RBI Boiler, Installation And Operation Instructions Manual

Page: 53 / 154

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Figure 10-1 Junction box
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 Figures 10-
1, 10-4 or 10-5:
1. remove the heater casing following the
instructions given in Section 15.2 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 - Room Thermostat
wiring (IB Boiler only)
Install the room thermostat in a part of
the house where the temperature is as
near to average as possible. Avoid areas
subject to sudden temperature changes
such as outside windows or doors, above
radiation elements, near lamps, etc.,
(see Figure 10-2).
Connect the room thermostat to the
boiler by following the steps below:
1. remove the boiler casing according to
10 - INSTALLATION - Electrical connections
the instructions given in Section 15.2
and open the junction box cover;
2. use a two conductor cable with a
minimum cross section of #18 AWG
between the boiler and the room
thermostat;
3. connect the cable leads to the “10”
and “11” terminals as shown in Figure
10-4.
NOTICE!
the maximum room thermostat
cable length permitted is 32 ft (10 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 run through
conduits containing 120Vac
power wires or an electrical
shock hazard will exist.
10.1.3 - Installing the
outdoor temperature
sensor (IB Boiler only)
The outdoor temperature sensor is
supplied with the boiler. 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 fl oor. 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.
Connect the outdoor temperature sensor
to the boiler to terminals “14” and “15”
(See fi gure 10-4):
1. 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 32 ft (10 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 run through conduits
containing 120 Vac power wires
or an electrical shock hazard will
exist.
2. 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:
1. Gain access to the installers’ menu
(see Section 14.14);
2. Set parameter 2003 to 1
A = Cable conduit
B = Line (Hot) cable
C = Neutral cable
D = Ground cable