Field Wiring Diagram - Rls 28-38-50 With Burner Mounted Lfl - Riello RLS 28 Installation, Use And Maintenance Manual

Field Wiring Diagram
RLS 28 - 38 with burner mounted Siemens LFL control
(A)
Field Wiring Diagram
RLS 50 with burner mounted Siemens LFL control
(B)
(C)
ELECTRICAL CONNECTIONS
Use flexible cables according to local Regulations.
LAYOUT (A) - The RLS 28 - RLS 38 Models
LAYOUT (B) - The RLS 50 Model
Fuses and wire size layout (A) -(B), see table (C).
Wire size when not indicated: AWG18
Key to layouts (A) - (B)
H1 - Remote lock-out signal
H2 - Low fire signal
H3 - High signal
H4 - Power on signal
H5 - Permission ok
IN - Burner manual stop switch
PG - Low gas pressure switch
PS - Remote lock-out reset
MB - Burner terminal strip
OCR - High-low control.
If the burner is to be set up for single stage operation install
jumper between terminals T6 and T8.
RLS 28 - 38
120 V
F A T10
S AWG 14
RLS 50
208 -
460 V 575 V
230 V
T6 T6 T4
14 14 14
OC - Operating control.
HL - High limit
Y11 - Low fire gas valve
Y12 - High fire gas valve
Y10 - Safety gas valve
NOTES
The setting of thermal overload must correspond to the motor amper-
age on of the burner.
Model RLS 50 three-phase, leaves the factory preset for 460 V power
supply. If 208-230 V power supply is uùsed, change the fan motor
connection from star to delta and change the setting of the thermal
overload as well.
The RLS 28-38-50 burners have been type- approved for intermittent
operation. This means they should compulsorily be stopped at least
once every 24 hours to enable the flame safeguard to check its own
efficiency at start-up. Burner halts are normally provided for automat-
ically by the boiler load control system.
If this is not the case, a time switch should be fitted in series to IN to
provide for burner shut-down at least once every 24 hours.
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D2297
D2298