30
Instructions for the installer
3.21 -
ELECTRICAL CONNECTIONS
Regulations in force
The electrical connections to the boiler must be made in ac-
cordance with all applicable
local codes and the latest revision of the NFPA 70: National
Electrical Code
Installations should also conform with C22.1 - Canadian
electrical code, part I (21st edition), safety standard for electri-
cal installations if installed in Canada.
CAUTION
The boiler must be electrically grounded in ac-
cordance with local codes, or in absence of lo-
cal codes, with the National Electrical Code,
NFPA 70: National Electrical Code C22.1- Ca-
nadian electrical code, part I (21st edition), sa-
fety standard for electrical installations
The gas, D.H.W. and the CH system pipes can-
not be used as ground plates.
Ensure that the above safety electrical requirements subsist;
in case of doubt, ask for a professionally qualified technician
to check the appliance’s electrical system.
LATTNER refuses responsibility for any damages arising from
failure to earth the boiler correctly.
It is necessary that a qualified technician verifies that the
electrical system is adequate to the appliance’s maximum
absorbed power, indicated on the data plate, verifying in
particular that the section of the system’s cables is suitable
to the appliance’s maximum absorbed power.
CAUTION
For the appliance’s general electrical supply the
use of adaptors, multiple sockets and/or
extension cords is strictly forbidden.
The use of any power supplied equipment
implies the observance of several fundamental
rules, such as:
-
Do not touch the appliance with any wet part of your body
and/or barefooted;
-
Do not pull the supply cables
-
Do not expose the boiler to sunlight, rain, etc., unless it is
explicitly foreseen;
-
Do not permit children or inexpert people to use the
appliance.
Mains electrical supply connection
120 V - 60 Hz
Power supply cord
The boiler is provided complete with a power supply cord
59‘‘ (1,5 m) long and with a cross section area of 3 x 16 AWG
The electric connections of the boiler are shown in the section
named “ACTUAL WIRING DIAGRAM” (paragraph 3.22)
WARNING!
We remind you that upstream of the electrical
connection, it will be necessary to foresee a
service relay (NOT SUPPLIED) which, when
the additional electrical safety devices (if
any) intervene, shuts down the electrical
supply to the on-off fuel valve fitted on the
gas supply circuit, but not to the boiler so as
to guarantee the running of the pump and
permit the boiler to cool down.
DANGER!
The electrical connections must be carried
out only by a qualified engineer.
Before carrying out the connections or any
other operation on the electrical parts,
always switch off and disconnect the
electricity supply and ensure yourself that it
cannot be accidentally turned on.
It is necessary to fit a double pole switch on
the electrical supply line, having a contact
separation in both poles, in an easy accessible
position in order to make quick and safe the
servicing operations.
FASTON BLOCKING
If necessary the faston can be disconnected by
slightly folding up, with a point, the blocking
tongue ‘’ Á. ‘’.
A
CAUTION
External connection board connections
WARNING
Danger of fatal accident due to electric shock.
120 VAC connections may be present on the
external connection board when power is sup-
plied to the boiler.
- No changes may be made to the wiring of the
boiler.
- All connections should be designed in accor
dance with the applicable regulations.
- Label all wires prior to disconnection when
servicing controls. Wiring errors can cause im
proper and dangerous operation.
- Verify proper operation after operation servi
cing.
