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If after 2 hours the set point has not been
met, the Thermostat will shutdown the heat pump and
energize the auxiliary heat to meet the set point. This
option should also be used for installation where the
heat pump evaporator coil is downstream from the
source of auxiliary heat.
Furnace (Auxiliary Heat)
Allows you to enable and configure up to a 3-stage
conventional heat source. If you have selected Heat
pump as your primary source, this feature will allow
you to configure the auxiliary heat connected to the
system.
Furnace Type
Allows you to configure the type of furnace connected.
This allows the Smart Thermostat to optimize its
algorithms based on the type of fuel and typical
characteristics of the chosen system. Choose the
option that best represents the type of heating system
installed.
Heat Stages
Allows you to configure up to 3 stages of
heat. If you require a third stage, you must configure
an accessory relay to control that stage.
Heat Fan Control This option allows you to determine
if the system fan is controlled by the system during
heat cycles, or if the Thermostat is required to control
the fan. Normally the HVAC system controls the fan
during heat cycles.
Air Conditioner
Allows you to enable and configure up to 2 stages of
air conditioning. If you require a second stage, you
must configure an accessory relay to control that
stage.
Staging Method of Operation
The ecobee Smart Thermostat uses a unique method
for staging for multi-stage heating or cooling. It uses
a combination of intelligent algorithms and past
performance to determine when to activate the
stages.
When there is a call for heat or cool, the system
computes how long it would take for the system to
reach the desired set point in stage 1, stage 2 or
stage 3 accordingly. It will determine the highest stage
at which a minimum of 10 minutes of run time is
required. It will then automatically start the system at
that stage (ie if it calculates that it will take 15 minutes
at stage 2 but only 7 minutes at stage 3, the system
will immediately turn on stage 2 to meet the set point).
If the calculation indicates to start at stage 1, and it
takes more than 10 minutes to reach the set point,
it will automatically engage stage 2. If stage 2 runs for
more than 10 minute without reaching the set point it
will activate stage 3. A minimum run time of 10
minutes is used to ensure that proper circulation
throughout the system and that minimum cycle times
are maintained. For heat pumps with auxiliary heat,
the operation of the auxiliary heat will depend on the
configuration of the Allow Heat
Pump/Auxiliary Heat to Run Simultaneously
.
Accessory relays
Accessory relays are generic relays that can be
configured to control the following;
Heat Stage 3 Select this option when the Thermostat
is required to control a 3-stage conventional heating
system. Connect the third stage (or W3) contact to
this accessory relay.
