ECO ULTRA Electric Boiler
Installation, Use and Care Manual
(Revision June 2017)
, Page
13.
3.6.7 Heating pump
A circulating pump (not included) is required for
the heating system to deliver heating fluid to the
different heating zones. Sizing of the pump is
base on the heating system configuration and is
done by the installator (heating technician,
plumber).
3.7 BOILER WIRING:
3.7.1 Main power supply
The electrical wiring and grounding must conform
to local codes or, in their absence, to the National
Electrical Code. Local codes have authority for
wiring and electric breaker sizing. It is the
electrical technician responsibility to insure that
the installation meets the applicable codes
requirements.
On installation where a 120 Vac power is required
for a heating pump and other outboard
components, main power supply to the ECO
ULTRA must be a 120/240 Vac, single phase, 60
Hz using 3 conductors (L1
– L2 – N) and a ground
wire.
On installation where no 120 volts external
components need to be powered by the ECO
ULTRA, Power supply could then be supplied
with only two conductors L1-L2 with a ground
wire.
Electrical current draw for the boiler being
installed is indicated on the boiler’s name plate.
The electrical technician needs this information in
order to determine the proper electrical breaker
and cable. The cable can be either aluminum or
copper, but must be adequate for 75°C operation.
If aluminum cables are used, it shall be of an
adequate size (generally bigger) and particular
consideration will have to be respected such as
the use of DE-OX inhibitors in order to meet the
National electrical code.
3.7.2 Heating pump wiring
If the building heating system is designed for a
single pump operation and the electrical power to
the boiler is 120/240 Vac 3 conductors and
ground type, the pump (1/6 HP max) can be
directly connected to the boiler electric panel “PP”
terminals. The boiler control will operate the
pump as soon as a heat demand is signalled by
the space thermostat.
3.7.3 Outdoor temperature sensor
If you want the boiler target temperature to
modulate according to the outdoor temperature
(when the outdoor temp. will get colder, the target
temperature will get higher). The supplied
outdoor sensor will have to be connected to S1
S1
before turning the power on
to the unit.
The installation of this sensor cancels the
operation of the boiler when the outdoor
temperature
exceeds
the
selected
value
corresponding to the maximum temperature
required for heating.
This control strategy optimize the use of the main
renewable energy source by reducing the use of
electric elements of the ECO ULTRA boiler.
1. Sensor location:
-Outside the building at a location which best
represents the heat demand of the building (a
wall facing north for most of the buildings and on
a south one on buildings with large windows
facing south).
-It should not be exposed to external heat
sources
(dryer
outlet,
window
openings,
uninsulated walls).
-It should not be installed in a location where it
could be covered with snow.
2. Installation:
-
Drill a 9/64” dia. hole through the wall and insert
the sensor cable.
-Fix the sensor cover to the wall using supplied
screw.
-With an electric cable (100ft max.) having 2
conductors 20ga. connect one end of this cable
to the sensor cable using twist-on wire
connectors and the other end to terminals S1 &
S1 of the boiler.
If you wish to operate the boiler at a fixed target
temperature, simply do not connect the sensor
before applying the power to the unit (do not put
a jumper between S1&S1 if the outdoor sensor is
not used).
3.7.4 Room thermostat wiring
3.7.4.1 Single heating zone
Using a two (2) wires central thermostat, connect
the low-voltage thermostat dry contact to the W
and R terminals on the ECO ULTRA electrical
panel.
Using a three (3) wires central thermostat,
connect the C, W and R terminals to the boiler
electric panel corresponding terminals.
