Vortex Combi Oil Boilers Using Class C2 Kerosene; Flue Gas Analysis - Grant Combi 70 V3 User's Installation Manual

4 - BOILER TECHNICAL INFORMATION
4.6

Vortex Combi oil boilers using Class C2 kerosene

Note: Vortex Combi boilers are only for use with kerosene.
Burner
Model Heat Output
type
(kW)
Riello RDB1
26.0
26
Riello RDB2.1
36 36.0
Notes:
1 The data given above is approximate only and is based on the boiler being used with a low level balanced 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 a Grant Vortex Combi boiler.
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
7 The combustion door test point may be used for CO
or efficiency readings.

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. The boiler efficiency and temperature must be taken from the flue test point on high level, vertical and
conventional flue adaptors.
3. Concentric low level flues do not contain a test point. The temperature and efficiency readings must be taken from
the flue terminal.
Net
Nozzle
eff *
(%)
(Btu/h)
88 700 101.0 0.75/80°EH
123 000 101.5 1.00/80°EH
and smoke readings only.
2
Combi V3, Combi Max and Vortex Combi models
Oil Smoke Burner
press. No. head
(bar)
8.0 0 - 1
T2
9.1 0 - 1 T5
and smoke readings only. Do not use this test point for temperature
2
Fuel flow Flue gas CO
2
rate temp.
(kg/h) (°C) (%)
2.16 75 - 80 12.0
3.01 78 12.0
level.
2
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