20
ENG
FR
2.9 ELECTRICAL CONNECTION
The boiler must be electrically bonded to
ground in accordance with the require-
ments of the Authority having jurisdiction
or, in the absence of such requirements,
with the National Electrical Code,
ANSI/NFPA 70 and or the Canadian Elec-
trical Code Part I, CSA C22.1, Electrical
Code. If you must replace the electric
power cable supplied with the boiler, order
it exclusively from Sime.
The power supply must be single-phase
120 V-60 Hz througth a main switch pro-
tected by a fuse with a distance of a least 3
mm (0.118 inch) between contacts.
NOTE: The boiler must be connected with
an efficient grounding system. SIME shall
not be held liable for injury or damage
resulting from failure to ground the boi-
ler.
2.9.1 Electrical panel (fig. 12)
Before performing any kind of operation,
disconnect the unit by unpluging the
power cord.
Placing the boiler selector in position
“OFF” does not disconnect the electric
board from the power supply.
Caution: Label all wires prior to discon-
necting wires when servicing control.
Wiring errors can cause improper and
dangerous operation.
After connecting all wires, verify proper
operation after servicing.
Remove the three screws (9) locking the
control panel in place and pull the panel
forward until it can be tilted downward.
To access the components of the electrical
panel, unscrew the four screws holding the
protective guard in place (6).
2.9.2 Room stat connection (fig. 12)
To gain access to connector “TA”, remove
the control panel cover (7) and connect the
room stat to the terminals 15-16 after
having removed the jumper.
The thermostat or timer-thermostat,
recommended for better room tempera-
ture control, must be dry contact.
Figure 12
KEY
1 Tridicator
2 Time programmer seet (optional cod. 8092214)
4 Main PCB
5 Earth ground
6 Control panel protection
7 Cover (TA)
8 Connector (TA)
9 Fixing screw
ATTENTION: After having removed
the three screws, slide the panel
outward to tilt it downward
.
IMPORTANT: Before perfor-
ming any kind of operation,
disconnect the unit from the
power supply using the bipo-
lar switch of the plant. Placing
the boiler selector in position
“OFF” does not disconnect the
electric board from the power
supply.
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