13
3.22 - Electrical
connections
3.22.1 - Overview
If installing an external
electrical source, the appliance
must be electrically grounded in
accordance with local codes or,
in the absence of local codes,
with the
National Electrical
Code
,
ANSI/NFPA 70
and/or the
CSA C22.1, Electrical code
The heater must be connected to
a 115V 60Hz, single phase
electrical supply fused to 15 amps,
An electrical junction box (see
figures 6, 7, 8) is provided for
connections for both the line
voltage of 115V 60 Hz..
CAUTION!!! Label all
wires prior to disconnection
when servicing controls. Wiring
errors can cause improper and
dangerous operation.
Verify proper operation after
servicing.
CAUTION!!!
The electrical
safety of the heater is assured only
when it has been correctly
connected to an efficient grounding
system constructed in compliance
with the safety regulations in effect.
This is an essential safety
requirement that must be verified. In
case of doubt, have the electrical
system thoroughly checked by a
qualified technician;
CAUTION!!!
If the heater is
not correctly connected to a
grounding system, it will continually
go into the lock-out state.
Have a qualified technician check
that the electrical system is
adequate for the electrical power,
indicated on the rating plate,
required by the heater.
The heater must be hooked up to
the electrical supply by means of a
fixed connection, (not with a
removable plug), the use of
adapters, multiple sockets or
extensions is not permitted.
Provide the installation of a main
emergency switch immediately
upstream from the heater.
3 - INSTALLATION
Maintain the correct polarity
between live and neutral when
connecting the heater.
Ensure that the water and heating
system pipes are not used as
ground plates for the electrical or
telephone system.
These pipes are not suitable for this
purpose, and in addition this could
rapidly lead to serious corrosion
damage to the heater, pipes and
radiators.
The heater is not provided with any
protection against lightening
strikes.
3.22.2 - Choosing
the room
thermostat
The heater is designed to function
with any type of room thermostat or
programmable thermostat provided
with contacts for connecting the
heater cables, having the following
characteristics:
- close = call for heating;
- open = don’t call for heating
- not electrically supplied;
- minimum electrical characteristics
24 Vac, 2.5A
3.22.3 - Connecting
the room
thermostat
The room thermostat must always
be located in a point of the house
where the temperature is not
subject to sudden changes.
To connect the wires of the room
thermostat, proceed as follows
(refer to figures 6, 7 and 8):
use a two-core wire with a
minimum cross section of 18
AWG;
remove the heater front cover
panel following the instructions
given in chapter 3.28;
back off the three screws “B”
(see fig. 6) from box “A”;
open the door “A” (see fig. 6);
choose a free cable clamp “C”
(see figure 8) that is not used by
other conductors;
unscrew “D” screws (see fig. 8)
of the cable clamp “C” and pass
the cable inside;
connect the two ends of the
cable to terminals 7 and 8;
connect the cable, using a
screwdriver to press down on the
terminal block levers as shown in
figure 8.
