Leviton omnistat 3 Directives D'installation page 14

Heat Pump (2 Stage Heat / 1 Stage Cool) - Continued
POWER UP
1. Double check wiring, be sure that there are no stray wires or wire strands at the
connections.
2. Connect power to the transformer and system. The display will show all of the
temperature reading.
3. Press [FAN]. The fan icon should display in the lower left-hand corner of the display
and the system fan should come on.
4. Press [FAN] again. The thermostat will turn off, as evidenced by a power icon
appearing in the lower left-hand corner, no temperature displayed, and the fan
stopping.
5. Press [FAN] a third time. The thermostat will turn on, restoring the temperature display
and setting the fan to automatic mode (engage when an appropriate heating or cooling
call is made).
6. Test the "Heat" mode by performing the following steps:
a. Tap the "-" or "+" button one time – this will bring up the raise/lower setpoint, as
well as a " flame" or "snowflake" icon below the setpoint.
b. Tap the Fan button as necessary, to change the icon below the setpoint to "
flame" (Heat mode).
c. Use the "+" button to raise the desired heat setpoint 1 degree above the current
temperature - the heating unit should come on. NOTE: Ensure that the heating
system is actually heating.
d. After approximately 2-3 minutes, raise the heat setpoint to 3 degrees above the
current temperature – the second stage of heat will engage.
e. Use the "-" button to lower the heat setpoint back below the current temperature.
Ensure that the heating unit goes off.
7. Test the "Cool" mode by performing the following steps:
a. Tap the "-" or "+" button one time – this will bring up the raise/lower setpoint, as
well as a " flame" or "snowflake" icon below the setpoint.
b. Tap the Fan button as necessary, to change the icon below the setpoint to
"snowflake" (Cool mode).
c. Use the "-" button to lower the desired cool setpoint 1 degree below the current
temperature - the cooling unit should come on.
d. After approximately 2-3 minutes, lower the cool setpoint to 3 degrees below the
current temperature – the second stage of cool will engage.
e. Use the "+" button to raise the cool setpoint back above the current temperature.
Ensure that the cooling unit goes off.
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