26
Figure 19 - Room thermostat location
route the cable through an empty
cable clamp in the junction box
connect the cable leads to the “RT”
terminals as shown in figure 18.
NOTICE! the maximum room
thermostat cable length permitted
is 65 ft (
20 m)
. For longer lengths,
up to 300ft (100 m) a shielded
cable, with the shield connected to
the ground, must be used.
WARNING!!! Since the room
thermostat wires conduct 24 Vac,
they must never be run through
conduits containing 120Vac power
wires or an electrical shock hazard
will exist
6.5 - Installing the
outdoor
temperature sensor
(optional)
Install the outdoor temperature sensor,
on an exterior wall of the building
facing NORTH or NORTH-EAST, at a
height of between 4 ft (1.2 m) and 6 ft
(1.8 m) from the ground level. On multi
story buildings, install the sensor near
the upper half of the second floor. Do
not install the sensor above doors,
windows or ventilation outlets nor
directly under balconies or gutter
pipes. Do not shield the outdoor
temperature sensor. Do not install the
sensor on walls without overhangs, or
not protected from rain. To connect the
outdoor temperature sensor to the
boiler proceed as follows:
remove the boiler casing according
to the instructions given in section
13.2 or 13.3 and open the junction
box per section 6.2;
use a two conductor cable with a
minimum cross section of # 18
AWG. between the boiler and the
outdoor temperature sensor.
NOTICE! the maximum outdoor
temperature sensor cable length
permitted is 65 ft (20 m). For longer
lengths, up to 300 ft (100 m) a
shielded cable, with the shield
connected to the ground, must be
used;
WARNING!!! Since the outdoor
temperature sensor wires conduct
24 Vac, they must never be run
through conduits containing 120
Vac power wires or an electrical
shock hazard will exist.
connect the outdoor temperature
sensor cable leads to terminals OS
as shown in figure 18;
connect the outdoor temperature
sensor cable leads to the ends of
the external temperature sensor.
Set the boiler so that it detects the
outdoor temperature sensor, as
follows:
press down the
button for 12
seconds until the display starts
blinking and shows
;
then press and release the
button several times until the
following
parameter appears;
using the
and
keys,
change the parameter value from 00
to 01 or 02 in relation to the type of
climatic heat adjustment desired as
explained in section 12.4;
press the
button repeatedly
until exiting the menu; the display
will no longer flash.
6.6 - Wiring the
circulator pump for
45AN and 45AE
models
Install the circulator pump as per figure
17 item “6”. Wire the pump to the
boiler following the steps below while
refering to figure 18:
remove the boiler casing according
to the instructions given in section
13.2 or 13.3 and open the junction
box per section 6.2;
use a three wire cable with a
minimum cross section of # 18
AWG between the boiler and the
circulator pump;
route the circulator cable through an
empty cable clamp in the junction
box;
connect the Line and Neutral cable
wires respectively to the “4 and 5”
terminals in the junction box;
connect the Ground wire to an
empty “Ground” connection inside
the junction box.
NOTICE! If the 120 volt power wires
are inverted, the boiler will lock-
out, displaying error code L05.
6.7 - Alarm output
Inside the electrical box (see 13.16
and 13.17) there is an electrical
connection for a 120Vac output that is
energized each time the boiler goes
into a lock-out or error condition. The
Installer can use this output to activate
any kind of external signalization
devices such an audible alarm, phone,
or other devices.
6 - INSTALLATION - Electrical connections
Summary of Contents for ONEX
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