8
Grant Vortex Outdoor Module
3 - BOILER TECHNICAL INFORMATION
Note: Grant Vortex boilers are only for use with kerosene.
Grant Vortex oil boilers using Class C2 kerosene
3.3
Heating system pressure (cold)
Operating pressure of pressure relief valve
Expansion vessel size (15/26)
Expansion vessel size (26,36 and 36/46)
Max heating system volume (including boiler) (15/26)
Max heating system volume (including boiler) (26/36 and 36/46)
Cold water mains connection
Pressure relief valve discharge connection
Circulating pump (15/26)
Circulating pump (26/36 and 36/46)
Maximum 1.0 bar, Minimum 0.5 bar
2.5 bar
12 litres (pre-charged at 1 bar)
16 litres (pre-charged at 1 bar)
75 litres (approximately)
120 litres (approximately)
15 mm copper pipe
15 mm copper pipe
6 m Head
7 m Head
Sealed system data
3.2
Notes:
1 The data given above is approximate only.
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 Vortex boiler range.
4 * Net thermal efficiency.
5 The net flue gas temperatures given above are ± 10%.
6 When commissioning the air damper must be adjusted to obtain the correct CO
2
level.
7 ** Factory settings: 15/26 - 23 kW, 26/36 - 31.5 kW, 36/46 - 41.5 kW.
8 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.
9 When setting the 15/26 to 15 or 20 kW the combustion head must be changed.
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:
1. The test point is for CO
2
and smoke readings only.
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.
(kW)
15.0
20.0
23.0
26.0
26.0
31.5
36.0
36.0
41.5
46.0
(Btu/h)
51 180
68 240
78 475
88 700
88 700
107 500
123 000
123 000
142 000
157 000
100.4
101.0
101.0
101.5
101.5
101.5
101.5
101.5
98.5
97.0
Nozzle
0.50/80°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
1.00/80°EH
1.20/80°S
1.25/80°S
Oil
press.
(bar)
7.0
8.0
8.5
8.0
8.0
9.0
9.1
9.0
8.0
8.0
Smoke
No.
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
0 - 1
Fuel flow
rate
(kg/h)
1.25
1.67
1.94
2.18
2.18
2.57
3.01
3.01
3.56
3.90
Flue gas
temp.
(°C)
60 - 65
65 - 70
70 - 75
68
68
70
78
78
80
88
CO
2
(%)
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
Burner
head
T1
T1
T2
T2
T3
T3
T3
T3
T5
T5
Heat Output
Net
eff *
(%)
15/26
26/36
36/46
Model
**
**
**
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