type
Burner
head/
air disc
setting
Distance
D ¹⁰
(mm)
Fuel
fl ow rate
(kg/h)
Flue gas
temp.
(°C)
CO
2
(%)
Flue
gas
VFR ‡
(m³/hr)
(kW) (Btu/h)
Eurofl ame
50/90
(Riello
RDB2.2 BX
E21/26)
15 51,200 0.45 80°EH 8.0 0 - 1 n/a Disc: B 11 1.28 70-75 12.5 16.0
21 71600* 0.60 60°ES 8.0 0 - 1 n/a Disc: C 13 1.81 85-90 12.5 23.0
26 88,700 0.75 60°ES 8.5 0 - 1 n/a N/A 15 2.24 90-95 12.5 28.5
Eurofl ame
90/120
(Riello
RDB2.2 BX
V26/36)
26 88,700 0.75 60°ES 8.5 0 - 1 BX 700 N/A 15 2.24 75 - 80 12.5 28.5
31 105,700* 0.85 60°ES 9.0 0 - 1 BX 700 N/A 16 2.67 85 - 90 12.5 34.5
35 119,400 1.00 60°ES 8.5 0 - 1 BX 700 N/A 17.5 3.02 90 - 95 12.5 39.0
Vortex 15/26
(Riello
RDB2.2 BX
V15/26)
15 51,200 0.45 80°EH 8.0 0-1 BX 500 Disc: B 11.5 1.25 60-65 12.5 16.0
21 71,600* 0.60 60°ES 8.0 0-1 BX 500 Disc: C 13 1.75 65-70 12.5 23.0
26 88,700 0.75 60°ES 8.5 0-1 BX 500 N/A 15 2.16 75-80 12.5 28.5
Vortex 26/36
(Riello
RDB2.2 BX
V26/36)
26 88,700 0.75 60°ES 8.0 0-1 BX 700 N/A 15 2.16 65-70 12.5 28.5
31 105,700* 0.85 60°ES 9.0 0-1 BX 700 N/A 16 2.58 70-75 12.5 34.5
36 122,800 1.00 60°ES 9.0 0-1 BX 700 N/A 17.5 2.99 75-80 12.5 39.5
Vortex 36/46
(Riello
RDB2.2 BX
V36/46)
36 122,800 1.00 60°ES 9.0 0-1 BX 700 N/A 17.5 3.09 75 - 80 12.5 39.5
41 140,000* 1.10 60°ES 10.0 0-1 BX 700 N/A 17.5 3.52 80 - 85 12.5 45.5
46 157,000 1.25 60°S 8.0 0-1 BX 700 N/A 20 3.95 85 - 90 12.5 51.0
Boilerhouse
46/70
(Riello
RDB3.2
VORT 70)
46 157,000 1.25 80°S 8.0 0-1 GIB 0 N/A 3.92 75-80 12.5 51.0
64 218,300* 1.50 45°H 10.5 0-1 GIB 2 N/A 5.49 75-80 12.5 72.5
70 238,800 2.00 45°S 8.5 0-1 GIB 2 N/A 6.00 75-80 12.5 78.5
Notes:
‡ Flue gas VFR: Flue gas volumetric fl ow rate
1. The data given above is approximate only and is based on the boiler being used with a low level balanced fl ue.
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 Grant boiler range
4. The fl ue 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: 15/26 - 21.0kW, 26/36 - 31kW, 36/46 - 41.0kW, 46/70 - 64kW, EF15/26 - 21.0kW, 26/35 - 31kW
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 e ciency readings.
8. When setting the 15/26 to 26.0kW output, the air disc must be removed. Refer to Section 10.4 (Air Adjuster Disc).
When setting the 46/70 to 64kW the burner head requires repositioning. Refer to Section 10 (Commissioning).
9. The installer must amend the boiler data label if the output is changed.
10. Refer to Section 10.2 for information on how to set distance D (Figure 10-7).
11. The boiler should be run for 10 to 15 minutes for accurate Flue Gas Analysis test results.
2.3 FLUE GAS ANALYSIS
To allow the boiler to be commissioned and serviced, the boiler is supplied with a combustion test point on the front cleaning door.
When this test point is used please note the following:
• The test point is for CO
2
and smoke readings only.
• The boiler e ciency and temperature must be taken from the fl ue test point on high level, vertical and conventional fl ue adaptors.
• Concentric low level fl ues do not contain a test point. The temperature and e ciency readings must be taken from the fl ue terminal.
2.4 WATER CONNECTIONS
Table 2-3: Water connections
Boiler model
Flow connection Return connection
Size Fitting Supplied Size Fitting Supplied
15/21 1 BSP BSP female Fitted 1 BSP BSP female Fitted
21/26 1 BSP BSP female Fitted 1 BSP BSP female Fitted
26/36 28mm pipe Compression In fi ttings kit 1 BSP BSP female Fitted
36/46 28mm pipe* Compression In fi ttings kit* 1 BSP BSP female Fitted
46/58 1¼ BSP BSP female Fitted 1¼ BSP BSP female Fitted
58/70 1¼ BSP BSP female Fitted 1¼ BSP BSP female Fitted
* The pipe and compression fi tting are placed under the blanking plate that covers the fl ow connection.
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