Thermo-Serv 9901i - Manual (Page 13)

Changing INSTALLER Settings
The INSTALLER SETTINGS are selected based on the type of equipment you have in your facility. This feature should be set only by
a certified HVAC technician. Changing these settings could result in higher energy costs and may even damage the equipment. You
should only change the FILTER MONITOR length should you get a new type of filter.
Energy Efficient Recovery™ (EER™)
Energy Efficient Recovery™ is an energy saving feature. During a set back period (or set up in cooling), it allows the thermostat to
look up to two hours ahead to determine when to turn on the heating (cooling) system. During this time period, the second stage is
locked out to allow the first (and most efficient stage) to bring your facility to the desired temperature.
Indoor Sensor
The remote indoor sensor (part #9020i) can be used to improve the comfort of your home. When used in conjunction with the local
sensor on the thermostat, the two sensors average the sensed temperature and control to that average temperature.
You also can use the remote sensor in a stand-alone situation when you want to control the temperature in a remote area but have the
thermostat in a secure location.
Outdoor Sensor
The remote outdoor sensor (part #9025i) can be used to aid in the comfort of your facility or simply as a sensing device to inquire
about outdoor conditions. In most applications, the thermostat will have a display of the temperature sensed by the remote outdoor
sensor. With a heat pump system, the remote outdoor sensor can help determine when to turn on the second stage of heating for opti-
mal comfort. The remote outdoor sensor should be installed on the northern wall of the facility, away from direct sunlight or other heat
sources that may affect its sensitivity.
25
SERVICE MONITOR MENU
Two menus are available for the 9920i, the Service Monitor and the Filter Monitor. Three menus are
available for the 9901i and the 9915i, the Cool Monitor, the Heat Monitor and the Filter Monitor. All
can be set based on the HVAC system run time or the calendar. See Reminder Interval.
All selections can be set from OFF to 360 days in 30 day increments or OFF to 980 in 20 hour increments.
REMINDER INTERVAL
The Reminder Interval can be set for either HVAC system run time or based on the calendar.
If Run Time is chosen, the service reminder will be set in hours. After the HVAC system has been
operating for the selected number of hours, a Service Reminder will be displayed informing you that
service is suggested for your system.
If Calendar Time is chosen, the service reminders will be set in days. After the selected number of
days has passed, a Service Reminder will be displayed informing you that service is suggested for
your system.
TEMPERATURE OFFSET
The last unique feature is the OFFSET or calibration feature. This allows the installer to recalibrate
the thermostat if the displayed room temperature is not the actual room temperature. The OFFSET
feature also allows you to display a temperature that is different from the actual room temperature.
SHORT CYCLE PROTECTION
You can change or remove the timed delay that protects the compressor in an air conditioner or
heat pump system. Short Cycle Protection should be turned off ONLY if the HVAC system has other
protective circuits that guarantee a compressor off time. This feature is adjustable from OFF to 5
minutes in 1-minute increments.
24
INSTALL MENU SELECT
SERVICE MONITOR MENU
COOL MONITOR 980
HEAT MONITOR 980
FILTER MONITOR 980
INSTALL MENU SELECT
REMINDER PERIOD
RUN TIME
CALENDAR TIME
INSTALL MENU SELECT
TEMPERATURE OFFSET
+3.0 ˚F
INSTALL MENU SELECT
SHORT CYCLE
PROTECTION
4 MINUTES