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Figure 7 : 2-stage heating & 1-stage air conditioning &
heat pump thermostat
Figure 8 : 2-stage heating & 2-stage air conditioning &
heat pump thermostat + dehumidification mode
2.5.1. Thermostat heat anticipator adjustment
Certain thermostats are equipped with a heat anticipator that
must be adjusted according to the instructions supplied.
This is to ensure that the heating mode is comfortable and
economical.
Generally speaking, on a single stage thermostat, a reading
of the current must be taken with an ammeter as follows:
1.
Move the anticipator to its highest setting, rendering it
ineffective.
2.
Remove the wire from the "W1" terminal and connect an
ammeter between the terminal and the wire.
3.
Call for heat by raising the set point on the thermostat
and allow the furnace to run for 3 to 4 minutes to reach
its peak output.
4.
Once the current has stabilized, a reading should be
taken and the anticipator adjusted to that value.
longer heating cycles are desired, the anticipator can be
set to a higher value
2.5.2.
Ducts and filters
The ducts must be sized such a way as 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:
1.
Use two elbows between each outlet and the supply and
return air plenum;
2.
Cover the vertical sections of the supply and return air
duct with soundproofing material;
3.
Use baffles in short radius elbows;
4.
Use flexible hangers to suspend the ducts.
The SUPREME 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 of the installation has been determined, use the
four square knockouts for ease of cutting the opening.
A heat pump or an air conditioner can be added to this
furnace, in either the supply or return air duct. Carefully
follow the instructions provided with these appliances to
ensure proper installation and hook-up to the electric
furnace. Refrigerant and drainage pipes must in no way
hinder access to the furnace panels.
2.6
SUPPLY AIR ADJUSTMENTS AND OTHER
BLOWER SETTINGS
Fan Control Board taps are used by the installer to configure
a system. The ECM motor uses the selected taps to modify
its operation to a pre-programmed table of airflows (Refer to
Table 3 and Table 4). Airflows are based on system size or
mode of operation and those airflows are modified in
response to thermostat inputs.
SUP electric furnace must be configured to operate properly
with system components with which it is installed.
successfully configure a basic system (see information
printed on circuit board label located next to select pins),
move the 6 select wires to the pins which match the
components used. (Refer to Figure 9 below)
Figure 9 : Fan Control Board
If
2.6.1.
HEAT KW/CFM adjustment
Installer must verify (factory set) the electric heat airflow
adjustment required for kW size heater installed.
The select pins are marked 23, 20, 18, 15 (for ½ HP ECM
motor unit) and 27, 23, 20, 18 (for 1.0 HP ECM motor unit).
Refer to the unit wiring diagram and select the pin for the
heater size being used (Refer to Figures 9 and 15).
The airflow must be large enough for safe and continuous
operation. (Refer to Table 3 and 4 for airflow delivery CFM).
6
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