Riello RL 70 Installation, Use And Maintenance Instructions page 11

ELECTRICAL CONNECTIONS
(A)
RL 70
220V
F A gG/gL 10
L 2 1,5
mm
(B)
CALIBRATION OF THEREMAL RELAY
(C)
RL 100
380V 220V 380V
6 20 10
1,5 2,5 1,5
D3312
RL 130
220V 380V
20 10
2,5 1,5
20083349
20083350
9
ELECTRICAL CONNECTIONS (A)
set up by the installer
Use flexible cables according to regulation EN
60 335-1:
• if in PVC boot, use at least H05 VV-F
• if in rubber boot, use at least H05 RR-F.
All the cables to be connected to the burner ter-
minal strip 8)(A) must be routed through the fair-
leads.
The fair leads and precut holes can be used in
various ways. One example is given below:
1 - Pg 13,5 Three-phase power supply
2 - Pg 11 Single-phase power supply
3 - Pg 11 Control device TL
4 - Pg 9 Control device TR
5 - Pg 9 Fitting hole for fair lead, if required
6 - Pg 11 Fitting hole for fair lead, if required
7 - Pg 13,5 Fitting hole for fair lead, if required
SCHEMA (B)
RL 70 - 100 - 130 Models electrical connection
three-phase 220/380V power supply.
Fuses and cables section layout (B), see table.
Cable section not indicated: 1.5 mm
Key to wiring layout (B)
h1 - 1st stage hourcounter
h2 - 2nd stage hourcounter
IN - Manual burner stop switch
MB - Terminal strip
S - Remote lock-out signal
TB - Burner ground (earth) connection
TL - Limit control device system:
This shuts down the burner when the boiler
temperature or pressure exceeds the set-
point value.
TR - High-low mode control device system:
This controls operating stages 1 and 2 and
is necessary only for two-stage operation.
TS - Safety control device system:
This operates when TL is faulty.
Important: the burner is factory set for two-stage
operation and it must therefore be connected to
the TR remove control device to command light
oil valve V2.
Alternatively, if single stage operation is re-
quired, instead of control device TR install a
jumper lead between terminal 11 and 12 of the
terminal strip.
LAYOUT (C)
Calibration of thermal cut-out 17)(A)p.3
This is required to avoid motor burn-out in the
event of a significant increase in power absorp-
tion caused by a missing phase.
• If the motor is star-powered, 380V, the cursor
should be positioned to "MIN".
• If the motor is delta-powered, 220V, the cursor
should be positioned to "MAX".
Even if the scale of the thermal cut-out does not
include rated motor absorption at 380V, protec-
tion is still ensured in any case.
NOTE
• Burners RL 70 - 100 - 130 leave the factory pre-
set for 380V power supply. If 220V power sup-
ply is used, change the motor connection from
star to delta and change the setting of the ther-
mal cutout as well.
• The supply to the auxiliary circuits must be 220-
230 V.
• The RL 70 - 100 - 130 burners have been type-
approved for intermittent operation. This
means they should compulsorily be stopped at
least once every 24 houres to enable the con-
trol box to perform checks of its own efficiency
at start-up. Burner halts are normally provided
for automatically by the boiler load control sys-
tem.
WARNING:
do not invert the neutral with the phase wire
in the electricity supply line.
2
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