Installation Instructions - A
Contents
1. USER INFORMATION 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 will turn off again In approximately 30 seconds the compressor will start up again and continue normal operation Operating the Heat Pump for Automatic Cooling and Heating 1 Set the thermostat system switch to AUTO and the thermostat fan switch to AUTO See Figure 1 NOTE Thermostat styles vary Some models will not include the AUTO mode and others will have the AUTO in place of the HEAT and COOL Others may include all three Refer to the instructions supplied with your thermostat for specific instructions 2 Set the thermostat temperature to the desired temperature level 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 Continuously The continuous indoor blower operation is typically used to circulate the indoor air to equalize a temperature unbalance due to a sun load cooking or firep2. Troubleshooting eere 4 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 supplying the Heat Pump Resetting circuit breakers or other switches e Adjusting or calibrating of thermostat INSTALLER INFORMATION Important Safety Information 5 Heat Pump Installation 6 General Intormation neee 6 Before You Install this Unit 6 Locating the Heat Pump 6 Packaging Removal ssiiiisiisiiisiirnneriiisisisniiinaais 6 Ground Level 6 Connecting Refrigerant Tubing between the Indoor amp Outdoor Unit 7 Electrical Wiring 7 Pre Electrical Checklist eeesesessssss 7 Biel EE 7 GlOUNGIN O s ductos har der nn 8 Thermostat Connections s eerren 8 Startup amp Adjustments esses 9 Pre Start Checklist c cccccesseeeesseseeeeesestteeeeeeeee 9 Start up Procedures AA 9 Air Circulat
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6. A Se COMPLETE COMFORT GENUINE VALUE Specifications amp illustrations subject to change without notice or incurring obligations O Fallon MO Printed in U S A 09 10 7092420 Replaces 708452D
7. Handler Thermostat G RW2C EO Y 00000090 Air Handler Heat Pump OD Section Typical Heat Pump with Outdoor Thermostat and Air Handler Figure 4 Typical Thermostat Connections protection must be in compliance with information listed onthe outdoor unit data label Any other wiring methods must be acceptable to authority having jurisdiction 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 Figure 13 page 23 Make all electrical connections in accordance with all applicable codes and ordinances Overcurrent protection must be provided atthe 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 forthe unitin 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 Use only copper wire for the line voltage power supply tothis unitas listed in Table 1 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 208 230 Volt units are shipped from the factory wired for 230 vo
8. JT5BD Series 13 SEER USER S MANUAL INSTALLATION INSTRUCTIONS SPLIT SYSTEM HEAT PUMP R 22 CE My yy vie E OL v Ye MYM YY uh Ge E SS AN LL M 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 inthe proper installation ofthis 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 AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE USER INFORMATION Important Safety Information 3 About the Heat Pump 3 Operating Instructions 3 Cooling Operati assas ne reete ees 3 Heating Operation 3 Emergency Heat recette ea 3 Defrost Operation 3 Operating the Heat Pump for Automatic Cooling amp Heatihgsi siniese iniia 4 Operating the Indoor Blower Continuously 4 Turning the Heat Pump Off 4 Heat Pump Maintenance 4 Regular Cleaning 4
9. Sold duet ons l u9siq 1 aun1vuadWal YOOGLNO ueis s pefueuoJepun ue ejeoipui senjeA peueuo uey 1912016 sainyeredwe ebseudsiq Z 4 ul seinjeiedue US pue Bisd posi ee seinsseid y L i sainyesadwia qing m Duuejue Jo ging fap Buuejue moj Jre 100pino ji enjeA UBISep Woy Area Wun enssejd uonong senjeA uDisep pereu Suonipuoo pepoo ejeoipur sexoq pepeus T AGOW 9NILV3H S3 18VL 9NISHVHO INVH3914134 20 suun uo p dung 1eeH seues 48r0 das1r 10 ejqe BuiBseyd 91 eiqer L t Le cl 9c Scl Sc os e cc su pos ve oor ser ce LE 0 SS ld dw L SS ld duet Ssoid duet SS ld ssaJg duet SS ld duet ssaid SS ld ons u siq ons u siq ons uosiq pinbr1 ons uosiq ons uosig ons u9sIq 4 aun1vHadWal YOOGLNO suum UO er dung 33H seues yzr0 aaslfr 10 ejqez BuiBsey et ejqer Can esr 691 991 CHL SS9Jd Ssoid SSOld dw ssoid pinbr uosig pinbr 0 4 SHUNLWHAdINAL YOOGLNO ueis s pefueuoJepun ue ejeoipui senjeA peueuo uey 1912016 saunyeredwe ebseuosiq Z 4 ul seinjeiedue e pue Bisd pas ee seinsseid y LU en sainyesadwia ging m Duuejue 10 ging Ap Buuejue moj 118 100pino ji enjeA UBISep Woy Area Wun enssejd uonong senjeA
10. ant Tubing Between the Indoor amp Outdoor Unit A CAUTION This system uses R 22 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 sound installation 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 e 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 e Tubing should be kept clean of foreign debris during installation e Every effort should be made by the installer to ensure thatthe field installed refrigerant containing components of the system have been installed in accordance with these instructions and sound installation practices to insure reliable system operation and longevity The maximum recommended interconnecting refrigerantline lengths is 75 ft and the vertical elevation
11. d remove any obstructions such as twigs Sticks etc TROUBLESHOOTING If the unit fails to operate check the following Thethermostatis properly set See Cooling Operation for air conditioning or Heating Operation for furnace The unit disconnect fuses are in good condition and the electrical power to the unit is turned on INSTALLER INFORMATION IMPORTANT SAFETY INFORMATION 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 result in minor or moderate injury or property damage 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 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 A WARNING JT5BD Split S
12. difference between the indoor and outdoor sections should not exceed 20 ft COPPER WIRE SIZE AWG 1 Voltage Drop Supply Wire Length Feet Supply Circuit Ampacity a ajeje ojJajo o Wu O1 oJ ojnm 9 lc ojo A Wire Size based on N E C for 60 type copper conductors Table 1 Copper Wire Size e 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 e 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 tothe 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 e All electrical connections must be in compliance with all applicable local codes and ordinances and with the current revision of the National Electric Code ANSI NFPA 70 For Canadian installations the electrical connections and grounding shall comply w
13. e curve Liquid Pressure psig Liquid Temperature F Figure 8 Charging Chart for 2 5 Ton Units 12 Liquid Pressure psig Liquid Pressure psig JT5BD 036K Charging Chart l ow curve 115 120 125 130 135 Liquid Temperature F Figure 9 Charging Chart for 3 Ton Units JT5BD 042K Charging Chart Remove re Liquid Temperature F Figure 10 Charging Chart for 3 5 Ton Units 13 JT5BD 048K Charging Chart Remove refrigerant when above curve ot Add refrigerant when below curve 105 110 2 o a o x o o o xz n 3 E l Liquid Temperature F Figure 11 Charging Chart for 4 Ton Units JT5BD 060K Charging Chart Liquid Temperature psig Liquid Temperature F Figure 12 Charging Chart for 5 Ton Units 14 REFRIGERANT CHARGING TABLES COOLING MODE HHS Shaded boxes indicate flooded conditions L Rated design values The suction pressure will vary from design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 1 All pressures are listed in psig and all temperatures in F 2 Discharge temperatures greater than charted values indicate an undercharged system 3 In Cooling Mode suction pressure wil
14. ealer for maintenance information and availability of maintenance contracts Please read all instructions before installing the unit EE 18 OBSTRUCT TOP OF UNIT 18 Figure 2 Clearance Requirements Locating the Heat Pump Survey the job site to determine the best location for mounting the outdoor unit See Figure 5 page 11 for unit dimensions e Overhead obstructions poorly ventilated areas and areas subject to accumulation of debris should be avoided e Sufficient clearance for unobstructed 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 NOTE To prevent damage to the tubing connections carefully remove the carton and users 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 e Clearances must be in accordance with those shown in Figure 2 A suitable mounting pad Figure 3 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 Figure 3 Ground Level Installation Connecting Refriger
15. ed 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 Restrictor Bore Size inches Indoor Outdoor Table 3 13 SEER Split System Heat Pump Orifice 10 HEAT PUMP MAINTENANCE WARNING To prevent electrical shock personal injury or death disconnect all electrical power to the unit before performing any maintenance or service The unit may have more than one electrical supply Proper maintenance is important to achieve optimum performance from the Heat Pump The ability to properly perform maintenance on this equipment requires certain mechanical skills and tools If you do not possess these skills contact your dealer for maintenance Consult your local dealer aboutthe availability of maintenance contracts Routine maintenance should include the following Inspect and clean or replace air filters at the beginning of each heating and cooling season or more frequently if required Inspect the condensate drain and outdoor coil at the beginning of each cooling season Remove any debris Clean the outdoor coil and louvers as necessary using amild detergent and water Rinse thoroughly with water Inspect the electrical connections for tightness at the beginning of each heating and cooling season Service as necessary A CAUTION The unit should never be operated without a filter inthe return air system Rep
16. fy 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 Refrigerant Charging A WARNING JT5BD Split System Heat Pumps leave the factory with a nitrogen holding charge DO NOT operate any unit while it contains a Nitrogen holding charge Doing so may damage the units compressor Follow these 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 equipment Failure to comply with this warning could result in property damage personal injury or death 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 22 refrigerant Refer to Table 3 or the units rating label to determine the correct amount of charge e Refrigerant charging charts are applicable o
17. h 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 Thisequipmentcontains liquid and gaseous refrigerant underhigh 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 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 6 e 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 The JT5BD series Heat Pump is designed only for outdoor rooftop or ground level installations This unit has been tested for capacity and efficiency in accordance with A H R I Standards and will provide many years of safe and dependable comfort providi
18. ing Mode charge should be weighed in It is strongly recommended to verify charge in Cooling Mode at ambient above 70 F OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 164 167 165 165 180 162 169 168 182 167 196 164 185 170 212 166 Table 10 Charging Table for JT5BD 060K Series 5 Ton Units 18 suun UO Z dung 9H seues VHPZO GESLP 10 e1qez BuiBiey9 zi eger re Pam Poe e perc cs rs pep ssaid duet ons uosiq SSaJd ssaJd duel ong l uosiq ssoid duia ons uosiq ssoid duie ons uosiq ssoid duiej SseJd ons uosiq pinbr3 ssoid duel ong yosiq 4 SHNLVYAdWAL YOOGLNO suum UO GL dung 3H sanas H810 QaSir 40 ejqez BuiBiey9 L ejqer EE Fa vl PG c Les on a S9 8el CL gt Sle 9 evi LZ 291 80c CH 9v OZ 74 LOC L9 ed SS ld dw L ons uosiq AEN saineiodue qinq 19M Buuaque 10 EZZ 60c S61 881 L8L 4g et 96b zv ste rer 86 sor zor ez SS EAR CH vs eet veh Sv 6LL L t C a ert 9z 99 ser orz 9s vel ret ov zi 92 ze omt LOL g 622 x Eres sc pw fen 3 es oct ost ev eet co
19. ion Indoor Blower 9 System Cooling EE 9 System Heatinmg 9 Refrigerant Charging 9 Charging R 22 Units in AC Mode with Outdoor Temperatures Above 55 F 10 Heat Pump Maintenance 10 Replacement Parts 10 N Figures amp Tables eene 11 Figure 5 Unit Dimensions 11 Refrigerant Charging Charts a 11 Figure 6 JT5BD 018K 1 5 Ton Units 11 Figure 7 JT5BD 024KA 2 Ton Units 12 Figure 8 JT5BD 030KA 2 5 Ton Units 12 Figure 9 JT5BD 036K 3 Ton Units 13 Figure 10 JT5BD 042K 3 5 Ton Units 13 Figure 11 JT5BD 048K 4 Ton Units 14 Figure 12 JT5BD 060K 5 Ton Units 14 Refrigerant Charging Tables Cooling Mode 15 Table 4 JT5BD 018K 1 5 Ton Units 15 Table 5 JT5BD 024KA 2 Ton Units 15 Table 6 JT5BD 030KA 2 5 Ton Units 16 Table 7 JT5BD 036K 3 Ton Units 16 Table 8 JT5BD 042K 3 5 Ton Units 17 Table 9 JT5BD 048K 4 Ton Units 17 Table 10 JT5BD 060K 5 Ton Units 18 Refrigerant Charging Tables Heating Mode 19 Table 11 JT5BD 018K 1 5 Ton Units 19 Table 12 JT5BD 024KA 2 T
20. ith the current Canadian Electrical Code CSA C22 1 and or local codes Pre Electrical Checklist V Verify that the voltage frequency and phase of the supply source match the specifications on the unit rating plate See Table 18 page 24 V Verify that the service provided by the utility is sufficient to handlethe additionalload imposed by this equipment Refer to the unit wiring label for proper voltage wiring X Verify factory wiring is in accordance with the unit wiring diagram or Figure 13 page 23 Inspect for loose connections Line Voltage A wiring 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 7 Thermostat G RW2C E O Y 0090000 NOTE Jumper betweenW2 and E is required when no OD T Stat is used Orange W2 a For 2 Stage Heater Kits Black D C A Air Handler Heat Pump OD Section Typical Heat Pump with Standard Air
21. l be lower than design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 4 In Heating Mode charge should be weighed in It is strongly recommended to verify charge in Cooling Mode at ambient above 70 F OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 150 153 162 152 175 150 166 155 177 154 189 151 181 157 Table 4 Charging Table for JT5BD 018K Series 1 5 Ton Units OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 153 155 171 156 184 155 175 159 186 159 198 158 190 162 213 161 Table 5 Charging Table for JT5BD 024KA Series 2 Ton Units 15 REFRIGERANT CHARGING TABLES COOLING MODE ES Shaded boxes indicate flooded conditions L Rated design values The suction pressure will vary from design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 1 All pressures are listed in psig and all temperatures in F 2 Discharge temperatures greater than charted values indicate an undercharged system 3 In Cooling Mode suction pressure will be lower than design value if indoor air flo
22. lace disposable filters with the same type and size Do not attempt to add additional oil to motors unequipped with oil tubes The compressor is hermetically sealed at the factory and does not require lubrication REPLACEMENT PARTS Replacement parts are available through all Nordyne distributors Please have the complete model and serial number of the 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 Fan Grille Cabinet Panels Filter Driers Expansion Valves FIGURES amp TABLES DO NOT OBSTRUCT TOP OF UNIT Allow adequate clearance for airflow REISE EERSTEN Figure 5 Unit Dimensions REFFRIGERANT CHARGING CHARTS JT5BD 018K Charging Chart Remove refrigerant when above curve EE 0 Li RE F Liquid Pressure psig Add refrigerant when below curve 90 95 100 105 Liquid Temperature F Figure 6 Charging Chart for 1 5 Ton Units 11 JT5BD 024KA Charging Chart S5 o a o i 2 o Vd o LA n z 2 g l nt when below curve Liquid Temperature F Figure 7 Charging Chart for 2 Ton Units JT5BD 030KA Charging Chart Remove refrigerant when abov
23. lace 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 Turning 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 HEAT PUMP MAINTENANCE N CAUTION Shut off all electrical power to the unit before performing any maintenance Failure to comply may result in personal injury or death Proper maintenance is most importantto achieve the best performance from the appliance and should be performed by a qualified service technician atleast 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 e 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 notto damage the aluminum fins Check an
24. lt operation For 208V operation remove the lead from the transformer terminal marked 240V and connect it to the terminal marked 208V 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 e Thermostatconnections 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 Il 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 4 Recommended wire gauge and wire lengths for typical thermostat connections are listed in Table 2 The thermostat should be mounted about 5 feet ab
25. ly 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 is the case with more traditional furnace designs During summer the heat pump reverses the flow of the heat absorbing refrigerantto become an energy efficient central air conditioner Excess heat energy inside the home is absorbed by the refrigerant and exhausted outside the home System Mode Temperature Selector Figure 1 Digital Thermostat OPERATING INSTRUCTIONS Please refer to the thermostat manufacturer s User manual for detailed programming instructions Cooling Operation 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 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 5 minutes following a
26. ng 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 V The cooling load of the area to be conditioned must be calculated anda system ofthe proper capacity selected It is recommended that the area to be conditioned be completely insulated and vapor sealed Y 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 V 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 V Allunitsare securely packed atthe 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 V Please consult your d
27. nly to matched assemblies of NORDYNE equipment and listed airflows for the indoor coil Refer to Figures 6 12 pages 11 14 and Tables 4 10 pages 15 18 for correct system charging e JT5BD 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 Charging an R 22 system in AC mode at outdoor tem peratures above 55 F for optimized sub cooling of 10 F 12F 1 With the system operating at steady state measure the liquid refrigerant pressure in psig at the outdoor unit service valve 2 Measure the liquid refrigerant temperature in Fahrenheit at the service valve 3 Determinethe required liquid refrigerant pressure Refer to Tables 11 17 pages 19 22 for correct system charging e 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 If the pressure measured in Step 1 is less than the required liquid refrigerant pressure determin
28. on Units 19 Table 13 JT5BD 030KA 2 5 Ton Units 20 Table 14 JT5BD 036K 3 Ton Units 20 Table 15 JT5BD 042K 3 5 Ton Units 21 Table 16 JT5BD 048K 4 Ton Units 21 Table 17 JT5BD 060K 5 Ton Units 22 Electrical Information 23 Figure 12 JT5BD Wiring Diagram 23 Table 18 Electrical Specs amp Physical Data 24 USER INFORMATION IMPORTANT SAFETY INFORMATION 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 result in minor or moderate injury or property damage 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 Ifthe 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 on
29. oor Blower 1 Set the thermostat system mode on OFF and the fan mode to ON 2 Verify the blower runs continuously Check the air delivery at the supply 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 Coolin 1 Set 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 Set the thermostat s system mode to HEAT and the temperature mode above room temperature 2 Verify the optional heating equipment furnace or electric heat and indoor blower energize Feel the air being circulated by the indoor blower and veri
30. ove 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 Recommended T Stat Wire Unit to T Stat Length in FT 2 Wire Heating Thermostat Wire Gauge 5 Wire Heating Cooling Table 2 Thermostat Wire Gauge START UP amp ADJUSTMENTS Pre Start Check List X Verify the indoor unit is level and allows proper condensate drainage V 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 V Verify the thermostat is wired correctly 2 2 2 Start Up Procedures The thermostat s function mode should be set to OFF and the fan mode should be set to AUTO Close all electrical disconnects to energize the system Air Circulation Ind
31. previous operation or the interruption of the main electrical power Heating Operation 1 Set the thermostat s system mode to HEAT or AUTO and change the fan mode to AUTO See Figure 1 2 Setthe temperature 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 5 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 develop a coating of snow and ice on the heat transfer coil This is normal and the unit will defrost itself This unit monitors ambient and coil temperatures to regulate the defrost function accordingly
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33. temperatures are lower than design 4 In Heating Mode charge should be weighed in It is strongly recommended to verify charge in Cooling Mode at ambient above 70 F OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 163 165 167 164 179 163 171 167 183 166 195 164 186 169 210 165 Table 8 Charging Table for JT5BD 042K Series 3 5 Ton Units OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 149 152 154 152 170 150 158 155 172 155 188 154 176 158 Table 9 Charging Table for JT5BD 048K Series 4 Ton Units 17 REFRIGERANT CHARGING TABLES COOLING MODE ES Shaded boxes indicate flooded conditions L Rated design values The suction pressure will vary from design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 1 All pressures are listed in psig and all temperatures in F 2 Discharge temperatures greater than charted values indicate an undercharged system 3 In Cooling Mode suction pressure will be lower than design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 4 In Heat
34. w entering dry bulb or entering wet bulb temperatures are lower than design 4 In Heating Mode charge should be weighed in It is strongly recommended to verify charge in Cooling Mode at ambient above 70 F OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 152 155 165 154 177 152 168 157 180 156 192 154 183 159 Table 6 Charging Table for JT5BD 030KA Series 2 5 Ton Units OUTDOOR TEMPERATURE F Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press Temp Press 158 161 171 161 183 159 174 164 187 163 199 161 190 166 214 163 Table 7 Charging Table for JT5BD 036K Series 3 Ton Units 16 REFRIGERANT CHARGING TABLES COOLING MODE HSS Shaded boxes indicate flooded conditions L Rated design values The suction pressure will vary from design value if indoor air flow entering dry bulb or entering wet bulb temperatures are lower than design 1 All pressures are listed in psig and all temperatures in F 2 Discharge temperatures greater than charted values indicate an undercharged system 3 In Cooling Mode suction pressure will be lower than design value if indoor air flow entering dry bulb or entering wet bulb
35. ystem Heat Pumps leave the factory with a nitrogen holding charge Follow all charg ing instructions for maximum unit performance and efficiency Some local codes require licensed installation service personnelto servicethis type of equipment Refrigerant charging must be done by qualified personnel familiar with safe and en vironmentally responsible refrigerant handling procedures Under no circumstances should the owner attempt to install and or service this equipment Failure to comply with this warning could result in property damage personal injury or death CAUTION This unit uses refrigerant R 22 DO NOT use any other refrigerant in this unit Use of another refrigerant will damage the unit 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 wit
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