Aprilaire 8539 installation instructions General Information, Power Failures, User Controls

8539

Single Setpoint Heating & Cooling

Auto Changeover with Reversing Valve

OPERATING INSTRUCTIONS

111-172B

SEE REVERSE FOR INSTALLATION INSTRUCTIONS

USER CONTROLS (Cont’d)

HEAT & COOL INDICATION ON DISPLAY

When the equipment is off, both flame and snowflake are on steadily. When the thermostat is calling for heat, the flame flickers and the snowflake goes off. When cooling, the snowflake flickers and the flame goes off.

LIMITED OVERRIDE

When the keyboard is locked (DIP switch #2 ON), the user may override the temperature setpoint for 1 hour by pressing either the ✞ or ✟ button. The range of temperature override is ±6°F or ±3°C from the programmed daytime setpoint.

Your new digital thermostat has been designed to	The model 8539 is a single-setpoint heat/cool ther-			USER CONTROLS (Cont’d)
provide accurate control and display of room temper-	mostat. It features a narrow, fixed deadband between
ature. In addition, it also will display all relevant infor-	internal heat and cool setpoints.			FAN $
mation pertaining to your system.				The fan will come on automatically when the system
The clearly marked buttons and informative display		USER CONTROLS		is operating, but there is no indication of this on the
				display. To select continuous fan operation, press
make it extremely easy to understand and simple to	COOLER
				the FAN button and the display will show $. This
use.
	To lower the temperature in the zone, press and hold			is recommended for electronic air cleaners or con-
Please take a few moments to read the brief instruc-	the ✞ button until the desired temperature is dis-			tinuous ventilation requirements.
tions and familiarize yourself with the various func-	played, then release.			NOTE: For fan coil applications in which the O and
tions in order to obtain maximum benefit from this
				B output terminals control valve position, DO NOT
truly unique electronic control.	WARMER
GENERAL INFORMATION				use continuous fan.
	To raise the temperature in the zone, press and hold
The thermostat normally displays room temperature,	the ✟ button until the desired temperature is dis-			REMOTE SENSOR (OPTION)
mode of operation and whether cooling or heating is	played, then release.
				RS1 – RS2 – RS+V
currently on. The two buttons on the front of the unit
				The thermostat is designed to accept the electronic
allow complete control of the equipment.	The number that is displayed when the button is
				remote sensor, which will allow you to locate your
Raising or lowering the setpoint is as simple as push-	released is the new setpoint or control temperature
				thermostat in an area away from view. Indoor and
ing a button. In addition, you may choose to display	for the zone. The display will return to the normal			outdoor sensors are available separately.
the temperature in °F or °C.	room temperature display after a few seconds.
The thermostat also allows you to select continuous	CELSIUS/FAHRENHEIT
fan operation (useful when using an air cleaner) or
	Simultaneously press ✞ and ✟ to switch between
have the fan come on with the equipment.
	Celsius and Fahrenheit temperature display.
				ELECTRONIC PROGRAMMABLE THERMOSTAT
POWER FAILURES		NOTES
				TWO YEAR LIMITED WARRANTY
				Your Research Products Corporation Aprilaire® Thermostat unit is
Your thermostat employs the latest developments in				expressly warranted for two (2) years from the date of installation to be
				free from defects.
solid state electronic technology.
				Research Products Corporation’s exclusive obligation under this war-
				ranty shall be to supply, without charge, a replacement for any thermo-
One of the unique features of your thermostat is that				stat which is found to be defective within a two (2) year period and
no battery is required to maintain your selected set-				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
points in the event of a power loss as the memory is
				Corporation, Madison, Wisconsin, 53701, together with the model num-
unaffected by power failures of any duration.				ber, manufacturing code number and installation date of the thermostat.
				THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPO-
When power is restored, the thermostat will continue				RATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN
				WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CON-
operating as if the power had never been off.				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
TEMPERATURE ACCURACY				(2) YEAR PERIOD. RESEARCH PRODUCTS CORPORATION’S LIABILITY FOR
				INCIDENTAL OR CONSEQUENTIAL DAMAGES, OTHER THAN DAMAGES FOR
Full temperature accuracy will be realized only after
				PERSONAL INJURIES, RESULTING FROM ANY BREACH OF THE AFORESAID
the thermostat has been installed and powered for				IMPLIED WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY
				EXCLUDED. THIS LIMITED WARRANTY IS VOID IF DEFECT(S) RESULT FROM
at least one hour.
				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
				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 page intentionally left blank.		This equipment if installed in strict accordance with the manufacturers
				instructions,complies with the limits for a Class B computing device pur-
	Model 8539	111-172B	97185	suant to Subpart J of Part 15 of FCC rules.