Thermo-Serv 9901i - Manual (Page 12)

INSTALLER settings (continued)
ENERGY EFFICIENT RECOVERY
When turned on, the thermostat will look up to two hours before the next event and anticipate when
to turn on to reach the desired temperature.
DEADBAND SETPOINT
Deadband is used with the AUTO CHANGEOVER feature. The deadband is the temperature
difference from the setpoint temperature during which the heating or cooling will not be turned on.
This is adjustable from 2-8°F (1.0-4°C).
SECURITY CODE
Enter a code to prevent changes to the INSTALLER settings.
CONTACT INFORMATION
This allows the servicing HVAC contractor to put their name and phone number into the thermostat
to remind you when service may be required.
23
INSTALL MENU SELECT
ENTER SECURITY CODE
FOR INSTALLER
SETTINGS
0 0 0 0
INSTALL MENU SELECT
ENERGY EFFICIENT
RECOVERY
DISABLE
ENABLE
INSTALL MENU SELECT
AUTOCHANGE DEADBAND
3 ˚F
INSTALLER settings (continued)
AUXILIARY HEAT
The 9920i can be set to use your 2H/2C heat pump internal auxiliary heating or to use an exter-
nal add-on source. The add-on feature will be used most often when a single stage heat pump
uses a gas or electric furnace as its second stage of heating.
RESIDUAL COOL
In order to get greater efficiency from the cooling system, the fan can be programmed to run for
0 (OFF), 30, 60, 90, or 120 seconds after the air conditioner has shut off.
BALANCE POINTS
This screen will appear only when the optional outdoor sensor 9025i is connected to the
thermostat. When this sensor is used with the 9920i, you can set the lower temperature (below
which the heat pump will not run) and upper temperature (above which the 2 nd stage heat will not
run). This promotes efficient operation of the heating system.
AUTO CHANGEOVER
When turned on, the thermostat will switch automatically between heating and cooling to maintain
the optimal temperature in your home.
22
INSTALL MENU SELECT
AUTO CHANGEOVER
DISABLE
ENABLE
INSTALL MENU SELECT
AUXILIARY HEAT
STANDARD - COMP. =ON
ADD ON - COMP. =OFF
INSTALL MENU SELECT
RESIDUAL COOL
SECONDS DELAY
60
INSTALL MENU SELECT
BALANCE POINTS
LOW BALANCE 45 ˚F
HIGH BALANCE 95 ˚F
BACK EDIT
CONTACT INFORMATION
AIR EXPERTS
1-555-555-1212