Riello RS 28, Installation, Use And Maintenance Instructions

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45 20144599 GB
Appendix - Electrical panel layout
WIRING DIAGRAM KEY
DIAGRAM A
C Capacitor
CMV Motor contactor
DA Control box (RMG)
F1 Filter to protect against radio disturbance
K1 Relay
I1 Switch: burner on-off
I2 Switch: 1° - 2° stage
MV Fan motor
PA Air pressure switch
RT Thermal relay
SM Servomotor
SO Ionisation probe
SP Plug-socket
TA Ignition transformer
TB Burner earth
XP4 4-pole socket
XP5 5-pole socket
XP6 6-pole socket
XP7 7-pole socket
DIAGRAM (B)
Electrical connection without gas valve leak detection
control
DIAGRAM (C)
Electrical connection with gas valve leak detection control
h1 1st stage hour counter
h2 2nd stage hour counter
IN Burner manual stop electric switch
XP Plug for leak detection control
X4 4-pole plug
X5 5-pole plug
X6 6-pole plug
X7 7-pole plug
PC Gas pressure switch for leak detection control
PG Min. gas pressure switch
S Remote lockout signal
S1 Remote lockout signal due to leak detection control
TR Adjustment remote control: controls 1st and 2nd stage
operation.
If you want the burner to have one-stage operation,
replace the TR with a jumper.
TL Limit remote control: shuts down the burner when the
temperature or pressure in the boiler reaches the
maximum pre-set value.
TS Safety remote control: intervenes in the event of TL
failure.
VPS Valve leak detection control device
VR Adjustment valve
VS Safety valve
ATTENTION
In the case of a phase/phase power supply, it is
necessary to install a jumper in the control box
terminal board, between clamp 6 and the earthing
clamp.
ATTENTION

The RS 38 and RS 50 three-phase models
leave the factory pre-set for
400 V power
supply.

If 230 V power supply is used, change the
motor connection (from star to delta) and
change the calibration of the thermal relay as
well.
ATTENTION
The leak detection control takes place immediately
before each burner start-up.