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10 - INSTALLATION - Electrical connections
10.1 - Electrical
connections:
overview
WARNING!!!
ELECTRICAL
SHOCK HAZARD Turn off
electrical power supply
before making any electrical
connections to avoid possible
electric shock hazard. Failure to
do so can cause severe personal
injury or death.
WARNING!!!
Label all wires
prior to disconnection when
servicing controls. Wiring errors
can cause improper and dangerous
operation, severe personal injury
or death. Be sure of a correct
functioning after the servicing.
ATTENTION!!!
Au moment
de l’entretien des commandes,
étiquetez tous les fils avant de les
débrancher. Des erreurs de câblage
peuvent entraîner un fonction-
nement inadéquat et dangereux.
S’assurer que l’appareil fonctionne
adéquatement une fois l’entretien
terminé.
WARNING!!!
The heater must
be electrically wired to ground in
accordance with the requirements of
the authority having jurisdiction or,
in the absence of such requirements,
with the
National Electrical Code,
ANSI/NFPA 70
and/or the
Canadian
Electrical Code Part I, CSA C22.1,
Electrical Code
.
CAUTION!!!
The heater is not
provided with any protection
against lightening strikes.
10.1.1 - Connecting the
power supply cable
Provide and install a fused disconnect or
service switch (15 amp recommended) as
required by the code.
To connect the electrical power supply
cable, follow the steps below while
referring to Figure 10-2:
1. remove the heater casing following the
instructions given in Section 17.2 and
open the junction box cover;
2. install the power supply wires, “B”
and “C” to terminals “101” and “102”.
connect the ground wire to the ground
terminal;
3. connect the 120 volt hot wire to
terminal “101”;
4. connect the 120 volt neutral wire to
terminal “102”.
NOTICE!
If the 120 volt power wires are
inverted, the heater will block, displaying
error code Err 65.
10.1.2 - Connection to a
LWCO device
CAUTION!!!
Use only LWCO
sensor device. To use water flow
switch ask engineering wiring
diagram to the manufacturer.
Install LWCO device as per engeneering
method. Connect LWCO terminals to
103 and 104 heater terminals.
WARNING!!!
Heater
terminals 103 and 104 containing
line voltage and electrical shock
hazard will exist.
10.1.3 - Alarm contact
Alarm contact works only in presence of
the 885 IF board (see figures 3-3, 3-6
item 16).
Alarm contact does not react
in case a dependent module (burner
2) is in error.
Figure 10-1 Junction box
A = Cable conduit
B = Line (Hot) cable
C = Neutral cable
D = Ground cable
NOTICE! Wiring must be N.E.C.
Class 1. Use only type 105°C wire or
equivalent.
Installation must comply with:
1. National Electrical Code and any other
national, state,provincial, or local codes,
or regulations.
2. In Canada, CSA C22.1 Canadian
Electrical Code Part 1, and any local
codes.
Check that the electrical system is
adequate for the power consumption
indicated on the rating plate or in
Section 18.
Line voltage field wiring of any
controls or other devices must
conform to the temperature limitation
of type T wire at 95 °F (
35 °C)
, above
room temperature. Use copper
conductors with a minimum size
of #14 AWG. Low voltage wiring
must not be less than #18 AWG
with a neoprene, thermoplastic or
other equivalent insulation having a
minimum insulation thickness of 0.012
in,
(0.3 mm)
.
A properly rated shut-off switch shall
be located nearest to the heater for
any maintenance use.
Ensure that the polarity between live
and neutral wires is maintained when
connecting the heater.
CAUTION!!!
Ensure that heating
and water piping is not used as a
ground connections for the electric
and telephone systems. This piping
is completely unsuitable for this
purpose and could rapidly lead to
serious corrosion damage to the
heater, piping and radiators.
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