Installation
21
20154169
GB
4.10.2 Supply cables and external connections
passage
All the cables to be connected to the burner are fed through the
holes of the right and left plates after unscrewing the screws 8) and
opening the pre-trimmed hole (Fig. 19). The use of the cable grom-
mets can take various forms. By way of example we indicate the
following mode (according to
UL795
):
1
three phase power supply with
3
/
8
inch cable grommet
2
Available: single phase power supply and other devices
3
Available: consents/safety, minimum gas pressure switch, gas
valves, pilot valves and other devices
All holes have a
3
/
8
inch dimension.
4.11
Calibration of the thermal relay
The thermal relay (Fig. 20) serves to avoid damage to the motor
due to an excessive absorption increase or if a phase is missing.
For calibration 2), refer to the table indicated in the electrical layout
(electrical wiring in charge of the installer).
To reset, in case of an intervention of the thermal relay, press but-
ton “RESET” 1).
The button “STOP” 3) opens the NC contact (95-96) and stops the
motor.
Insert a screwdriver in the window “TEST/TRIP” 4) and move it in
the arrow direction (to the right) to carry out the thermal relay test.
WARNING
The control panel is in compliance with UL508A.
3
2
1
1
2
3
8
8
8
8
Fig. 19
20183587
After carrying out maintenance, cleaning or check-
ing operations, reassemble the hood and all the
safety and protection devices of the burner.
WARNING
The automatic reset can be dangerous.
This operation is not foreseen in the burner oper-
ation.
1
2
3
MAN
AUT
O
STOP
NO
98
97
96
95
RESET
NC
4
TEST/TRIP
D8685
Fig. 20
Summary of Contents for RS 28/M
Page 2: ...Original instructions...
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