708921-A iQ SS HP ii.indd
Contents
1. 7 staller SONGS 7 1 Rege ie P C TO E o EE EO 4 2 210 01 21 9 MEE E ere 8 3 Dealer Int rmatiOr E aaan 8 8 5 Fieat Off Delay uu ee 9 SANS 0 t ME an neen ennen 9 7 Service TESS deedeetee neat P 9 The SERVICE INFORMATION Screens nr 10 Other Configuration Entries bint eciam 11 1 Minimum Heat Pump Operating Temp eetset 11 2 A t Changeover Tg oen bee neben 12 2 Dateand aaah einen eene eene 12 4 Program Schedule vs Nonprogrammabhble nr nennen nennen nnns 12 s u y re ene o mmm 13 6 Humidity P 13 Zomar ENG OU p cc ces eae 13 System Operation Quick Start 14 System Startup Checkout and Troubeshooting eese enne nennen nnne 14 SYSTEM DIAGNOSIS AND TROUBLESHOOTING U U u uu2. 9 5158314 AIIAHAS HOLOVHINOO HOLOVHINOO HAANNN AWVN NOLLVINHOHNI SWALSAS JOVNYNA 79 SIN31SAS H3AAO18 SINOSVNVd YANVATO HIV dIVV AN lVLI3G 1SOHH3Q 1109 NOLIVNIINH3 L H33Q 1 1 YaAISICINNH SAIHOSSAIIV 1V3H WALSAS HOOALNO 138 AW1Ad 440 1V3H 13S Srinvdaa SIJNOO 1S0Hd3ad 1 NOLIVINHOHNI SAIHOSSIIIV WALSAS AW1Ad 330 1V3H 51591 3OIAH3S SONILLAS HATIVLSNI Figure 11 Controller Menu Structure Inverter LED to the left of blue DIP switch block Figure 12 Inverter LED Location Behind Interface Board to the left of blue DIP switch block BitstoR g Communication Figure 13 Interface Board LED Locations Figure 14 EXV Board Green LED Location INSTALLER PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE OWNER 708921A Replaces 7089210 Specifications and illustrations subject to change without notice and without incurring obligations O Fallon MO COMPLETE COMFORT GENUINE VA 708921A Printed in U S A 07 09
3. Wire Sized based N E C for 60 C type copper conductors Table 1 Copper Wire Ampacity Tables 1 A properly sized branch circuit and disconnect switch must be installed where it is easily accessible and within line of sight of the outdoor unit 2 Remove the control panel cover Route the power and ground wires 3 wires including earth ground from the disconnect box to the unit Use of outdoor shielded conduit metal lined Sealtite is required The electrical conduit opening is located on the lower left corner of the control box 3 Connect the power wires to L1 and L2 box lugs of the contactor and the ground wire to the grounding lug to the left of the contactor See Figures 2 and 3 Only copper wires should be used 4 Replace the control panel cover before applying power Control Circuit Wiring The heat pump is designed to operate with a 24 VAC Class II control circuit Control circuit wiring must comply with the latest version of the National Electrical Code ANSI NFPA 70 as supplemented by local building codes In general 24 VAC control power and communication bus wiring must be run to interconnect the thermostat controller the indoor unit and the outdoor unit The hub of this network and source of the 24 VAC is located within the indoor unit air handler or furnace Refer to iQ Drive System Field Wiring Instructions NORDYNE document 709031 shipped with the controller for connection of control
4. NOLLVOVA LAS 3INLLONV 31VG 13S ALVA WLNN NOLLVOVA NOILVOVA 34O NO SNIAVS LHOMAVG O1nV SNIAVS LHOTTAVG OLNV AWIL alva 138 ANIL Alva 13S NOLIVOVA AAIGINNHAG AdIGIIAQH SONILLAS Main Screen Figure 10 Controller Menu Structure LO N 5 55 v T1V HOS 1VOIdAL AWIL 138 NOH LAS SVD MA OlH19313 HYONATVI 3WI1 NAY SALW INWND HIV 39lAtu3S z JOVLS 1 S9VLS 1 39v1S TIVILN3HHHIO LYVLS TIVILN3H3HHIO LYVLS 9 18 39VIS 319 6 3ONVHO SLINdLNO 313H9Sld HOLOVHLNOOD S1S31 NH dWNd YAISICINNH 5183 NNH HIV 3IAVN HOLOVH INOO Sd asid 3ovNund SVD avd LNdNI SNILVINGOW OI SONVHO SVD HALI uiv 5183 AOVNYNA HAANNN S39VLS HO ANO 193 13S 1023138 z ADVLS L 39v1S L 39vis LYVLS TIVILN3H3HHIO LYVLS 9 18 39 15 19 OlH19313 HO SVD 193135 SLAdLNO 4 26 ings Installer Setti 51531 NAY 1V3H SLSSLNNY 51591
5. 15 Controlleru 15 Outdoor Unit Inverter r e e 16 Outdoor Unit Interface Board right side small circuit board 16 Outdoor Unit EXV Board left side small circuit board 16 Interface Board in GG iQ furnace kit or air ub later IDEE 16 door EXV Board m 16 Indoor Unit Constant CFM Motor Control Board 17 Indoor Unit One or Two Stage G7 Furnace 17 Imdoor Unit iQ Modulating Gas Furnace Board ar Orari cuia ccm PUER EXPE D OTIO ERE 17 Common troubleshooting SSUES uuruuu u uuu sasaqa ne 17 PII TEIN e T L 18 FIGURES DIAGRAMS 18 2 PREPARATION Before proceeding with installation of iQ heat pump equipment consult with the distributor and homeowner to confirm that the equipment listed on the order is what was ordered and that it matches labeling on the equipment packaging Next determine including consultation with the homeowner the intended preferred location for placement of the compressor outdoor coil unit Unit envelope dimensions are shown in Figure 1 This heat pump is designed for outdoor installation only Unit placement must take into consideration the follo
6. Inspect the condensate disposal line from the indoor coil at the beginning of the cooling season to make sure it is not obstructed Remove any leaves grass clippings and debris from the outdoor unit coil being careful not to damage the aluminum fins Dirt may be cleared from the coil by using a water hose directed through the discharge fan grille toward the outside of the unit Have a yearly inspection by a qualified service technician to ensure that the system is performing at its optimal level FIGURES and DIAGRAMS EN WALL 18 S CONTROL PANEL 18 Figure 1 Unit Envelope Dimensions Inverter black plastic case WE wr TT eer M E D vin Outdoor peser Outdoor EXV Board EY N Interface Board Contactor Low Voltage Control Wiring Compartment Figure 2 iQ Drive Heat Pump Control Panel Figure 3 Power Wiring Connections 20 iQ DRIVE HEAT PUMP OUTDOOR SECTION OD FAN Z R MOTOR lt 7 a NEZ 8 I oe LOW PRESSURE SWITCH PANASONIC OD TEMP INVERTER SENSOR FOR DEFROST TMS S COMPR OUTDOOR DISCHG AMBIENT TEMP TEMP PRESSURE SENSOR SENSOR TRANSDUCER ll ll wre 9 HARNESS He SUCTION LINE THERMISTOR L 6 WIRE HARNESS REACTO
7. Wait at least 60 seconds after removing line voltage before touching any inverter parts or wiring Normal Examine the following with the control panel cover off Note the two smaller circuit boards mounted on a metal bridge over the inverter The red LED behind the upper right side of the bridge should be lit and on steady when power is applied to the inverter Refer to Figures 2 and 12 Abnormal red LED behind the upper right side of the bridge is not lit In this case power is not being provided to the inverter Check that line voltage is being applied to the bottom of the contactor If so check that 24 vac is being provided across the contactor coil If not check the control power wiring RED and GRY wires for 24 vac Check that the high pressure switch is closed A fault indicating OD UNIT COMM FAULT or OD UNIT LOST POWER would also result from no line voltage applied The red LED behind the upper right side of the bridge is lit but blinking This indicates that the inverter is powered up and that it detects a fault condition If the controller does not display a fault message put the unit into HEAT or COOL mode and a message will be displayed Note that when line power is removed this LED will blink for about 1 minute before going out Check that the 3 and 4 position communication plugs are connected to the terminals marked INVERTER and on the right side of the outdoor interface board Outdo
8. YOLWdIOILLNV SALW T3H HOOdLNO HOOQNI SLOWSY SYN IWHAdWAL HOOONI 5138330 HAANNN H3 LN3 100901 TVLOL AINO Lsnrav 1101201 ALIYNDAS 3SNOdS3H 1V3H 9 IV3H AH3AOO3H 1HVIAS AWIL OLNV NOILVOISIGINNHAG 35vsfi Q3HOS SNOILdO AWIL NO LN3LLLIANHLLNI 1SVHINOO 3909 HNOH HO EL 51157190 HO LISHN3HHVJ SONILLAS N33H2S 9 WvH9OHd AdOO 031511 SAVA 40 JNOHD HO HOV3 WOldAL vm 31nqaHos OLAdOO 2018 JINGAHOS er LM 3 1103H9S 3a1nqaHos 1000 1009 olny 440 ON3W LNSLLIWYSLNI 5195550 SNOILdO SONILLAS SONILLAS 10103901 8 SONILLAS AGOW WvHoOHd COH AWIL 138 NIVIN OLNV AVGNON WOtd AdOO SAVOMASM AH3A3 NNAN lV3H 1009 OLNV AsO 9NILVH3dO LNANVINYAd SIHL ueaJog JO nu N seieoripu 1404 3iLON AWILTLNA
9. operating mode e g COOL or HEAT in large numerals and letters Across the bottom line of the display are five words or abbreviations normally RH TEMP MODE FAN MENU which represent selectable entry points into the menus The user can always return to the main screen from any other screen by repeatedly pressing the 4 3 13 09 12 18 PM OUTDOOR FAN AUTO 16 HEAT HUMIDITY 36 HEAT 62 COOL 85 RH TEMP MODE FAN MENU Installer Settings Using procedures explained in iQ Drive training go to the INSTALLER SETTINGS menu screen INSTALLER SETTINGS SYSTEM CONFIGURATION ACCESSORIES DEALER INFORMATION SERVICE TESTS RESTORE DEFAULTS DEFROST CONFIG HEAT OFF DELAY ALTITUDE ADJUST IQ DRIVE REV 5 0 SELECT OPTION AW lt PREVIOUS Other than in the splash screen displayed when power is first applied to the controller this is the only screen which displays the controller software version number NOTE It is important that any settings or service tests which are appropriate be made at the time of system installation 1 System Configuration Any time CONFIGURATION NEEDED appears at the top of the Main Screen the user must proceed through the SYSTEM CONFIGURATION screens even if no changes to values or options are necessary This will occur when installing a new thermostat or moving a thermostat to a different type of iQ System The outdoor unit should be powered up when confirming or entering sys
10. 1 Minimum Heat Pump Operating Temperature This is the outdoor temperature measured beneath the outdoor unit control panel below which when heating is called for the heat pump will not operate and backup heat means electric heat or gas furnace will take over The ideal temperature setting is the balance point below which it would be more economical to run the backup heat rather than the heat pump The default and minimum value for this parameter is 12 F Once the outdoor temperature rises above this setpoint the heat pump will be permitted to operate again after the demand has been satisfied and backup heat has shut off Determination of the balance point is not simple and depends on a variety of local factors including the price of electricity and gas at any particular time In order to modify the value do the following From the Main Screen press the 4 or P gt key to select MENU at the bottom of the screen then press the Bl key to see the Main Menu Use the or V key to select SETTINGS then press the key to enter the Settings menu Use the A or Y key to select OPTIONS then press the key to enter the Options screen 11 OPTIONS PROTAN SCHED USAGE 4 SCHED EVENTS DAY AUTO CHANGEOVER TIME 60 MINUTES SMART RECOVERY OFF HEAT PUMP USAGE LIMIT NOT BELOW 14F SELECT AW CHANGE B lt PREVIOUS Use the A or V key to select the value under HEAT PUMP USAGE LIMIT then press
11. Evacuate the system to at least 500 microns to remove non condensables and water vapor Close the manifold valves and remove the vacuum pump 4 Connect the refrigerant tank to the center manifold port of the gauge set Pressurize the system enough to break the vacuum 5 Open both service valves by turning the valve stems 14 turn counterclockwise The stem will be in line with the tubes Replace the stem caps and tighten Proceed with Refrigerant Charging section WARNING The heat pump system contains liquid and gaseous refrigerant under pressure Adjustment of refrigerant charge should only be done by a qualified EPA certified technician thoroughly familiar with this type of equipment Under no circumstances should the homeowner attempt to install and or service this equipment Failure to comply with this warning could result in equipment damage personal injury or death Refrigerant Charging NOTE The unit must be charged at a fixed speed setting For this purpose the thermostat controller needs to be wired and powered prior to charging Using the thermostat go to CHARGE MODE under SERVICE TESTS from the INSTALLER SETTINGS menu described later in this document Select CHARGE MODE to add or verify system charge In the CHARGE MODE screen HEATING or COOLING mode may be selected depending upon which mode of operation is more appropriate or convenient at the time of charging Notes heat pump is factory charged
12. and actual speeds are shown for the compressor outdoor fan and indoor blower The line above ROOM TEMP displays helpful system status messages including whether or not the system is dehumidifying during cooling CAPACITY CONTROL HEAT PUMP HEATING ROOM TEMP 704 F SP 700 MODSP 698 F USED DEMAND 6 F ACT TARG STEP 8 8 COMP RPM 2636 2640 OD FAN RPM 1042 1050 ID FAN RPM 910 900 OVERRIDE ACTIVE NO lt PREVIOUS Other Configuration Entries The following settings in the controller fall into the following categories options and features which are not typically used or understood by the homeowner and should be examined and considered for adjustment if desired by the installer including minimum heat pump operating temperature autochangeover time settings which are recommended to be done by the installer including setting date and time options and features which are recommended to be set with the homeowner s oversight including selection of programmable schedule versus non programmable usage of dehumidification enabled by default humidity settings usage of Smart Recovery disabled by default e further features which the installer may demonstrate to the homeowner including schedule including setback temperature settings usage of holds fan options temperature units F or C USA clock or military time 12 or 24 hour The above settings are described below
13. is changed back to OFF and saved The red blinking backlight serves as a reminder that the unit is operating in an abnormal service mode Select OFF from the list that includes ON and OFF and SAVE when finished e FURNACE TESTS Runs the system at the selected fire level to allow confirmation of proper operation The screen backlight will blink red A short list of instructions reminders is provided Select START to run a single stage furnace Select LO FIRE or HI FIRE to run a two stage furnace The user may navigate to other screens e g SERVICE INFORMATION during the process The red blinking backlight serves as a reminder that the unit is operating in an abnormal service mode Select DONE from the list that includes LO FIRE HI FIRE START STOP and SAVE lB when the test is complete before leaving the screen for the last time AIR COND RUN TESTS and HEAT PUMP RUN TESTS In these screens the unit can be made to run at a fixed speed regardless of room temperature RUN can be changed between OFF MAX speed INTERMED iate speed and MIN speed MAX speed is the same as that used in charge mode The screen backlight will blink red when anything but OFF is selected and saved The user may navigate to other screens e g SERVICE INFORMATION during the process until RUN in this screen is changed back to OFF and saved The red blinking backlight serves as a reminder that the unit is operating in an abnormal servic
14. it displays one decimal place without showing the decimal point e g 704 70 4 CLEAR FAULT HISTORY It is recommended that any faults that appeared during and as a consequence of installation be cleared out before leaving CALIBRATION DATA A Panasonic blower can be recalibrated at any time from this screen by pressing the P gt key This may be done if a significant change has been made to blower discharge ducting or damper usage This screen is not normally useful to an installer Data is not displayed for type B blower motors COMMUNICATION DATA This important screen indicates the status of communication with all elements on the iQ bus All should show OK If not investigate and resolve communication wiring issues COMMUNICATION DATA BLOWER OK OUTDOOR BAD ID INTERFACE BD OK OD INTERFACE BD lt PREVIOUS CCFM DATA This is not useful to the installer DEFROST STATUS This screen confirms that a heat pump is in defrost and provides detailed information helpful to understand a the status of an in progress defrost cycle and b conditions which may trigger the next defrost cycle It also indicates the state of the reversing valve ON for cooling or during defrost heating Refer to training DEFROST STATUS DEFROST ON RV ON DEFR STG TARGET STEP 9 TIMERS lt PREVIOUS CAPACITY CONTROL This screen contains information primarily relating to the status of the outdoor iQ unit Target
15. rate can be expected during heat pump heating operation Abnormal If the green LED is not lit the EXV board is not getting 24 vac power from the interface board Check for 24 vac between R and C on the interface board and check that the tabs marked R and C on the interface board are wired to R and on the EXV board These should not be cross wired If the green LED is blinking at a regular rate during cooling it indicates that one of the two EXV sensors is reading out of range Refer to training literature for sensor interpretation and troubleshooting If the green LED is blinking at a non uniform rate heartbeat it indicates that the board has been placed in the Manual Mode Hold down the small black button on the board for more than 3 seconds to return it to automatic control mode Indoor Unit Constant CFM Motor Control Board Normal The red LED near the top of the board should be on steadily The green LED near the top of the board should have a heartbeat blink consisting of a double blink followed by a pause repeated Of the four LEDs towards the left side of the board the lowest one marked H should be on when humidification is called for Abnormal If the green LED near the top of the board is not lit the board is not connected to the communication network properly If the red LED near the top of the board is not lit the board is not getting 24 vac control power from the furnace boar
16. service valves on the heat pump Avoid sharp radius bends and turns 2 Make sure that the vapor line is properly insulated for the entire length of the run for maximum system efficiency Improper insulation may also create condensation and result in water damage to the equipment and building structure 3 Remove the valve cores from the heat pump service valves Wrap the valves completely with wet rags to protect them from overheating during the brazing operation 4 Connect both the vapor and liquid lines Tubes should be round de burred and free of debris Use a phosphorous and copper or silver brazing alloy for the joints Do not use soft solder with a low melting point 5 Connect the indoor lines according to the indoor unit instructions The indoor coil will require the same alloys and wet rags to protect the sensors from excessive heat on the refrigerant lines 6 Allow the service valves to cool and replace the valve cores 7 Leak test the connections using low pressure dry nitrogen System Evacuation 1 Connect the refrigerant gauge manifold to both the vapor and liquid service valves See Figure 8 Connect the center port to the vacuum pump 2 Open both manifold valves and start the vacuum pump After a short time it is recommended to close the manifold valves and stop the vacuum pump to look for a rapid loss of vacuum Loss of vacuum indicates that there is a leak in the system Repeat the leak test if required 3
17. the wires meant to connect to 24 vac control power RED and GRAY wires are not mistakenly connected to the communication bus wires YEL WHT GRN 24 volts applied to the communication bus will damage the equipment R terminal screw contactor coil GRY RHS Recheck Wiring Check that wire routing is correct and connections are secure for all power and control wiring REFRIGERANT LINE CONNECTIONS Line Design and Routing Refrigerant lines must be connected by a licensed EPA certified technician following sound established installation practice Once the heat pump location has been determined and the unit setin place the refrigerant lines should be routed and connected Refrigerant lines should follow a direct path from the indoor coil to the outdoor unit avoiding sharp bends When lines pass through walls make sure to properly seal and support them so that vibration is not transmitted to the structure Refrigerant tubing should be supported in a manner which assures that the tubing will not vibrate or wear as a result of contact with sharp materials or edges during system operation e Lines must be clean refrigeration grade copper e Avoid removing caps and plugs from the heat pump or lines until they are ready to be connected e Insulate the vapor line with refrigerant line insulation 4 wall thickness or greater Proper system performance and oil management depend on properly selecting the liquid
18. 2 accurate time and date stamp for any faults logged during installation checkout for example in FAULT HISTORY By default the clock is in 12 hour format This may be changed on the OPTIONS menu screen see either of the above two items Daylight Saving Time is automatically taken into account but may be disabled from the SET DATE AND TIME menu screen In order to set date and time do the following From the Main Screen press the key to select MENU at the bottom of the screen then press the Bl key to see the Main Menu e SET DATE AND TIME will be selected Press the ll key two times Enter the year month day date hour and minute on consecutive screens Use the A or V key to change any value and press the P gt key to advance to the next After setting the minutes value press the key to save the complete setting Press the 4 key multiple times to return to the Main Screen 4 Program Schedule versus Nonprogrammable While using setback program schedules are advisable to take advantage of potential economic and energy savings some homeowners still prefer to perform setpoint adjustment by exclusively using the and Y keys The following setting provides the nonprogrammable option or the option for different numbers of events per day 2 or 4 on the program schedule In order to set the program schedule option do the following From the Main Screen press the key to select MENU a
19. Connect the gauge manifold to the liquid and vapor service valves Figure 8 2 Start the system in CHARGE MODE COOLING Allow the system to run 15 minutes to stabilize 3 Record the liquid refrigerant pressure in psig at the service valve 4 Record the liquid refrigerant temperature in F at the service valve 5 Using the temperature value recorded determine the corresponding liquid refrigerant pressure from the upper curve for cooling in the charging chart Figure 9 6 If the pressure measured in step 3 is less than the required liquid refrigerant pressure determined in step 5 then refrigerant needs to be added 7 the pressure measured in step is greater than the required liquid refrigerant pressure determined in step 5 then the system is over charged 8 Add or remove charge from the system depending on the measurements recorded Allow the system to stabilize for 15 minutes before taking the next readings Alternate Procedure for Charging Heat Pump in Heating Mode with outdoor temperatures below 60 F Based on Subcooling Use this method when the outdoor temperature is 60 F or lower to estimate the correct charge in heating mode The indoor temperature should be between 65 F and 75 F The preferred method of charging is by weighing in the additional refrigerant required If a charging scale is not available the correct charge can be estimated by this method Refrigerant can be stored in the receiver an
20. Installation Instructions iDrive Split System Heat Pump The iQ Drive heat pump operates as part of a larger intercommunicating system which provides temperature air flow and humidity control for a residence or other similarly sized building This system includes this outdoor unit the dedicated iQ controller thermostat and an iQ system compatible indoor unit typically an air handler with electric strip heat or a gas furnace The system will function only if these components are matched and intended for use within this system A complete list of compatible equipment by model and serial number is available in NORDYNE document 709031 iQ Field Wiring Installation Instruction Accessory equipment which may be used with this system includes humidifiers electric or electronic air cleaners and U V ultraviolet sterilizing lamps Refer to the System Operation section below for a complete description of how to use the various features of the system In addition to providing the means for operation the controller also serves as the means for initial system configuration and setup and it provides a considerable amount of information for troubleshooting the system and diagnosing problems HIM III mm mmm MA OTHER REFERENCE DOCUMENTS Installation instruction documents for indoor equipment furnace or air handler optional humidifier etc iQ Field Wiring Installation Instruction d
21. Pump Usage Limit b the heat pump is in a fault condition or c the heat pump is not able to satisfy the demand after a time delay The System Is In AUTO Mode but It Won t Switch Quickly From Heating to Cooling or the Reverse e There is a configurable delay Auto Changeover Time between operating in heating and restarting in cooling or the reverse when in AUTO mode The default delay for this changeover is 60 minutes Although There Is a Large Demand At Startup the Compressor Only Runs at Medium Speed Regardless of demand the system will always start and run at an intermediate speed for one minute Subsequently the speed may increase significantly 17 Humidification or Dehumidification Setpoints Are Not Being Satisfied The first priority of the system is to achieve the temperature setpoint s circumstances it will also satisfy humidity setpoints its ability to accomplish this is significantly affected by a variety of installation based factors and circumstances MAINTENANCE A IMPORTANT Be certain the electrical outdoor unit and the furnace or air handler is disconnected before doing the following recommended maintenance 18 While under most power to the Inspect the indoor air filter monthly Clean or replace it at the start of each heating and cooling season or when an accumulation of dust or dirt is visible If the indoor coil needs to be cleaned contact a qualified service technician
22. R REVERSING VALVE COIL BLACK YELLOW HIGH PRESS SWITCH CONTACTOR CRANKCASE HEATER FIELD WIRING TO INDOOR SECTION GRAY LEGEND FIELD WIRING LINE VOLTAGE 208 230 LOW VOLTAGE HIGH VOLTAGE Figure 4 iQ Heat Pump Wiring Diagram 21 Figure 6 iQ Heat Pump Control Wiring Outdoor Destinations 22 23 SINGLE LOOP SHOWN Figure 7 Wire Looping Through a Toroidial Choke Suction Service Port rae Vapor Line Liquid Line Service Valve Service Valve Figure 8 Service Ports and Valves Below Control Panel Cooling Mode Outdoor Temperature above 60 F Liquid Pressure psig 60 70 80 90 100 110 120 130 Liquid Temperature F Heating Mode Outdoor Temperature below 60 F 380 360 340 320 300 Liquid Pressure psig 280 75 80 85 90 95 100 105 110 115 Liauid Temperature F Figure 9 Charging Charts for iQ Heat Pump 24 AWIL 440 NVA NO LNALLINHALNI Snivisrinv3 OH INOO ALIOVd VO Snivis 1 VIVO W499 VIVO NOLIVOINQINIWWOO VIVO AHOLSIH LINVA 50115 3univH3adWa l SNIWLS SNIWLS SNIWLS SNIWLS YOSSAYdNOOD Sn1vLS Linvs NOILVIAHOHNI 329IAH3S I SONILLAS I I YATIVISN
23. SETTINGS then press the key to enter the Settings menu e Use the A or V key to select OPTIONS then press the key to enter the Options screen e Use the A or Y key to select the value under DEHUMIDIFICATION then press the BI key to allow changing the setting Use the A or V key to change the value between ON the default and OFF then press the ll key to save the setting Press the 4 key multiple times to return to the Main Screen 6 Humidity Settings Separate setpoints for humidification and dehumidification are available in units of percent RH relative humidity The humidify setpoint only is relevant if optional humidifier equipment has been installed and connected to the system the 24 vac H output See the Field Wiring Installation Instructions The installer should clarify for the homeowner that priority is given to cooling over dehumidifying so the ability of the system to satisfy the RH setpoint s depends on a variety of conditions For example if the cooling load causes the unit to run at an intermediate speed or higher the effectiveness of dehumidification is increased Humidification can operate when the system is heating or the fan is set to Manual ON with the compressor off Dehumidification can operate only when the system is cooling mode the dehumidification option is enabled and room temperature is close to the setpoint In order to set the humidity setpoint s do the follo
24. STS Press the key to enter the screen which allows access to a list of service tests These tests provide an easy way for the service person to operate the system in various modes for operational confirmation and diagnostic troubleshooting during installation startup The following five options are available in the submenu SERVICE TESTS CHARGE MODE FURNACE TESTS AIR COND RUN TESTS HEAT PUMP RUN TESTS DISCRETE OUTPUTS SELECT OPTION AW lt PREVIOUS NOTE While running the system from Service Tests is convenient for some startup operations much of the normal fault handling and diagnostic message functionality is disabled Within each test screen there may be more than one entry which can be changed Select the desired entry to be modified using the A and W keys The line or value with a dark background behind the characters is considered selected Press the key to allow changing the selected item its dark background will then blink Set the desired value for the item using the and Y keys then press the Bl key to save it The following is a brief description of the SERVICE TEST categories e CHARGE MODE Runs the system at the proper speed for checking and adjusting refrigerant charge Select the mode as HEATING or COOLING then change RUN from OFF to ON The screen backlight will blink red The user may navigate to other screens e g SERVICE INFORMATION during the process until ON in the CHARGE MODE screen
25. ached during the defrost sequence will signal the end of the defrost phase during which the system heats up the outdoor coil to melt accumulated frost Default value is 75 F e COIL DEFROST DELTA T During heat pump heating operation a defrost sequence will be triggered when the outdoor coil temperature falls this amount below the temperature it would operate at with a clear unfrosted coil Default value is 6 F DEFROST CONFIG DEFR TERMINATION TEMP 75 DEG F COIL DEFROST DELTA T 6 DEG F SELECT AW lt PREVIOUS CHANGE B Under normal circumstances it is not necessary or advisable to change these from their default values 5 Heat Off Delay If the system includes a G6 gas furnace you may use the A or Y keys to select HEAT OFF DELAY Press the IB key to enter the screen which allows changes to the length of time that the blower indoor fan will remain on after the furnace flame is extinguished Under normal circumstances it is not necessary or advisable to change this from its default value of 120 seconds 6 Altitude Adjust If the system includes an iQ modulating gas furnace you may use the A or W keys to select ALTITUDE ADJUST Press the key to enter the screen which allows changes to the installation altitude feet above sea level This entry is advisable for the modulating gas furnace Refer also to the furnace Installation Instructions 7 Service Tests You may use the A or W keys to select SERVICE TE
26. addition at the base of the Main Screen CANCEL ALERT will appear When this is selected and the key is pressed the maintenance reminder message will be removed 8 ACCESSORIES AIR FILTER HUMIDIFIER UV LAMP AIR CLEANER SELECT OPTION AW lt PREVIOUS Making changes or entries under ACCESSORIES is optional 3 Dealer Information Use the A or V keys to select DEALER INFORMATION Press the key to enter the dealer information summary screen and submenus and screens This set of screens allows the installer to enter text information which will be displayed on a SERVICE NEEDED display screen if a persistent fault occurs The following items may be entered e Brand name Maytag Frigidaire NuTone Broan Tappan Westinghouse or custom Model Number e Contractor Name e Contractor Phone Number DEALER INFORMATION BRAND NAME MAYTAG MODEL NUMBER FT4BI 048K CONTRACTOR NAME JOE S HVAC CONTRACTOR PHONE 911 393 7777 SELECT OPTION AW lt PREVIOUS The entered dealer information summary screen accessible here will be available for future reference by a serviceperson under INSTALLER SETTINGS gt DEALER INFORMATION Entry of this information is optional 4 Defrost Configuration Use the A or Y keys to select DEFROST CONFIG Press the key to enter the screen which allows changes to e DEFROST TERMINATION TEMPERATURE This is the outdoor coil temperature value which when re
27. ame e FAULT STATUS The top entry is ACTIVE FAULT This should show NO FAULT unless the last fault detected has not cleared after its 5 minute lockout period or the fault condition still exists The remainder of the screen shows a history of previous faults or conditions detected with military time and date stamps for each Having the correct time and date configured is important in making this list useful Use the P gt key to view the remainder of the last most recent 10 faults logged Generally fault logging is not functional during Service Tests 10 FAULT STATUS ACTIVE FAULT LOW PRESSURE SWITCH FAULT HISTORY 1 LOW PRESSURE SWITCH FLT 23 59 11 14 09 2 OD UNIT COMM FLT 20 23 59 10 31 09 3 NO FAULT lt PREVIOUS COMPRESSOR STATUS This screen should confirm the configured size as MODEL NUMBER 20 2 tons 30 3 tons etc With correct configuration only 20 30 or 40 should appear here LOW PRESSURE SW shows the state of the low pressure switch Any COMPR ERROR CODE number normally 0 will be logged in the FAULT STATUS screen in more easily understood wording The displayed information is read from the outdoor unit OUTDOOR FAN STATUS Any FAN ERROR CODE number normally 0 will be logged in the FAULT STATUS screen in more easily understood wording TEMPERATURE STATUS This screen lists all temperatures measured by the iQ system TEMP AT TSTAT is the local temperature used for control and
28. and vapor line sizes Refer to Table for the proper size of field supplied lines The maximum allowable refrigerant line length is 100 ft Liquid Line Set 75 to 100 up to 100 3 4 in 7 8 in 7 8 in 1 1 8 in 3 8 in 19 mm 22 mm 22 mm 29 mm 10mm 3 8 in 10 mm 1 1 8 in 29 mm 1 1 8 in 29 mm 1 1 8 in 29 mm 7 8 in 22 mm 3 A in 19 mm 3 8 in 10 mm 1 1 8 in 29 mm 7 8 in 22 mm 7 8 in 048K Units 22 mm Table Ill Permissible Refrigerant Line Sizes The maximum vertical elevation between the heat pump and indoor coil is 50 ft Systems that require more elevation will need to have an oil trap installed in the vapor line Refer to Nordyne Application Guideline for Refrigerant Lines Over 75 Feet document 044B 0600 for piping details A filter drier is supplied with the heat pump It is required and recommended that it be installed near the indoor coil It is recommended to replace existing refrigerant lines that were previously used for an R 22 system If the lines are not replaced they must be properly flushed by a licensed EPA certified technician in accordance with the manufacturer s instructions and established procedures Brazing Use the appropriate safety equipment while brazing Items such as gloves safety glasses proper ventilation and a fire extinguisher should be used 1 Route the refrigerant lines from the indoor coil to the
29. ardware be performed prior to bringing it to the installation site Inspect for cosmetic as well as functional damage such as obvious holes or gaps in tubes and joints cut or pinched wires or wire insulation Confirm that the iQ heat pump unit package includes the following coil compressor control unit itself _a packet including these instructions and one filter drier NOTE The thermostat controller which is required for system operation is part of a separately purchased kit ELECTRICAL CONNECTIONS A WARNING ELECTRIC SHOCK HAZARD Disconnect all electrical power at main circuit box before wiring electrical power to the outdoor unit Failure to follow these instructions may result in electric shock or death Electrical Power Wiring Electrical power wiring shall comply with the current provisions of the National Electrical Code ANSI NFPA 70 as supplemented by applicable local building codes The installer should become familiar with the wiring diagram before making electrical connections to the outdoor unit An equipment wiring diagram is included in this instruction and inside the unit control panel cover Refer to the unit rating label located on the exterior of the control box cover for operating voltage minimum circuit ampacity and maximum fuse size See Table for wire sizing COPPER WIRE SIZE AWG 1 Voltage Drop Supply Wire Length Ft Supply Circuit Ampacity N Q b b
30. ary of the sequence for typical first operation to check out the system Reference is made to INSTALLER SETTINGS and SERVICE INFORMATION described above 1 Install system hardware as described in the individual component installation instructions Install power and control wiring to all system components including the controller in accordance with the iQ Field Wiring Installation Instructions Perform pre charge evacuation of field installed refrigerant lines as described in preceding sections Apply electrical power to the system including the heat pump The controller screen display backlight should come on and the iQ splash screen should appear If it does not trace the 24 vac control power to the R terminal on the thermostat CONFIGURATION NEEDED should appear on the top line of the Main Screen unless the thermostat had been previously used on a similar iQ system Proceed with System Configuration from the INSTALLER SETTINGS menu described above On the SYSTEM CONFIGURATION screen verify that the using size 2 ton 3 ton or 4 ton is correct as indicated If the wrong value is shown the inverter may require re initialization Contact the service representative of the distributor in this case Onthesame screen the entries under COMMUNICATION should be followed by OK If CHECK appears for a communication item go to the COMMUNICATION STATUS screen in the SERVICE INFORMATION menu des
31. completed All communications links in COMMUNICATION DATA should show OK All information displayed in the System Configuration screen should be accurate Abnormal If the display is not lit check that 24 vac is being provided between the R and C terminals in the thermostat s back connection plate If not trace the connection of all controller wires back to the indoor unit furnace or air handler Check that connections are in accordance with field wiring diagrams and instructions If a SERVICE NEEDED screen with a red backlight is displayed a fault has been detected A brief description of the fault is displayed on the screen Access to the FAULT STATUS screen is permitted If communication with the outdoor unit is OK but the unit size in tons shown on the System Configuration screen in wrong contact the service representative of the equipment distributor The inverter may not have undergone its initialization procedure performed at the factory 15 Outdoor Unit Inverter A WARNING ELECTRIC SHOCK HAZARD Disconnectpowerbeforeservicingtheoutdoor unit Failure to follow these instructions may result in electric shock or death Trouble shooting the outdoor unit may require that power be restored with the control panel cover removed Become familiar with the control panel and hazardous voltage areas before proceeding Time is required for inverter voltage to bleed down after removal of line power
32. cribed above and view which elements are not communicating Trace and check the three communication wires throughout the system If isolating a communication problem proves to be difficult it may be useful to disconnect all communication wires except those which link the thermostat and the non communicating element If COMMUNICATION STATUS was not checked during the previous step check it at this time All listed items should show a status of OK If any show BAD determine the source of the problem as indicated in the previous step and resolve 10 11 12 13 14 Set date and time as described above This will provide a time stamp for any fault which may arise during system checkout If the installation includes a new gas furnace check out its operation first This may be best accomplished from FURNACE TESTS under SERVICE TESTS from the INSTALLER SETTINGS menu see above Follow steps instructions provided in the furnace s installation instructions Be sure to verify blower operation during the test If the outdoor temperature is above 60 F 14 C test the refrigerant system running in cooling mode first If the outdoor temperature is between 12 and 60 F 11 and 14 C test the refrigerant system running in heating mode first This may best be accomplished from CHARGE MODE under SERVICE TESTS from the INSTALLER SETTINGS menu Follow the refrigerant charge adjustment procedure explained abov
33. d Indoor Unit One or Two Stage G7 Furnace Board Normal The red and green LEDs should be on steadily When the furnace is on and a flame is detected the amber LED should be on Abnormal The LEDs will provide a diagnostic code through their blink pattern Refer to furnace Installation Instructions for detailed troubleshooting Indoor Unit iQ Modulating Gas Furnace Board Normal The red LED should be on steadily The green LED near the top of the board should have a heartbeat blink consisting of a double blink followed by a pause repeated When the furnace is on and a flame is detected the amber LED should be on Abnormal The LEDs will provide a diagnostic code through their blink pattern Refer to furnace Installation Instructions for detailed troubleshooting If the green LED alone is not lit the board is not connected to the communication network properly Common Troubleshooting Issues Compressor Does Not Start Immediately For normal operation without changing modes of operation the compressor will not restart until 5 minutes the minimum off time have expired since it shut off last e minimum demand of 0 5 F is required before the heat pump heating or cooling will start up The system will wait 5 minutes following detection of a fault condition before attempting a restart Compressor Does Not Shut Off Immediately For normal operation without changing modes of operation the co
34. d accumulators and result in an over charged system If it is necessary to use this method follow up service should be scheduled when the temperature is above 60 F and then charge should be verified in cooling mode 1 Connect the gauge manifold to the liquid service valve and suction service port located at the left side of the access panel above the liquid service valve See Figure 8 2 Start the system in CHARGE MODE HEATING Allow the system to run 15 minutes to stabilize 3 Record the liquid refrigerant pressure in psig at the service valve 4 Record the liquid refrigerant temperature in F at the service valve 5 Using the temperature value recorded determine the corresponding liquid refrigerant pressure from the lower curve for heating in the charging chart Figure 9 6 If the pressure measured in step 3 is less than the required liquid refrigerant pressure determined in step 5 then refrigerant needs to be added 7 f the pressure measured in step 3 is greater than the required liquid refrigerant pressure determined in step 5 then the system is over charged 8 Addorremove charge from the system depending on the measurements recorded Allow the system to stabilize for 15 minutes before taking the next readings SYSTEM SETUP USING THE IQ CONTROLLER IMPORTANT It essential that the wires meant to provide 24 volts to the outdoor unit are not mistakenly connected to the communication terminals Check again befo
35. e Note that if a fault is determined in the outdoor equipment the backup heating means electric strip heat or gas furnace will start instead When charge adjustment is completed if required run the heat pump in both cooling and heating modes This may also be done using SERVICE TESTS although some diagnostic messages are disabled in that method Check the FAULT STATUS screen described above for any faults logged during the startup process Any message listed as ACTIVE FAULT refers to a condition which either still exists or occurred within the preceding 5 minutes Every fault or notification should appear in the FAULT HISTORY log which starts on the same screen The last 10 faults to have occurred are retained in this list Each new item pushes other logged faults down in the list The second line associated with each of the 10 entries includes the time and date of detection While the wording of fault messages is intended to provide a reasonable indication as to the responsible condition the information conveyed by the abbreviated wording is limited Consequently the installer should refer to training literature for further information in understanding fault messages If needed make use of information provided below under Troubleshooting What to Expect with Normal Operation Independently confirm operation of any accessories installed with the heat pump system following instructions provided with that equipment Compl
36. e mode This screen is primarily intended for test agency usage Heat pump run tests apply only to heat pump units Select OFF and SAVE B when finished e DISCRETE OUTPUTS When the unit is off this screen allows the user to operate certain relay driven outputs in the system for diagnostic purposes humidifier on the indoor interface board or blower control board reversing valve on the outdoor interface board indoor coil EXV on the indoor interface board or blower control board outdoor coil EXV on the outdoor interface board and crankcase heater on the outdoor interface board More than one of these can be set to ON at the same time Leaving the DISCRETE OUTPUTS screen will shut all of the listed outputs off The SERVICE INFORMATION Screens Typically when any of these service tests is being performed the serviceperson should check operation visually with special instrumentation if available and view operational data on the SERVICE INFORMATION screens Refer to iQ Drive training information for how to view these screens SERVICE INFORMATION FAULT STATUS COMPRESSOR STATUS OUTDOOR FAN STATUS INDOOR FAN STATUS FURNACE STATUS EMPERATURE STATUS EAR FAULT HISTORY T CL CALIBRATION DATA COMMUNICATION DATA CCFM DATA DEFROST STATUS CAPACITY CONTROL SELECT OPTION AW lt PREVIOUS Most of the items on the SERVICE INFORMATION menu are self explanatory by title Some key features are the following by item n
37. e the smart recovery option do the following From the Main Screen press the 4 or P gt key to select MENU at the bottom of the screen then press the Bl key to see the Main Menu Use the A or V key to select SETTINGS then press the key to enter the Settings menu Use the or V key to select OPTIONS then press the key to enter the Options screen Use the A or V key to select the value under SMART RECOVERY then press the ll key to allow changing the setting 13 Use the A or Y key to change the value between OFF the default and ON then press the ll key to save the setting Press the 4 key multiple times to return to the Main Screen System Operation Quick Start The following is a summary of the sequence for typical operation of the system 1 2 Set the date and time if not already set Check the program schedule for desired setback and modify if desired From the main screen check set the Fan operating mode e AUTO operates the fan indoor blower when the unit is cooling or heating This is the normal setting e ON operates the fan at the selected speed at all times The selected speed may change when the compressor electric heat or furnace is operating e PROGRAMMED FAN operates the fan in AUTO ON as specified in the program schedule From the main screen check set the Mode e COOL runs the heat pump as an air conditioner using the cooling set
38. ete the remainder of configuration settings and entries as specified above under Installer Settings and Other Configuration Entries SYSTEM DIAGNOSIS AND TROUBLESHOOTING The following is summary of normal and abnormal operation for typical startup to check out the system Reference is made to INSTALLER SETTINGS and SERVICE INFORMATION screens described above Refer to training literature for more details Diagnostic information for the heat pump can be obtained from all of the following sources e Controller displays Refer to training materials for interpretation of fault messages which appear on the Main Fault Status and Service Needed screens e Refrigerant system pressure and temperature measurements using standard field service instrumentation e LED indicator lights on each of the system s circuit boards see below Controller Normal As soon as 24 vac power is applied the blue backlight of the controller should light up The iQ splash screen will display the software version If the System Configuration procedure has not been performed yet for this system controller combination CONFIGURATION NEEDED will be displayed across the top alternating with other information If the system has a Type P blower motor shown on SYSTEM CONFIGURATION and INDOOR FAN STATUS screens used in air handlers or G6 gas furnaces the blower will self calibrate for 60 seconds as soon as System Configuration is
39. fferential furnace rise furnace G7 two stage gas 1 stage start differential 2 stage differential furnace furnace rise Modulating MQ gas Furnace rise furnace Table V System Configuration Entry Summary For MQ modulating iQ gas furnaces only an additional screen titled OUTDOOR SYSTEM will appear after the SYSTEM CONFIGURATION summary screen HEAT PUMP IQ should appear on the second line no other option may be selected in this screen Press the key to proceed OUTDOOR SYSTEM HEAT PUMP IQ CAPACITY TONS STAGES 2ND STG DIFFERENTIAL AIR FLOW CFM PER TON SELECT AW lt PREVIOUS CHANGE El NEXT P Proceed through the subsequent configuration screens either accepting or changing entries until the INSTALLER SETTINGS menu is displayed again This is an indication that configuration has been completed 2 Accessories Use the A or Y keys to select ACCESSORIES Press the key to enter the accessories submenus and screens This set of screens allows the installer to trigger alerts reminders when periodic maintenance is recommended for any of the following accessories e Air filter e Humidifier e U V lamp e Air cleaner If desired set the maintenance alert timing for any of these based on either hours of operation or calendar time When triggered by the passing of the selected time or operating hours the maintenance reminder message string will be displayed on the top of the Main Screen In
40. for field installed lines 15 ft in length with the matching indoor equipment Adjustments to the refrigerant charge will be required for other length and tube sizes For lines longer than 15 ft with a 3 8 OD liquid line add 0 52 oz per ft e Small variations the temperatures and pressures are normal due to differences in the installation e Large variations in the temperatures and pressures could indicate incorrect charge or another problem with a component in the system The preferred method of charging is by weighing in the additional refrigerant required If a charging scale is not available the next preferred charging method would be to use the sub cooling method in cooling mode 2 ton 3 ton 4ton 024K 036K 048K Factory Charge 10 7 lbs 12 7 lbs 12 7 lbs for 15 ft line set 171 oz 203 oz 203 oz 1 1 lbs 18 oz 1 1 lbs 18 oz 1 1 lbs 18 oz Additional Charge for 50 ft line set Additional Charge for 100 ft line set 2 8 lbs 44 oz 2 8 lbs 44 oz 2 8 lbs 44 oz Table IV Refrigerant Charge Quantities Alternate Procedure for Charging Heat Pump in Cooling Mode with outdoor temperatures above 60 F Based on Subcooling While charging based on weight is preferred this method is acceptable Use this method when the outdoor temperature is 60 F or higher to verify the correct charge in cooling mode The indoor temperature should be between 70 F and 80 F 1
41. he drain holes in the bottom of the unit are not obstructed Roof Mounting The method used for roof mounting should be designed so as not to overload roof structures nor transmit noise to the interior of the structure Refrigerant and electrical lines should be routed through suitably waterproofed openings to prevent leaking into the structure Make sure that the roof structure can adequately support the weight of the equipment Consult local building codes for rooftop installations Once a location has tentatively been selected trace routing of new or pre existing refrigerant lines two and power and control wiring See further discussion below maximum recommended length for refrigerant lines 100 feet maximum elevation difference compressor base to indoor coil base compressor higher 50 feet An oil trap is required for elevations exceeding 50 feet e maximum elevation difference compressor base to indoor coil base compressor lower 50 feet An oil trap is required for elevations exceeding 50 feet refrigerant lines should NOT be buried in concrete or otherwise Refer to Nordyne Application Guideline for Refrigerant Lines Over 75 Feet document 044B 0600 for piping details Once the above information has been confirmed and potential questions regarding location refrigerant line routing and wire routing have been resolved proceed with unpacking the equipment It is strongly recommended that inspection of the h
42. hese should not be cross wired If the green LED is blinking at a regular rate during heat pump heating it indicates that one of the two EXV sensors is reading out of range Refer to training literature for sensor interpretation and troubleshooting If the green LED is blinking at a non uniform rate heartbeat it indicates that the board has been placed in the Manual Mode Hold down the small black button on the board for more than 3 seconds to return it to automatic control mode Indoor Unit Interface Board in G6 iQ furnace kit or air handler Normal The red LED at the upper left of this board should do a heartbeat blink consisting of a double blink followed by a pause repeated Note 4 other LEDS towards the lower edge of the board When the equipment is off none of the LEDs should be on If the furnace or electric strip heat is on 3rd LED or 3rd and 4th LEDs from the right should be on first and second stage auxiliary heat When the unit is cooling the right most LED should be on EXV enabled to open If humidification is called for the 2nd LED from the right should be on Abnormal If no LEDs are lit on the board 24 vac control power is not being provided across the R and terminals Check for this voltage between the left most two screw terminals labeled R and C Indoor Unit EXV Board Normal The green LED at the upper left of this board should be steadily on except that a blink at a regular
43. mpressor will not shut off until 5 minutes the minimum run time have expired since it started last The Outdoor Fan Does Not Shut Off Whenthe Compressor Does For normal operation the outdoor fan is designed to run for 30 seconds after the compressor shuts off In Cooling the Blower Slows Down and the Unit Is Not Responding to Room Temperature e Slowing of blower speed and suspension of normal capacity control will occur when the unit goes into Dehumidification If conditions for dehumidification persist the unit will run cycles of 10 minutes in dehumidification 5 minutes in normal cooling responding to room temperature In Heating the Unit Appears to be Cooling During heat pump heating when the outdoor temperature is in the mid 30 s F or lower the unit will periodically go into a Demand Defrost operation After power to the controller is turned on the first defrost may occur as soon as 34 minutes after startup Subsequently defrost will be determined by outdoor coil temperature or by the maximum time between defrosts of 6 hours if the coil temperature is low enough In Heat Pump Heating the Furnace Runs At the Same Time e The indoor backup heating system will operate during defrost cycles See above item In Heating the Furnace or Electric Heat Runs Instead of the Heat Pump e The indoor backup heat equipment will run instead of the heat pump if a the outdoor air temperature is below the Minimum Heat
44. ocument 709031 provided in the iQ thermostat controller kit iQ Thermostat Controller Users Manual document 709063 provided in the iQ thermostat controller kit local wiring and building codes Nordyne Application Guideline for Refrigerant Lines Over 75 Feet document 044B 0600 TABLE OF CONTENTS PREPARATION u M 3 red re IPR NNI E TOTO OST 3 Rol MOUNINO cuanto ene ipud 3 ELECTRICAL CONNECTIONS iiti aaa cata tec a oes cta 3 Electrical Power Le 3 Control GIreuit Wiriliguu unn LENT 4 Recheck ha eit hn ec D at ct Pe cea sc ve vc epee Ee 4 REFRIGERANT LINE CONNECTIONS sisisiscttccscceccctcssscesecacncercuncdcecorecncascuseanmucenesncacerneacucecsmmaadcuosreumedeceezeanconanace 4 Design and OU ze ine D E 4 e O 5 System ESOS ee eee E cd Ot EN ae 5 Refrigerant Charging TR E Tom 5 Alternate Procedure for Charging Heat Pump in Heating Mode rr 6 Alternate Procedure for Charging Heat Pump in Cooling Mode rr 6 SYSTEM SETUP USING THE IQ CONTROLLER U u u aea u u pisa T 6 te 6 eras m 7 Muir uu uy suu
45. or Unit Interface Board right side small circuit board Normal Refer to Figure 13 The red LED at the upper left of this board should do a heartbeat blink consisting of a double blink followed by a pause repeated Note 4 other LEDS towards the lower edge of the board When the compressor is off the 3rd LED from the right should be on crankcase heater When the compressor is running in heating the 2nd LED from the right should be on EXV enabled to open When the unit is heating and in a defrost cycle the 1st and 4th LEDs from the right should be on 16 When the compressor is running in cooling the right most LED should be on reversing valve is energized Abnormal If no LEDs are lit on the board 24 vac control power is not being provided across the R and terminals Check for this voltage between the left most two screw terminals labeled R and C Outdoor Unit EXV Board left side small circuit board Normal Refer to Figure 14 The green LED at the upper left of this board should be steadily on except that a blink at a regular rate can be expected during cooling operation Abnormal If the green LED is not lit the EXV board is not getting 24 vac power from the interface board next to it Check for 24 vac between R and C on the interface board and check that the tabs marked R and C on the interface board are wired to R and C on the EXV board red and gray wires respectively T
46. point HEAT attempts to run the heat pump to provide heat using the heating setpoint If a the outdoor temperature is below the Heat Pump Usage Limit or b the heat pump cannot satisfy the load or c the heat pump is disabled due to a fault auxiliary backup heat will operate If backup heat is electric strip heat it may operate along with and supplementing the heat pump If backup heat is a gas furnace the furnace and heat pump will not operate at the same time except during defrost If the outdoor coil temperature is below 35 F demand defrost is enabled Under these conditions a first time defrost will occur after approximately one half hour of compressor operation Subsequent defrost cycles may be triggered by a drop in outdoor coil temperature or by a maximum time between defrosts of 6 hours Refer to training material for details e HEAT will run the auxiliary heat electric strip heat or gas furnace using the heating setpoint and disable the heat pump e OFF terminates any of the above Note that equipment may not shut off immediately after switching to OFF due to various system limitations 14 5 Once put into the OFF mode wait until the furnace or compressor has shut off before selecting another mode Adjust the operating setpoint if desired using a temporary hold pressing the or V key when the Main Screen is displayed System Startup Checkout and Troubleshooting The following is a summ
47. re you apply power General Power up the entire system with the iQ controller thermostat installed in its base The controller will be of use to the installer for the following general purposes e Configuring the system using INSTALLER SETTINGS screens required e Running system service tests recommended e Using service information screens to examine and diagnose system operation very helpful if needed e Setting options and features which are not typically used or understood by the homeowner recommended e Setting options and features with the homeowners oversight in an effort to train him her suggested The following descriptions of the controller apply specifically to software Version 5 0 A summary of the controller menu structure is provided in Figures 10 amp 11 NOTE This guideline is not intended to be a comprehensive substitute for proper iQ Drive system training required Screen Navigation Moving between option categories on menu screens or moving between possible values for any one option is done using the A and W keys The line or value with a dark background behind the characters is considered selected In order to change a selected option in most screens or to save a changed value use the ll key Use the 4 key to back up into the previous screen in the menu screen structure The Main Screen The Main Screen is the normal display viewed on the controller It prominently shows room temperature and
48. t the bottom of the screen then press the Bl key to see the Main Menu Use the A or V key to select SETTINGS then press the key to enter the Settings menu Use the A or V key to select OPTIONS then press the key to enter the Options screen The value under PROGRAM SCHED USAGE will be selected Press the Bl key to allow changing the setting Use the A or V key to change the value between NON PROGRAMMABLE 4 SCHED EVENTS DAY 2 SCHED EVENTS DAY and 2 EVENTS D BUSINESS Then press the key to save the setting The difference between 2 EVENTS D BUSINESS and 2 SCHED EVENTS DAY is only the name given to the time blocks within a daily schedule Press the 4 key multiple times to return to the Main Screen 5 Dehumidification When dehumidification is enabled as it is by default the system will depending upon the conditions suspend responding to room temperature and lower blower speed to enhance removal of moisture from the air circulating through the indoor coil When operating in this manner the unit will run cycles of 10 minutes dehumidifying 5 minutes normal cooling adjusting capacity See also setting the humidity setpoints in 6 below In order to change the dehumidification option do the following From the Main Screen press the key to select MENU at the bottom of the screen then press the Bl key to see the Main Menu Use the A or V key to select
49. tem configuration With the first line SYSTEM CONFIGURATION selected press the key to proceed through the system configuration screens The next screen titled SYSTEM CONFIGURATION provides a read only summary of the configuration as detected and otherwise showing either defaults or previously configured information SYSTEM CONFIGURATION OUTDOOR SYSTEM 2 TON HEAT PUMP IQ WITH 1 STG GAS FURNACE B BLOWER TYPE COMMUNICATION INDOOR UNIT OK OUTDOOR UNIT OK lt PREVIOUS The words under OUTDOOR SYSTEM and WITH describe the system components as automatically detected by the controller Both entries under COMMUNICATION should show OK If CHECK appears it is an indication that either communication wiring is incomplete or incorrect or the outdoor unit is not powered up Proceed through subsequent screens by using either the D indicated by NEXT The following table indicates the information that may be or needs to be manually configured or confirmed by the installer Information not listed is automatically determined If necessary check the ratings of the indoor unit before proceeding Items Requiring Manual Configuration or Confirmation Heat type number of stages staging differentials kW G6 gas furnace Heat type number of stages 1 stage start differential furnace input rate furnace rise If 2 stage 2 stage differential G7 single stage gas 1 stage start di
50. the Bl key to allow changing the setting UsetheA or V key to change the value 2 F increments then press the ll Key to save the setting Press the 4 key multiple times to return to the Main Screen 2 Auto Changeover Time This adjustment enables AUTO mode which allows the System to automatically switch between heating and cooling without having to touch the controller Autochangeover time is the delay minimum time between the end of cooling operation and the beginning of heating operation or the reverse DISABLE removes AUTO as an available mode Otherwise the time may be selected from 15 to 120 minutes default 60 minutes In order to modify the value do the following From the Main Screen press the 4 or P gt key to select MENU at the bottom of the screen then press the lll key to see the Main Menu Use the A or V key to select SETTINGS then press the H key to enter the Settings menu Use the A or V key to select OPTIONS then press the key to enter the Options screen Use the A or Y key to select the value under AUTO CHANGEOVER TIME then press the Bl key to allow changing the setting Use the or V key to change the value then press the key to save the setting Press the 4 key multiple times to return to the Main Screen 3 Date and Time Setting date and time early in the installation process not only saves the homeowner from having to do it but provides an 1
51. wing From the Main Screen press the key to select RH at the bottom of the screen then press the Il key to see the Humidity screen The current setpoints are displayed As indicated at the bottom of the screen press the P gt key to enter the Humidity Settings screen HUMIDITY SETTINGS HUMIDIFY 45 DEHUMIDIFY 50 SELECT AW CHANGE BM lt PREVIOUS Use the A or V key to select the RH setting to change then press the ll key to allow changes e Use the A or V key to change the RH setting then press the key to save the setting The configurable ranges for HUMIDIFY and DEHUMIDIFY are different and changing one may push the other so that a minimum of 596 is maintained between the settings The humidify setpoint can be set in the range 30 to 45 in increments of 5 The dehumidify setpoint can be set in the range 35 to 70 in increments of 5 Press the ll key to save any changes Press the 4 key multiple times to return to the Main Screen 7 Smart Recovery When Smart Recovery is enabled the system will start changing the cooling or heating setpoint in advance of a schedule change so that the room temperature is at or near the setpoint of the subsequent schedule time block when that time block begins It only applies if the subsequent cooling setpoint is lower or heating setpoint in higher Also if PROGRAM SCHED USAGE is set to NON PROGRAMMABLE this option does not apply In order to chang
52. wing clearances a A minimum of 18 inches must be provided between each of the four sides and any solid barrier or wall which might block free inlet air flow into the coil A minimum clearance of 36 inches is required between multiple units b The corner of the unit covered by the control access cover must be clear enough to allow comfortable access by a serviceperson c The top of the unit must be open and unobstructed to prevent recirculation of outdoor fan discharge air particularly for air conditioning usage A minimum distance of 4 feet overhead clearance is recommended Do not locate the unit in a pit with high walls on all sides Locate the unit away from overhangs which would allow water runoff or ice to fall directly onto the heat pump Avoid placing the unit near sidewalks or walkways to avoid possible icing from defrost cycles In low temperature climates place the unit where it is not directly in prevailing winds Avoid placing the heat pump near sleeping quarters or windows As the unit goes through defrost cycles a change in sound will occur Slab Mounting The preferred unit mounting is on an outdoor slab concrete or plastic on the ground in an area with good drainage unlikely to be affected by heavy runoff ground settling or deep snowdrift accumulation The support slab should be level If the area is subject to heavy snowfall or drift accumulation the use of a snow stand is recommended as well Make sure that t
53. wires to the indoor unit and for description of other indoor field wiring including to the controller Five 5 wires must be run between the indoor unit and the outdoor unit 2 for 24 VAC power and 3 for communications Use one shielded cable 3 or more conductors for communications only and a separate cable or pair of wires for control power Refer to wiring diagram Figure 4 and Table Il 1 Pass the 5 control wires into the hole in the lower right side of the control panel of the outdoor unit into the separate low voltage wiring compartment See Figures 5 and 6 2 Locate the 5 corresponding factory wired leads with stripped ends Assure that each of these 5 wires on the factory wiring side of the wire connections loops around and through the donut toroidal choke Refer to Figure 7 which shows one wire making a single loop 3 Connect each of the 5 field run wires to its factory wired counterpart using a wire nut as indicated in Figures 4 5 and 6 4 Replace the control panel cover before applying power Outdoor Interface Board Terminal RHS circuit Indoor Interface Board plug wire color Indoor Interface Board Terminal Outdoor unit wire color 3 pin 3 wire white connector plug at RHS circuit board terminal INDOOR Control Power Wiring R screw no tactory RED wire C screw no factory wire Table Il Control Wiring to Outdoor iQ Heat Pump Unit A IMPORTANT It is critical that
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