8
ELECTRICAL SYSTEM
ELECTRICAL SYSTEM
as set up by the manu-
facturer
LAYOUT (A)
Burner RL 28 (single-phase)
LAYOUT (B)
Burner RL 38 (single-phase)
LAYOUT (C)
Burners RL 38 - 50 (three-phase)
• Models RL 38 three-phase and RL 50 leave
the factory preset for
400 V
power supply.
• If
230 V
power supply is used, change the mo-
tor connection from star to delta and change
the setting of the thermal cut-out as well.
Key to Layouts (A) - (B) - (C)
C
- Capacitor
CMV
- Motor contactor
FR
- Photocell
I1
- Switch:
burner off - on
I2
- Switch:
1st - 2nd stage operation
MV
- Fan motor
RMO88.53A2 - Control box
RT
- Thermal cut-out
TA
- Ignition transformer
TB
- Burner ground (earth) connec-
tion
V1
- 1st stage solenoid valve
V2
- 2nd stage solenoid valve
VS
- Safety solenoid valve
XP1
- Connector for STATUS
XP4
- 4 pole socket
XP5
- 5 pole socket
XP7
- 7 pole socket
NOTE
For remote-reset, connect a push-button switch
(NO) between terminal 4 and neutral of the con-
trol box (terminals 15, 16, 17 and 18).
RL 28
(A)
ELECTRICAL EQUIPMENT FACTORY-SET
RL 38 single-phase
ELECTRICAL EQUIPMENT FACTORY-SET
(B)
RL 38 three-phase - RL 50
ELECTRICAL EQUIPMENT FACTORY-SET
(C)
D3231
D3227
D3230