Burner Description - Riello RS 28/M Installation, Use And Maintenance Instructions

3.8

Burner description

20
23
20183588
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Sleeve
5 Low air pressure switch
(differential operating type)
6 Flame sensor probe (flame rod)
7 Air pressure test point
8 Gas pressure test point and head fixing screw
9 Screws securing fan to sleeve
10 Slide bars for opening the burner and inspecting the combus-
tion head
11 Servomotor controlling the gas butterfly valve and air damper
(by means of a variable profile cam mechanism).
When the burner is not operating the air damper is fully closed
in order to reduce heat loss.
12 Plate with four hole knock-outs for electrical cable routing
13 Air inlet to fan
14 Gas input connection
15 Gas butterfly valve
16 Boiler mounting flange
17 Flame stability disk
18 Flame inspection window
19 Ignition pilot
20 Flame safeguard
21 Plug-socket on flame rod probe cable
22 Air damper
23 Protection (for RS 50/M single-phase burner)
24 Fan motor
20154169
Technical description of the burner
11
24 18
20183685
14 15 16 17
13
12
1
6
3
4
22
5
Two types of burner failure may occur:
• FLAME SAFEGUARD LOCK-OUT: if the flame relay
20)(Fig. 4) push-button lights up, it indicates that the burner is
in lock-out. To reset, press the push-button.
• MOTOR TRIP (RS 38 - 50 three-phase): release by pressing
the push-button on thermal overload).
10 GB
20183686
9
10
21
19
2
7
8
Fig. 4