Nordyne T3BN User's Manual
Contents
1. M M BA M LU TR TTT ANA A AMAN ml lt gt lt gt gt DURUM QUAM QUAM QU RAT RUM NINH W M MM BIN BA lt gt lt gt M i 1 N lt gt gt lt gt lt gt gt lt gt 11 M YN 41 4 1 I DR NRE JN lt gt lt gt p lt gt M M UA DN M 11 11100 NU M These instructi ions primarily i rienced in the proper i rily intended to assist qualified indivi Some local 2 of heating and or e ha naWwiduals expe equipment Read all 2 installation service Seon ee s carefully before start2. 5 6 1185 3 1 PHYSICAL AND ELECTRICAL SPECIFICATIONS OUTDOOR UNITS 10 1 EER High Efficiency Three Phase Model No T3BN Volts Phase Hz Voltage Range Min Max otal Amps Min Circuit Ampacity Delay Fuse Max 1 090C 280 230 3 60 187 253 32 1 41 4 090W 120C 120W 380 420 3 50 380 420 3 50 414 506 70 35 16 4 21 7 Wire Length AWG 60 C Wire Size Max Length AWG 75 Refrigerant Suction Line Length O D Liq Line All Lengths 5 8 O D Circuits Qty 1 Area ft 2 Rows FPI Tube Dia Volts Phase Hz Qty 2 16 3 8 OD 280 230 3 60 1 3 8 OD 3 8 OD 3 8 OD 460 3 60 280 230 3 60 460 3 60 380 420 3 50 380 420 3 50 1 1 1 3 4 3 4 3 4 3 4 1 7 3 3 1 7 Dia Pitch Blades RPM CFM Max Total 30 19 3 825 7500 30 19 3 30 26 3 30 26 3 825 7500 825 8500 825 8500 Volts Phase Hz 280 230 3 60 460 3 60 280 230 3 60 460 3 60 Qty Type 1 Scroll 1 Scroll 1 Scroll 1 Scroll RLA 28 8 14 7 30 1 15 5 LRA 195 95 225 114 Stages Percent 1 100 1 100 1 100 1 100 Crankcase Heater Qty Type 0 15 ft 26 75 ft 1 Band 11 8 1 3 8 3 1 Band 1 Band 1 Band Us 16 25 ft 1 3 8 3 1 3 8 3 1 3 8 3 1 3 8 3 13 8 3 13 8 3 13 8 3 Refrigerant Charge
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4. 56 56 90 90 Charge otal System with 15 Line Set 2 374 374 486 486 413 413 423 423 Approximate Ibs 1 HACR Type Circuit Breakers may be used 2 Add 9 0 oz of refrigerant per 5 feet of additional line set 3 Requires a 1 3 8 1 1 8 reducer line to unit ACCESSORIES Condensing Unit Low Ambient Kit 913549A Maintains system pressures during low ambient conditions 14 425 425 435 435 COPPER WIRE SIZE AWG Supply Wire Length Feet 1 Voltage Drop Supply Circuit Ampacity 15 CERTIFIED w INSTALLER PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER 708538A replaces 7085380 Specifications and illustrations subject to change without notice and without incurring obligations 708538A Printed in U S A 08 08
5. a Cleanorreplace 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 Inspect the filter monthly b Remove any leaves and grass clippings from the coil in the outdoor unit being careful not to damage the aluminum fins c Check for any obstruction such as twigs Sticks etc d Certain models have external panels fabricated from a premium grade of steel designed to inhibit cor rosion For such units if the unit is located in a coastal region or other area subjected to high concentrations of salt then the unit should be hosed off after storms and monthly otherwise to maintain its new appearance N CAUTION Do not over oil or oil motors not factory equipped with oil tubes The compressor is hermetically sealed and does not require lubrication 2 Before Calling a Service Technician Be Certain a Theunit thermostat is properly set see To Operate Your Heat Pump for Cooling and To Operate Your Heat Pump for Heating b The unit disconnect fuses are in good condition and the electrical power to the unit is turned on Read Your Warranty Please read the separate warranty document completely It contains valuable information about your system GENERAL INFORMATION Readthe following instructions completely before performing the installation Outdoor Unit Section Each outdoor unit is shipped w
6. compressor is running Defrost T stat is closed at 32 or below and is open at 68 or above But it s state is unknown if the temperature is between 32 F and 68 F The defrost thermostat tells the board whether a defrost cycle needs to be started or terminated With the DFT closed the unit will run for 30 60 90 minutes in heat mode and then defrost the outdoor coil The defrost will turn off the outdoor fan turn onthe compressor and raise the coil temperature to 68 F This will open the DFT and terminate the defrost If the DFT does not open the defrost will end after 10 minutes 3 Defrost board speed up With compressor running in heat mode next jump the Test pin to C on terminal strip This will initiate a defrost test in 5 10 or 15 seconds This is determined by the 30 60 or 90 minute defrost pin settings The factory setting will be 30 minutes Note that this will bypass the compressor off delay when the unit goes into defrost test and if left in defrosttest the delay will be bypassed when the test is terminated by the processor If the jumper is removed before the test is over the processor will perform the remainder of a normal defrost See step 2 above 4 Remove the jumpers Note The delay no delay pin concerns compressor operation during defrosts The default setting is delay Reciprocating compressors should only use this setting in conjunction with an approved hard start kit Scroll compressors that h
7. Outdoor Heat Pump i i ici Series High Efficiency Commercial Split System These units have b dance designed and tested for capaci I Sup DES 4 12 uality matched heating anc g and cooling system 2 M m TUYO JUIN AD tU 2 7 TS 111 M TIN z TY 11 11 11 IM M TM VM VM UN AM RM RM TATA a a Ni uM M NN i i I MN MA i NA M M W W M M MUN M 60 M M M B I M M M M
8. ave noise issues while going into or coming out of defrost should use this 30 second delay to reduce the defrost noise To switch from no delay to delay remove the pin from the no delay pin location and shift it to the delay pin location Speed up changes Manually initiating a defrost will cause the compressorto run continually when entering defrost Normal defrost operation To test normal defrost operation when the temperature is above 35 F jumper R to DFT on the 624656 board and allow the unit to run for 30 minutes Defrost will continue until the R to DFT jumper is removed or for 10 minutes Remove the jumper The 5 minute time delay feature can be shortened 1 time to 1 second by jumping the Test to terminal Remove the jumper and repeat as desired Note If jumper is left on the Test to common pins permanently the defrost cycle will become inoperable Defrost Test Procedure for 624656 1 Jumper T2 to DFT at the test terminals 2 With unit running in heat mode short the TEST terminaltothe commonterminal near it This will speed up the board and cause it to enter defrost mode in 5 10 15 seconds depending on the defrost time selection Compressor delay will not function during speed up 3 This test will end in 5 seconds if the TEST common short is not removed 4 Remove both the short and the T2 to DFT jumper to terminate the defrost cycle The 30 second com
9. cause severe personnel injury or death Wiring Diagram Schematic wiring diagram schematicis located on the inside cover of the electrical box of the outdoor unit The installer should become familiar with the wiring diagram schematic before making any electrical connections to the outdoor unit Outdoor Unit Connections The outdoor unit requires both power and control circuit electrical connections Refer to the unit wiring diagram schematicfor identification and location of outdoor unit field wiring interfaces Control Circuit Wiring The outdoor unit is designed to operate from a 24 Class II control circuit Control circuit wiring must comply with the current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction Thermostat connections should be made in accordance with the instructions supplied with thethermostat and with the instructions supplied with the indoor equipment A typical commercial installation with a heat pump thermostat and air handler are shown on the next page Electrical Power Wiring Electrical power wiring must comply with the current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction Use of rain tight conduit is recommended Electrical conductors shall have minimum circuit ampacity in compliance with the outdoor unit rating label The facility shall employ electr
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11. i rthis type of arting the installati ion OPERATING INSTRUCTIONS TO OPERATE YOUR HEAT PUMP FOR COOLING 1 Set the thermostat system switch to COOL and the thermostat fan switch to AUTO See Figure 1 Setthethermostattemperature to the desired temperature level using the temperature selector Please refer to the separate detailed thermostat user s manual for complete instructions regarding thermostat programming The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature the desired cooling level NOTE If the thermostat temperature level is re adjusted or the thermostat system switch is repositioned the outdoor unit may not start immediately The outdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation or the interruption of the main electrical power TO OPERATE YOUR HEAT PUMP FOR HEATING 1 Set the thermostat system switch to HEAT and the thermostat fan switch to AUTO See Figure 1 2 Set the thermostat temperature to the desired temperature level using the temperature selector Please refer to the separate detailed thermostat user s manual for complete instructions regarding thermostat programming The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired heating level NOTE If the thermostat temperature level is re ad
12. ical circuit protection at a current rating no greater than that indicated on the outdoor unit rating label Refer to the unit wiring diagram for connection details Minimum Circuit Ampacity Electrical wiring to the equipment must be compatible and in compliance with the minimum circuit ampacity listed on the outdoor unit data label Maximum Fuse Circuit Breaker Size Circuit protection forthe outdoor unit must be compatible with the maximum fuse circuit breaker size listed on the outdoor unit data label Disconnect Switch An electrically compatible disconnect switch must be within line of sight of the outdoor unit This switch shall be capable of electrically de energizing the outdoor unit Optional Equipment Optional equipment requiring connection to the power or control circuits must be wired in strict accordance with current provisions of the National Electrical Code ANSI NFPA 70 with applicable local codes having jurisdiction and the installation instructions provided with the equipment COPPER WIRE SIZE AWG 1 Voltage Drop upply Wire Length Feet Supply Circuit Ampacity Wire Size based on N E C for 60 type copper conductors Optional Equipment e g liquid line solenoid valves refrigerant compressor crankcase heater etc should be installed in strictaccordance with the manufacturer s installation instructions STARTUP AND CHECKOUT N WARNING Ensure electrical power to the u
13. ith a refrigerant holding charge NOTE DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING Matching indoor coils and air handlers may be shipped with a small holding charge to pressurize them to keep out contaminants To release the pressure read the indoor section installation instructions carefully Liquid and Suction Lines Fully annealed refrigerant grade copper tubing should be used when installing the system Refrigerant suction line tubing should be fully insulated Field Connections for Electrical Power Supply All wiring must comply with current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction The minimum size of electrical conductors and circuit protection must be in compliance with information listed on the outdoor unit data label SAFETY CONSIDERATIONS Pressures within the System Split system heat pump equipment contains liquid and gaseous refrigerant under pressure Installation and servicing of this equipment should be accomplished by qualified trained personnel thoroughly familiar with this type of equipment Under no circumstances should the Homeowner attempt to install and or service the equipment Labels Tags Precautions When working with this equipment follow all precautions in the literature on tags and on labels provided with the equipment Read and thoroughly understand the instructions provided with
14. justed orthe thermostat system switch is repositioned the outdoor unit may not start immediately The outdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation or the interruption of the main electrical power Emergency Heat The thermostat includes a system switch position termed EM HT This is a back up heating mode to be used only if there is a suspected problem with the outdoor unit With the system switch set to EM HT the outdoor unit will be locked off and supplemental heat typically 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 During cold weather heating operation the outdoor unit may develop a coating of snow and ice on the heat transfer coil This is SYSTEM MODE SWITCH TEMPERATURE SENSOR Figure 1 Typical Thermostat normal and the unit will periodically defrost itself During the defrost cycle the outdoor fan will stop and the compressor will continue to run and heat the outdoor coil causing the snow and ice to melt After the snow and ice have melted some steam may rise from the outdoor unit as the warm coil causes some melted frost to evaporate TO OPERATE YOUR HEAT PUMP FOR AUTOMATIC COOLING AND HEATING 1 Set thermostat system switch to AUTO andthe
15. nit is off prior to performing the following steps Failure to do so may cause personal injury or death Air Filters Ensure air filters are clean and in place prior to operating the equipment Thermostat Setthe room thermostat function switch to OFF fan switch to AUTO and adjust the temperature setpoint to its highest setting Prior to applying electrical power to the outdoor unit ensure that the unit has been properly and securely grounded and that power supply connections have been made at both the facility power interface and outdoor unit Outdoor Unit Ensure the outdoor coil and top of the unit are free from obstructions and debris and all equipment access control panels are in place Using extreme caution apply power to the unit and inspect the wiring for evidence of open shorted and or improperly wired circuits Functional Checkout N CAUTION If equipped with a compressor crankcase heater wait 24 hours prior to performing a function checkout to allow for heating of the compressor crankcase Failure to comply may result in damage and could cause premature failure of the system Thermostat RWo2C EO Y betweenW2 and E is required when no OD T Stat is used amp W2 to be connected to Electric Heat Air Handler Heat Pump OD Section Typical Heat Pump with Standard Air Handle
16. on ofthe equipment The system must be wired and provided with circuit protection in accordance with local building codes and the National Electrical Code INSTALLING THE OUTDOOR UNIT Slab Mount The site selected fora slab mount installation requires a stable foundation and one not subject to erosion The slab should be level and anchored if necessary prior to placing the equipment on the slab Cantilever Mount The cantilever mount should be designed with adequate safety factor to support the weight of the equipment and for loads subjected to the mount during operation Installed equipment should be adequately secured to the cantilever mount and levelled prior to operation of the equipment Roof Mount The method of mounting should be designed soas notto overload roof structures nortransmit noise to the interior of the structure Refrigerant and electrical line should be routed through suitably waterproofed openings to prevent water leaking into the structure INSTALLING THE INDOOR UNIT The indoor section should be installed before proceeding with routing of refrigerant piping Consultthe Installation Instructions ofthe indoor unit i e air handler furnace etc for details regarding installation CONNECTING REFRIGERANT TUBING BETWEEN THE INDOOR AND OUTDOOR UNIT General Once outdoor and indoor unit placement has been determined route refrigerant tubing between the equipment in accordance with sound ins
17. or closes It is located in the upper right corner of the defrost control board Three interval settings are available 30 minutes 60 minutes and 90 minutes Time setting selection is dependent on the climate where the unit is being installed The default defrost cycle timer is setto 30 minutes To adjust the cycle time move the jumper to cover the two pins directly adjacent to the desired cycle time Example 1 Dry climate of Southern Arizona A 90 minute setting is recommended Example 2 Moist climate of Seattle Washington A 30 minute setting is recommended High Pressure Switch high pressure switchis factory installed and located in the liquid line internal to the outdoor unit The switch is designed to protect the system when very high pressures occur during abnormal conditions Under normal conditions the switch is closed If the liquid pressure rises above 425 psig then the switch will open and de energize the outdoor unit The switch will close again once the liquid pressure decreases to 350 psig Thus when the switch opens and then closes there will be a 5 minute short cycling delay before the outdoor unit will energize DEFROST CONTROL BOARD OPERATION AND TESTING 1 Terminals must have 24 V present between them in order for the time delay and defrost sequences to be operational 2 Jumper the T2 DFT test pins This will indicate to the board that the defrost T stat is closed if the
18. pressor delay should operate normally 5 Test is complete reset thermostat to home owner preference 4 pinbr3 061 Scl 0 1 OLL 901 001 96 06 98 08 GZ _ _ _ H _ _ _ _ _ _ T 091 ueuM 92 T 002 gt 092 9 0 006 2 5 406 O 046 5 T 922 T aL o 007 o a AXL dH 9 2 Bisd pinbiq 10 4 pinbiq 901 001 1 5 9AOQ Refrigerant Charging Charts eyg AXL UOL OL 051 92 00 osz 006 056 915 007 Bisd pinbiq 11 REFRIGERANT CHARGING CHART Heating Mode of Operation uome eisu 1noxoeuo eui Jed si yun y ey pinbi JO 91 UCU SS9 128 Jed ZO 0 6 e ouJeJ pue 128 G pinbi YOU 8 6 10 199J jeuonippe Jed zz H 20 06 ppe 129 G UY
19. r Indoor Blower Set the thermostat function switch to COOLING and the fan switch to ON Verify that the indoor blower is operating and that airflow is not restricted Set the fan switch back to AUTO Low Pressure Switch A low pressure switch is factory installed see attached This switch is located in the suction line internal to the out door unit The switch is designed to protect the compressor from a loss of charge Under normal conditions the switch is closed If the suction pressure falls below 5 psig then the switch will open and de energize the outdoor unit The Switch will close again once the suction pressure increases above 20 psig Please note that the switch interrupts the thermostat to the unit Thus when the switch opens and then closes there willbe 5 minute short cycling delay before the outdoor unit will energize Cooling Gradually lower the thermostat temperature setpoint below the actual room temperature and observe that the outdoor unit and indoor blower energize Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature Listen for any unusual noises If present locate and determine the source of the noise and correct as necessary Short Cycle Protection With the system operating in COOLING mode note the setpoint temperature setting of the thermostat and gradually raise the setpoint temperature until the outdoor unit and indoor blo
20. tallation practices Refrigerant tubing should be routed in a manner that minimizes the length of tubing and the number of bends in the tubing Refrigerant tubing should be supported in a manner that the tubing will not vibrate or abrade during system operation Tubing should be keptclean of foreign debris during installation and installation of a liquid line filter drier is recommended if cleanliness or adequacy of system evacuation is unknown or compromised Every effort should be made by the installer to ensure that the field installed refrigerant containing components ofthe system have been installed in accordance with these instructions and sound installation practices so as to insure reliable system operation and longevity The maximum recommended interconnecting refrigerant line length is 75 feet and the vertical elevation difference between the indoor and outdoor sections should not exceed 20 feet Consult long line application guide for installations in excess of these limits Filter Dryer Installation filter dryer is provided with the unit and installed inside the outdoor unit Optional Equipment Optional equipment 0 liquid line solenoid valves etc should be installed in strict accordance with the manufacturer s installation instructions ELECTRICAL CONNECTIONS N WARNING Turn offallelectrical power atthe main circuit box before wiring electrical power to the outdoor unit Failure to comply may
21. the equipment prior to performing the installation and operational checkout of the equipment Brazing Operations Installation of equipment may require brazing operations Safety codes must be complied with Safety equipment e g safety glasses work gloves fire extinguisher etc must be used when performing brazing operations N WARNING Ensure all electrical power to the unit is off priorto installing or servicing the equipment Failure to do so may cause personal injury or death SITE PREPARATION Unpacking Equipment Remove the cardboard carton and User s Manual from the equipment Take care to not damage tubing connections when removing from the carton Inspect for Damage Inspect the equipment for damage prior to installing the equipment at the job site Ensure coil fins are straight and if necessary comb fins to remove flattened and bent fins Preferred Location of the Outdoor Unitat the Job Site Conduct a survey of the job site to determine the optimum location for mounting the outdoor unit Overhead obstructions poorly ventilated areas and areas subject to accumulation of debris should be avoided The outdoor unit should be installed no closer than 18 inches from the outside walls of the facility and in an area free from overhead obstructions to ensure unrestricted airflow through the outdoor unit Facility Prerequisites Electrical power supplied must be adequate for proper operati
22. 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 requiredto automatically maintain the indoor temperature within the desired limits TO SHUT OFF YOUR HEAT PUMP Set the thermostat system switch to OFF and the thermostat fan switch to AUTO See Figure 1 The system will not operate regardless of the thermostat temperature selector s setting TO OPERATE THE INDOOR BLOWER CONTINUOUSLY Setthe thermostat fan switch to ON See Figure 1 The indoor blower will start immediately and will run continually until the fan switch is reset to AUTO The continuous indoor blower operation can be obtained with the thermostat system switch set in any position including OFF 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 fireplace operation TO MAINTAIN YOUR HEAT PUMP N CAUTION Be certain the electrical power to the outdoor unit and the furnace air handler is disconnected before doing the following recommended maintenance 1 Regularly
23. wer de energize Immediately lower the setpoint temperature of the thermostat to its original setting and verify that the indoor blower is energized and that the outdoor unit remains de energized Verify that after approximately 5 minutes the outdoor unit energizes and that the temperature of the air supplied to the facility is cooler than ambient temperature Heating Lower the thermostat setpoint temperature to the lowest obtainable setting and set the thermostat function switch to HEATING The indoor blower and outdoor unit should stop running After a minimum of five minutes increase the setpoint temperature of the thermostat to the maximum setting Verify thatthe outdoor unit and indoor blower have energized Feel the air being circulated by the indoor blower and verify that it is warmer than ambient temperature Listen for any unusual noises If present locate and determine the source of the noise and correct as necessary NOTE Other sources for heating i e electric furnace fossil fuel furnace air handler with electric heat options etc that interface with the unit should be functionally checked to verify system operation and compatibility Refer to the installation instructions for this equipment and perform a functional checkout in accordance with the manufacturer s instructions Defrost Cycle Timer The defrost cycle timer controls the accumulated run time interval of the hot gas defrost after the defrost sens
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