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Honeywell Thermostat perfect climate comfort center control system User's Manual

1. Result Step LED Terminals Energized Equipment Operation Remove jumper from T terminal Off G Fan relay is energized Reconnect jumper to T terminal On W1 Y1 O B Fan and first stage heat are energized Remove jumper from T terminal Off G W1 Y1 W2 0 85 Fan first and second stage heat are energized Reconnect jumper to T terminal On W1 Y1 W2 AUX Fan first second and auxiliary stage heat are energized O B Remove jumper from T terminal Off G E O B First and second stage heat are de energized Fan and emergency heat are energized Reconnect jumper to T terminal On G W1 Y1 O B Fan and first stage cooling are energized Remove jumper from T terminal Off G W1 Y1 Y2 O B Fan first and second stage cooling are energized Reconnect jumper to T terminal On G W1 Y1 Y2 O B Fan first and second stage cooling with the humidifier are HUM energized Remove jumper from T terminal Off W1 Y1 Y2 O Bb Fan first and second stage cooling with the humidifier and HUM VNT VNT are energized Reconnect jumper to T terminal On None All equipment is de energized Remove jumper from T1 S and 51 On None Returns PC8900A to normal operation terminals The polarity configuration of the reversing valve relay O B determines if the O B is always energized on first call for heat or cool If the reversing valve energizes with heat then it de ene
2. Display Shows Cycles per System Hour Setting Stage 1 Stage 2 AUX HT EM HT Gas or Oil Forced Air W1 CPH 6 W2 6 AUXHT 6 EM 6 Electric Heat W1 CPH 9 W2 CPH 9 AUX HT CPH 9 EM HT CPH 9 Single Stage Heat Pump 3 W1 CPH 3 W2 CPH 3 AUX HT CPH 3 EM HT CPH 3 Hydronic Heat Condensing Gas Furnaces Radiant Floor Heat Gravity 1 W1 1 W2 CPH 1 AUX HT CPH 1 EM HT CPH 1 Cooling only Application no Not connected W1 NC W2 CPH NC AUX HT NC NC heat sources connected N A 4 5 W1 CPH 4 5 W2 CPH 4 5 AUX HT 4 5 HT 4 5 2 5 W1 CPH 2 5 W2 CPH 2 5 AUX HT 2 5 HT 2 5 2 W1 CPH2 W2 CPH 2 AUX HT CPH 2 EM HT CPH 2 1 5 W1 CPH 1 5 W2 CPH 1 5 AUX HT 1 5 HT 1 5 When W2 is not used configure W2 cycle rate to NC not connected Factory setting Use these cycle rate settings if faster or slower cycling is required 68 0173 3 26 Press the up or down arrowhead key until the word HEAT is flashing on the PC8900A display The PC8900A W8900A C is designed to be used on most types of heating systems Initially the PC8900A W8900A C are factory set to be used on the following systems PC8900A W8900A C models Stage 1 and 2 heat Conventional noncondensing gas or oil fired furnace six cycles per hour at 50 percent load PC8900A W8900B models Stage 1 2 and 3 heat Heat
3. M6234 b Press DAY until the desired day is displayed HEAT SETPT COOL 07 70 o UI SATWAKE Ut M6235 29 c Press and hold SELECT PERIOD until the desired period is displayed HEAT SETPT COOL TOT e Urt oi 00671 SAT LEAVE M6236 d Press HEAT COOL SETPOINTS to switch between HEAT SET PT and COOL SET PT HEAT SETPT COOL FAN ree 9 AUTO Ut 1 LEAVE M6237 e Press and hold a TIME key until the desired start time is displayed SAT LEAVE M6238 f Press and hold up or down arrowhead key until the desired temperature is displayed HEAT SETPT COOL FAN cune m UC o M6210 g Follow steps 3a and 4a when changes to the fan and ventilator settings are desired IMPORTANT When in a program pressing the CANCEL key until PROGRAM CLR appears approximately three sec onds cancels your entire program and you need to start again with step 3 8 Canceling One Program Period a Press CANCEL while you are in the period to be cancelled The programmed time temperature vent and fan settings for that period for that day disappear CANCEL o HEAT SETPT COOL eu MON WAKE M10017 9 Starting the Program a Press RUN to start the program o _ _ renun MON M6230 68 0173 3 10 Programming the System Setting a Press
4. Control System Changing Current Period Settings Temporary changes to the current period allow for those times when someone comes home early stays up late or plans an evening out The settings are in effect until the next regularly scheduled period starts 1 Temperature Setpoint a Press HEAT COOL SETPOINTS to display either HEAT SET PT if changing heat setpoint or COOL SET PT if changing cool setpoint HEAT COOL SETPOINTS b Press and hold up or down arrowhead key until the desired temperature is displayed HEAT SETPT COOL FAN I ae nya AUTO Luc rt TEMPORARY M6216 HEAT SETPT COOL Tune une Ut M6209 2 Fan Setting a Press FAN to display the AUTO ON or CIRC fan setting as desired FAN P FAN AUTO AUTO ON CIRC M6221 3 Ventilation Setting a Press VENTILATE to display VENT or not as desired zs VENTILATE Changing Settings for One Week or Less This feature allows setting one temperature that the Comfort Center program holds continuously for up to one week until the day and time programmed HEAT SETPT COOL FAN IF 1700 TO put rut TEMPORARY VENT M6224 4 Programming Hold for 1 to 7 Days a Press HOLD HEAT COOL SETPT rire rare Lint Lie M6241 b Press HEAT COOL SETPOINTS to display either HEAT SET PT if holding heat setpoint or COOL SET PT if holding cool setpoint HE
5. The time period when you can set back winter or set up summer the temperature for energy savings because the family is sleeping Set it to start at your family s normal bedtime Often energy savings are set only in winter so family members can sleep cool in summer Honeywell Home and Building ControlHome and Building Control Honeywell Asia Pacific Inc Honeywell Europe S A Honeywell Latin American Honeywell Honeywell Limited Honeywell Limit e Room 3213 3225 3 Avenue du Bourget Region 1985 Douglas Drive North 35 Dynamic Drive Sun Hung Kai Centre 1140 Brussels 480 Sawgrass Corporate Parkway Golden Valley MN 55422 Scarborough Ontario No 30 Harbour Road Belgium Suite 200 M1V 4Z9 Wanchai Sunrise FL 33325 Hong Kong 68 0173 3 J H Rev 04 01 www honeywell com yourhome post consumer paper fibers
6. to 150 F 40 to 66 Shipping Temperature Range All Components 20 to 150 F 29 to 66 C Operating Relative Humidity Range All Components 5 percent RH to 90 percent RH noncondensing Mounting Means C7089A Outdoor Sensor Mounts outside of living space using locally obtained mounting hardware C7100A Discharge Air Sensor Mounts in discharge air duct near air exchanger in a 2 x 4 in outlet box or on a flat duct or plenum surface The temperature sensor probe passes through a 7 8 in knockout in the 2 x 4 in outlet box C7189A Remote Indoor Sensor Mounts directly on the wall using mounting screws and anchors provided PC8900A Control Panel Without Remote Sensor Mounts directly on the wall in liv ing space using mounting screws and anchors provided With Remote Sensor Mounts directly on the wall ina closet or other convenient location using mounting screws and anchors provided W8900A C Remote Module Mounts directly on the wall near HVAC equipment or cold air return using mounting screws and anchors provided Table 1 W8900A C Models Use with Heat Cool Vent Humidity Humidity Model System Type Stages Stages Adjustment Adjustment Heat Adjustment Cool Use with W8900A Conventional 2 2 PC8900A W8900B Heat pump 3 2 yes yes yes PC8900A W8900C Conventional 2 2 yes yes yes PC8900A a Models with O and B terminals have single stage coolin
7. Hookup diagram of 3 stage heat 2 stage cool heat pump system 15 68 0173 3 C7189A REMOTE AIR W8900B TEMPERATURE SENSOR COMPRESSOR MONITOR C7100 DISCHARGE AIR TEMPERATURE SENSOR C7089A OUTDOOR AIR TEMPERATURE SENSOR R8222N1011 STAGE 1 HEAT RELAY S S SYSTEM TRANSFORMER HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT VENTILATION EQUIPMENT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED JUMPER R TO RH DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS CONNECT HEATING CHANGEOVER VALVE TO R8222N1011 AND CONFIGURE PC8900 FOR CHANGEOVER IN HEATING MODE CONNECT G Y2 E AUX AND W2 TERMINALS AS REQUIRED SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED PEPE PE FEE CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4486D Fig 18 Hookup diagram for heat pump application requiring separate W1 and Y1 terminals with heating changeover 68 0173 3 16 C7189A REMOTE AIR W8900B TEMPERATURE SENSOR COMPRESSOR MONITOR C7100 DISCHARGE AIR TEMPERATURE SENSOR C7089A OUTDOOR AIR TEMPERATURE SENSOR R8222N1011 ec STAGE 1 COOL RELAY HOT TRANSFORMER A HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT A VENTILATION EQUIPMENT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OV
8. remote and discharge temperature sen sors available Fan overrun in cooling Ventilation control The W8900A C mounts near the equipment The PC8900A heating cooling ventilation and dehumidification equipment and all additional sensors are wired to the W8900A C Compatible with most 24 Vac Systems Remote sensor discharge sensor outdoor sensor and CO monitor available Optional remote communications available Contents C h rc 1 Features Rm 1 Specifications a a te d deinde 2 Ordering Information sse 2 InistallatlOr cem tette e RE R rines 5 Wiring Diagrams eene 9 W8900A C Hookup Diagrams 9 W8900B Hookup Diagrams 14 W8900A B C Humidity Control Hookup Diagrams 18 Installer Setup nece aee etd ete 24 Programming PC8900A 27 Checkout 33 Operation I u dere idees 34 Troubleshooting aa otii tte teinte 40 GloSSaly naima reote etn tuts 44 68 0173 3 SPECIFICATIONS IMPORTANT The specifications given in this publication do not include normal manufacturing tolerances therefore an individual unit might not exactly match the listed specifications Also this product is tested and cali brated under closely controlled conditions and some minor differences in
9. MODE SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE A IF SEPARATE Y1 AND W1 TERMINALS ARE REQUIRED REFER TO FIGURES 18 AND 19 A CONFIGURE PC8900 FOR NO CONNECTION TO TERMINALS Y2 E AUX AND W2 FOR SINGLE STAGE HEAT PUMP SYSTEM M4483D Fig 16 Hookup diagram for 2 stage heat 1 stage cool in heat pump system 68 0173 3 14 CO MONITOR C7189A REMOTE AIR COMPRESSOR W8900B TEMPERATURE SENSOR MONITOR C7100 DISCHARGE AIR TEMPERATURE SENSOR C7089A OUTDOOR AIR TEMPERATURE SENSOR CHANGEOVER RELAY Ex e STAGE 2 COMPRESSOR SYSTEM TRANSFORMER A HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT VENTILATION AUXILIARY EQUIPMENT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED STAGE 1 COMPRESSOR EMERGENCY HEAT RELAY o S 5 JUMPER R TO RH DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS CONFIGURE PC8900 FOR CHANGEOVER IN HEATING MODE OR COOLING MODE JUMPER Y2 AND W2 TERMINALS IF NO EMERGENCY HEAT RELAY FIELD INSTALL JUMPER E TO AUX SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED M4485D gt gt gt gt gt gt P CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE Fig 17
10. Monitor with uncommitted contacts W8735B W8900A C Telephone Access Remote Module Module C7100A Discharge Air Sensor Fig 1 System components and accessories 68 0173 3 1 1 2 38 a 3 1 4 83 a 8 1 2 216 Fig 3 Dimensions for C7089A Outdoor Sensor Mounting Clip in in mm M7513 Fig 2 Dimensions for 205224A Wall Cover Plate in in mm 1 3 16 4 13 16 30 46 3 4 ah D D 13 114 336 19 M4461 1 13 16 46 Fig 4 Dimensions for C7100A Discharge Air Sensor in in mm 4 5 8 117 Honeywell 1 18 gt 29 2 3 4 70 em 2 3 4 70 l M4465 FRONT VIEW SIDE VIEW FRONT VIEW COVER OFF Fig 5 Dimensions for C7189A Remote Indoor Sensor in in mm 68 0173 3 4 system SET SYSTEM CLOCK HEAT OFF COOL CANCEL FAN IHEAT COOL DAY AUTO ON CIRC ISETPOINTS SELECT PERIOD HUMIDITY ENTILATE HOLD IME RUN NOTE PC8900 SHOWN WITH COVER REMOVED M6356 Fig 6 Dimensions for PC8900A Control Panel in in mm 7 136 197 8 3 4 222 Y y 202 ME gt 9 4 7 8 124 gt 6 3 8 163 gt 4 3 8 5 6 3 8 163 I Fig 7 Dimensions for W8900A C Remote NOTE W8900 SHOWN WITH COVER REMOVED M6355 Module in in mm ME
11. OR DEHUMIDIFIER EQUIPMENT VENTILATION EQUIPMENT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED L1 HOT DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER L2 A OIL PRIMARY W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED P RES CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4490D Fig 15 Hookup diagram in oil heating electric cooling system oil primary has its own transformer 13 68 0173 3 W8900B Hookup Diagrams CO MONITOR W8900B C7189A REMOTE AIR TEMPERATURE SENSOR COMPRESSOR MONITOR C7100 DISCHARGE AIR TEMPERATURE SENSOR PC8900 C7089A OUTDOOR AIR TEMPERATURE SENSOR CHANGEOVER N gt COMPRESSOR CONTACTOR A EMERGENCY HEAT RELAY TRANSFORMER AUXILIARY HEAT RELAY HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED JUMPER R TO RH A VENTILATION EQUIPMENT DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS CONFIGURE PC8900 FOR CHANGEOVER IN HEATING MODE OR COOLING
12. at the selected wall location Pull approximately three inches of wire through the hole Color coded 18 gauge thermostat wire is rec ommended See Fig 22 If the old thermostat leaves marks on the wall that the PC8900A does not cover order part no 205224A Wall Cover Plate to mount between the PC8900A and the wall See Fig 23 Use the follow ing instructions and at step 7 put the wall cover plate between the wall and wiring plate WALL WIRES THROUGH WALL WALL ANCHORS No a MOUNTING HOLES 4 MOUNTING SCREWS 3 A USE THREE MOUNTING HOLES THAT BEST FIT APPLICATION MAIER Fig 22 Mounting PC8900A Wiring Plate Remove the PC8900A from the wiring wallplate by pull ing the PC8900A straight off the wallplate Position the PC8900A Wiring Plate on the wall Level the wiring plate for appearance only using the posts on top of the wiring plate device functions prop erly even when not level Remove wiring plate from wall and drill 3 16 in holes in wall if drywall as marked For firmer material such as plaster or wood drill 7 32 in holes Gently tap anchors provided into drilled holes until flush with the wall WIRES THROUGH S WALL OPENING a Os NOTE When using a wall cover plate be sure to place the wall cover plate between the wall and the wiring plate Position wiring plate over holes in wall or outlet box pulling wires through wiring opening Loosely insert three mounting screws in
13. during the first stage of both heating and cooling on the W8900B The minimum off timer can be disabled in the installer setup mode and can be overridden in the checkout mode Fan Control The fan comes on when any of these conditions are present it can take up to 20 seconds for the fan to turn on NOTES FAN ON This setting means the fan runs 100 percent of the time during this period FAN AUTO The AUTO setting means the fan runs only with the heating or cooling system FAN CIRC When the fan is set to CIRC the fan runs at least 30 percent of the time including the time the fan is on while the heating or cooling system is run ning When the heating or cooling system is not running at all the fan runs for ten minutes on and 20 minutes off Protection against fan short cycling is built into the device The installer setup has the ability to extend fan operation following a cooling cycle When selected the fan run time at the end of a cooling cycle is extended 80 seconds Ventilation Control When the Comfort Center program is configured for ventilation the ventilator contacts are closed activating high speed ventilation equipment in response to any of the following conditions Ventilation request from the user High CO condition measured by CO monitor High humidity condition while in the heating mode Programming The ventilation control is set for a 20 second cycle so the user can wait up to 20 s
14. is not satisfied the Comfort Center program turns on the heat When the heat raises the temperature so there is a call for cooling and the 68 0173 3 dehumidification requirement is still not met cooling starts again This switching continues until the dehumidification and cooling setpoints are met This feature assures that the occupants do not experience excessive temperature drop due to the need for dehumidification CO Monitor When a CO monitor is configured and installed the Comfort Center programl turns on ventilation if configured for ventilation or system fan if configured for no ventilation in response to a high CO monitor reading 3900 3800 3700 wo I a e O e 3300 OHM RESISTANCE gt 3200 3100 3000 2900 2800 40 20 0 20 40 60 80 100 C40 29 18 7 5 169 27 38 TEMPERATURE A RESISTANCE INCREASES 4 84 OHMS PER 1 F CHANGE OR 8 7 OHMS PER 1 C CHANGE M6358 C7089A Outdoor Temperature Sensor The outdoor temperature sensor is necessary for the Frost control feature to be activated The Comfort Center control System takes the outdoor temperature reading and calculates the dewpoint to help prevent humidity from accumulating on the windows With the C7089A installed and configured the user can read the outdoor temperature by pressing the CHECK key See Fig 39 for the resistance vs temperature characteristics for the C7089A Ou
15. m O WAKE FAN AUTO ON CIRC M6213 NOTES AUTO means the fan only runs when heating or cooling is running ON means the fan runs during this entire period CIRC means the fan runs at least 30 percent of the time during this period including when the heating or cooling system is running 4 Setting Ventilator a Press VENTILATE to display VENT when increased ventilation is desired during the WAKE period FAN AUTO ON CIRC b When normal ventilation is desired press VENTI LATE until VENT is not displayed m J VENTILATE se Em 5 Programming LEAVE RETURN and SLEEP a Repeat steps 2a through 4b for each period to be programmed on Monday HEAT COOL SETPT FAN apo m Ol M6213 HEAT COOL SETPT FAN m Ut M6212 The Comfort Center Monday program is now complete Programming The Remaining Days 6 Copying the First Day Program a Hold down the DAY key until all the days of the week have appeared on the screen OTTO Dlo O Cu SUN SLEEP M6233 119171171 foL 0 4 MON RUN M6230 NOTE The Monday program is now copied to all seven days of the week If copy fails start over see Pro gramming the First Day section 7 Changing the Program a Press SELECT PERIOD to enter the programming mode HEAT SETPT COOL Frome OTe 70 0 200 WAKE
16. usage is by having two recovery ramps one for stage one compressor and one for auxiliary heat 35 COMPRESSOR SETPOINT 4 AUXILIARY HEAT SETPOINT ROOM TEMPERATURE WAKE M6406A Fig 33 Heat pump Adaptive Intelligent Recovery ramp Operation Seasonal weather changes allow the Adaptive Intelligent Recovery ramp to change on a daily basis and still meet the comfort needs of the occupants In the fall heating loads are light so recovery begins very late in the energy savings period As fall changes to winter loads increase and the Adaptive Intelligent Recovery ramp shifts so recovery begins earlier each day Conversely recovery begins later each day as heating loads decrease from winter to spring See Fig 34 and 35 SETPOINT TEMPERATURE ACTUAL TEMPERATURE 60F SLEEP WAKE M6185A HEATING MODE Fig 34 Fall to winter Adaptive Intelligent Recovery T ramp 7OF SETPOINT TEMPERATURE ACTUAL TEMPERATURE 60 F SLEEP WAKE M6186 Fig 35 Winter to spring Adaptive Intelligent Recovery T ramp Energy Savings Period In mild to moderate weather the PC8900A calls on the heat pump only when the sensed temperature falls below the setpoint Under mild to moderate conditions the more costly auxiliary heat is not needed In severe weather the heat pump cycles only when the sensed temperature falls below setpoint and auxiliary heat cycles continuously S
17. 1 Cuta 7 8 in 22 mm hole in the duct or plenum surface at the desired location 2 Insertthe sensor probe into the duct or plenum with inlet holes facing the air stream 3 If necessary use the flange provided as a template to mark and drill four holes for 8 32 mounting screws 4 Fasten the sensor to the duct or plenum surface with the four 8 32 sheetmetal screws provided TO MOUNT IN A2 X4 IN JUNCTION BOX 1 Cuta 7 8 in 22 mm hole in the duct or plenum surface at the desired location 2 Remove the center rear knockout from the 2 x 4 in junc tion box and insert the sensing probe through the knockout with the flange flat against the junction box 3 Using the flange provided as a template mark and drill four holes in the junction box and the duct or plenum surface for 8 32 mounting screws 4 Insert sensor probe through both the junction box knockout and the 7 8 in 22 mm hole drilled in the duct or plenum and fasten the junction box and sensor to the duct or plenum surface 68 0173 3 24 Wiring the C7100A Discharge Air Sensor if needed N CAUTION Failure to use the following wiring practices can introduce electrical interference noise which can cause erratic system operation Keep wiring at least one foot away from large inductive loads such as motors line starters lightning ballasts and large power distribution panels Use shielded cable to reduce interference when rerouting wires is not possible
18. 89A see Fig 26 2 Push excess wire back into the hole Plug the hole with nonhardening caulk putty or insulation to prevent drafts from affecting the C7189A and PC8900A performance 3 Remove the C7189A Cover 4 Mount the C7189A on the wall or junction box using the screws and anchors provided 5 Level the C7189A for appearance only The device functions properly even when not level 6 Install the C7189A Cover 68 0173 3 HOT A Q e 999966696666 m A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A IF MORE THAN ONE C7189 REMOTE SENSOR IS REQUIRED REFER TO DIAGRAM BELOW A IF SHIELDED CABLE IS REQUIRED GROUND TO GND TERMINAL ON W8900 W8900 A SENSORS MUST BE ARRANGED IN THIS NUMBER AND CONFIGURATION FOR PROPER OPERATION M4456A Fig 26 Wiring diagram for C7189A Remote Sensor to W8900A C Remote Module Mounting the C7089A Outdoor Sensor if needed Location Guidelines Locate the C7089A Outdoor Sensor where it will be safe from tampering 68 0173 3 22 Choose an outdoor location for the sensor where there is good air circulation at average outdoor temperature See Fig 27 Locate the sensor where it can measure the true outdoor ambient temperature On a flat surface is best Avoid locations that can introduce errors in sensor measurements such as areas of direct sunlight or high temperature or areas
19. 9 Fig 38 Adaptive Intelligent Recovery TM ramp for a heat pump in severe weather 0 Comfort Period In mild weather the heat pump cycles continuously to maintain the sensed temperature within 1 F of the setpoint In moderate weather the heat pump cycles longer minimizing the need for auxiliary heat The heat pump runs the majority of the time in severe weather and only shuts off for brief periods using auxiliary heat to maintain temperature within 1 F of setpoint See Fig 36 through 38 THERMAL PERFORMANCE During severe weather the PC8900A actually controls closer to the setpoint than a conventional control This is because the heat anticipator is replaced by two electronic control strategies cycling by heat anticipation and proportional plus integral 1 control Electronic cycling by heat anticipation acts like a traditional heat anticipator except that it never needs adjusting for various control circuit load currents It cycles off the heating system slightly before the room temperature reaches the setpoint to keep heat that remains in the ductwork from overheating the room In severe weather a conventional control with a heat anticipator tends to turn off the system too soon so the effective setpoint is somewhat below the setpoint In very cold weather the difference between setpoint and effective control point can be 5 F or 6 F 2 C or 3 C with a conventional control This phenomenon is called droop
20. AT COOL SET PT Te re nane Lit LI M6241 c Press and hold up or down arrowhead key until desired holding temperature is displayed HEAT COOL SETPOINTS d Press FAN for fan setting and VENTILATE for venti lation setting during hold HEAT SETPT COOL r rv rm LIne M6242 HEAT SETPT COOL FAN FAN Oo Um AUTO ON CIRC Ut Ut HEAT SETPT COOL FAN 4 Eo Tp c9 VENTILATE UI A VENT M6246 f Press a TIME key until the desired end time is dis played M6247 31 NOTE To cancel steps 4a through 4f press the CANCEL key The temperature fan and ventilation setting are in effect until the day and time selected At that time the Comfort Center program returns to the regularly programmed settings Changing Settings for an Indefinite Amount of Time The hold feature keeps one temperature that the Comfort Center program holds continuously until CANCEL is pressed to resume the program 5 Programming Indefinite Hold a Press HOLD HEAT COOL SETPT rr ru Lt nr LO M6241 b Press HEAT COOL SETPOINTS to display either HEAT SET PT if holding heat setpoint or COOL SET PT if holding cool setpoint HEAT SETPT COOL Te Ze nane DO 6242 c Press and hold up or down arrowhead key until desired holding temperature is displayed HEAT SETPT COOL Tuan Ut
21. E HOUSE WILL BE AT THE DESIRED TEMPERATURE WHEN THE PERIOD STARTS SYSTEM CAN BE CONFIGURED FOR CONVENTIONAL ADAPTIVE INTELLIGENT RECOVERY IS SELECTED PRESENT SETTING APPEARS INACCURATE RECOVERY REFER TO INSTALLATION SECTION ZX AND V7 KEYS BEING USED REPROGRAM PC8900 TO MAKE PERMANENT CHANGE IN TO ADJUST TEMPERATURE PROGRAM REFER TO PROGRAMMING INSTRUCTIONS PC8900 DISPLAY FLASHES TIME AND DAY HAVE BEEN LOST DUE REPROGRAM TIME AND DAY REFER TO PROGRAMMING DURING OPERATION TO POWER OUTAGE INSTRUCTIONS PARTIAL PC8900 DISPLAY INOPERATIVE PC8900 REPLACE PC8900 HEAT AND COOL SETPOINTS NEED TO BE ADJUSTED REGULARLY COOLING WILL NOT COME ON NO POWER TO W8900 CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT COOL SYSTEM POWER IS ON CHECK FOR LOOSE CONNECTIONS AT PC8900 W8900 C7189 OR EQUIPMENT PC8900 SYSTEM SETTING IS INCORRECT CHECK THAT PC8900 IS SET TO COOL OR AUTO 5 MINUTE COMPRESSOR PROTECTION THE PC8900 HAS A 5 MINUTE BUILT IN TIME DELAY IF ACTIVATED ACTIVATED ALLOW UP TO FIVE MINUTES AFTER CHANGING THE SETTING BEFORE THE COMPRESSOR STARTS CONDUCT SELF TEST SEE CHECKOUT REFER TO MANUFACTURER SPECIFICATIONS TO TROUBLESHOOT EQUIPMENT PC8900 INOPERATIVE INCORRECT WIRING SEE WIRING DIAGRAM COOLING EQUIPMENT IS INOPERATIVE REFER TO MANUFACTURER SPECIFICATIONS TO TROUBLESHOOT EQUIPMENT COOLING SETPOIN
22. ERLOAD PROTECTION AS REQUIRED JUMPER R TO RH DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS CONNECT COOLING CHANGEOVER VALVE TO R8222N1011 AND CONFIGURE PC8900 FOR CHANGEOVER IN COOLING MODE CONNECT G Y2 E AUX AND W2 TERMINALS AS REQUIRED SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4487D Pere gt gt gt gt gt Fig 19 diagram for heat pump application requiring separate Y1 and W1 terminals with cooling changeover 17 68 0173 3 W8900A B C Humidity Control Hookup Diagrams W8900A B C SYSTEM TRANSFORMER POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS A CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE M18588 Fig 20 Hookup diagram connecting cooling humidity control in parallel with temperature control W8900A B C SYSTEM TRANSFORMER POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED VN JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS A CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE A USE OF A SEPARATE POWER SUPPLY TO RUN THE HUMIDIFIER IS RECOMMENDED M4997 Fig 21 Hookup diagram connecting humidifi
23. ETWEEN C7100 AND W8900 AND INDICATES A COOL SYSTEM REFER TO MANUFACTURER SPECIFICATIONS TO FAILURE WHILE IN COOLING MODE TROUBLESHOOT EQUIPMENT WRONG DISCHARGE AIR SENSOR IS CHECK THAT C7100 DISCHARGE AIR SENSOR IS BEING USED INSTALLED W8900 CANNOT READ DISCHARGE CHECK CONNECTIONS BETWEEN C7100 AND W8900 AIR TEMPERATURE PC8900 CONFIGURED FOR DISCHARGE RECONFIGURE PC8900 AIR TEMPERATURE SENSOR BUT NOT INSTALLED WRONG DISCHARGE AIR SENSOR IS CHECK THAT C7100 DISCHARGE AIR SENSOR IS BEING USED INSTALLED FAN RUN TIME HAS EXCEEDED 1 CLEAN AIR CLEANER CELLS OR REPLACE AIR FILTER 720 HOURS 2 PRESS CANCEL KEY WHILE VIEWING FILT CHG MESSAGE DISCHARGE AIR SENSOR IS PRESENT CHECK CONNECTIONS BETWEEN C7100 AND W8900 AND INDICATES A HEAT SYSTEM REFER TO MANUFACTURER SPECIFICATIONS TO FAILURE WHILE IN HEATING MODE TROUBLESHOOT EQUIPMENT WRONG DISCHARGE AIR SENSOR IS INSTALLED CHECK THAT C7100 DISCHARGE AIR SENSOR IS BEING USED HEAT PUMP COMPRESSOR FAILURE CHECK HEAT PUMP REFER TO MANUFACTURER RELAY HAS ENERGIZED W8900 L SPECIFICATIONS TO TROUBLESHOOT EQUIPMENT TERMINAL W8900 CANNOT READ OUTDOOR AIR CHECK CONNECTIONS BETWEEN C7089 AND W8900 TEMPERATURE PC8900 CONFIGURED FOR OUTDOOR RECONFIGURE PC8900 FOR LOCAL SENSOR ONLY TEMPERATURE SENSOR BUT NOT INSTALLED WRONG OUTDOOR TEMPERATURE CHECK THAT C7089 OUTDOOR TEMPERATURE SENSOR IS SENSOR IS INSTALLED BEING USED icc de
24. FF SLEEP 10 00 PM 62 F 82 F AUTO OFF PROGRAM The times temperatures fan and ventilation settings you choose to define the comfort periods WAKE RETURN and energy savings periods LEAVE SLEEP for each daily schedule SETBACK Reducing the temperature in the house for a set period every day in winter for energy savings The lower temperature is the energy savings temperature SETUP Raising the temperature in the house for a set period every day in summer for energy savings The higher temperature is the energy savings temperature SETPOINT The temperature humidity or frost setting you program on the PC8900A The PC8900A turns the appropriate equipment on and off to maintain this setting until another setting goes into effect SYSTEM LIGHT YELLOW On the PC8900A this lights glows when there is a call for heating or cooling TIME PERIOD One of four program periods WAKE LEAVE RETURN and SLEEP available with the PC8900A One period begins when the previous period ends WAKE The time period when you want the house at a comfortable temperature while the family gets up and gets ready to leave for work and school LEAVE The time period when you can set back winter or set up Summer the temperature for energy savings because the family is usually away from home RETURN The time period when you want the house at a comfortable temperature for family activities in the evening before bedtime SLEEP
25. Ground the shielded cable to the ground terminal on the W8900A C IMPORTANT Erratic temperature readings from a sensor can occur as a result of any of the wiring practices described below Use shielded cable to reduce inter ference if rerouting sensor wiring is not possible These practices must be avoided to assure proper operation Do not route temperature sensor wiring with building power wiring next to control contactors or near light dimming circuits electric motors or welding equip ment Avoid poor wiring connections Avoid intermittent or missing building earth ground If the discharge air temperature fails to display when the check key is pressed see the Troubleshooting Section N CAUTION Disconnect power supply before connecting the wiring to prevent electrical shock or equipment damage Wiring must comply with applicable codes ordinances and regulations Wire the C7100A Discharge Air Sensor to the terminals marked T and T1 on the W8900A C Remote Module Use 1 4 in female quick connects on the C7100A INSTALLER SETUP IMPORTANT Installer setup must be done for the HVAC equip ment and the PC8900A W8900A C to operate properly The installer setup mode is used by the installer to configure the PC8900A W8900A C for the HVAC equipment used at the installation heating cooling ventilation humidification air cleaning and to configure the PC8900A operation changeover mode remote sensors a
26. Honeywell Perfect Climate Comfort Center PC8900A W8900A C GENERAL This document contains information on the Perfect Climate Comfort Center Control System including components and accessories Some components and accessories include the PC8900A Control Panel W8900A C Remote Module C7189A Remote Indoor Sensor C7089A Outdoor Sensor C7100A Discharge Air Sensor CO2 Monitor CM8900A Communication Module and W8735B Telephone Access Module The Comfort Center control system provides 24 Vac energy saving control for a heating and cooling system while providing reliable and precise temperature ventilation and humidity control U S Registered Trademark Copyright 2001 Honeywell All Rights Reserved Control System PRODUCT DATA FEATURES The PC8900A mounts in the living space and accurately measures and controls room temperature and humidity Only four wires required for installation Large continuously lit LCD Seven day auto copy programming Simultaneous display of heat and cool setpoints Keyboard lockout protection available No batteries required indefinite program retention Circulation fan setting improves indoor air quality Field configurable for Automatic or manual changeover F or C display 12 or 24 hour clock Adaptive Intelligent Recovery control or conven tional recovery Humidity control in heating or cooling Outdoor
27. LA 1 T Sensor M6366 M6380 UT oct yt System has an Energy Recovery ET NOCT TITLE System has an outside air damper Calls Woot LIS v Ventilator for example Honeywell NET INI i r for ventilation close VNT contacts and vex Calls for ventilation close activate system fan UT NIT NIA System has no ventilation equipment A JM call for ventilation activates the system fan M6382 mere Communications should always be Communication module is activated 1 14 0 configured to N If CM8900A Lito T W8900A C automatically changes to this Communication Module is present it wx Setting when communication is received changes to Yes automatically FUIT 0 vJ W8900B model only O B terminal vt si r1 W8900B model only O B terminal FN rT N 1 energized in heating only Use this VL N Lt energized in cooling only Use this setting for heat pumps with cooling changeover System has a humidifier that is used in the heating mode System has no humidifier 25 68 0173 3 Table 4 System Setting Options Other Choices Press Up or Down Arrowhead Keys to Change Tt System does not control high humidity in I cooling Factory Setting Description Description System set to control humidity in w 14 ry cooling Can also have reheat LL Pd W8900C only PC8900A displays temperature se
28. MMENDED Peer pem CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4478D Fig 12 Hookup diagram for 1 stage or 2 stage heating and cooling in conventional system with single transformer 68 0173 3 10 W8900A C C7189A REMOTE AIR TEMPERATURE SENSOR C7100 DISCHARGE AIR TEMPERATURE SENSOR PC8900 C7089A OUTDOOR AIR TEMPERATURE SENSOR FAN RELAY L2 STAGE 1 Li COOL RELAY HOT sySTEM TRANSFORMER A HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT S8610U A VENTILATION VENT EQUIPMENT GND 24V DAMPER MV MV PV PV BURNER GND 24V TH W PLUG D892 VENT DAMPER LIMIT CONTROLLER CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4489D SENSE SPARK F VALVE SENSOR 1ST 2ND i OPERATOR OPERATOR 7 m DUAL VALVE COMBINATION GAS CONTROL IGNITER PILOT BURNER GROUND POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED PILOT GAS JUMPER R TO RH TO RC FOR SINGLE SUPPLY TRANSFORMER APPLICATIONS DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED gt gt gt gt P gt P Fig 13 Hookup diagram for heating cooling intermittent pilot gas burning ignition syst
29. N M6230 68 0173 3 32 2 Review Current Setpoints and Readings Use the following instructions to check the setpoints for the current period only and to check the actual humidity and outdoor readings NOTE Return to the program at any time by pressing RUN a Press CHECK to display the current humidity or outside temperature if outside sensor is installed TOC TE 001709 x OR b Press CHECK again to display the current humidity reading HUMIDITY d Press CHECK to display two temperatures and HEAT SET PT or COOL SET PT in the display HEAT COOL SETPT M6255 e Press HEAT COOL SETPOINT to display the other setpoint HEAT COOL SETPOINTS f Press CHECK again to display the current FAN setting HEAT SETPT COOL Tu cune Ut Ut g Press CHECK again to display the current VENT setting h Press CHECK again to display the system setting M6259 i Press CHECK or RUN to return to the program RUN toL OL ToT MON M6230 Activating or Deactivating Keyboard Lockout When the keyboard lockout is activated the programs time and day humidity and installer setup information cannot be changed However hold temporary settings and the system setting can be changed Use the following steps to check or change the keyboard setting 1 Press and hold RUN until OPEN KEY or LOCK KEY show in the display approx
30. ON ARE ACTIVATED TO VENTILATE LIVING SPACE A HIGH CO2 CONDITION EXISTS IN THE LIVING SPACE A REMOTE SWITCH IS CALLING FOR TURN REMOTE SWITCH OFF VENTILATION TEMPERATURES ARE PC8900 IS NOT CONFIGURED PROPERLY RECONFIGURE PC8900 FOR F DISPLAYED IN C TIME IS DISPLAYED IN MILITARY PC8900 IS NOT CONFIGURED PROPERLY RECONFIGURE PC8900 FOR 12 HOUR CLOCK TIME EX 14 00 DISCHARGE AIR TEMPERATURE PC8900 IS NOT CONFIGURED FOR NOT DISPLAYED WHEN CHECK DISCHABGE AIF TEMPERATURE RECONFIGURE PC8900 FOR DISCHARGE AIR TEMPERATURE POWER OUTAGE HAS REMOVED ENTER INSTALLER SET UP MODE FOR A FEW SECONDS DISCHARGE AIR TEMPERATURE AFTER LEAVING SET UP MODE DISCHARGE AIR FROM DISPLAY TEMPERATURE IS DISPLAYED UNTIL NEXT POWER OUTAGE M18744 Fig 41 Troubleshooting procedures Continued 43 68 0173 3 GLOSSARY ADAPTIVE INTELLIGENT RECOVERY SETTING The time when the PC8900A operates the heating or cooling equipment to return the house from the energy savings to the comfort temperature The PC8900A starts the recovery period earlier than the WAKE or RETURN period so the house will be at the comfort setting by your chosen time CHECK LIGHT RED This light glows as a prompt to examine messages in the CHECK LIST section COMFORT TEMPERATURE The temperature you want in the morning when you get up WAKE period and in the evening when you re home RETURN period CONVENTIONAL RECOVERY SETTING The time
31. ORMER A POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED A JUMPER R TO RH FOR SINGLE HEAT TRANSFORMER APPLICATIONS CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER DURING INSTALLER SETUP A W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS A SEE VENTILATION INSTRUCTIONS FOR WIRING A GROUNDING THE GND TERMINAL IS NOT RECOMMENDED A CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4479D Fig 11 Hookup diagram for heating cooling system in conventional system with multiple transformers 9 68 0173 3 W8900A C C7189A REMOTE AIR TEMPERATURE SENSOR CO MONITOR C7100 DISCHARGE AIR TEMPERATURE SENSOR PC8900 C7089A OUTDOOR AIR TEMPERATURE SENSOR FAN RELAY STAGE 2 COOL RELAY STAGE 1 COOL RELAY S SYSTEM TRANSFORMER STAGE 1 HEAT RELAY OR DEHUMIDIFIER EQUIPMENT STAGE 2 HEAT RELAY POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED VENTILATION EQUIPMENT JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECO
32. OT EQUIPMENT INCORRECT WIRING SEE WIRING DIAGRAM HEATING EQUIPMENT IS INOPERATIVE REFER TO MANUFACTURER SPECIFICATIONS TO TROUBLESHOOT EQUIPMENT HEATING SETPOINT IS TOO LOW ADJUST SETPOINT USING ZA AND X KEYS HEATING SYSTEM IS NOT COMPATIBLE REFER TO WIRING DIAGRAMS ADD R8222 RELAY R8339 CONTROL CENTER OR S566 SWITCH IF REQUIRED ROOM TEMPERATURE AT REMOTE RELOCATE REMOTE SENSOR WHERE IT IS NOT AFFECTED SENSOR LOCATION IS TOO HIGH BY HOT AREAS COLD AREAS OR DEAD AIR AREAS PC8900 CONFIGURED FOR ONLY ONE RECONFIGURE PC8900 TO ACCOMMODATE ALL STAGES OF STAGE OF HEATING HEAT REQUIRED M18742 Fig 41 Troubleshooting procedures Continued 41 68 0173 3 SYMPTOM POSSIBLE CAUSE ACTION TEMPERATURE CHANGES PC8900 PROGRAMMED INCORRECTLY CHECK THE PROGRAM TIMES FOR THE PERIOD IN QUESTION OCCUR AT THE WRONG TIMES BE SURE THAT AM AND PM INDICATIONS ARE CORRECT MAKE SURE THE CURRENT DAY AND TIME ARE CORRECT REPROGRAM IF NECESSARY REMEMBER THAT WITH ADAPTIVE INTELLIGENT RECOVERY THE HEATING OR COOLING SYSTEM COMES ON BEFORE THE WAKE AND RETURN START TIMES SO THE HOUSE WILL BE AT THE DESIRED TEMPERATURE WHEN THE PERIOD STARTS SYSTEM CAN BE CONFIGURED FOR CONVENTIONAL RECOVERY REFER TO INSTALLATION SECTION ADAPTIVE INTELLIGENT RECOVERY REMEMBER THAT WITH ADAPTIVE INTELLIGENT RECOVERY IS SELECTED THE HEATING OR COOLING SYSTEM COMES ON BEFORE THE WAKE AND RETURN START TIMES SO TH
33. PERATURE AVERAGING NETWORK CHECK WIRING OF SENSORS AND COMPARE TO SENSOR IS IN USE BUT SENSORS ARE NOT HOOKUP DRAWINGS CONFIGURED CORRECTLY SYSTEM PROBLEM E aa CHECK KEY TO VIEW FURTHER MESSAGES ON DISPLAY ae Y BETWEEN PC8900 AND W8900 CHECKCONNECTIONS2 3ONPC890 CONNECTIONS 2 3 ON PC8900 ae Y BE ESTABLISHED 1 DUE A PC8900 IS IN THE PROCESS OF NONE THE WAIT WILL DISAPPEAR IN A SHORT TIME 1 DUE A WITH THE W8900 M6193B SYMPTOM POSSIBLE CAUSE ACTION NO DISPLAY ON PC8900 NO POWER TO PC8900 CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT HEAT OR COOL SYSTEM POWER IS ON MAKE SURE PC8900 IS CORRECTLY MOUNTED ON WIRING WALLPLATE MAKE SURE TERMINALS 1 THROUGH 4 ARE PROPERLY CONNECTED BETWEEN PC8900 AND W8900 HEATING WILL NOT COME ON NO POWER TO W8900 CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT HEAT SYSTEM POWER IS ON CHECK FOR LOOSE CONNECTIONS AT PC8900 W8900 C7189 AND EQUIPMENT PC8900 SYSTEM SETTING IS INCORRECT CHECK THAT PC8900 IS SET TO HEAT EM HT OR AUTO 5 MINUTE COMPRESSOR PROTECTION IN HEAT PUMP APPLICATIONS THE PC8900 HAS A ACTIVATED 5 MINUTE BUILT IN TIME DELAY IF ACTIVATED ALLOW UP TO FIVE MINUTES AFTER CHANGING THE SETTING BEFORE THE COMPRESSOR STARTS PC8900 INOPERATIVE CONDUCT SELF TEST SEE CHECKOUT REFER TO MANUFACTURER SPECIFICATIONS TO TROUBLESHO
34. Proportional plus integral action eliminates droop by adjusting the on time of the stage until the control point matches the setpoint The PC8900A maintains the space temperature within 1 F of the setpoint when the temperature has stabilized after an energy saving period This zero droop performance provides improved occupant comfort and energy savings Occupants do not need to continually adjust thermostat settings to maintain desired temperature even during severe weather Remote Communications Adding the CM8900A Communications Module and the W8735B Telephone Access Module gives the PC8900A W8900A C remote communications Users are able to control current setpoint and system settings They can monitor the outdoor temperature humidity current setpoint system mode alarm out on High Low temperature filter status and equipment failure See separate instructions on CM8900A and W88735B for more detailed information Minimum Off Timing A minimum off timer in the Comfort Center control systeml assures that the cooling compressor or heat pump compressor does not come on again for at least five minutes after it turns off The minimum off timer is triggered when the compressor goes off and when the system switch is changed If the compressor turns off when the setpoint is changed then the minimum off timer is triggered The minimum off timer operates during the first stage of cooling on the W8900A and C The minimum off timer operates
35. QUIPMENT PC8900 AND W8900 GREEN LED ON W8900 IS NOT NO POWER W8900 CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND OPERATING REPLACE OR RESET IF NECESSARY CHECK THAT COOL SYSTEM POWER IS ON CHECK FOR LOOSE CONNECTIONS AT PC8900 W8900 C7189 OR EQUIPMENT PC8900 IS NOT CONFIGURED PROPERLY RECONFIGURE PC8900 FOR HUMIDITY CONTROL IN COOLING APPLIES TO W8900A B ONLY HUMIDITY SETTING IS TO HIGH ADJUST HUMIDITY SETTING USING Zw AND NZ KEYS EQUIPMENT COMPRESSOR PROTECTION ACTIVATED DEHUMIDIFICATION EQUIPMENT COOLING WILL NOT COME ON IN COOLING EQUIPMENT HAS A MINIMUM OFF TIME TO PROTECT THE COMPRESSOR IF ACTIVATED ALLOW UP TO FIVE MINUTES AFTER CHANGING THE SETTING BEFORE THE COMPRESSOR STARTS NO POWER TO DEHUMIDIFIER COOLING EQUIPMENT CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT EQUIPMENT POWER IS ON CHECK FOR LOOSE CONNECTIONS ON EQUIPMENT PC8900 AND W8900 PC8900 IS NOT CONFIGURED PROPERLY RECONFIGURE PC8900 FOR VNT OR OUTSIDE AIR DAMPER NO POWER TO VENTILATION EQUIPMENT VENTILATION EQUIPMENT WILL NOT COME ON CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT EQUIPMENT POWER IS ON CHECK FOR LOOSE CONNECTIONS AT PC8900 W8900 OR VENTILATION EQUIPMENT VENTILATION EQUIPMENT IS RUNNING INDEPENDENT OF PC8900 WHEN 2 SENSOR SENSES HIGH CO2 CONDITION SYSTEM FAN AND VENTILATI
36. R V S S1 Remote Air Temperature Sensor 1 Discharge Air Temperature Sensor W2b Stage 2 heat control compressor W2 H2 Y R4 Y1 W1 Compressor contactor RS Y1 W1 Compressor contactor Y M Y1 W1 Stage 1 cool control Y1 C1 M Y1 W1 Stage 1 heat control W1 H1 R3 Y2 Stage 2 cool control Y2 C2 None Clogged filter switch or common connection X X1 X2 C None Defrost P None HSII Control Panel L C H None LEDs A A1 A2 Z C L None LO and HI speed fan relays R1 R2 None Momentary circuit changeover Outdoor thermistor T A Out External temperature readout T relay a AUX controls the auxiliary heat like W2 and allows additional stages of auxiliary heat with outdoor thermostats while maintain ing the proper second stage anticipation For systems without 2nd stage heat configure W2 to No For systems requiring separate W1 and Y 1 terminals for proper heat pump operation refer to Fig 18 and 19 Replace existing sensor with C7089A Outdoor Sensor 68 0173 3 WIRING DIAGRAMS W8900A C Hookup Diagrams W8900A C C7189A REMOTE AIR COs MONMOR A TEMPERATURE SENSOR C7100 DISCHARGE AIR TEMPERATURE SENSOR PC8900 C7089A OUTDOOR AIR TEMPERATURE SENSOR FAN RELAY STAGE 2 COOL RELAY SOOO S STAGE 1 COOL RELAY TRANSFORMER STAGE 1 HUMIDIFIER HEAT RELAY OR DEHUMIDIFIER EQUIPMENT STAGE 2 HEAT RELAY PM Lou QW e COOLING TRANSF
37. RCURY NOTICE If this control is replacing a control that contains mercury in a sealed tube do not place your old control in the trash Contact your local waste management authority for instructions regarding recycling and the proper disposal of this control or of an old control containing mercury in a sealed tube If you have questions call Honeywell Inc at 1 800 468 1502 Monday through Friday 7 00 a m to 5 30 p m Central time INSTALLATION Whe 1 n Installing this Product Read these instructions carefully Failure to follow instructions can damage the product or cause a hazardous condition Check the ratings on the product to make sure the product is suitable for your application Installer must be a trained experienced service technician After completing installation use these instructions to check out product operation 68 0173 3 N CAUTION Disconnect power supply before wiring to prevent electrical shock or equipment damage Mounting the W8900A C Remote Module Locate the W8900A C in the equipment room near the HVAC equipment See Fig 8 N CAUTION Do not mount the W8900A C inside any HVAC equipment Mounting the W8900A C inside HVAC equipment can cause damage to the W8900A C 1 Grasp the top edge of the W8900A C cover either at thecenterorboth corners and pullitofffromthe base 2 Locate the four mounting holes See Fig 9 3 Position the W8900A C on wall or cold air return Leve
38. SYSTEM until desired setting HEAT OFF COOL AUTO EM HEAT is displayed SYSTEM SYSTEM LLL HEAT The Comfort Center program controls the heating system OFF Both the heating and cooling systems are off OFF flashes in the display COOL The Comfort Center program controls the cooling system AUTO The Comfort Center program automatically changes between heating and cooling depending on the indoor temperature AUTO must be configured by the installer EM HEAT Select Models Only The Comfort Center program controls only the emergency heat 11 Programming Humidity Setting a Press HUMIDITY The display shows HUMID with a percentage HUMIDITY b Press and hold the up or down arrowhead key until desired humidity setting is displayed The available choices range from 10 to 80 percent in 5 percent increments 12 Programming Frost Setting If Applicable a Press HUMIDITY a second time and the display shows FROST HUMIDITY NOTE The factory setting is 5 but the range is 0 to 10 When there is too much condensation lower the number but if the air is dry change the setting to a higher number b Press up or down arrowhead key until the desired setting is displayed 68 0173 3 30 c Press RUN to exit the program mode o t MON The Comfort Center program is now customized RUN M6230 Operating the Comfort Center
39. T IS TOO HIGH ADJUST SETPOINT USING Zw AND XZ KEYS ROOM TEMPERATURE AT REMOTE RELOCATE REMOTE SENSOR WHERE IT IS NOT AFFECTED SENSOR LOCATION IS TOO LOW BY HOT AREAS COLD AREAS OR DEAD AIR AREAS PC8900 CONFIGURED FOR ONLY ONE RECONFIGURE PC8900 TO ACCOMMODATE ALL STAGES OF STAGE OF COOLING COOLING SYSTEM FAN IS RUNNING PC8900 FAN SETTING IS SET AT CIRCULATING FAN FEATURE ALLOWS FAN TO OPERATE INDEPENDENT OF HEATING FAN CIRC INDEPENDENT OF HEATING OR COOLING EQUIPMENT OR COOLING EQUIPMENT REFER TO OPERATION SECTION PC8900 IS CONFIGURED FOR ELECTRIC RECONFIGURE PC8900 FOR NO ELECTRIC HEAT FAN HEAT FAN OPERATION PC8900 IS CONFIGURED FOR OVERRUN RECONFIGURE PC8900 FOR NO FAN OVERRUN IN COOLING IN COOLING M18743 Fig 41 Troubleshooting procedures Continued 68 0173 3 42 SYMPTOM POSSIBLE CAUSE ACTION HUMIDIFICATION EQUIPMENT PC8900 IS NOT CONFIGURED PROPERLY RECONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING WILL NOT COME ON IN APPLIES TO W8900A B ONLY HEATING HUMIDITY SETTING IS TO LOW ADJUST HUMIDITY SETTING USING ZA AND NZ KEYS PC8900 IS CONFIGURED FOR FROST TO PREVENT FROST FROM FORMING ON WINDOWS SOME CONTROL CALLS FOR HUMIDIFICATION WILL NOT BE ALLOWED REFER TO INSTALLATION AND OPERATION SECTION NO POWER TO HUMIDIFIER CHECK SYSTEM FUSE OR CIRCUIT BREAKER AND REPLACE OR RESET IF NECESSARY CHECK THAT EQUIPMENT POWER IS ON CHECK FOR LOOSE CONNECTIONS ON E
40. Typical location for C7189A Remote Sensor C7189A must be mounted in living space and not in return air duct Wiring the C7189A Remote Sensor if needed N CAUTION Failure to follow these wiring practices can introduce electrical interference noise which can cause erratic system operation Keep wiring at least one foot away from large inductive loads such as motors line starters lightning ballasts and large power distribution panels Use shielded cable to reduce interference if rerouting wire is not possible Ground the shielded cable to the ground terminal on the W8900A C IMPORTANT Erratic temperature readings from a sensor can occur as a result of any of the wiring practices described below These practices must be avoided to assure proper operation Use shielded cable to reduce interference if rerouting of sensor wiring is not possible Do not route temperature sensor wiring with building power wiring next to control contactors or near light dimming circuits electric motors or welding equip ment Avoid poor wiring connections Avoid intermittent or missing building earth ground 21 N CAUTION Disconnect power supply before connecting to wiring to prevent electrical shock or equipment damage Wiring must comply with applicable codes ordinances and regulations 1 Wire the C7189A Remote Indoor Sensor to the W8900A C Remote Module terminals S1 and S For an example of general wiring of the C71
41. Ut M6243 d Press FAN for desired fan setting and VENTILATE for desired ventilation setting during hold FAN AUTO ON CIRC HEAT SETPT COOL FAN mige m O Ct o M6244 HEAT SETPT COOL FAN c LA m VENTI gs 3 a nd M6245 NOTE To cancel steps 5a through 5d press the CANCEL key 68 0173 3 Canceling Program Settings Each period can be canceled 6 Canceling Period a Press DAY until the desired day appears in the dis b Press and hold SELECT PERIOD until the desired period to cancel for that day appears in the display RETURN M6250 c Press CANCEL The time and temperature disap pears from the display HEATSETPT COOL MON RETURN M6251 TTo to 0 MON RUN M6230 Review Program Settings and Current Readings 1 Review All of Program Settings IMPORTANT Changes can be made to the program when using this review process Press SELECT PERIOD to enter the program HEAT SETPT COOL Fro Ore 710 Da UL Uu MON WAKE M6234 Press DAY for each day of the week and press SELECT PERIOD to review each period The display shows the day period time temperature setpoints fan and vent settings HEAT SETPT COOL TM o O 6t SAT WAKE M6235 109170070 Ot MON RU
42. as caused by concealed pipes or ducts Drafts from windows doors fireplaces or other heat cool sources Convection or radiant heat from the sun or electrical equipment Unheated areas on the other side of the wall location Dead air areas behind doors furniture curtains or in corners and alcoves Mounting 1 Mark the mounting location on the wall for the C7189A Remote Indoor Sensor or junction box NOTE Order 202689A Coverplate when C7189A can not cover wall marks from old thermostat 68 0173 3 20 Run cable from the W8900A C Remote Module to a hole at the selected wall location Pull approximately three inches of wire through the opening Color coded 18 gauge thermostat wire is recommended W8900 e 2 e A NOTE WHICH COLOR WIRE IS ATTACHED TO EACH TERMINAL A FOUR WIRES ARE REQUIRED FOR PROPER OPERATION IF FEWER THAN FOUR ARE AVAILABLE ADDITIONAL WIRES MUST BE RUN TO PC8900 LOCATION IF MORE THAN FOUR ARE AVAILABLE TAPE OFF UNUSED WIRES A IF SHIELDED CABLE IS REQUIRED GROUND TO GND TERMINAL ON W8900 A IN REPLACEMENT APPLICATIONS PC8900 REPLACES OLD THERMOSTATS HUMIDISTATS VENTILATION CONTROLS AND AIR CLEANER INDICATORS BE SURE TO REMOVE OLD DEVICES AND TAPE OFF UNUSED WIRES M75149 Fig 24 Wiring diagram for PC8900A Control Panel to W8900A C Remote Module 5 FEET 1 5 METERS Fig 25
43. d W8900 CANNOT READ DISCHARGE CHECK CONNECTIONS BETWEEN C7100 AND W8900 zd EM A AIR TEMPERATURE PC8900 CONFIGURED FOR DISCHARGE RECONFIGURE PC8900 AIR TEMPERATURE SENSOR BUT NOT INSTALLED WRONG DISCHARGE AIR SENSOR IS CHECK THAT C7100 AVERAGING DISCHARGE AIR SENSOR IS INSTALLED BEING USED PC8900 HUMIDITY SENSOR IS REPLACE PC8900 INOPERATIVE PC8900 TEMPERATURE SENSOR HAS REPLACE PC8900 FAILED RECONFIGURE PC8900 FOR REMOTE SENSOR USE F THE COMM CHK LIGHT IS CAUSED BY HEAVY COMMUNICATION FROM THE CM8900 IT DISAPPEARS IN 5 SECONDS NO ACTION IS NEEDED M6193B Fig 41 Troubleshooting procedures 68 0173 3 40 IF THE CHECK LED IS LIT USE THE FOLLOWING TROUBLESHOOTING INFORMATION 1 PRESS THE CHECK KEY PC8900 DISPLAY SHOWS POSSIBLE CAUSE ACTION DU ETE Mn adis CANNOT READ OUTDOOR AIR CHECK CONNECTIONS BETWEEN C7089 AND W8900 CONNECTIONS BETWEEN C7089 AND W8900 ETE Mn adis PC8900 CONFIGURED FOR OUTDOOR RECONFIGURE PC8900 FOR LOCAL SENSOR ONLY TEMPERATURE SENSOR BUT NOT INSTALLED WRONG OUTDOOR TEMPERATURE CHECK THAT C7089 OUTDOOR TEMPERATURE SENSOR IS SENSOR IS INSTALLED BEING USED I PC TEMPERATURE CHECK CONNECTIONS BETWEEN C7189 AND W8900 PC8900 CONFIGURED FOR REMOTE RECONFIGURE PC8900 SENSOR OPERATION BUT C7189 IS NOT INSTALLED WRONG REMOTE SENSOR IS CHECK THAT C7189 REMOTE TEMPERATURE SENSOR IS INSTALLED BEING USED TEM
44. e C7100A senses the air tem perature in the discharge and if the temperature is not acceptable for the heating or cooling setting the Comfort Center control system lights the check LED and presents a 68 0173 3 38 Check message See Fig 39 for the resistance vs tempera ture characteristics for the C7100A Discharge Air Temperature Sensor The discharge air temperature is displayed on the PC8900A when the Check key is pressed If the PC8900A is configured for a discharge air temperature but the discharge air tempera ture is not displayed then a power outage has cleared the discharge air temperature reading from the Check feature To re establish the discharge air temperature enter the installer setup mode for a few seconds After the RUN key is pressed the discharge air temperature is displayed when the CHECK key is pressed until another power outage occurs NOTE When a discharge air temperature sensor is installed and configured in an application we recommend interrupting the power supply briefly before leaving the site This removes the discharge air temperature from the display when the CHECK key is pressed and avoids confusion C7189A Remote Indoor Temperature Sensor The C7189A Wall Mount Temperature Sensor provides the input required by the Comfort Center control system to sense the indoor air space temperature See Fig 40 for the resistance vs temperature characteristics for the C7189A Remote Indoor Temperature S
45. e Check LED is lighted troubleshooting messages are displayed Refer to Fig 41 for flowchart of troubleshooting messages 46 7 8 2131 to 2094 48 8 9 2094 to 2057 50 10 0 2057 to 2019 52 11 1 2019 to 1982 54 12 2 1982 to 1945 56 13 3 1945 to 1908 58 14 4 1908 to 1871 60 15 6 1871 to 1833 62 16 7 1833 to 1796 64 17 8 1796 to 1759 66 18 9 1759 to 1722 68 20 0 1722 to 1685 70 21 1 1685 to 1647 72 22 2 1647 to 1610 74 23 3 1610 to 1573 76 24 4 1573 to 1536 78 25 6 1536 to 1499 80 26 7 1499 to 1461 82 27 8 1461 to 1424 84 28 9 1424 to 1387 86 30 0 1387 to 1350 88 31 1 1350 to 1313 90 32 2 1313 to 1275 1 92 33 3 1275 to 1238 100 F 94 34 4 1238 to 1201 38 C 96 35 6 98 36 7 1164 to 1127 100 37 8 1127 to 1089 M6357 1201 to 1164 Fig 40 C7189A Remote Temperature Sensor resistance vs temperature performance characteristics 39 68 0173 3 TROUBLESHOOTING See Fig 41 for troubleshooting procedures IF THE CHECK LED IS LIT USE THE FOLLOWING TROUBLESHOOTING INFORMATION 1 PRESS THE CHECK KEY PC8900 DISPLAY SHOWS POSSIBLE CAUSE ACTION COMMUNICATIONS WITH THE HOME CHECK CONNECTIONS BETWEEN HOME SYSTEM AND SYSTEM AND W8900 CANNOT COMMUNICATION MODULE BE ESTABLISHED CHECK COMMUNICATIONS BUS RECONFIGURE PC8900 CONNECTION BETWEEN PC8900 AND RECONFIGURE PC8900 W8900 CANNOT BE ESTABLISHED DISCHARGE AIR SENSOR IS PRESENT CHECK CONNECTIONS B
46. econds for the ventilation to start after the request is made When the Comfort Center program is configured for no ventilation the system fan is activated in response to a call for ventilation When the Comfort Center system is configured for a VNT damper calls for ventilation close the VNT damper contacts and activate the system fan NOTE Each period can have a ventilation program 37 Humidity Control W8900A and B IMPORTANT The humidity configuration can only be set for heat or cool by the installer If configured for both the Comfort Center control system ignores both set tings and no humidity control is activated Heat Mode Heat humidification is activated when the sensed RH is below the setpoint RH and the fan is on When a ventilator is installed and configured and the RH is above the setpoint the Comfort Center program calls for ventilation to lower the humidity Cool Mode Cool dehumidification is activated when the sensed RH is above the setpoint This can cause overcooling see W8900C Humidity Control section Dehumidification equipment can be controlled in many ways See Installation section for hookup drawings Humidity Control with Fan Select models of the W8900A C can be configured to control humidity levels while the fan is energized This type of humidity control does not require the heat output to be energized In order for the humidity terminals HUM to energize the following condi
47. ee Fig 36 through 38 68 0173 3 Heat Pump Recovery In Mild Weather When outdoor temperature is mild for example 50 F 10 C the recovery from energy savings is handled completely by the heat pump without the need for auxiliary heat The heat pump starts only after the setpoint has risen above the sensed temperature and is locked on until the comfort setpoint is reached See Fig 36 COMPRESSOR SETPOINT AUXILIARY HEAT SETPOINT ROOM TEMPERATURE WAKE ON cowesson JS ON AUXILIARY HEAT a OFF M6187 Fig 36 Adaptive Intelligent Recovery ramp for a heat pump in mild weather 50 F In Moderate Weather When outdoor temperature is close to the balance point of the heat pump the heat pump runs continuously during the recovery period and auxiliary heat cycles if necessary See Fig 37 e COMPRESSOR SETPOINT AUXILIARY HEAT SETPOINT ROOM TEMPERATURE WAKE ON COMPRESSOR U U U Pes ON AUXILIARY HEAT OFF M6188 Fig 37 Adaptive Intelligent Recovery T ramp for a heat pump in moderate weather 20 F In Severe Weather When the outdoor temperature is below the balance point of the heat pump the heat pump and auxiliary heat run continuously in the recovery period See Fig 38 68 0173 3 36 COMPRESSOR SETPOINT AUXILIARY HEAT SETPOINT ROOM TEMPERATURE WAKE ON COMPRESSOR OFF HEAT OFF M618
48. em 11 68 0173 3 W8900A C C7189A REMOTE AIR A a TEMPERATURE SENSOR ZN cmoo DISCHARGE AIR QA J TEMPERATURE SENSOR AN czossa OUTDOOR AIR QJ TEMPERATURE SENSOR PC8900 7 2 2Q nd 30 4Q gt HUMIDIFIER OR DEHUMIDIFIER EQUIPMENT ZONE 2 THERMOSTAT ZONE 3 THERMOSTAT ZONE 4 THERMOSTAT L 4 _ R8239A1052 a R8222B1067 R8222B1067 R8222B1067 Ea EE ix A n led len les E ZONE 1 ZONE 2 ZONE 3 ZONE 4 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED JUMPER R TO RH TO RC FOR SINGLE TRANSFORMER APPLICATIONS DURING INSTALLER SETUP CONFIGURE PC8900 FOR HUMIDITY CONTROL IN HEATING MODE HUMIDIFIER OR COOLING MODE DEHUMIDIFIER W8900 ALLOWS CONNECTION OF A CO MONITOR WITH UNCOMMITTED CONTACTS USE ONE R8239 FOR EVERY FOUR ZONES USE FOR 3 WIRE ZONE VALVE OR DAMPERS ZONES 2 3 4 CAN BE CONTROLLED BY ADDITIONAL PC8900 W8900 OR OTHER THERMOSTATS SEE VENTILATION INSTRUCTIONS FOR WIRING GROUNDING THE GND TERMINAL IS NOT RECOMMENDED PERBERE PERE CONNECTION FOR CM8900A REMOTE COMMUNICATIONS MODULE M4491D Fig 14 Hookup diagram for 3 wire zone valves in Series 20 heating system with zone controls 68 0173 3 12 W8900A C C7189A REMOTE AIR MONM OR A TEMPERATURE SENSOR C7100 DISCHARGE AIR TEMPERATURE SENSOR PC8900 C7089A OUTDOOR AIR TEMPERATURE SENSOR FAN RELAY HOT SYSTEM TRANSFORMER COOL RELAY HUMIDIFIER
49. en PC8900A calls for heat fan is energized by equipment Conventional I 1 80 second fan overrun after PC8900A WILLEN I3L0N lends call for cooling Option not used on the W8900B model PROGRAMMING PC8900A The Comfort Center control panel must have 24 Vac to program The current day and time need to be set This activates the preprogram in the Comfort Center panel See Table 8 for the preprogram settings Table 8 PC8900A Preprogram Heating Cooling Fan Vent Period Start Time Temp Temp Setting Setting Saturday WAKE 6 00 AM 70 F 78 F AUTO OFF LEAVE 8 00 AM 62 F 85 F AUTO OFF RETURN 6 00 PM 70 F 78 F AUTO OFF SLEEP 10 00 PM 62 F 82 F AUTO OFF 27 Setting the Current Day and Time NOTES Always press the keys with a fingertip or similar blunt tool Sharp instruments like a pen or pencil point can damage the keyboard Check the Glossary section for definitions of unfamiliar words 1 Press SET CLOCK The display shows a time and day 2 Press and hold DAY until the current day appears in the display 3 Press and hold a TIME key until the current time appears in the display Be sure AM or PM appear as desired 4 Press RUN to exit the SET CLOCK program mode 68 0173 3 The current day and time are now programmed The preprogrammed schedule is activated The preprogrammed sett
50. ensor At a remote location the C7189A can also average temperature in several ways PC8900A and one C7189A e Four or nine C7189As in series parallel networks PC8900A and a C7189A network four or nine sensors NOTE The remote temperature or temperature averaging network temperature is displayed on the PC8900A with the Time Day and Mode of operation Pressing the CHECK key does not display the remote temper ature separately 2300 2200 2100 2000 1900 1800 1700 1600 OHM RESISTANCE gt 1500 1400 1300 1200 1000 L 1 1 1 1 40 50 60 70 80 90 4 10 16 21 27 32 TEMPERATURE A RESISTANCE DECREASES 18 6 OHMS PER 1 F CHANGE OR 33 4 OHMS PER 1 C CHANGE Keypad Lockout The keypad lockout feature allows temporary settings to be made but the installer setup and program settings can not be changed This feature gives the PC8900A the security of a locking cover with flexibility to meet the user s schedule To activate keypad lockout press and hold RUN until LOCK KEY shows on the display approximately three seconds To deactivate keypad lockout press and hold RUN until OPEN KEY shows on the display CHECK Key Press the PC8900A CHECK key to display the following information Outdoor temperature if C7089A installed Humidity level in room Discharge air temperature if C7100A installed Heating and cooling setpoints Fan setting Ventilation setting System setting If th
51. er using separate transformers for humidity control in the heating mode Mounting the PC8900A Control Panel NOTE The following location guidelines apply only if a remote sensor is not part of the installation If a remote sensor is installed the PC8900A can be installed in any convenient location with these guide 68 0173 3 18 lines applying to the location of the sensor If a remote sensor is used humidity is only measured at the PC8900A location Location Guidelines Choose a location for the PC8900A where it is safe from tampering Locate the PC8900A on an inside wall about 5 ft 1 5m above the floor The PC8900A can also be mounted horizontally on a standard 2 x 4 in 51 x 102 mm outlet box The wire distance between the PC8900A and W8900A C should not exceed 200 ft Install the PC8900A in an area with good air circulation at average temperature Avoid the following locations because they can introduce errors in temperature measurements Hot or cold areas caused by concealed pipes or ducts Drafts from windows doors fireplaces or other heat cool sources Convection or radiant heat from the sun or electrical equipment Unheated areas on the other side of the wall location Dead air areas behind doors furniture curtains or in corners and alcoves Mounting NOTE 1 Markthe mounting location on the wall for the PC8900A or outlet box 2 Run cable from the unit to a hole
52. g Uses reheat See Operation section ORDERING INFORMATION When purchasing replacement and modernization products from your TRADELINE wholesaler or distributor refer to the TRADELINE Catalog or price sheets for complete ordering number If you have additional questions need further information or would like to comment on our products or services please write or phone 1 Your local Home and Building Control Sales Office check white pages of your phone directory 2 Home and Building Control Customer Relations Honeywell 1885 Douglas Drive North Minneapolis Minnesota 55422 4386 800 328 5111 In Canada Honeywell Limited Honeywell Limit e 35 Dynamic Drive Scarborough Ontario M1V 4Z9 International Sales and Service Offices in all principal cities of the world Manufacturing in Australia Canada Finland France Germany Japan Mexico Netherlands Spain Taiwan United Kingdom U S A 68 0173 3 2 Finish C7189A Wall Mount Remote Indoor Sensor Premier White amp color PC8900A Control Panel Premier White color W8900A C Remote Module Charcoal gray color Clock Accuracy 1 minute per month Approvals FCC Class B Pending NEMA DC 3 Not required Batteries No batteries required During power outages time is retained for six hours All programmed setpoints and times are retained indefinitely Resistance Characteristics of Sensors C7089A Outdoor Sensor PTC Sensor See Fig 39 in the Opera
53. ielded cable to reduce inter ference if rerouting of sensor wiring is not possible These practices must be avoided to assure proper operation Do not route temperature sensor wiring with building power wiring next to control contactors or near light dimming circuits electric motors or welding equipment Avoid poor wiring connections Avoid intermittent or missing building earth ground 68 0173 3 N CAUTION Disconnect power supply before connecting the wiring to prevent electrical shock or equipment damage Wiring must comply with applicable codes ordinances and regulations 1 Wire the C7089A Outdoor Sensor to the terminals marked OUT on the W8900A C Remote Module If the leadwire provided with the C7089A is not long enough run cable to a hole at the selected C7089A location Color coded 18 gauge thermostat wire is recom mended Refer to Fig 28 for an example of general wir ing for the C7089A Pigtail wiring can be used 2 Mount the C7089A in its mounting clip 3 Plug wiring hole using nonhardening caulk or putty Mounting the C7100A Discharge Air Sensor if needed Location Guidelines Locate the C7100A Discharge Air Sensor in the air duct or plenum where it can sample an average air temperature Avoid locations where air stratification can cause sensor errors The distance between the C7100A and W8900A C should not exceed 200 ft Mounting TO MOUNT ON A FLAT DUCT OR PLENUM SURFACE
54. imately three seconds The display returns to normal when RUN is no longer pressed 2 To change the setting press RUN a second time until the other display appears CHECKOUT N CAUTION Do not operate the cooling system when outside temperature is below 50 F 10 C See compressor manufacturer instructions for further information IMPORTANT e W8900A C must have ac power to perform self test Five minute time delay on compressor does not function during checkout Perform the following test as a check of all the W8900A C functions f W8900A C does not respond as indicated replace the W8900A C Checkout is activated from the W8900A C Remote Module The PC8900A Control Panel does not have to be connected to use the checkout If the PC8900A is connected the PC8900A displays Wait during checkout NOTE The W8900A C and PC8900A if connected returns to normal when the checkout is interrupted for two minutes 1 Start the checkout by disconnecting sensor wires from S S1 T and T1 if attached Connect a jumper between S and 51 terminals Connect a jumper between T and T1 terminals Turn the power off and on The LED should be on Fol low the steps in Table 9 or 10 BON NOTE The sequence restarts after the last step in the table 5 After completing the steps in the table remove the T to T1 and S to S1 jumpers and reinstall the sensor wires if applicable The W8900A C LED blinks Table 9 Conventional Sy
55. ing to prevent electrical shock or equipment damage All wiring must comply with all applicable electrical codes ordinances and regulations 1 Loosen the PC8900A terminal screws and insert one wire beneath each terminal 1 2 3 4 Four wires are required at the PC8900A to assure operation Note the color of the wire that is attached to each terminal num ber to later match the colors with the terminals on the W8900A C Remote Module See Fig 10 and 24 for wir ing technique and wiring diagram 2 Tighten screw terminals securely 3 Push the excess wire back into the hole Plug the hole with nonhardening caulk putty or insulation to prevent drafts from affecting PC8900A operation IMPORTANT In replacement applications more than four wires can be available In these applications tape off the unused wires at the PC8900A location and the W8900A C location Mounting the C7189A Remote Sensor if needed Location Guidelines Choose a location where the C7189A is safe from tampering Locate the C7189A on an inside wall about 5 ft 1 5m above the floor The C7189A can also be mounted vertically on a standard 2 x 4 in 51 x 102 mm outlet box The wire distance between the C7189A and W8900A C should not exceed 200 ft Install the C7189A in an area with good air circulation at average temperature Avoid the following locations because they can introduce errors in sensor measurements see Fig 25 Hot or cold are
56. ings can be customized or cleared When using the preprogrammed settings as is programming is done To customize or create a new program follow the steps in the Setting a Customized Program section Operating the Comfort Center section shows how to make any temporary changes Setting a Customized Program Planning your Program Plan a schedule before programming Leave any period blank when no setting is required When an outdoor sensor is part of the system enter a frost setting The humidity and frost settings are the same for the entire program Programming the First Day When changing the existing program go to step 7a When clearing the program and starting over proceed as follows NOTE Press the RUN key at any time to exit the program ming mode 1 Clearing Current Program a Press SELECT PERIOD SELECT PERIOD M6206 b Hold CANCEL until display shows PROG CLR HEAT SETPT COOL CANCEL 2 Setting Day Time and Setpoints a Press SELECT PERIOD until display shows WAKE HEAT SET PT COOL o o MON WAKE M6206 HEAT SETPT COOL o o MON WAKE M6207 c When display reads COOL SET PT press HEAT COOL SETPOINTS to switch to HEAT SET PT HEAT SETPT COOL TO ane o 0 d Press and hold a TIME key until the display shows the desired starting time The time changes in ten minute increments 6215 68 0173 3 28 e Press and hold the
57. l the W8900A C for appearance only the device will function properly even when not level Use a pencil to mark the mounting holes on the wall W8900 MJ FURNACE OR BOILER WATER HEATER M4459 Fig 8 W8900A C location example 4 Remove the W8900A C from the wall and drill 3 16 in holes in the wall if drywall as marked For firmer mate rial such as plaster or wood drill 7 32 in holes Gently tap anchors provided into drilled holes until flush with the wall 5 Reposition the W8900A C over the holes Loosely insert the four mounting screws included into the holes 68 0173 3 6 MOUNTING HOLES 7 NNN NN NNN NNN NNN MOUNTING SCREWS 4 Fig 9 Mounting W8900A C Remote Module M4463 Wiring the W8900A C to the HVAC Equipment N CAUTION Disconnect power supply before connecting wiring to prevent electrical shock or equipment damage Wiring must comply with applicable codes ordinances and regulations IN REPLACEMENT INSTALLATION 1 2 3 4 Locate the terminal wiring strip on the old thermostat Note the wire color for each wiring terminal used Remove the wires connected to the old thermostat and other controls Tape off unused wires Use Table 2 or 3 to identify the W8900A C terminal labels Connect the same loads that were connected to the old thermostat to the W8900A C Remote Module with a new bundle of 18 gauge color coded thermostat
58. nd outdoor sensors TO ENTER THE INSTALLER SETUP MODE 1 Hold the PC8900A CHECK key until all display seg ments are displayed approximately three seconds See Fig 29 2 Press the up and down arrowhead keys at the same time The display goes blank except for up to four seg ments SYSTEM HEAT COOL FAN as shown in Fig 30 One of these segments flashes The flashing segment indicates the current menu selection TO CHANGE TO ANOTHER SELECTION 1 Press the up or down arrowhead key until the desired segment is flashing 2 Once the desired segment is flashing press the CHECK key for options within that segment The options are SYSTEM HEAT COOL and FAN 3 Press RUN to exit the installer setup System Options When SYSTEM is flashing the following list of options pertaining to the equipment and sensors connected to the system appears on the PC8900A display To make each selection press the CHECK key See Table 4 for setting options Fig 29 All segments on display Table 4 System Setting Options SYSTEM OFF AUTO WOTE N NIP 79 17 PI Pos DIOS ES UTILICE SUN MON TUE WED THU FRI SAT WAKELEAVERETURNSLEEP TEMPORARY VENT AUXHEAT SETPT COOL SETPT FAN M6360 Other Choices Press Up or Down Arrowhead setting for heat pumps with heating changeover Factory Setting Description Keys to Change Description Dua TE PHOT NI System switch is c
59. nding equipment life Adaptive Intelligent Recovery operation is used during recovery from energy savings It is bypassed when configured for conventional recovery but not when setpoint is temporarily changed When Adaptive Intelligent Recovery operation is bypassed the system operates the stages of equipment like a conventional control PC8900A Used with W8900A C Remote Module Conventional Heat Cool Applications During recovery the Comfort Center program calculates the amount of time required to bring the living space from the current room temperature achieved in the energy savings mode to the comfort temperature programmed for the comfort mode When that time is reached the present setpoint changes from the energy savings setpoint to the comfort setpoint The result is that the living space temperature is at the programmed setpoint at the programmed time providing the occupants with the maximum comfort See Fig 33 PC8900A Used with W8900B Remote Module Heat Pump Applications During recovery the Comfort Center program works to achieve comfort in the same manner by calculating the amount of time required to bring the living space from the current room temperature to the comfort temperature programmed for the comfort mode The living space temperature reaches the programmed setpoint at the programmed time so the occupants achieve maximum comfort Another way the Comfort Center program minimizes auxiliary heat
60. note b Heat Pump Contactor P T T1 Discharge Air Temperature Sensor W1 Heating Relay W1 Stage 1 Heat Relay W1 W2 Stage 2 Heat Relay W2 Y1 Cooling Relay Y Y1 Stage 1 Cool Relay Y1 Y2 Stage 2 Cool Relay Y2 See note c Fan Control Honeywell dual fuel thermostat T834 1 See note c Fan Control Honeywell dual fuel thermostat T834 2 See note d Filter Light X none Remote Timer Contacts Z PC8900A W8900A C are not compatible with evaporative cooling equipment In single stage heat pump applications jumper W1 and Y1 and connect to Y Configure the system for Auto Fan in Heat Dual fuel fan feature configured in installer setup 4 Filter light feature available in PC8900A fan accumulation timer feature 7 68 0173 3 Table 3 Heat Pump Applications W8900B W8900B Terminal Existing Thermostat Designations Existing Thermostat Designations Designations Function Standard Customer Specials 1 PC8900A Control Panel 2 PC8900A Control Panel 3 PC8900A Control Panel 4 PC8900A Control Panel AUX Stage 3 heat control strip heat W3 B Heating changeover valve B C 24 Vac transformer common C X B CO Carbon dioxide monitor E Emergency heat relay E K VNT VNT relay G Fan relay G F GND Ground L System monitor L L Cooling changeover valve R R 24 Vac system transformer
61. onfigured for moore maar a System switch is configured for automatic rit tit CAT a 1N manual changeover HEAT OFF rut tht 1T 21 T changeover HEAT OFF COOL AUTO or CMM id COOL or EM HT HEAT OFF COOL wx EM HT HEAT OFF COOL AUTO M6361 n Five minute compressor protection is moa No compressor protection exists Calls for HU rhe FO I Li NC Pil pr I ye daw LIF q on calls for cooling heat pump yt tia LIF F7 px cooling heat pump can occur wsz followed by a five minute enforced mease Immediately shutdown Fu System does not have a C7189A ocr rm Li System does have a C7189A Remote SE J Remote Indoor Sensor FNL E Indoor Sensor M6363 M6377 I7 System does not have a C7100A Crooner tty cl 1 System does have a C7100A Discharge LU Nc Lt Discharge Air Sensor I IMI 4I q T Air Sensor M6364 M6378 mem NUT a rar System uses PC8900A temperature Se System uses C7189A Remote Indoor 12 0 LLL T Jonly If the system is configured fora NJE 1 Sensor only Be sure the system is meses remote sensor SENS REM Y za cr TIO configured for remote sensor temperature control is averaged SENS REM Y between C7189A Remote Indoor Sensor and PC8900A Control Panel TET NUT NI System does not have a C7089A EE 07 JH 40 T wy System does have a C7089A Outdoor TIED I N LILI P gw Outdoor Sensor a IA LA
62. performance can be expected if those conditions are changed Models The PC8900A Comfort Center Control Panel mounts in the living space and accurately measures and controls room temperature and humidity The W8900A C Remote Module provides a wiring panel and switching for the Perfect Climate Comfort Center Control System See Table 1 System Components and Accessories See Fig 1 C7089A1002 Outdoor Sensor Used to measure outdoor tem perature C7100A1015 Discharge Air Sensor Used to sense tempera ture in discharge or return air C7189A1001 Remote Indoor Sensor Used for remote sensor applications CM8900A1009 Communication Module Used for remote communication W8735B1003 Telephone Access Module Used for remote communication 202689A Mounting Plate Accessory Used when C7189A Remote Indoor Sensor cannot cover wall marks from old thermostat 205224A Wall Cover Plate Used when PC8900A Control Panel cannot cover wall marks from old thermostat 32007496 001 Replacement Door Used for PC8900A Control Panel Dimensions 205224A See Fig 2 C7089A See Fig 3 C7100A See Fig 4 C7189A See Fig 5 PC8900A See Fig 6 W8900A C See Fig 7 Operating Ambient Temperature Range NOTES System is capable of turning on heat at 0 F 18 C7089A 40 to 128 F 40 to 53 C7100A 40 to 150 F 4 to 66 C C7189A 40 to 95 F 4 to 35 C PC8900A 40 to 110 F 4 to 43 C W8900A C 40
63. pump three cycles per hour at 50 percent load The cycle requirements for each stage of heat can be changed to match the type of heating system used See Table 5 for the cycle rate options available and the equipment that corresponds with each cycle rate Cool Options When COOL is flashing see Table 6 for options for the cooling equipment stages that appear in the display in the following order after each press of the CHECK key Table 6 Cooling Cycle Rates Cycles per Display Shows Hour System Setting Stage 1 Stage 2 Recommended 3 Y1 CPH 3 Y2 CPH 3 setting factory factory setting setting N Aa Y1 CPH 9 Y2 CPH 9 N A Y1 CPH 6 Y2 CPH 6 Natural gas air Y1 CPH 1 Y2 CPH 1 conditioning Heating only Not Y1CPHNC 2 NC application connected N A 4 5 Y1CPH4 5 2 4 5 N A 2 5 1 25 Y2CPH2 5 N A 2 Y1 CPH2 Y2 CPH 2 N A 1 5 Y1CPH 1 5 Y2 1 5 Use these cycle rate settings if faster or slower cycling is required Fan Options When FAN is flashing refer to Table 7 for the options pertaining to the fan equipment that appear in the display in the following order after each press of the CHECK key Table 7 Fan Setting Options Display Description When PC8900A calls for heat PC8900A also calls for fan Electric Heat No fan overrun in cooling Other Choices Press Up or Down Arrowhead Keys to Change Description r n Wh
64. rgizes with cooling Factory setting is for O B to energize with a call for heat O B is energized based on installer setup or configuration Installer Display of all Segments and Product Codes Optional 1 Press and hold CHECK key until all segments of the dis play are lighted See Fig 31 2 Press the CHECK key four more times to view each of the following items Order specification number of the Comfort Center control system Manufacturing date code and software revision numbers of the Comfort Center control system Order specification number of the remote module Manufacturing date code and software revision numbers of the remote module 3 Press the CHECK key to return to normal operation SYSTEM OFF AUTO AUXHEAT SETPT COOL SETPT FAN 5 NTI SIG RCU TE SE on JINN ANC EIN SUN MON TUE WED THU FRI SAT WAKELEAVERETURNSLEEP TEMPORARY VENT Honeywell M6400 Fig 31 All segments on display 68 0173 3 34 OPERATION The PC8900A C7089A C7189A C7100A and CO monitor sense the temperature humidity and CO conditions in the living space This information is then transferred to the W8900A C Remote Module which activates the proper equipment based on the programmed settings Conventional vs Adaptive Intelligent Recovery Operation Conventional Recovery Conventional temperature recovery starts the heating or cooling system at the programmed se
65. stem Checkout Result Step LED Terminals Energized Equipment Operation Remove jumper from T terminal Off G O B Fan relay is energized Reconnect jumper to T terminal On W1 O B Fan and first stage heat are energized Remove jumper from T terminal Off W1 W2 O B Fan first and second stage heat are energized Reconnect jumper to T terminal On G Y1 First and second stage heat are de energized Fan and first stage cooling are energized Remove jumper from T terminal Off G Y1 Y2 Fan first and second stage cooling are energized Reconnect jumper to T terminal On G Y1 Y2 HUM Fan first and second stage cooling with the humidifier are energized Remove jumper from T terminal Off G Y1 Y2 HUM VNT Fan first and second stage cooling with the humidifier and ERV are energized Reconnect jumper to T terminal On None All equipment is de energized Remove jumper from T1 S and 51 On None Return PC8900A to normal operation terminals This is the terminal sequence for W8900A1012 gt On conventional models with the O B relay changeover populated it is energized in the heating mode The default mode for power up is heat If the installer test mode is cycled through cooling to all relays off with the intent of repeating the test the O B relay is not energized until the first stage of heat is cycled on 33 68 0173 3 Table 10 Heat Pump System Checkout
66. t time See Fig 32 Using conventional recovery requires setting the program period times earlier than the area is occupied so the area will be comfortable The program may need to be adjusted periodically to accommodate for weather and seasonal changes The conventional recovery method is used when Adaptive Intelligent Recovery operation is disabled SETPOINT TEMPERATURE ACTUAL TEMPERATURE 60F SLEEP WAKE M6404 Fig 32 Conventional recovery ramp Adaptive Intelligent Recovery Operation Adaptive Intelligent Recovery operation is Honeywell s trademark for the way the Comfort Center system controls the heating and cooling equipment during recovery from an energy savings setting SLEEP LEAVE to a comfort setting WAKE RETURN This provides additional energy savings The advantages are Comfort setting is achieved at the programmed time and maintained regardless of the weather conditions occupants come home and wake up in comfort Drafts from low temperature discharge air are minimized during occupied periods Comfort Center control system automatically uses the more economical first stage of the heat pump as the primary heat source during the heat mode recovery avoiding the use of the expensive second stage of heating auxiliary heat Comfort and energy savings can be achieved in both heating and cooling Reduces heat pump and air conditioner compressor cycling exte
67. tdoor Temperature Sensor When a C7089A Outdoor Temperature Sensor is configured and installed and the PC8900A is configured for humidity control in the heating mode the frost control feature is enabled OUTDOOR TEMPERATURE OHMS OF Anais 2920 to 2905 35 37 2 2953 to 2929 34 4 2978 to 2953 31 7 3002 to 2978 28 9 3026 to 3002 26 1 3050 to 3026 10 23 3 3074 to 3050 5 20 6 3099 to 3074 17 8 3123 to 3099 5 15 0 3147 to 3123 12 2 3171 to 3147 9 4 3195 to 3171 6 7 3220 to 3195 3 9 3244 to 3220 1 1 3268 to 3244 1 7 3292 to 3268 44 3316 to 3292 7 2 3341 to 3316 10 0 3365 to 3341 12 8 3389 to 3365 15 6 3413 to 3389 18 3 3437 to 3413 21 1 3462 to 3437 23 9 3486 to 3462 120 140 160 F 26 7 3510 to 3486 49 60 79 C 29 4 32 2 35 0 37 8 40 6 43 3 46 1 48 9 51 7 54 4 57 2 60 0 62 8 65 6 3534 3510 3558 to 3534 3583 to 3558 3607 to 3582 3631 to 3607 3655 to 3631 3679 to 3655 3703 to 3679 3728 to 3703 3752 to 3728 3776 to 3752 3800 to 3776 3824 to 3800 3849 to 3824 Fig 39 C7089A Outdoor Temperature Sensor and C7100A Discharge Temperature Sensor resistance vs temperature performance characteristics C7100A Discharge Air Temperature Sensor The C7100A Discharge Air Temperature Sensor mounts on the duct wall or plenum surface with integral mounting flange 2 4 junction box Th
68. tion section for sensor resistance characteristics C7100A Discharge Air Sensor See Fig 39 in the Operation section for sensor resistance characteristics C7189A Remote Indoor Sensor NTC Sensor See Fig 40 in the Operation section for sensor resistance characteristics Auxiliary Heat and Emergency Heat Indication PC8900A display indicates when auxiliary heat and emergency heat are activated Input Ratings 20 to 30 Vac 50 60 Hz C7089A Outdoor Sensor PC8900A Comfort Center Control Panel C7189A Remote Indoor Sensor Honeywell CM8900A 1009 Communications Module CM8900A Communication Module Heat Pump Failure Input L Terminal on W8900B Models 24 Vac load 50 60 Hz 0 3 VA load CO Monitor Input CO Terminal on all W8900A C Mod els 24 Vac load 50 60 Hz 0 3 VA load Output Ratings Humidity Control Output Relay 50 VA at 24 Vac Ventilation W1 W2 Y1 Y2 E G O B AUX Y1 W1 a 1 5A running 3 5A inrush at 200 000 cycles 30 Vac b 1 5A running 7 5A inrush at 100 000 cycles 30 Vac Run 4096 power factor minimum Inrush 5096 power factor minimum Temperature Setting Range PC8900A 45 to 88 F 7 to 31 C Humidity Setting Range PC8900A 10 to 80 RH Cooling 40 to 80 RH Heating 10 to 80 RH Calibration C7089A C7100A C7189A and PC8900A are factory calibrated and require no field calibration CO Monitors The W8900A C allows for connection of a CO
69. tions must be met 1 System switch must be in the heat mode or in Auto mode with heat being the last call 2 There must be a call for humidity sensed relative humidity RH is below RH setpoint 3 Fan terminal G must be energized through program ming or by pressing the fan button on the PC8900A Frost Control The frost Control needs an outdoor sensor to be activated The Comfort Center control system calculates the possibility of condensation or frost forming by using the outside temperature and inside temperature to determine the dewpoint When the dewpoint would cause frost or condensation the humidification request will not be honored The frost setting has a value range of zero to ten with zero representing glass with poor insulation and ten representing glass with perfect insulation NOTE Set the frost setting to 10 to severely limit the frost control W8900C Humidity Control The W8900C can be configured to control humidity levels in both the heat and cool modes A humidifier is connected to the HUM terminals The HUM contacts close and activate a humidifier when the sensor RH is below the setpoint RH Dehumidification equipment is controlled by the Y1 Y2 and G terminals These contacts close to activate the air conditioning equipment when the sensed RH is above the setpoint RH The reheat feature is designed to keep the occupants comfortable If the cooling setpoint is reached but the dehumidification setpoint
70. to holes that best fit the appli cation Tighten the mounting screws Reinstall the PC8900A on the wallplate by pressing the PC8900A directly onto the wallplate 205224A WALL COVER PLATE PC8900 WIRING Z4 PLATE PC8900 COMFORT CENTER CONTROL PANEL CHOOSE THREE MOUNTING HOLES THAT BEST FIT APPLICATION M7512A Fig 23 Mounting PC8900A Wiring Plate and 205224A Wall Cover Plate to wall IMPORTANT Erratic temperature readings can occur as a result of any of the wiring practices described below These practices must be avoided to assure proper opera tion Use shielded cable to reduce interference if rerouting of wiring is not possible Wiring the PC8900A N CAUTION Keep wiring at least one foot away from large inductive loads such as motors line starters lightning ballasts and large power distribution panels Failure to follow these wiring practices can introduce electrical interference noise which can cause erratic system operation Use shielded cable to reduce interference if rerouting of wiring is not possible Ground the shielded cable only to GND terminal on W8900A C Do not route thermostat wiring with building power wiring next to control contactors or near light dim ming circuits electric motors or welding equipment Avoid poor wiring connections Avoid intermittent or missing building earth ground 68 0173 3 N CAUTION Disconnect the power supply before connecting wir
71. ttings PC8900A displays temperature Ebr uc FE i r Laur 1 I l and readings in C 1 l settings and readings in F 0 LOL L BE s ELIT 1 3 PC8900A displays setpoint times and 7j 1 70 1 PC8900A displays setpoint times and clock CLA LL TS OL clock times 12 hour clock with AM PU LOL LLL Fs FL times 24 hour clock with military time M6373 and PM M6388 LU rmn Pyes ee el ME System is set for conventional recovery When recovering from setback modes programmed times indicate when recovery begins See Operation section for description System is set for Adaptive Intelligent r Recovery TM When recovering from setback modes programmed times indicate when recovery ends See Operation section for description M6389 a The humidity option can only be set for heat or cool If both are set to Y it will not honor either one je Heat Options When HEAT is flashing refer to Table 5 for the options pertaining to the heat equipment that appear in the PC8900A display after each press of the CHECK key HEAT and its list of options appear only when the system allows field selection of cycle rates and only stages present in the remote module hardware are shown SYSTEM HEAT sysTem Honeywell A ONE OF THESE SEGMENTS WILL BE FLASHING M6401 Fig 30 Initial display for installer setup Table 5 Heating Cycle Rates
72. up or down arrowhead key until the display shows the desired temperature HEAT SETPT COOL FAN cum ot wo M6210 f Press HEAT COOL SETPOINTS to switch to COOL SET PT HEAT COOL SETPT FAN umo 7 Ot OA WAKE M6231 NOTE The time is used for both heating and cooling When you change the time while setting the cooling temperatures the time is also changed for heating g Press and hold the up or down arrowhead key until the display shows the desired temperature M6232 NOTE When the numbers do not move while you are holding the up or down arrowhead key the setting limit 45 F and 88 F is reached When set for auto changeover there must be 3 F between the heating and cooling setpoints When setting the cooling setpoint with the heating setpoint at 68 the cooling setpoint can be no lower than 71 And when cooling is set for 70 the heat setpoint changes to 67 The PC8900A automatically pushes the alternate setpoint so you can adjust the setpoint to its desired setting When set for manual changeover the 3 differential between the heating and cooling setpoint does not apply 3 Setting Fan IMPORTANT The FAN and VENTILATOR settings are the same for heating and cooling The FAN setting for heating cannot be set for AUTO and the cooling set for CIRC a Press FAN until FAN AUTO FAN ON or FAN CIRC is displayed as desired HEAT COOL SETPT FAN Tome
73. when the PC8900A starts operating the heating and cooling equipment to reach the set temperature from the energy savings temperature LEAVE SLEEP to the comfort temperature WAKE RETURN DAILY PROGRAM SCHEDULE The schedule of WAKE LEAVE RETURN and SLEEP period start times temperatures fan and ventilation that you program to run for each individual day ENERGY SAVING TEMPERATURE The lower heating or higher cooling temperature that lets you save on heating and cooling costs when you re asleep or away Also called the setback winter or setup summer temperature OUTDOOR TEMPERATURE In systems with an outdoor sensor the temperature reading at the sensor Reading is available by pressing the CHECK key until the display shows OUT and the temperature SELECT PERIOD KEY Key that starts the program mode It also lets you choose WAKE LEAVE RETURN or SLEEP period to review or program PREPROGRAMMED SCHEDULE The schedule programmed into your PC8900A at the factory It sets a night program that provides energy savings if you don t set your own program or if your personal program is lost for any reason The program which is the same for all days of the week is Heating Cooling Fan Vent Period Start Time Temp Temp Setting Setting Saturday WAKE 6 00 AM 70 78 F AUTO OFF LEAVE 8 00 62 F 85 F AUTO OFF RETURN 6 00 PM 70 F 78 F AUTO O
74. where hot or cold air is blowing out of a fan or vent such as next to the compressor discharge line in the outdoor unit Mount it high enough to prevent tampering or coverage by snow ice or debris The wire distance between the C7089A and W8900A C should not exceed 200 ft Mounting 1 Remove the sensor from the mounting clip 2 Markthe area on the surface where the C7089A mount ing clip will be mounted 3 Mountthe clip Fig 27 Typical locations for C7089A Outdoor Sensor Wiring the C7089A Outdoor Sensor if needed N CAUTION Failure to use the following wiring practices can introduce electrical interference noise which can cause erratic system operation Keep wiring at least one foot away from large inductive loads such as motors line starters lightning ballasts and large power distribution panels Use shielded cable to reduce interference when rerouting wires is not possible Ground the shielded cable to the ground terminal on the W8900A C 23 WIRING HOLE THROUGH STRUCTURE 09969696666 A USE APPROPRIATE MOUNTING MEANS FOR THE TYPE OF STRUCTURE A PLUG WIRING HOLE WITH NONHARDENING CAULK OR PUTTY A IF SHIELDED CABLE IS REQUIRED GROUND TO GND TERMINAL ON W8900 ide Fig 28 Wiring diagram for C7089A Outdoor Sensor to W8900A C Remote Module IMPORTANT Erratic temperature readings from a sensor can occur as a result of any of the wiring practices described below Use sh
75. wire see Fig 10 See Fig 11 through 20 for wiring dia grams for specific equipment applications IMPORTANT Be sure to connect the C terminal to transformer W8900 common IN NEW INSTALLATION 1 Locate the terminal strip s on the HVAC equipment FOR STRAIGHT 2 Referto Fig 11 through 20 for wiring diagrams for spe STRIP ESIN G T cific equipment applications i 3 Connect all loads to the appropriate W8900A C wiring terminal using 18 gauge color coded thermostat wire FOR WRAPAROUND see Fig 10 CONNECTION 4 Use a small screwdriver to connect the loads Do not STRIP 7 16 IN 1MM overtighten device can be damaged M4464 Fig 10 Proper wiring technique for W8900A C and PC8900A Table 2 Conventional Applications W8900A or C W8900A C Terminal Designation Function Existing Thermostat Designation 1 PC8900A Control Panel 2 PC8900A Control Panel 3 PC8900A Control Panel 4 PC8900A Control Panel B Heating changeover valve B C 24 Vac Transformer Common C Carbon Dioxide Monitor VNT VNT Relay G Fan Relay G GND Ground HUM Humidity Relay OUT Outdoor Air Temperature Sensor Cooling Changeover Valve R 24 Vac System Transformer R RC 24 Vac Cooling Transformer RC RH 24 Vac Heating Transformer RH S S1 Remote Air Temperature Sensor See note a Fan Control Evaporative Cooling F See

Honeywell Thermostat perfect climate comfort center control system User's Manual

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