Burner Description; Weight - Approximate Measurements - Riello RL 190 Two-Stage Operation

4.2

Burner description

RL 190
Technical description of the burner
D3930
Fig. 1
kg
75
Tab. A
7 GB
1 Ignition electrodes
2 Combustion head
3 Screw for combustion head adjustment
4 Screw for fixing fan to flange
5 Pump
6 Hydraulic cylinder for regulation of the air gate valve in 1st
and 2nd stage positions. When the burner is not operating
the air gate valve is fully closed in order to reduce heat dis-
persion from the boiler due to the flue draught which draws
air from the fan suction inlet.
7 Air inlet to fan
8 Air gate valves
9 Fan pressure test point
10 Boiler mounting flange
11 Flame stability disk
12 Slide bars for opening the burner and inspecting the com-
bustion head
13 Extensions for slide bars 12)
14 Electrical motor
15 Ignition transformer
16 Motor contactor and thermal cut-out with reset button
17 1st stage valve
18 Terminal strip
19 Two switches:
- one "burner off - on"
- one for "1st - 2nd stage operation"
20 Fairleads for wiring carried out by the installer
21 Control box with lock-out pilot light and lock-out reset button
22 Flame inspection window
23 Photoresistor for flame presence control
24 2nd stage valve
25 Safety solenoid valve
Two types of burner failure may occur:
Control box lock-out: if the control box 22)(Fig. 1) pushbutton
(red led) lights up, it indicates that the burner is in lock-out.
To reset, hold the pushbutton down for between 1 and 3 seconds.
Motor trip: release by pressing the pushbutton on thermal cut-
out 17)(Fig. 1).
4.2.1

Weight - approximate measurements

• The weight of the burner complete with its packaging is
shown in table (Tab. A)
20044168