Your new digital thermostat has been designed to
provide accurate control and display of room temper-
ature. In addition, it also will display all relevant infor-
mation pertaining to your system.
USER CONTROLS
INSTALLER NOTES
MODE
8531
The thermostat is a heat only control and is perma-
nently in the heat mode.
Heat Only Thermostat
OPERATING INSTRUCTIONS
The clearly marked buttons and informative display
make it extremely easy to understand and simple to
use.
HEATING ꢀ
Select the temperature you want your equipment to
maintain while in the heating mode by pressing either
the ✞ or ✟ buttons.
Please take a few moments to read the brief instruc-
tions and familiarize yourself with the various func-
tions in order to obtain maximum benefit from this
truly unique electronic control.
CELSIUS / FAHRENHEIT
Simultaneously press ✞ and ✟ to switch between
Celsius and Fahrenheit temperature display.
GENERAL INFORMATION
LIMITED OVERRIDE
The thermostat normally displays room temperature,
mode of operation and whether heating is currently
on. The two buttons on the front of the unit allow
complete control of the equipment.
When the keyboard is locked (switch #2 ON), the user
may override the temperature setpoint for 1 hour by
pressing either the ✞ or ✟ buttons. The range of tem-
perature override is ±3°F or ±3°C from the pro-
grammed daytime setpoint.
Raising or lowering the setpoints in heating is as sim-
ple as pushing a button. In addition, you may choose
to display the temperature in °F or °C.
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SEE REVERSE FOR INSTALLATION INSTRUCTIONS
ELECTRONIC THERMOSTAT
TWO YEAR LIMITED WARRANTY
POWER FAILURES
INSTALLER NOTES
Your Research Products Corporation Aprilaire™ Thermostat unit is
expressly warranted for two (2) years from the date of installation to be
free from defects.
Research Products Corporation’s exclusive obligation under this war-
ranty shall be to supply, without charge, a replacement for any thermo-
stat which is found to be defective within a two (2) year period and
which is returned no later than thirty (30) days after said two (2) year
period by you to either your original supplier or to Research Products
Corporation, Madison, Wisconsin, 53701, together with the model num-
ber, manufacturing code number and installation date of the thermostat.
THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPO-
RATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN
WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CON-
TRASTED TO DEFECTS IN THE THERMOSTAT ITSELF.
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTIC-
ULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID TWO
(2) YEAR PERIOD. RESEARCH PRODUCTS CORPORATION’S LIABILITY FOR
INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES FOR
PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAID
IMPLIED WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY
EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S) RESULT FROM
FAILURE TO HAVE THIS UNIT INSTALLED BY A QUALIFIED HEATING AND
AIR CONDITIONING CONTRACTOR. IF THE LIMITED WARRANTY IS VOID
DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR, ALL DISCLAIMERS
OF IMPLIED WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION.
Some states do not allow limitations on how long an implied warranty
Your thermostat employs the latest developments in
solid state electronic technology.
One of the unique features of your thermostat is that
no battery is required to maintain your selected set-
points in the event of a power loss as the memory is
unaffected by power failures of any duration.
When power is restored, the thermostat will continue
operating as if the power had never been off.
TEMPERATURE ACCURACY
Full temperature accuracy will be realized only after
the thermostat has been installed and powered for at
least one hour.
lasts or the exclusion or limitation of incidental or consequential dam-
ages so the above exclusion or limitations may not apply to you.
This warranty gives you specific legal rights and you may also have
other rights which vary from state to state.
This equipment if installed in strict accordance with the manufacturers
instructions,complies with the limits for a Class B computing device
pursuant to Subpart J of Part 15 of FCC rules.
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Model 8531
111-137B
97185
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