5
2.4- ELECTRICAL SYSTEM
The S
UPREME
furnace is completely pre-wired and all field wiring
must be connected to the terminal blocks on the unit. It requires
a 120/240 - 208 volt.
WARNING
R
ISK OF FIRE
The conductor sizing must conform to the last edition of the
local or national codes.
Failure to follow this rule can result in death, bodily injury
and/or property damage.
Power supply to the unit can be done using copper or aluminum
wires. The wire size must be decided in accordance to the unit
power consumption, the over current protection type and
capacity, the wire type and length, and the environment where
the unit is installed. If an aluminum wire is used, other
precautions must be taken to insure the conformity of the
installation. In all cases, all the factors affecting the wire gauge
must be considered and the installation codes followed.
The exterior of the unit must have an uninterrupted ground to
minimize the risk of bodily harm. A ground terminal is supplied
with the control box for that purpose. A connector is supplied on
the ground terminal to ground an added accessory.
In the event that wires inside the unit require replacement, these
must be copper wires only with same temperature rating and
sizes as originals.
2.4.1- Conversion from two to one supply wires for model
over 27kW
WARNING
When using one terminal block on models of 27kW and
higher, the installation must be performed with copper wire
ONLY in order to comply with the Canadian electrical code.
The usage of an aluminum or copper wire is acceptable on
models 25kW and lower.
Move all wires from the two pole terminal to the three pole
terminal following the corresponding colors as shown in Figure
4.
The breaker and the supply conductors must be sized by adding
the ampacities of the two terminals indicated on the nameplate.
Refer to the electrical diagram Figure 11.
Figure 4 : Conversion from two to one supply wires
Before
After
2.5- INSTALLATION OF THE THERMOSTAT
2.5.1- Communicating thermostat with Alizé system
The thermostat must be connected to terminals 1, 2, R and C of
the furnace. The interface board must be installed as specified
in the supplied manual and connected with the RJ11 wire also
supplied with the interface board.
Figure 5 : Communicating thermostat connection
2.5.2- Modulating thermostat
The thermostat must be connected to V/W2, C, R, G terminals
and optionally to Y1, Y2, O and DH terminals if the there are
options of cooling or heat pump.
Figure 6 : Modulating thermostat connection
2.5.3- Ducts and filters
The ducts must be sized to accommodate the specified airflow
and the available static pressure. Refer to the applicable local
and/or national installation codes.
Insulate the ducts that lead through non-heated areas. Use
flexible supply and return air connectors to avoid the
transmission of vibration. To make the unit run even quieter, the
installer should:
a. Use two elbows between each outlet and the supply and
return air plenum;
b. Cover the vertical sections of the supply and return air duct
with soundproofing material;
c.
Use baffles in short radius elbows;
d. Use flexible hangers to suspend the ducts.
The S
UPREME
furnace is equipped with a filter frame for the
blower compartment. It must be installed on the outside of one
of the three sides or the bottom of the furnace. Once the location
