White Rodgers 1F84-51 User's Manual
Contents
1. Z a M 70 riot m0 a te EMERGENCY HOLD _COOL Figure 6 Thermostat display buttons and switches temperature at the selected temperature until the next program period begins Then the thermostat will automati cally revert to the program HOLD TEMPERATURE The thermostat can hold any temperature within its range for an indefinite period without reverting to the programmed temperature Press HOLD TEMP ADV DAY button HOLD will be displayed Then choose the desired hold temperature by pressing H or f The thermostat will hold the room temperature at the selected setting until you press RUN PRGM button to start program operation again F C CONVERTIBILITY Press SET TIME SET TEMP and HOLD TEMP ADV DAY buttons until the temperature display is in Celsius C To display Fahrenheit F repeat the process TEMPERATURE DISPLAY ADJUSTMENT Your new thermostat has been accurately set in our factory However if you wish you may adjust your new thermostat tempera ture display to match your old thermostat This can be accomplished within a 4 range as follows 1 Press VIEW PRGM and HOLD TEMP ADV DAY buttons at the same time 2 Press H or E to adjust the displayed temperature to your desired setting 3 Press RUN PRGM to resume normal program operation COPY DAY FUNCTION This feature allows Monday s program to be copied into the rest of the week s program ming This feature is only available the f2. 2 3 and 4 However you may use the same heating and cooling temperatures for consecutive time periods Also keep in mind that for any given day you can only program one set of times for both heating and cooling for example if you select 5 00 AM to begin heating period 1 on Monday then your cooling period 1 for Monday will also begin at 5 00 AM However you may select different time periods for each day separately for example heating cooling period 1 on Monday may begin at 5 00 AM but heating cooling period 1 on Saturday may begin at 9 00 AM Use the table on the following page to plan your program time periods and the temperatures you want during each period You may also want to look at the sample program table to get an idea of how the thermostat can be programmed ENTERING YOUR PROGRAM Set Current Time and Day 1 Press SET TIME SET TEMP button once The display will show the hour only EXAMPLE tc ow 2 Press and hold either H or until you reach the correct hour and AM PM designation AM begins at midnight PM begins at noon 3 Press SET TIME SET TEMP once The display window will show the minutes only EXAMPLE Lunt 4 Press and hold either H or until you reach the correct minutes 5 Press SET TIME SET TEMP once The display will show the day of the week 6 Press H or N until you reach the current day of the week 7 Press RUN PRGM once The display will show the correct
3. of heating to be used The following wiring diagrams show typical terminal identifica Relay contacts shown are thermostatically operated tion and wiring For proper installation refer to the original manufacturer s instructions Thermostat Control Circuit FAN AUTO Heat ree THERMOSTAT SYSTEM SYSTEM Emergency MONITOR Relay SWITCH Aux Emer Relay Stage 2 Hot Changeover Relay is energized in COOL when O B switch is in the O position Neutral Changeover Relay is energized in HEAT when O B switch is in the B position TRANSFORMER Figure 3 Typical wiring diagram for single transformer systems If safety circuits are in only one of the systems remove the transformer of the system with NO safety circuits Thermostat Control Circuit CUR AND odan Set es a Ee et a Tee TAPE OFF SYSTEM Emergency Relay MONITOR SWITCH Aux Emer Relay Stage 2 Hot Neutral TWO COMMONS MUST TRANSFORMER Changeover Relay is energized in COOL when O B switch is in the O position BE JUMPERED TOGETHER Changeover Relay is energized in HEAT when O B switch is in the B position Figure 4 Typical wiring diagram for two transformer systems with NO safety circuits Polarity must be observed If the HOT side of FAN ON MALF the second transformer is jumpered to the Thermostat OA COMMON side of the first transformer a short FAN EAN
4. perature The cooling system should stop operating LOCKOUT BYPASS OPTION FOR QUALIFIED SERVICE TECHNICIANS USE ONLY OPERATORS SHOULD NOT USE THIS FEA TURE DUE TO POSSIBILITY OF EQUIPMENT OR PROPERTY DAMAGE OR PERSONAL INJURY COMPRESSOR SHORT TERM CYCLE PROTECTION This thermostat has a built in short term 5 minute time delay During this 5 minute period the thermo stat will lock out the compressor to allow head pres sure to stabilize If you want to override this feature while testing thermostat operation simply press H and 5 at the same time DO NOT USE THE LOCKOUT BYPASS OPTION UNLESS THE COMPRESSOR OIL HEATERS HAVE BEEN OPERATIONAL FOR 6 HOURS AND THE SYSTEM HAS NOT BEEN OPERATIONAL FOR AT LEAST 5 MINUTES Before you begin programming your thermostat you should be familiar with its features and with the display and the location and operation of the thermostat buttons Your thermostat consists of two parts the thermostat cover and the base To remove the cover gently pull it straight out from the base To replace the cover line up the cover with the base and press gently until the cover snaps onto the base THE THERMOSTAT BASE Other than H and f the following buttons and switches are located behind the door on the bottom of the thermostat cover see fig 6 Pull the door down to open it The Thermostat Buttons and Switches O Red arrow Raises temperature setting Blue arrow Lowers temperat
5. Control So will be made Damage to equipment will occur AUTO AUTO EMERGENCY L_Circuit when power is restored Heat Emer O O a SYSTEM Limit or Limit or Safety HoT Safety i efa vE Switches SYSTEM NEUTRAL Emergency MONITOR Relay SWITCH zH Contactor Stage 2 i Auxiliary Heating Transformer The accessory relay scheme is required when safety circuits exist in both systems RELAY N O ACCESSORY i CONTACT i COMMON 1 N TWO COMMONS MUST Limit or BE JUMPERED TOGETHER Safety Switches Limit or Safety Switches HOT Changeover Relay is energized in COOL when O B switch is in the O position Changeover Relay is energized in HEAT when O B switch is in the B position COMMON r fires VAC Heat Pump Transformer Figure 5 Typical wiring diagram for two transformer systems with safety circuits in BOTH systems NEUTRAL O B TERMINAL SWITCH SELECTION The O B switch on this thermostat is factory set to the O position This will accommodate the majority of heat pump applications which require the changeover relay to be ener gized in COOL If the thermostat you are replacing or the heat pump being installed with this thermostat require the B termi nal to energize the changeover relay in HEAT the O B switch must be moved to the B position ARMCHAIR PROGRAMMING Armchair Programming is a unique feature that allows your ther
6. one final time before beginning thermostat operation 1 Move SYSTEM switch to HEAT position 2 Press VIEW PRGM to view the 1st Monday heating period time and temperature Each time you press VIEW PRGM the next heating period time and temperature for Monday will be displayed in sequence Press HOLD ADV DAY to display Tuesday s 1st heating period program Press VIEW PRGM to check the remaining Tuesday heating period times and temperatures To check each day s heating program press HOLD TEMP ADV DAY to change days then press VIEW PRGM to look at each programming period for the day you may change any time or temperature during this procedure remember that if you change the start time it changes for both heating and cooling Press RUN PRGM Move SYSTEM switch to COOL position Repeat step 2 to check cooling temperatures Press RUN PRGM to begin program operation O01 OO YOUR THERMOSTAT IS NOW COMPLETELY PRO GRAMMED AND READY TO AUTOMATICALLY PROVIDE MAXIMUM COMFORT AND EFFICIENCY
7. 78 F 4th 10 00 PM 62 F 4th 10 00 PM 82 F If you want to change the preprogrammed times and tempera tures follow these steps 1 Determine the heating and cooling temperatures you want to use You may select up to four heating temperatures HEAT 1 HEAT 2 HEAT 3 and HEAT 4 and up to four cooling temperatures COOL 1 COOL 2 COOL 3 and COOL 4 Use the table below to write down the temperatures you have selected Heat Temperatures Cool Temperatures Pit 2 3i 4 ij2 3 a Your selected temperatures Factory pre programmed 70 F 62 F 70 F 62 F 78 F 85 F 78 F 82 F temperatures You may only program heating temperatures you have selected into the heating program and cooling temperatures into the cooling program for example you cannot program the COOL 1 temperature into your heating program You may program the temperatures you choose in any order and you may use the same temperature in consecutive program periods for example you may program period 1 with temperature 1 and periods 2 3 and 4 with temperature 2 You do not have to use all possible temperature choices for example you may want to select temperatures for HEAT 1 and HEAT 2 only in this case the HEAT 3 and HEAT 4 temperatures would stay the same as previously programmed 2 Determine the time periods during which you will program the temperatures you have just selected You must program four periods for each day periods 1
8. WHITE RODGERS 1F84 51 Programmable Electronic Digital Heat Pump Thermostat INSTALLATION AND OPERATION INSTRUCTIONS Operator Save these instructions for future use FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND OR PROPERTY DAMAGE Your new White Rodgers 7 Day Digital Heat Pump Thermostat uses the technology of a solid state microcomputer to provide precise time temperature control This thermostat offers you the flexibility to design heating and cooling programs that fit your needs Features Separate program for each day of the week Simultaneous heat and cool program storage Preprogrammed temperature control Four separate time temperature settings per 24 hour period This thermostat is intended for use with a 24 volt system do not use this thermostat with a millivolt or line voltage system If in doubt about whether your wiring is millivolt line or low voltage have it inspected by a qualified heating and air conditioning contractor or electrician Do not exceed the specification ratings All wiring must conform to local and national electrical codes and ordinances This control is a precision instrument and should be handled carefully Rough handling or distorting components could cause the control to malfunction ELECTRICAL DATA Electrical Rating 20 to 30 VAC 50 60 Hz or D C 0 05 to 1 5 Amps Load per termina
9. efore the next 2 w904 CUT FOR NON ELECTRIC l AUX OO i o BATTERY CUTOUT FOR ARMCHAIR PROGRAMMING OET w903 CUT TO DEFEAT EMR 0 Mounting holes Figure 2 Thermostat base programmed period so that the desired temperature is reached at or near the beginning of the next program period the thermostat calculates 30 minutes for every 2 F temperature change For example assume that the thermostat is programmed to provide an overnight heating temperature of 66 F and during the next program period beginning at 6 00 AM the programmed temperature is 70 F With EMR activated the thermostat will automatically start the heating system at 5 00 AM so that the programmed temperature of 70 F is reached by about 6 00 AM If the overnight room temperature drops only to 68 the thermo stat will start the system at 5 30 to reach the programmed temperature of 70 at 6 00 The thermostat is shipped with the EMR feature active which means that the thermostat will start the system before the beginning of the next program period This feature provides better efficiency by allowing gradual temperature changes using only the first stage of heat and cooling To de activate the EMR function clip wire W903 on the back of the thermostat see fig 1 The thermostat will then wait until the programmed time to start the system for a temperature change This may cause the more costly electric second stage
10. ire zoned hydronic heating systems PART NO 37 5739A Replaces 37 5613C 9637 INSTALLATION REMOVE OLD THERMOSTAT 1 Shut off electricity at the main fuse box until installation is complete Ensure that electrical power is disconnected 2 Remove the front cover of the old thermostat With wires still attached remove wall plate from the wall If the old thermostat has a wall mounting plate remove the thermostat and the wall mounting plate as an assembly 3 Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat 4 Disconnect the wires from old thermostat one at a time DO NOT LET WIRES FALL BACK INTO THE WALL 5 Install new thermostat using the following procedures ATTACH THERMOSTAT BASE TO WALL 1 Remove the packing material from the thermostat 2 If necessary cut the non electric heat jumper see NON ELECTRIC HEAT SYSTEMS and or the EMR jumper see ENERGY MANAGEMENT RECOVERY Check the set ting of the O B switch see O B TERMINAL SWITCH SELECTION 3 If you want to program the thermostat before mounting the thermostat on the wall see ARMCHAIR PROGRAMMING 4 Gently pull the thermostat cover straight off the base Forcing or prying on the thermostat will cause damage to the unit 5 Check that the SYSTEM switch is in the OFF position Connect wires beneath terminal screws on base using appropriate wiring schematic see figs 3 through 5 6 Place base over hole in wa
11. irst time you program your thermostat To use this feature simply enter the program for Monday as described in PROGRAM MING YOUR THERMOSTAT and then press RUN PRGM RESET BUTTON see fig 2 resets the thermostat pro gram to the factory setting This button can be used if you do not like the program you have entered or if you wish to start over in the programming procedure The reset button can also be used to reset the program if the thermostat has been subjected to a voltage spike and the program has become scrambled or frozen PROGRAMMING YOUR THERMOSTAT Now you are ready to program your thermostat This section will help you plan your thermostat s program to meet your needs For maximum comfort and efficiency keep the following guide lines in mind when planning your program e When heating cooling your building program the tem peratures to be cooler warmer when the building is vacant or during periods of low activity During early morning hours the need for cooling is usually minimal Look at the factory preprogrammed times and temperatures shown below If this program will suit your needs simply press the RUN PRGM button to begin running the factory preset program FACTORY PREPROGRAMMING Heating Program for Cooling Program for ALL days of the Week ALL Days of the Week PERIOD TIME TEMP PERIOD TIME TEMP 1st 6 00 AM 70 F 1st 6 00 AM 78 F 2nd 8 00 AM 62 F 2nd 8 00 AM 85 F 3rd 5 00 PM 70 F 3rd 5 00 PM
12. l 1 5 Amps Maximum Total Load All terminals combined THERMAL DATA Setpoint Temperature Range 45 F to 90 F 7 C to 32 C Operating Ambient Temperature Range 32 F to 105 F Operating Humidity Range 0 to 90 RH non condensing Shipping Temperature Range 40 F to 150 F WHITE RODGERS DIVISION EMERSON ELECTRIC CO 9797 REAVIS ROAD ST LOUIS MISSOURI 63123 5398 Printed in U S A DESCRIPTION LCD continuously displays set point and alternately dis plays time and room temperature Temperature override until next program period Manual program override HOLD temperature F C convertibility Temperature range 45 to 90 F Eight terminals for single or two transformer systems O B terminal for heat pump systems Armchair Programming Capability PRECAUTIONS To prevent electrical shock and or equipment damage disconnect electric power to system at main fuse or circuit breaker box until installation is complete Do not use on circuits exceeding specified voltage Higher voltage will damage control and could cause shock or fire hazard Do not short out terminals on gas valve or primary control to test Short or incorrect wiring will damage thermostat and could cause personal injury and or property damage SPECIFICATIONS APPLICATIONS For use with e Heat pump systems with up to two stages heat one stage cool DO NOT USE WITH e Millivolt systems e Systems exceeding 30 VAC and 1 5 amps e 3 w
13. ll and mark mounting hole locations on wall using base as a template 7 Move base out of the way Drill mounting holes 8 Fasten base loosely to wall as shown in fig 2 using two mounting screws Place a level against bottom of base adjust until level and then tighten screws Leveling is for appearance only and will not affect thermostat operation If you are using existing mounting holes or if holes drilled are too large and do not allow you to tighten base snugly use plastic screw anchors to secure subbase 9 Push excess wire into wall and plug hole with a fire resistant material such as fiberglass insulation to prevent drafts from affecting thermostat operation NON ELECTRIC HEAT SYSTEMS Read the following information before clipping the non electric heat jumper If you are unsure of your application contact a qualified serviceperson If your emergency or auxiliary system is non electric gas oil etc and will energize the blower then jumper W904 on the back of the thermostat base must be cut see fig 1 If your emergency or auxiliary heat system is electric and requires that the thermostat energize the fan circuit do not cut jumper W904 ENERGY MANAGEMENT RECOVERY EMR When the EMR feature is activated the thermostat s microcom puter automatically calculates the time it will take to change the room temperature to the next program setting Then the thermo stat will start the heating or cooling system b
14. mostat to be programmed before being mounted on the wall If you do not want to Armchair Program the thermostat can be programmed after being mounted on the wall and system power turned on If you wish to Armchair Program your thermostat temporarily hold a new 9 volt battery against the wires in the battery cutout on the back of the thermostat base for approximately 45 sec onds This will provide a charge that will last approximately 30 to 45 minutes to allow the thermostat to be programmed After programming the thermostat must be mounted on the wall wires connected and system power turned on To have sufficient time to complete the installation without losing the programming hold the 9 volt battery to the terminals on the back of the base for 30 to 45 seconds again after programming the thermostat The battery must be removed before mounting the thermostat on the wall ADJUSTABLE ANTICIPATION The first stage has anticipation that can be set to 2 5 or 4 cycles per hour for heating or cooling The second stage heat has a fixed anticipation To change the first stage anticipation in the HEAT or COOL mode press SET TIME and VIEW PRGM buttons at the same time until the desired setting is displayed S for slow factory setting or F for fast CHECK THERMOSTAT OPERATION If at any time during testing your system does not operate properly contact a qualified serviceperson Fan Operation Turn on power to the system Move SYSTEM s
15. o Hy D o Period 3 Period 4 Cool Heat Cool Heat Cool Temp Time Temp Temp Time Temp Temp 0 1 72 4 8 2 3 3 3 3 3 Enter Heating Cooling Times and Heating Temperatures 1 Move the SYSTEM switch to HEAT 2 Press VIEW PRGM once MO the abbreviation for Monday will be displayed Also displayed are the currently pro grammed start time for the 1st heating cooling period andthe currently programmed HEAT 1 2 3 or 4 temperature for the 1st heating cooling period flashing EXAMPLE This example display shows that for the 1st Monday heating cooling period the start time is 6 00 AM and 70 is the programmed temperature this example reflects factory pre programming 3 Pr If the temperature displayed is not the HEAT 1 2 3 or 4 temperature you want for Monday s period 1 press H or N until the correct temperature is displayed if you keep press ing H or F the HEAT 1 2 3 and 4 temperatures you previously programmed will be alternately displayed To change the displayed start time to the time you have selected for Monday s heating cooling period 1 press SET TIME SET TEMP once the programmed time will flash Press H or u until your selected time is displayed The time will change in 30 minute increments The time that you program will be the start time of Monday s period 1 for both heating and cooling After selecting the correct peri
16. od 1 start time press SET TIME SET TEMP again to return to the change temperature mode Press VIEW PRGM once The currently programmed start time and heating setpoint temperature for Monday s heating cooling period 2 will be displayed ogramming instructions continue on next page 6 Repeat steps 3 and 4 to select the start time and heating temperature for Monday s 2nd heating cooling period 7 Repeat steps 3 through 5 for Monday s 3rd and 4th heating cooling period Monday s heating program is now complete If you are programming your thermostat for the first time and you want programming for all days of the week to be the same as Monday s program press RUN PRGMatthis point and proceed to the SELECT COOLING TEMPERATURES section this COPY DAY feature only works the first time you program your thermostat if you are changing your thermostat s programming you must program each day separately 8 Press HOLD TEMP ADV DAY once TU indicating Tuesday s program will be displayed along with the start time for the 1st heating cooling period and the currently programmed heating setpoint temperature 9 Repeat steps 3 through 7 to complete Tuesday s heating program 10 Continue entering each day s programming until all heating cooling periods and heating temperatures have been se lected 11 Press RUN PRGM to end heating programming Proceed to the SELECT COOLING TEMPERATURES section Select Cooling Temperature
17. or Monday s period 1 press H or 8 until the correct temperature is displayed if you keep press ing A or cE the COOL 1 2 3 and 4 temperatures you previously programmed will be alternately displayed 4 Press VIEW PRGM once The currently programmed start time and cooling setpoint temperature for Monday s heating cooling period 2 will be displayed 5 Repeatstep 3 to select the cooling temperature for Monday s 2nd heating cooling period 6 Repeat steps 3 and 4 for Monday s 3rd and 4th heating cooling period Monday s cooling program is now complete If you are programming your thermostat for the first time and you want programming for all days of the week to be the same as Monday s program press RUN PRGM to begin program opera tion this COPY DAY feature only works the first time you program your thermostat if you are changing your thermostat s programming you must program each day separately 7 Press HOLD TEMP ADV DAY once TU indicating Tuesday s program will be displayed along with the start time for the 1st heating cooling period and the currently programmed cooling setpoint temperature 8 Repeat steps 3 through 6 to complete Tuesday s cooling program 10 Continue entering each day s programming until all cooling temperatures have been selected 11 Press RUN PRGM to end programming and begin program operation CHECK YOUR PROGRAMMING Follow these steps to check your thermostat programming
18. s 1 Move the SYSTEM switch to COOL 2 Press SET TIME SET TEMP four times The display will show the number 1 along with the currently programmed COOL 1 temperature 3 Press H or 5 to change the displayed temperature to your selected COOL 1 setting if you only want to program a temperature for COOL 1 skip to step 7 4 Press SET TIME SET TEMP once The number 1 will change to the number 2 representing COOL 2 5 Press H or until you reach your selected COOL 2 temperature 6 Repeat steps 4 and 5 to select COOL 3 and COOL 4 temperature settings if desired 7 Press RUN PRGM Enter Cooling Temperatures A CAUTION If the outside temperature is below 50 F disconnect power to the cooling system before programming Energizing the air conditioner compressor during cold weather may cause personal injury or property damage 1 Move SYSTEM switch to COOL position 2 Press VIEW PRGM once MO the abbreviation for Monday will be displayed Also displayed are the start time you previously programmed for the 1st heating cooling period and the currently programmed COOL 1 2 3 or 4 tempera ture for the 1st heating cooling period flashing Remember that the time you previously selected is for both heating and cooling periods If you change a programmed start time now it will also change the start time for the heating program 3 If the temperature displayed is not the COOL 1 2 3 or 4 temperature you want f
19. time and room temperature alternately Select Heating Temperatures 1 If you want to change the display from Fahrenheit to Celsius or vice versa press SET TIME SET TEMP and HOLD TEMP ADV DAY at the same time 2 Move the SYSTEM switch to HEAT 3 Press SET TIME SET TEMP four times The display will show the number 1 along with the currently programmed HEAT 1 temperature HEAT rr cu EXAMPLE i 4 Press A or g to change the displayed temperature to your selected HEAT 1 setting if you only want to program a temperature for HEAT 1 skip to step 8 5 Press SET TIME SET TEMP once The number 1 will change to the number 2 representing HEAT 2 6 Press or until you reach your selected HEAT 2 temperature 7 Repeat steps 5 and 6 to select HEAT 3 and HEAT 4 temperature settings if desired 8 Press RUN PRGM Heating Cooling Schedule Plan THIS THERMOSTAT ALLOWS ONE SET OF TIMES FOR BOTH HEATING AND COOLING Heat Cool Heat Cool Heat Cool Heat Cool Time Temp Temp Time Temp Temp Time Temp Temp Time Temp Temp HEAT 1 65 COOL 1 80 SAMPLE 268 COOL 2 78 Heating Cooling Schedule Plan GEAT a ep Book a 7s HEAT 4 72 COOL 4 74 THIS THERMOSTAT ALLOWS ONE SET OF TIMES FOR BOTH HEATING AND COOLING Period 2 See Time Temp Temp Time Temp unday 8 00 AM 70 3 9 00 AM 70 3 oO HA N N D D o o N D N D o o E D
20. ure setting SET TIME SET TEMP button VIEW PRGM program button RUN PRGM program button 6 HOLD TEMP ADV DAY button T FAN switch ON AUTO SYSTEM switch COOL OFF HEAT EMER The Display Indicates day of the week HEAT is displayed when the SYSTEM switch is in the HEAT position COOL is displayed when the SYSTEM switch is in the COOL position COOL or HEAT is displayed flashing when the compressor is in lockout mode O Alternately displays current time and temperature EMERGENCY is displayed when the SYSTEM switch is in the EMER position E Displays currently programmed set temperature this is blank when SYSTEM switch is in the OFF position The word HOLD is displayed when the thermostat is in the HOLD mode OPERATING FEATURES Now that you are familiar with the thermostat buttons and display read the following information to learn about the many features of the thermostat SIMULTANEOUS HEATING COOLING PROGRAM STORAGE When programming you can enter both your heating and cooling programs at the same time There is no need to reprogram the thermostat at the beginning of each season TEMPERATURE OVERRIDE Press H or until the display shows the temperature you want The thermostat will override current programming and keep the room OPERATION fe o EMER MALF WHITE RODGERS SETTIME VIEWPRGM RUN PRGM HOLD TEMP FANON AUTO OFF_HEAT
21. witch to OFF position Move FAN switch to ON The blower should begin to operate Move FAN switch to AUTO position The blower should stop within a short period of time AOUN Heating System 1 Move SYSTEM switch to HEAT position If the auxiliary heating system has a standing pilot be sure to light it 2 Press H to adjust thermostat setting to 90 and hold for five seconds Both stages of the heating system should begin to operate However if the word HEAT is flashing the com pressor lockout feature is operating see Lockout Bypass Option to temporarily override the compressor lockout fea ture during testing 3 Press N to adjust temperature setting below room tem perature The auxiliary heating system will stop immedi ately and the first stage will stop within three to four minutes Cooling System To prevent compressor and or property damage if the outdoor temperature is below 50 F DO NOT operate the cooling system 1 Move SYSTEM switch to COOL position 2 Press 5 to adjust thermostat setting below room tempera ture The blower should come on immediately on high speed followed by cold air circulation However if the fan is running but the compressor is not running and the word COOL is flashing the compressor lockout feature is operating see Lockout Bypass Option to temporarily override the com pressor lockout feature during testing 3 Press H to adjust temperature setting above room tem
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