T4BF-KA Split System Heat Pump - eNora
Contents
1. CSH4BF024KB MSH4BF024KB FT4BF 024KB PSH4BF 024KB 43 43 43 43 43 45 45 30 1 2 30 3 4 30 3 4 30 3 4 30 3 4 31 1 4 31 1 4 30 1 2 DT4BF 036KA 30 3 4 ET4BF 036KA 30 3 4 JT4BF 036KA 30 3 4 CSH4BF036KA 30 3 4 MSH4BF036KA 31 12. 5 Defrost Test 11 Locating the Heat 5 Anti Short Cycle Timer 11 Packaging 5 Heating sss 11 Ground Level m tette 5 Cooling de rada 11 Roof 5 Optional 11 Connecting Refrigerant Tubing between the Component Functions 11 Indoor 8 Outdoor Unit eee eee eens 6 Component Functions ern 11 Electrical Wiring 6 Replacement Parts eccentric 11 Pre scena 6 Unit Dimensions 12 cp E PEE Figure 5 Unit 12 Thermostat 7 Cooling Charging Charts ciis CEU TUE PRU T3 Outdoor Unit 7 Figure 6 Cooling Chart for 2 Ton ES T Control Circuit 7 Figure 7 Cooling Chart for 3 Ton Units DE 13 Comfort Alert Diagnostics 7 Figure 8 Cooling Chant for 4 Ton Units MEE 24VAC Power Wiring s Figur
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4. CD D Air Handler Heat Pump OD Section Figure 3 Typical 2 Stage Heat Pump w Optional Outdoor Thermostat and Variable Speed Air Handler Optional equipment requiring connection to the power or control circuits must be wired in strict accordance of the NEC ANSI NFPA 70 applicable local codes and the instructions provided with the equipment Grounding WARNING The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if an electrical fault should occur Do not use gas piping as an electrical ground This unit must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 or the CSA C22 1 Electrical Code Use the grounding lug provided in the control box for grounding the unit Thermostat Connections Thermostat connections should be made in accordance with the instructions supplied with the thermostat and the indoor equipment The outdoor unit is designed to operate from a 24 VAC Class II control circuit The control circuit wiring must comply with the current provisions of the NEC ANSI NFPA 70 and with applicable local codes having jurisdiction The low voltage wires must be properly connected to the units low voltage terminal block Figure 3 Recommended wire gauge and wire lengths for typical thermostat con
5. JON E s10jonpuoo 1eddoo esn Ajddns 104 2 19 Mod Je 281 1 SALON INVYSVIGC ONIYIM Figure 16 Wiring Diagram for 4 amp 5 Ton Premium Ultra Premium Models FT4BF 048KA PSH4BF 048KA 4 Ton Models 5 Ton Models PSHABF 060KA 060KA FTABF 21 COMFORT ALERT TROUBLESHOOTING Status LED Status LED Description Status LED Troubleshooting Information Module has power Supply voltage is present at module terminals Compressor protector is open Check for high head pressure Check compressor supply voltage Outdoor unit power disconnect is open Compressor circuit breaker or fuse s is open Broken wire or connector is not making contact Low pressure switch open if present in system Compressor contactor has failed open Thermostat demand signal Y is present but compressor is not running TRIP Red LED Low refrigerant charge Evaporator blower is not running Check blower relay coil and contacts Check blower motor capacitor Check blower motor for failure or blockage Check evaporator blower wiring and connectors Check indoor blower control board Check thermostat wiring for open circuit Evaporator coil is frozen Check for low suction pressure Check for excessively low thermostat setting Check evaporator airflow coil blockages or return airfilter Check ductwork or r
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7. 036KA Figure 15 Wiring D 20 6080 0996012 eA eA SAY YMS ensseJd UBIH SdH YoUMS 55 MOT 541 plouajos Jossaidwog 959 Jayeay eseoxuel2 HOO 10102000 99 peioeuuoo SI ZA eui pue uoi Z JOU SI A WOU LON YOLOW NV 1431Y IHOJWOO NI 9SNIN3dO JHL HONOWHL 3UIM SIHL 3100H 5 1H3 1V 1IHOJINOO NI ONINSdO S IHL HONOUHL DS SIHLILNOY ZH 09 eseug AO0 c 80c OVA 21 gt JONUOD FOVLIOA MOT 6 user 1H3 1V MOlI9A suni semje 55 5 HOLOVLNOO 8 apo usel4 1H37V PNO eis jueun NNY N3do Z user 14 97 uni Ajuo jueun 1915 N3dO 9 usel4 LHATV Tinto Nido 5 989 uv MOIRA 51007 v 99 LUSTY MOIRA Ajuo 105591000 ONITDAD LHOHS P09 USEIH LH31V 1055 10 jo ensseJd 10 10 dIHLIYNSSIYd WALSAS 2 ysel 1 e oKo uns Buruuni si 40ssejduio2 usei4 1H831V
8. The outdoor unit requires both power and control circuit electrical connections Refer to the wiring diagram schematic for identification and location of outdoor unit field wiring interfaces or see Figures 11 16 pages 16 21 Make all electrical connections in accordance with all applicable codes and ordinances Overcurrent protection must be provided at the branch circuit distribution panel and sized as shown on the unit rating label and according to applicable local codes See the unit rating plate for minimum circuit ampacity and maximum overcurrent protection limits Provide power supply for the unit in accordance with the unit wiring diagram and the unit rating plate Connect the line voltage leads to the terminals on the contactor inside the control compartment Useonly copper wire for the line voltage power supply to this unit as listed in Table 1 page 6 Use proper code agency listed conduit and a conduit connector for connecting the supply wires to the unit Use of rain tight conduit is recommended e 208 230 Volt units are shipped from the factory wired for 230 volt operation For 208V operation remove the lead from the transformer terminal marked 240V and connect it to the terminal marked 208V Thermostat NOTE Jumper G RW2 W1 amp W2 together Q for shorter staging time N CTY 7 5 D A
9. Assemblies of indoor coils and outdoor units not listed are not recommended To properly charge these units 1 Read all Installation Instructions first 2 Complete any brazing operations e g Split system line sets 3 Leak check and evacuate the whole system using proper methods 4 Purge the nitrogen holding charge 5 Evacuate the unit to 350 500 microns 6 Allow the unit to remain under vacuum for at least 30 min 7 Weigh In the proper amount of new or reclaimed R 410A refrigerant Refer to Table 2 or the units rating label to determine the correct amount of charge Refrigerant charging charts are applicable only to matched assemblies of NORDYNE equipment and listed airflows for the indoor coil Refer to Figures 6 9 pages 13 14 and Table 2 for correct system charge Outdoor units with indoor coils not listed are not recommended Deviations from rated airflows or non listed combinations may require modification to the expansion device and refrigerant charging procedures for proper and efficient system operation The refrigerant charge can be checked and adjusted through the service ports provided external to the outdoor unit Use only gage line sets which have a Schrader depression device present to actuate the valve Table 2 Split System Heat Pump Charge Charging an R 410A system in AC mode at outdoor temperatures above 55 1 With the system operating at steady state measure the liquid refr
10. 4 FT4BF 036KA 31 1 4 PSH4BF 036KA 43 43 43 43 43 45 45 30 1 2 30 3 4 30 3 4 30 3 4 30 3 4 31 1 4 31 1 4 30 1 2 DTABF 048KA 30 3 4 ET4BF 048KA 30 3 4 JT4BF 048KA 30 3 4 CSH4BF048KA 30 3 4 MSH4BF048KA 31 1 4 FT4BF 048KA 31 1 4 PSH4BF 048KA 43 43 43 43 43 45 45 30 1 2 30 3 4 30 3 4 30 3 4 30 3 4 31 1 4 31 1 4 30 1 2 DTABF 060KA 30 3 4 ET4BF 060KA 30 3 4 JT4BF 060KA 30 3 4 CSH4BFO60KA 30 3 4 MSH4BFO60KA 31 1 4 FT4BF 060KA 31 1 4 PSH4BF 060KA 43 43 43 43 43 45 45 30 1 2 30 3 4 30 3 4 30 3 4 30 3 4 31 1 4 31 1 4 30 1 2 30 3 4 30 3 4 30 3 4 30 3 4 Figure 5 Unit Dimensions 31 1 4 31 1 4 COOLING CHARGING CHARTS refrigerant when above curve Co Co eo o x 5 o o x 3 Add refrigerant when bel 70 75 80 385 90 95 100 105 110 11 Liquid Temperature F Figure 6 Charging Chart for 2 Ton Units Remove refrigerant when above curv N 4 C2 09 Liquid Pressure psig Co eo o 275 Add refrigerant when
11. INSTALLER Please read all instructions before servicing this equipment Pay attention to all safety warnings and any other special notes highlighted in the manual Safety markings are used frequently throughout this manual to designate a degree or level of seriousness and should not be ignored WARNING indicates a potentially hazardous situation that if not avoided could result in personal injury or death CAUTION indicates a potentially hazardous situation that if not avoided may resultin minor or moderate injury or property damage A WARNING Shut off all electrical power to the unit before performing any maintenance or service on the system Failure to comply may result in personal injury or death A WARNING Unless noted otherwise in these instructions only factory authorized parts or accessory kits may be used with this product Improper installation service adjustment or maintenance may cause explosion fire electrical shock or other hazardous conditions which may result in personal injury or property damage WARNING Please follow all charging instructions for maximum unit performance and efficiency Some local codes require licensed installation service personnel to service this type of equipment Refrigerant charging must be done by qualified personnel familiar with safe and environmentally responsible refrigerant handling procedures Under no circumstances should the owner attempt to install and or service this
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13. Rotor Yellow LED ALERT Flash Code 5 Open Circuit Yellow LED ALERT Flash Code 6 Yellow LED Open Start Circuit Current only in run circuit ALERT Flash Code 7 Yellow LED Open run circuit Current only in start circuit ALERT Flash Code 8 Yellow LED ALERT Flash Code 9 Yellow LED Welded Contactor Compressor always runs Low Voltage Control circuit lt 17VAC Short Cycling Compressor Thermostat demand signal is intermittent Low line voltage contact utility if voltage at disconnect is low Excessive liquid refrigerant in compressor Compressor bearings are seized Run capacitor has failed Low line voltage contact utitlity if voltage at disconnect is low Check wiring connections Excessive liquid refrigerant in compressor Compressor bearings are seized Measure compressor oil level Outdoor unit power disconnect is open Compressor circuit breaker or fuse s is open Compressor contactor has failed open Check compressor contactor wiring and connectors Check for compressor contactor failure burned pitted or open Check wiring and connectors between supply and compressor Check for low pilot voltage at compressor contactor coil High pressure switch is open and requires manual reset Open circuit in compressor supply wiring or connections Unusually long compressor protector reset time due to extreme ambient temperature Compressor windings are
14. equipment Failure to comply with this warning could result in property damage personal injury or death A CAUTION This unit uses R 410A refrigerant DO NOT use any other refrigerant in this unit Use of another refrigerant will damage the unit A WARNING The information listed below must be followed during the installation service and operation of this unit Unqualified individuals should not attempt to interpret these instructions or install this equipment Failure to follow safety recommendations could result in possible damage to the equipment serious personal injury or death The installer must comply with all local codes and regulations which govern the installation of this type of equipment Local codes and regulations take precedence over any recommendations contained in these instructions Consult local building codes and the National Electrical Code ANSI CI for special installation requirements All electrical wiring must be completed in accordance with local state and national codes and regulations and with the National Electric Code ANSI NFPA 70 or in Canada the Canadian Electric Code Part 1 CSA C 22 1 This equipment contains liquid and gaseous refrigerant under high pressure DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING Installation or servicing should only be performed by qualified trained personnel thoroughly familiar with this type equipment Fully annealed refrigerant
15. esn 104 sep 1ueuienbiun ze o dui3 2 punou 061 ey suiejs s ejqeins JON 2 ap juo s1019npuoo 1eddoo asn suonoeuuoo Ajddns 104 2 jue e jueJnoo 5 12euuoosiq L SALON ue 4 paeds pue 15 duing INVH9VIG 9NIHIM iagram for 3 Ton Standard Models DT4BF 036KA ET4BF 036KA JT4BF 036KA CSHABF036KA MSH4BF036KA ing D Ir W igure 12 F 17 0170 0210114 seoejdey VLLOLLA ane SAY uoiMg eunsseJd UBIH SdH einsseJd MOT Sd1 prouejos 959 aseoyUeID HOO 100 101261002 99 YOLOW MOTT3A ZH 09 eseud ajbuls AO0 C 80c 3OVLETOA 5 HOSN3S QN3931 5 o WV WOO 5 LI lt x e LL 1s0u43a 24d o NNOH8 ammeg xv 18 MOTIAA IWLSOWHSHL OL HOSSSYdWOO WNIWHAL ei LL P 1 HOLOVLNOO MOTI3A Figure 13 Wiring Diagram for 4 amp 5 Ton Standard Models DT4BF 048KA ET4BF 048KA
16. monitoring device and cannot control or shut down other devices 24 VAC Power Wiring The Comfort Alert module requires a constant nominal 24 VAC power supply The module cannot be powered by the C terminal on a defrost board or other control board without experiencing nuisance alerts NOTE The wiring to the module s R amp C terminals must be routed directly from the indoor unit or thermostat Ifthe constant 24 VAC wire is not present in the outdoor unit use one of the spare wires in the thermostat cable to bring power to the module Connect the other end of the spare wire to R at the indoor unit or thermostat Thermostat Demand Wiring The Comfort Alert module requires athermostat demand signal to operate properly The thermostat demand signal input labeled Y on the module should always be connected to the compressor contactor coil NOTE When the coil is energized the demand signal input is 24 VAC When the coil is not energized the demand signal input should be less than 0 5 VAC NOTES Factory installed modules have different thermostat demand signal wiring Always follow manufacturer wiring instructions when replacing the module e After the thermostat demand signal is connected verify that 24 VAC across Y amp C when demand is present Interpreting the Diagnostic LED s When an abnormal system condition occurs the Comfort Alert module displays the appropriate ALERT and or TRIP LED will flash
17. other side either drill a 0 149 hole in the panel and use the existing fastener or use a Self drilling fastener to secure the other side of the transformer START UP amp ADJUSTMENTS Pre Start Check List X Verify the indoor unit is level and allows proper condensate drainage X Verify the outdoor coil and top of the unit are free from obstructions and debris and all equipment access control panels are in place Verify air filters are cleaned and properly installed Verify duct work is sealed to prevent air leakage Verify line voltage power leads are securely connected and the unit is properly grounded Verify low voltage wires are securely connected to the correct leads on the low voltage terminal strip Verify power supply branch circuit overcurrent protection is sized properly Verify the thermostat is wired correctly 2 2 2 Start Up Procedures The thermostat s function mode should be setto OFF and the fan mode should be set to AUTO Close all electrical disconnects to energize the system Air Circulation Indoor Blower CAUTION These units have a crankcase heater factory installed Wait 24 hours prior to startup to allow for heating ofthe compressor crankcase Failure to comply may result damage and could cause premature failure of the system 1 Set the thermostat system mode on OFF and the fan mode to ON 2 Verify the blower runs continuously Check the air delivery atthe supply
18. registers and adjust register openings for balanced air distribution If insufficient air is detected examine ductwork for leaks or obstructions 3 Set the thermostat fan mode to AUTO and verify the blower stops running System Cooling 1 the thermostat s system mode to COOL and the fan mode to AUTO Gradually lower the thermostat temperature setpoint below room temperature and verify the outdoor unit and indoor blower energize 2 Verify blower wheel is spinning in direction indicated by arrow Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature Listen for any unusual noises If unusual sounds occur determine the source of the noise and correct as necessary 3 Verify HI and LO refrigerant pressures 4 Allow the system to operate for several minutes and then set the temperature selector above room temperature Verify the fan and compressor cycle off with the thermostat NOTE The blower should also stop unless fan mode is set to the ON position System Heating optional 1 If heating equipment furnace air handler is provided with the system lower the thermostat setpoint temperature to the lowest temperature setting and change the thermostat s system mode to HEAT 2 Gradually increase the thermostat s setpointtemperature to the maximum setting 3 Verify the optional heating equipment furnace electric heat and indoor blower energize Feel the air bei
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22. OUTDOOR SPLIT SYSTEM HEAT PUMP USER S INFORMATION INSTALLATION INSTRUCTIONS TWO STAGE R 410A 16 SEER MODELS ABOUT THE HEAT PUMP Your heat pump is a unique all weather comfort control appliance that will heat and cool your home year round and provide energy saving comfort It s an unknown fact that heat is always in the air even when the outside temperature is below freezing The heat pump uses this basic law of physics to provide energy saving heat during the winter months For example If the outdoor temperature is 47 F 8 C your heat pump can deliver approximately 3 5 units of heat energy per each unit of electrical energy used as compared to a maximum of only 1 unit of heat energy produced with conventional heating systems In colder temperatures the heat pump performs like an air conditioner run in reverse Available heat energy outside the home is absorbed by the refrigerant and exhausted inside the home This efficient process means you only pay for moving the heat from the outdoors to the indoor area You do not pay to generate the heat as with more traditional furnace designs During summer the heat pump reverses the flow of the heat absorbing refrigerant to become an energy efficient central air conditioner Excess heat energy inside the home is absorbed by the refrigerant and exhausted outside the home HEAT PUMP MAINTENANCE N CAUTION Shut off all electrical power to the unit before performing any maint
23. a number of times consecutively pause and then repeat the process To identify a Flash Code number count the number of consecutive flashes Each time the module powers up the last ALERT Flash Code that occurred prior to shut down is displayed for one minute The module will continue to display the LED until the condition returns to normal or if 24 VAC power is removed from the module See Table 4 page 21 for flash code identification or Table 5 page 23 for module wiring troubleshooting LED Description POWER LED Green indicates voltage is present at the power connection of the module ALERT LED Yellow communicates an abnormal system condition through a unique flash code NOTE The ALERT LED will flash consecutively pause and then repeat the process The number of consecutive flashes referred to as the Flash Code correlates to a particular abnormal condition Detailed descriptions of these ALERT Flash Codes are listed in Table 4 TRIP LED Red indicates a demand signal is received from the thermostat but current to the compressor is not detected by the module The TRIP LED typically indicates if the compressor protector is open or the compressor has no power The scroll compressor s run C common and S start wires are routed through the holes in the Comfort Alert module marked C amp S NOTE The common wire does not need to be routed through the module for it to operate Outdoor Fan Mo
24. below curve 250 eee ee eee eH 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F Figure 7 Charging Chart for 3 Ton Units COOLING CHARGING CHARTS CONTINUED refrigerant when above curve wo A C o 5 o o n 5 5 Add refrigerant when bel 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F Figure 8 Charging Chart for 4 Ton Units Remove refrigerant when above curve Liquid Pressure psig Add refrigerant when below curve 70 75 80 385 90 295 100 105 110 115 120 125 Liquid Temperature F Figure 9 Charging Chart for 5 Ton Units D Q 2 5 E HEATING CHARGING CHART Remove refrigerant when above curve Add refrigerant when fk fel tel E below curve 65 70 75 80 85 90 Liquid Temperature F Figure 10 Heating Charging Chart WIRING DIAGRAMS 0170 0021114 ane SAY YyoUMs eunsseJd UBIH SdH YMS 8JnssaJg
25. damaged Check compressor motor winding resistance Run capacitor has failed Open circuit in compressor start wiring or connections Check wiring and connectors between supply and the compressor S terminal Compressor start winding is damaged Check compressor motor winding resistance Open circuit in compressor run wiring or connections Check wiring and connectors between supply and the compressor R terminal Compressor run winding is damaged Check compressor motor winding resistance Compressor contactor has failed closed Thermostat demand signal not connected to module Control circuit transformer is overloaded Low line voltage contact utility if voltage at disconnect is low Check wiring connections Flash code number corresponds to a number of LED flashes followed by a pause and then repeated Trip and alert LED s flashing at same time means control circuit voltage is too low for operation Table 4 LED Diagnostics Continued 23 COMFORT ALERT TROUBLESHOOTING CONTINUED Miswired Module Indication Recommended Troubleshooting Action Green LED is not on module does not power up Green LED intermittent module powers up only when compressor runs Trip LED is on but system and compressor check OK TRIP LED and ALERT LED flashing together ALERT Flash CODE 3 displayed incorrectly Compressor short cycling ALERT Flash Code 5 6 or 7 displayed incorrectly Open Circuit Open Sta
26. e 9 Cooling Chart for 5 Ton Units 14 Thermostat Demand g Heating Charging Chart sess 15 Interpreting the Diagnostic 8 Figure 10 Heating 15 LED Description sees 8 Wiring Diagrams eren 16 Outdoor Fan MOLIOR eicit ite 8 Figure 11 Standard Models 2 Ton 16 Optional Equipment sen 8 Figure 12 Standard Models 3 Ton 17 Transformer Upgrade 8 Figure 13 Standard Models 4 8 5 18 Startup amp Adjustments Figure 14 Premium Ultra Models 2 Ton 19 Pre Start Ch dkdisL correre 9 Figure 15 Premium Ultra Models Ton 20 Staltup Procedires ci rene tati iced 9 Figure 16 Premium Ultra Models 4 amp 5 Ton 21 Air Circulation Indoor Blower 9 Comfort Alert Troubleshooting Charts 22 System HEALING coge ades toco ia 9 Table 4 LED Diagnostics ritate 22 System Coolifig ueniret titre 9 Table 5 Module Wiring Troubleshooting 24 IMPORTANT SAFETY INFORMATION
27. e will de energized f the coil temperature is below the Terminate Temperature election setting the defrost cycle will continue for 14 minutes or until the coil temperature rises above the Terminate Temperature selection setting NOTE Short the TEST pins for 1 second or more to force the control out of defrost and back to heating mode reversing valve de energized Compressor will turn on immediately ifthe REMOVE FOR NO DELAY jumper is removed Ifthe REMOVE FOR NO DELAY jumper is installed the compressor will energize immediately following a 30 second delay NOTE If the Y2 thermostat input is energized 2 stage system the second stage will turn on If the above steps will not initiate a defrost replace the defrost board Anti Short Cycle Timer Test The 3 minute time delay feature can be bypassed by shorting the TEST pins together Heating Mode When the TEST pins are shorted together for more than 1 second the control will switch between defrost mode and heating mode as described in the Defrost Test Procedure section Cooling Mode When the TEST pins are shorted together for more than 1 second the Anti Short Cycle Timer will be bypassed Optional Equipment A functional checkout should be performed in accordance with the checkout procedures supplied with the equipment COMPONENT FUNCTIONS Comfort Alert Diagnostics The Comfort Alert diagnostics module troubleshoots heat pump and air conditioning sy
28. ea to be conditioned must be calculated and a system of the proper capacity selected It is recommended that the area to be conditioned be completely insulated and vapor sealed V Check the electrical supply and verify the power supply is adequate for unit operation The system must be wired and provided with circuit protection in accordance with local building codes If there is any question concerning the power supply contact the local power company The indoor section air handler furnace etc should be installed before routing the refrigerant tubing Refer to the indoor unit s installation instructions for installation details All units are securely packed at the time of shipment and upon arrival should be carefully inspected for damage prior to installing the equipment at the job site Verify coil fins are straight If necessary comb fins to remove flattened or bent fins Claims for damage apparent or concealed should be filed immediately with the carrier Please consult your dealer for maintenance information and availability of maintenance contracts Please read all instructions before installing the unit Locating the Heat Pump e Survey the job site to determine the best location for mounting the outdoor unit See Figure 5 page 12 for unit dimensions Overhead obstructions Figure 2 poorly ventilated areas and areas subject to accumulation of debris should be avoided e Sufficient clearance for unobstruct
29. ed airflow through the outdoor coil must be maintained in order to achieve rated performance See Figure 2 for minimum clearances to obstructions Consideration should be given to availability of electric power service access noise and shade Packaging Removal To prevent damage to the tubing connections carefully remove the carton and user s manual from the equipment Discard the shipping carton Ground Level Ground level installations must be located according to local building codes or ordinances and these requirements Clearances must be in accordance with those shown in Figure 2 suitable mounting pad must be provided and separate from the building foundation The pad must be level and strong enough to support the weight of the unit The slab height must be a minimum of 2 5 cm above grade and with adequate drainage See Figure 2 Roof Mount The method of mounting should be designed so that it does not overload roof structures or transmit noise to the interior ofthe structure The roof mustbe structurally capable of handling the weight of the unit Full perimeter support is required under the unit Support must be made of weather resistant materials and installed prior to unit installation The support must be built to raise the unit 6 above the roof 6 from Building or Structure 24 for Service Access 12 or 18 See Note DO NOT OBSTRUCT 1 TOP OF UNIT NOTE Units require full
30. egisters for blockage Faulty metering device Check TXV bulb installation size location and contact Check if TXV fixed orifice is stuck closed or defective e Condenser coil is dirty Liquid line restriction filter drier blocked if present in system Thermostat is malfunctioning Solenoid plug not connected Y2 not wired at Comfort Alert Check thermostat sub base or wiring for short circuit Check thermostat installation location level Comfort Alert failure ALERT Long Run Time Compressor Flash Code 1 is running extremely long run Yellow LED cycles High head pressure Check high pressure switch if present in system Check if system is overcharged with refrigerant Check for non condensable in system Discharge or suction Condenser coil poor air circulation dirty blocked damaged Condenser fan is not running Check fan capacitor Check fan wiring and connectors Check fan motor for failure or blockage Return air duct has substantial leakage compressor overloaded f low pressure switch present in system check Flash Code 1 information System Pressure Trip ALERT Flash Code 2 Yellow LED pressure out of limits Table 4 LED Diagnostics 22 COMFORT ALERT TROUBLESHOOTING CONTINUED Status LED Status LED Description Status LED Troubleshooting Information ALERT Flash Code 3 Yellow LED is running only briefly ALERT Flash Code 4 Locked
31. enance Failure to comply may result in personal injury or death Proper maintenance is most important to achieve the best performance from the appliance and should be performed by a qualified service technician at least once a year Read the maintenance items below and follow the instructions for years of safe trouble free operation Regular Cleaning N WARNING Do not place combustible material on or against the unit cabinet Do not place combustible materials including gasoline and any other flammable vapors and liquids in the vicinity of the unit Clean or replace the indoor air filter at the start of each heating and cooling season and when an accumulation of dust and dirt is visible on the air filter e Remove any leaves and grass clippings from around the coil of the outdoor unit being careful not to damage the aluminum fins e Check and remove any obstructions such as twigs sticks etc WARRANTY INFORMATION A warranty certificate with full details is included with the heat pump Carefully review these responsibilities with your dealer or service company The manufacturer will not be responsible for any costs found necessary to correct problems due to improper setup improper installation adjustments improper operating procedure on the part of the user etc Some specific examples of service calls which are not included in the limited warranty are Correcting wiring problems in the electrical circuit supplyi
32. ese instructions and sound installation practices to insure reliable system operation and longevity The maximum recommended interconnecting refrigerant line lengths is 75 ft and the vertical COPPER WIRE SIZE AWG 1 Voltage Drop Supply Wire Length Feet Supply Circuit Ampacity Wire Size based on N E C for 60 type copper conductors Table 1 Copper Wire Size elevation difference between the indoor and outdoor sections should not exceed 20 ft To maintain the unit s warranty it is required that a filter drier be installed when the system is open to the atmosphere This includes but is not limited to replacing the evaporator and or condenser of a system The filter drier must be installed in strict accordance with the manufacturer s installation instructions Optional equipment such as liquid line solenoid valves low ambient etc should be installed in strict accordance with the manufacturer s installation instructions ELECTRICAL WIRING A WARNING To avoid risk of electrical shock personal injury or death disconnectall electrical power to the unit before performing any maintenance or service The unit may have more than one electrical supply Label all wires prior to disconnection when servicing the unit Wiring errors can cause improper and dangerous operation All electrical connections must be in compliance with all applicable local codes and ordinances and with the current r
33. evision of the National Electric Code ANSI NFPA 70 For Canadian installations the electrical connections and grounding shall comply with the current Canadian Electrical Code CSA C22 1 and or local codes Pre Electrical Checklist Verify that the voltage frequency and phase of the supply source match the specifications on the unit rating plate X Verify that the service provided by the utility is sufficient to handle the additional load imposed by this equipment Refer to the unit wiring label for proper voltage wiring Verify factory wiring is in accordance with the unit wiring diagram or Figures 11 16 pages 16 21 Check for loose connections Line Voltage Awiring diagram is located on the inside cover of the electrical box of the outdoor unit The installer should become familiar with the wiring diagram before making any electrical connections to the outdoor unit An electrical disconnect must be located within sight of and readily accessible to the unit This switch shall be capable of electrically de energizing the outdoor unit Line voltage to the unit should be supplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the unit Incoming field wiring and minimum size of electrical conductors and circuit protection must be in compliance with information listed on the outdoor unit data label Any other wiring methods must be acceptable to authority having jurisdiction
34. grade copper tubing should be used when installing the system Refrigerant suction line tubing should be fully insulated Installation of equipment may require brazing operations Installer must comply with safety codes and wear appropriate safety equipment safety glasses work gloves fire extinguisher etc when performing brazing operations This unit is designed for outdoor installations only and should be located as descibed on page 5 Follow all precautions in the literature on tags and on labels provided with the equipment Read and thoroughly understand the instructions provided with the equipment prior to performing the installation and operational checkout of the equipment HEAT PUMP INSTALLATION General Information Split system heat pumps are designed only for outdoor rooftop or ground level installations This unit has been tested for capacity and efficiency in accordance with AHRI Standards and will provide many years of safe and dependable comfort providing it is properly installed and maintained Abuse improper use and or improper maintenance can shorten the life of the appliance and create unsafe hazards To achieve optimum performance and minimize equipment failure it is recommended that periodic maintenance be performed on this unit The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools Before You Install this Unit The cooling load of the ar
35. he unit when ordering replacement parts Electrical Capacitors Temperature Limit Switches Compressors Thermostats Contactors Time Delay Relays Pressure Switches Transformers Relays Motors Blower Motor Fan Motor Components Blower Assembly Cabinet Panels Expansion Valves Fan Grille Filter Driers DT4BF 024KB ET4BF 024KB UNIT DIMENSIONS DO NOT OBSTRUCT TOP OF UNIT Allow adequate clearance for airflow JT4BF 024KB
36. igerant pressure in psig at the outdoor unit service valve 2 Measure the liquid refrigerant temperature in Fahrenheit at the service valve 3 Determine the required liquid refrigerant pressure Refer to Table 2 for correct system charge f the pressure measured in Step 1 is greater than the required liquid refrigerant pressure determined in Step 3 then there is too much charge in the system Remove refrigerant and repeat Steps 1 through 3 until the system is correctly charged e f the pressure measured in Step 1 is less than the required liquid refrigerant pressure determined in Step 3 there is too little charge in the system Add refrigerant and repeat Steps 1 through 3 until the system is correctly charged Short Cycle Protection Charging an R 410A Unit in Heating Mode 1 Evacuate the refrigerant system 2 Weigh inthe proper charge per Table 2 using the Heating Charging Chart Figure 10 page 15 as a guide Unit charge MUST be verified in cooling season 3 Verify the unit is operating properly Short Cycle Protection 1 With the system operating in COOLING mode record the setpoint temperature setting of the thermostat 2 Gradually raisethe setpointtemperature untilthe outdoor unit and indoor blower de energize 3 Immediately lower the setpoint temperature of the thermostat its original setting and verify that the indoor blower is energized and that the outdoor unit remains de energized 4 After a
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38. l falls below 0 5VAC when off Review Thermostat Demand Wiring page 10 for Y amp C wiring Table 5 Module Wiring Troubleshooting INSTALLER PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER US DESIGN D_ amp ASSEMBLED We Encourage Professionalism uten lb LISTED ENCE om Through Technician Certification by NATE Intertek NORDYNE COMPLETE COMFORT GENUINE VALUE CERTIFIED www ahridirectory org Unitary Small HP AHRI Standard 210 240 Certification applies only when the complete system is listed with AHRI YOUR ENVIRONMENT OUR EXPERTISE v MEMBER COMPANY Specifications amp illustrations subject to change without notice or incurring obligations O Fallon MO Printed in U S A 02 12 HRAI 709263B Replaces 709263
39. lop a coating of snow and ice on the heattransfer coil This is normal and the unit will defrost itself This unit features Adaptive Demand Defrost that monitors ambient and coil temperatures to regulate the defrost function accordingly At the beginning of the defrost cycle both the outdoor condenser fan and compressor will turn off After approximately 30 seconds the compressor will turn on and begin to heat the outdoor coil causing the ice and snow to melt NOTE While the ice and snow is melting some steam may rise from the outdoor unit as the warm coil causes the melting frost to evaporate When defrost is completed the outdoor fan motor will start and the compressor willturn off again In approximately 30 seconds the compressor will start up again and continue normal operation Operating the Heat Pump for Automatic Cooling amp Heating 1 Set the thermostat system switch to AUTO and the thermostat fan switch to AUTO See Figure 1 NOTE Thermostats will vary Some models will not include the AUTO mode and others will have the AUTO in place of the HEAT and COOL and some will include all three 2 Set the thermostat temperature to the desired heating and cooling temperature level s The outdoor unit and the indoor blower will then cycle on and off in either the heating or cooling mode of operation as required to automatically maintain the indoor temperature within the desired limits Operating the Indoor Blower Continu
40. nections are listed in Table 2 The thermostat should be mounted about 5 feet above the floor on an inside wall DO NOT install the thermostat on an outside wall or any other location where its operation may be adversely affected by radiant heat from fireplaces sunlight or lighting fixtures and convective heat from warm air registers or electrical appliances Refer to the thermostat manufacturer s instruction sheet for detailed mounting and installation information Comfort Alert Diagnostics Module Select Models Only The Comfort Alert Diagnostics Module Figure 5 page 8 is a breakthrough innovation for troubleshooting heat pump and air conditioning system failures The module installs easily in the electrical box of the outdoor unit near the compressor contactor By monitoring and analyzing data from the Copeland scroll compressor and the thermostat demand the module can accurately detect the cause of electrical and system related failures without any sensors A flashing LED indicator communicates the ALERT code and a diagnostic key is also imprinted on the side of the module to quickly direct the technician to the root cause of a problem NOTE This module does not provide safety protection The Comfort Alert Diagnostics g POWER LED Green SM Diagnostics Key N L Lt gt L P Li N ALERT LED Yellow gt Figure 4 Comfort Alert Diagnostics Module Module is a
41. ng the heat pump Resetting circuit breakers or other switches Adjusting or calibrating of thermostat IMPORTANT Please read this information thoroughly and become familiar with the capabilities and use of your appliance before attempting to operate or maintain this unit Keep this literature where you have easy access to it in the future If a problem occurs check the instructions and follow recommendations given If these suggestions don t eliminate the problem call your servicing contractor The Installation Instructions are primarily intended to assist qualified individuals experienced in the proper installation of this appliance Some local codes require licensed installation service personnel for this type of equipment Please read all instructions carefully before starting the installation DO NOT DESTROY PLEASE READ CAREFULLY amp KEEP IN A SAFE PLACE FOR FUTURE REFERENCE USER S INFORMATION OPERATING INSTRUCTIONS Please refer to the thermostat manufacturer s User manual for detailed programming instructions Cooling Operation Only 1 Set the thermostat s system mode to COOL or AUTO and change the fan mode to AUTO See Figure 1 2 Setthe temperature selector to the desired temperature level The outdoor fan compressor and blower motor will all cycle on and off to maintain the indoor temperature at the desired cooling level NOTE If the temperature level is re adjusted or the System mode is rese
42. ng circulated by the indoor blower and verify that it is warmer than ambient temperature Listen for any unusual noises If unusual sounds occur determine the source of the noise and correct as necessary NOTE Other sources for heating electric furnace fossil fuel furnace air handler with electric heat options etc that interface with the heat pump should be functionally checked to verify system operation and compatibility with the heat pump Refer to the installation instructions for this equipment and perform a functional checkout in accordance with the manufacturer s instructions Adjustment of Refrigerant Charge CAUTION Split system equipment contains liquid and gaseous refrigerant under pressure Adjustment of refrigerant charge should only be attempted by qualified trained personnel thoroughly familiar with the equipment Under no circumstances should the homeowner attemptto install and or servicethis equipment Failure to comply with this warning could result inequipment damage personal injury or death NOTES The unit must be charged while both first and second stages are operating Toachieverated capacity and efficiency the compressor must be exposed to refrigerant for least 24 hours prior to running and then must be run for a minimum of 12 hours The Refrigerant Charging Charts Figures 6 10 pages 13 15 are applicable to listed assemblies of equipment and at listed airflows for the indoor coil
43. ously Thecontinuous indoor blower operationis typically used to circulate the indoor air to equalize atemperature unbalance due to a sun load cooking or fireplace operation Set the thermostat fan mode to ON Figure 1 The indoor blower starts immediately and will run continually until the fan mode is reset to AUTO The continuous indoor blower operation can be obtained with the thermostat system mode set in any position including OFF Shutting the Heat Pump Off Change the thermostat s system mode to OFF and the fan mode to AUTO See Figure 1 NOTE The system will not operate regardless of the temperature selector setting Temperature Selector Figure 1 Digital Thermostat INSTALLER INFORMATION ONLY Important Safety Information 4 Adjustment of Refrigerant 9 Pressures Within the System 4 Charging an R 410A System in AC Mode at Labels Tags and Precautions esse 4 Outdoor Temperatures above 55 10 Brazing Operations see 4 Charging R 410A Unit in Heat Mode 10 Heat Pump Installation eene 5 Short Cycle Protection 10 General Information eseeeenee 5 Defrost Cycle Control iau ice dien 10 Before You Install this
44. perimeter clearances Installer must maintain 18 between two units or 12 between single unit and structure LU Mounting Pad E Figure 2 Clearance Requirements Connecting Refrigerant Tubing Between the Indoor amp Outdoor Unit A CAUTION This system uses R 410A refrigerant with POE oil When servicing cover or seal openings to minimize the exposure of the refrigerant system to air to prevent accumulation of moisture and other contaminants After outdoor and indoor unit placement has been determined route refrigerant tubing between the equipmentin accordance with soundinstallation practices When connecting refrigerant linesets together it is recommended that dry nitrogen be flowing through the joints during brazing to prevent internal oxidation and scaling Refrigerant tubing should be routed in a manner that minimizes the length of tubing and the number of bends in the tubing If precise forming of refrigerant lines is required a copper tubing bender is recommended Avoid sharp bends and contact of the refrigerant lines with metal surfaces e Refrigerant tubing should be supported in a manner that the tubing will not vibrate or abrade during system operation Tubing should be kept clean of foreign debris during installation Every effort should be made by the installer to ensure that the field installed refrigerant containing components of the system have been installed in accordance with th
45. pproximately 3 minutes verify that the outdoor unit energizes and the temperature of the air supplied to the facility is cooler than ambient temperature Defrost Cycle Control The defrost cycle is controlled by an Adaptive Demand Defrost algorithm that monitors coil temperature and ambient temperature Other features of the of the demand defrost board include 4 Field selectable defrost termination temperatures 50 F 80 F coil temperature Field selectable compressor delay feature High pressure and low pressure switches Sensing of second stage compressor demand Test speed up capability Anti short cycle timer 3 minutes for compressor protection On board diagnostics with flashing LED for quicker troubleshooting See Table 3 e Control is uncalibrated when power is applied Calibration occurs after a defrost cycle The control initiates this sacrificial defrost after 34 minutes of accumulated compressor run time in heating with coil temperature below 35 F The defrost cycle terminates if coil sensor reaches selected termination temperature or after 14 minutes defrost DIAGNOSTIC DESCRIPTION LED STATUS Control Fault No Power Off On 1 Flash 2 Flashes 3 Flashes 4 Flashes 5 Flashes Table 3 Control Diagnostic Normal Operation ASCD Delay Active with compressor demand Low Pressure Switch Lockout High Pressure Switch Lockout Ambient Sensor Fault Coil Sensor Fault Def
46. rost function is disabled if coil temperature is above 35 F If Ambient sensor is detected as open or shorted demand defrost will not operate and control will revert to time temperature defrost operation If the outdoor coil sensor is detected as open or shorted the control will not perform demand or time temperature defrost operation NOTE When the defrost cycle initiates there will be a 30 second compressor delay going into and out of the defrost cycle This delay may be removed by removing P6 connector on the board This 2 stage unit will defrost in second stage regardless of the stage called for by the thermostat NOTE All units are shipped from the factory with the default termination temperature set at 70 F Defrost Test Procedure 1 Terminals R C must have 18 30VAC present between them in order for defrost sequences to be initiated 2 With heat mode thermostat demand Y connected to short and hold the TEST pins together This will energize reversing valve to initiate a forced defrost NOTE This will bypass the ASCD and allow the high stage compressor to come on immediately if the REMOVE FOR NO DELAY jumper at P6 is removed If the REMOVE FOR NO DELAY jumper at P6 is installed the compressor will energize immediately following a 30 second delay 3 Remove the short on the TEST pins f the Coil temperature is above the Terminate Temperature selection setting the defrost cycle will be terminated reversing valv
47. rt Circuit or Open Run Circuit ALERT Flash Code 6 Open Start Circuit displayed for Code 7 Open Run Circuit or vice versa ALERT Flash Code 8 displayed incorrectly Welded Contactor Determine if both amp C module terminals are connected Verify voltage is present at module s R amp C terminals Determine if R amp Y terminals are wired in reverse Verify modules R and C terminals have a constant source Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Verify 24VAC is present across Y amp C when thermostat demand signal is present If not R amp C are reversed wired Verify R and C terminals are supplied with 19 28VAC Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Verify the compressor run and start wires are routed through the module s current sensing holes Verify the Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Verify the compressor run and start wires are routed through the correct module sensing holes Determine if module s Y terminal is connected Verify Y terminal is connected to 24VAC at contactor coil Verify 24VAC is present across Y amp C when thermostat demand signal is present If not R and C are reversed wired Verify voltage at contactor coi
48. stem failures and accurately detects the cause of electrical and system related failures without any sensors A flashing LED indicator communicates the ALERT code to quickly direct the technician to the root cause of a problem Low Pressure Switch A low pressure switch is factory installed and located internally on the suction line of the outdoor unit The switch is designed to protect the compressor from a loss of charge by interrupting the thermostat inputs to the unit If the suction pressure falls below 5 psig the switch will open and de energize the outdoor unit The switch will close again when the suction pressure increases above 20 psig NOTE When the switch opens and then closes there is a 3 minute short cycling delay before the outdoor unit will energize Under normal conditions the switch is closed High Pressure Switch A high pressure switch is factory installed and located internally on the compressor discharge line of the outdoor unit If the discharge pressure rises above 650 psig the switch will open and de energize the outdoor unit The switch will close again after the discharge pressure decreases to 460 psig NOTE When the switch opens and then closes there will be a 3 minute short cycling delay before the outdoor unit will energize Under normal conditions the switch is closed REPLACEMENT PARTS Replacement parts are available through all Nordyne distributors Please have the complete model and serial number of t
49. t the fan and compressor in the outdoor unit may not start immediately A protective timer circuit holds the compressor and the outdoor fan off for approximately three minutes following a previous operation or the interruption of the main electrical power Heating Operation Only 1 Set the thermostat s system mode to HEAT or AUTO and change the fan mode to AUTO See Figure 1 2 Setthetemperature selector to the desired temperature level The compressor outdoor fan and blower motor will cycle on and off to maintain the indoor temperature at the desired heating level NOTE If the temperature level is re adjusted or the System mode is reset the fan and compressor in the outdoor unit may not start immediately A protective timer circuit holds the compressor and the outdoor fan off for approximately three minutes following a previous operation or the interruption of the main electrical power Emergency Heat Some thermostats may include a system mode called EM HT or AUX HT etc This is a back up heating mode that should only be used if a problem is suspected With the mode set to EM HT etc the compressor and outdoor fan will be locked off and supplemental heat electric resistance heating will be used as a source of heat Sustained use of electric resistance heat in place of the heat pump will result in an increase in electric utility costs Defrost Operation During cold weather heating operation the outdoor unit will deve
50. tor If the unit utilizes a 2 speed condenser fan motor this motor will operate on low speed when in low cooling and on high speed when in high cooling A relay within the control area switches the fan motor from low to high speed using the call for high cooling as the trigger Other models that utilize BLDC fixed torque variable speed fan motors will not require a relay Optional Equipment Optional equipment requiring connection to the power or control circuits must be wired in strict accordance with current provisions of the NEC ANSI NFPA 70 with applicable local codes having jurisdiction and the installation instructions provided with the equipment Optional Equipment low ambient control hard start kits etc should be installed in strict accordance with the manufacturers installation instructions Transformer Upgrade Kit If this 2 stage heat pump is installed in conjunction with a gas furnace and fossil fuel kit the furnace transformer MUST be upgraded to one with a 60 VA rating or using the transformer upgrade kit 904077 To upgrade the transformer Remove the existing transformer and install the new 60 VA transformer Remove the 3 amp fuse on the furnace control board and install the 5 amp fuse provided NOTE The new transformer may be larger than the existing transformer that is mounted in the furnace If this happens mount the 60 VA transformer using one of the mounting holes in the furnace panel On the
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