Installation and operating instruction
Oil burner WL20/2-C Z
4 Installation
83307702 1/2019-04 La
20-80
4.2 Selecting the nozzles
Determine the size of the nozzle relative to the load distribution.
Load distribution
The oil throughput at stage 2 equates to 100 % of the total load.
Divide total load (100 %) between the 2 oil nozzles:
stage 1 must lie within the capacity graph,
observe capacity range of boiler,
observe flue gas temperature (boiler, chimney),
observe heat demand,
observe start behaviour of burner.
Typical distribution of load, a different distribution may be required:
Nozzle 1: 60 %
Nozzle 2: 40 %
Example
Burner capacity required: approx. 165 kW
60 % of burner capacity required: 165 kW × 0.6 = 99 KW
40 % of burner capacity required: 165 kW × 0.4 = 66 kW
Nozzle size at 12 bar, see nozzle selection table:
Nozzle 1 (99 kW): 2.00 gph
Nozzle 2 (66 kW): 1.35 gph
Recommended nozzles
Make
Characteristics
Fluidics
45°SF
(1
, 60°SF
Steinen
60°S
(2
(1
Only from 12 bar pump pressure and single pipe system (higher oil temperat-
ures).
(2
We recommend Fluidics nozzles for nozzle size 1.00 ... 1.10 gph.
Pump pressure setting
10 …
12
… 14 bar
Spray characteristic and spray angle varies depending on pump pressure.