Nordyne R-410A User's Manual
Contents
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3. n Heat Pump OD Section Typical Heat Pump with Standard Air Handler A typical installation with a heat pump thermostat air handler and heat pump with an outdoor thermostat Thermostat G RW2C EO Y QUO Qu A 0 Green G il E N N TP Red h h VENN R White W aq i Wa Grey M Air Handler Heat Pump OD Section Typical Heat Pump with Outdoor Thermostat and Air Handler 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 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 Blower Time Delay Relay Select Models A time delay relay may be provided with the unitand must be installed in the indoor section The relay will keep the indoor blower running an additional 40 seconds for increased cooling efficiency after the outdoor unit shuts off The relay has four terminals and one mounting hole Connect terminal 1 to load side of blower relay Connect terminal 2 to terminal R of T stat Connect terminal 3 to common terminal at blower rel
4. install and or service this equipment Failure to comply with this warning could result in equipment damage personal injury or death NOTE The following Refrigerant Charging Charts are applicable to listed assemblies of equipment and at listed airflows for the indoor coil Assemblies of indoor coils and outdoor units not listed are not recommended 13 SEER SPLIT SYSTEM HEAT PUMP ORIFICE USAGE Model Restrictor Bore Size in System Charge Number Indoor Outdoor R 22 oz 1 1 2 Ton 2 Ton 2 1 2 Ton 3 Ton 3 1 2 Ton 4 Ton 5 Ton 14 EM i om pe ss s E _ e INE 28 mM 9 ae e aoe s Z eer dun1VtH3dIW31 HOOGLNO e sejeoripuri sen eA payeyo uey 1942916 sejnjejeduuo uBisep uey ging Jo p Buu lu Joopur uey eq uBis p py 1 ejeoipui sexoq 4 Bap ui e pue Bisd u pas seunsseud Iv lON NOILVH3dO dO S3GQOIN SNILV3H ONI10OOO 303 QN3931 SLYVHO ONISYVHO 83019 238 Buroo 5 1119 433S 2 101 seys
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6. 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 THERMOMETER FAN SWITCH 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 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 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 willbe used as asource of heat Sustained use of electric resistance he
7. cutout switch kit refrigerant compressor crankcase heater etc should be installed in strict accordance with the manufacturers installation instructions STARTUP AND CHECKOUT N WARNING Ensure electrical power to the unit 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 thermostatfunction 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 Il Green Red Brown For 2 Stage Heater Kits Air Handler Thermostat G RW2C E O Y O0 O O NOTE Jumper betweenW2 andE is required when no OD T Stat is used G R M 7 w NINE W2 Wz C OY N N IY
8. off Verify 24 VAC is present across Y and C when thermostat demand signal is present If not R and C are reverse wired TRIP LED and ALERT LED flashing together ALERT Flash Code 3 Compressor Short Cycling displayed incorrectly off ALERT Flash Code 5 6 or 7 Open Circuit Open Start Circuit or Open Run Circuit displayed incorrectly ALERT Flash Code 6 Open 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 Check that compressor run and start wires are through module s current sensing holes Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Check that compressor run and start wires are routed Start Circuit displayed for Code 7 through the correct module sensing holes Open Run Circuit or vice versa ALERT Flash Code 8 Welded Contactor displayed incorrectly Determine if module s Y terminal is connected Verify Y terminal is connected to 24VAC at contactor coil Verify 24VAC is present across Y and C when thermostat demand signal is present If not R and C are reverse wired V erify voltage at contactor coil falls below 0 5VAC when off Review Thermostat Demand Wiring page 4 for Y and C wiring Table 2 Module Wiring Troubleshooting for any unusual noises If present locate and determine the source of the noise a
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10. the module ALERT LED Yellow communicates an abnormal system condition through a unique flash code The ALERT LED will flash a number of times consecutively pause and then repeat the process The number of consecutive flashes defined as the Flash Code correlates to a particular abnormal condition Detailed descriptions of specific ALERT Flash Codes are shown in Table 1 of this manual TRIP LED indicates there is a demand signal from the thermostat but no current to the compressor is detected by the module The TRIP LED typically indicates the compressor protector is open or may indicate missing supply power to the compressor The scroll compressor s run R common and start S wires are routed through the holes in the Comfort Alert module marked and S 24 Power Wiring The Comfort Alert module requires a constant nominal 24 VAC power supply The wiring to the module s R and C terminals must be directly from the indoor unit or thermostat The Comfort Alert module requires a thermostat demand signal to operate properly NOTE After the thermostat demand signal is connected verify that 24 VAC across Y and C when demand is present TROUBLESHOOTING Interpreting The Diagnostic LEDs When an abnormal system condition occurs the Comfort Alert module displays the appropriate ALERT and or TRIP LED will flash a number of times consecutively pause and then r
11. Outdoor Heat Pump Users Information Installation Instructions 13 SEER R 410A High Etfficiency Split System These units have been designed and tested for capacity and efficiency in accordance with A R I Standards Split System Heat Pump units are designed for use with a wide variety of fossil fuel furnaces electric furnaces air handlers and evaporator coil combinations These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and or air conditioning appliances Some local codes require licensed instal lation service personnel for this type of equipment Read all instructions carefully before starting the installation USER S INFORMATION IMPORTANT Read this owner information to become familiar with the capabilities and use of your appliance Keep this with literature on other appliances 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 your problem call your servicing contractor Heat Pump Principle of Operation WINTER HEATING SUMMER COOLING 1 Outdoor air enters heat pump 1 Indoor air enters the air handler section Cold heat transfer section outdoor coil 2 Cold heat transfer section indoor coil extracts heat from outdoor air as refrigerant extracts heat from indoor air as refrigerant evaporates from a liquid to a gas ev
12. aporates from a liquid to a cold gas 3 Refrigerant compressed to a hot gas by 3 Refrigerant drawn to heat pump and heat pump carries the heatto the hot heat compressed to a hot gas by heat pump transfer section indoor coil carries the heat outdoors 4 Hot heat transfer section indoor coil 4 Hot heat transfer section outdoor coil releases the heatto indoor air as refrigerant releasesthe heatas refrigerant condenses condenses from a gas to a liquid from a gas to a liquid 5 Airhandler circulates the heat throughout 5 Heat pump outdoor fan discharges the the home heat to outside air 6 Refrigerant returns to outdoor coil and 6 Refrigerant returns to indoor coil and evaporates once again to absorb more evaporates once again to absorb more heat heat OPERATING INSTRUCTIONS TO OPERATE YOUR HEAT PUMP FOR COOLING i Set the thermostat system switch to COOL andthe thermostat fan switch to AUTO See Figure 1 Set the thermostat temperature to the desired temperature level using the tem perature selector Please refer to the sepa rate 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 cool ing level NOTE If the thermostat temperature level is re adjusted or the thermostat system switch is repositioned the outdoor unit may not start immediately
13. at in place of the heat pump will result in an increase in electric utility costs Defrost During cold weather heating operation the outdoor unit will develop a coating TEMPERATURE LU PR SYSTEM SWITCH Figure 1 Typical Thermostat of snow and ice on the heat transfer coil This is normal and the unit will periodically defrost itself During the defrost cycle the outdoor fan will stop and the compressor will continueto run and heatthe 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 Setthe thermostat system switch to AUTO andthe 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 ofthe 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 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
14. ay or transformer Connect terminal 4 to terminal G on T stat Low Pressure Switch Select Models A low pressure switch is factory installed in select models only If provided this switch is located in the suction line internal to the outdoor 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 inputs to the unit Thus when the switch opens and then closes there will be a 5 minute short cycling delay before the outdoor unit will energize High Pressure Switch A high pressure switch is factory installed and located in the compressor discharge line internal to the outdoor unit The switch is designed to de energize the system when very high pressures occur during abnormal conditions Under normal conditions the switch is closed If the discharge pressure 10 rises above 575 psig then the switch will open and de energize the outdoor unit The switch will close again once the discharge pressure decreases to 460 psig Please note thatthe switch interrupts the thermostat inputs to the unit Thus when the switch opens and then closes there will be a 5 minute short cycling delay before the outdoor unit will ener
15. efrost T stat closes at 32 opens at 68 3 Next jump the Test pin to on terminal strip This will initiate defrost test in 5 10 or 15 seconds This is determined by 30 60 or 90 minutes defrost pin settings Factory setting will be 30 minutes 4 When the reversing valve shifts to the defrost mode quickly remove jumper from If the jumper is not removed within a 5 second period the defrost test will terminate Unit will continue to stay in defrost mode Until A Board recognizes that defrost sensor has reached 68 and opened or B T2 DFT jumper is removed or C 10 minutes have elapsed board override Ifthe above steps will notinitiate a defrost replace the defrost board Anti Short Cycle Timer Test The5 minute time delay feature can be bypassed or shortened to 1 second by jumping the Test to C terminal Note If jumper is left on the Test to common pins permanently the defrost cycle will become inoperable Optional Equipment A functional checkout should be performed in accordance with the checkout procedures supplied with the equipment Adjustment of Refrigerant Charge N CAUTION Split system heat pump equipment contains liquid and gaseousrefrigerant 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 attempt to
16. epeat the process To identify a Flash Code number count the number of consecutive flashes Every 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 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 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 five minutes increase the setpoint temperature of the thermostat to the maximum setting Verify that the 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 Figure 2 Comfort Alert Diagnostics Module 11 Status LED Status LED Description Status LED Troubleshooting Information Green POWER Module has power Red TRIP Yellow ALERT Fla
17. ess Press Temp Liquid Disch Suc Press Press Temp Liquid Disch Suc Press OUTDOOR TEMPERATURE DEG F Press Temp Liquid Disch Suc Press Refrigerant Charging Charts for Heating Mode of Operation 13 SEER Split System Heating Charts Press Temp Liquid Disch Suc Press Liquid Disch Temp Press Press e LO gt 2 ac oO 5 5a S eo N 2 22 23 INSTALLER PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER 7084100 7084100 Specifications and illustrations subject to change without notice and without incurring obligations Printed in U S A 08 05
18. f 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 NOTICE Certain models have external panels fabricated from apremium grade of stainless steel designed to inhibit corrosion For such units if the unit is located in acoastal region or other area subjected to high concentrations of salt then the unit should be hosed off after stroms and monthly otherwise to maintain its new appearance 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 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 glove
19. gize 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 blower 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 Comfort Alert Diagnostics Select Models The Comfort Alert diagnostics module facilitates troubleshooting heat pump and air conditioning system failures This Comfort Alert module is designed only for single phase systems with scroll compressors that have internal overload protection By monitoring and analyzing data from the compressor and the thermostat demand the module can detect the cause of electrical and system related failures without any sensors A flashing LED indicator communicates the ALERT code and guides the service technician more quickly and accurately to the root cause of a problem NOTE This module does not provide safety protection The Comfort Alert module is a monitoring device and cannot control or shut down other devices LED Description See Figure 2 POWERLED Green indicates voltage is present at the power connection of
20. iction 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 electrical 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 COPPER WIRE SIZE AWG 1 Voltage Drop Wire Size based on N E C for 60 type copper con ductors Maximum Fuse Circuit Breaker Size Circuit protection for the outdoor unit mustbe 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 Optional Equipment e g liquid line solenoid valves hard start kits low suction pressure cutout switch kit high pressure
21. ing 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 e 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 LEDs flashing at same time means control circuit voltage is too low for operation 12 Table 1 Interpreting the Diagnostic LEDS Miswired Module Indication Recommended Troubleshooting Action Green LED is not on module does not power up Determine if both R and C module terminals are connected Verify voltage is present at module s R and C terminals Review 24VAC Power W iring page 4 for R and C wiring Green LED intermittent module powers up only when compressor runs TRIP LED is on but system and compressor check OK Determine if R and Y terminals are wired in reverse Verify module s R and C terminals have a constant source Review 24VAC Power Wiring page 4 for R and C wiring Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when
22. installation instructions ELECTRICAL CONNECTIONS N WARNING Turn off all electrical power at the main circuit box before wiring electrical power to the outdoor unit Failure to comply may cause severe personnel injury or death Wiring Diagram Schematic wiring diagram schematic is 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 schematic for identification and location of outdoor unit field wiring interfaces Control Circuit Wiring The outdoor unit is designedto operate from a 24 VAC Class 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 withthe instructions supplied with the indoor equipment A typical residential installation with a heat pump thermostat and air handler are shown below 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 jurisd
23. lation dirty blocked damaged Condenser fan is not running Return air duct has substantial leakage If low pressure switch present in system check Flash Code 1 information 1 Thermostat demand signal is intermittent 2 Time delay relay or control board defective 3 If high pressure switch present go to Flash Code 2 information 4 If low pressure switch present go to Flash Code 1 information Run capacitor has failed Lowline voltage contact utility 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 3 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 damaged e 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 wind
24. nd correct as necessary OUTDOOR THERMOSTAT if supplied The outdoor thermostat prevents the electrical auxiliary heat if used from operating above a desired set point Selection of the set point is determined from the building design heat load The thermostat is adjustable from 45 F to O F The factory temperature setting is at 40 F Defrost Cycle Timer The defrost cycle timer controls the time interval of the hot gas defrost after the defrost sensor closes It is located in the lower left 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 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 To set the cycle timer place the timing pin on the defrost control board to the desired time interval post Note All units are shipped from the factory with the default time setting of 30 minutes Maximum heating performance can be achieved by setting the time to 90 minutes Defrost Test Procedure 1 Terminals R C must have 18 30v present between them in order for time delay and defrost sequences to be initiated 13 2 With compressor running in heat mode first jump the T2 DFT test pins This will indicate to board that defrost T stat is closed D
25. o 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 Read the following instructions completely before performing the installation N CAUTION This unit uses refrigerant R 410A DO NOT under any circumstances use any other refrigerant besides R 410A in this unit Use of another refrigerant will damage this unit Outdoor Unit Section Each outdoor unit is shipped with a refrigerant charge adequate to operate the outdoor section with an indoor matching coil or air handler Units with braze connections include the proper amount of refrigerant for an additional 15 ft of refrigerant lines the same size as the valve fittings NOTE DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING Matching 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 o
26. s fire extinguisher etc must be used when performing brazing operations N WARNING Ensure all electrical power to the unit is off prior to 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 Unit at 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 5 outdoor unit must be installed in such a manner that airflow through the coil is not obstructed and that the unit can be serviced Facility Prerequisites Electrical power supplied must be adequate for proper operation 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 for a slab mount installation requires a stable foundation and one not subject to erosion The slab
27. sh Code 1 Yellow ALERT Flash Code 2 Yellow ALERT Flash Code 3 Yellow ALERT Flash Code 4 Yellow ALERT Flash Code 5 Yellow ALERT Flash Code 6 Yellow ALERT Flash Code 7 Yellow ALERT Flash Code 8 Yellow ALERT Flash Code 9 Thermostat demand signal Y is present but the compressor is not running Long Run Time Compressor is running extremely long run cycles System Pressure Trip Discharge or suction pressure out of limits or compressor overloaded Short Cycling Compressor is running only briefly Locked Rotor Open Circuit Open Start Circuit Current only in run circuit Open Run Circuit Current only in start circuit Welded Contactor Compressor always runs Low Voltage Control circuit lt 17VAC gt CO Oo NDN gt CO CO FO Supply voltage is present at module terminals Compressor protector is open 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 Lowrefrigerant charge Evaporator blower is not running Evaporator coil is frozen Faulty metering device Condenser coil is dirty Liquid line restriction filter drier blocked if present in system Thermostat is malfunctioning Comfort Alert Failure High head pressure Condenser coil poor air circu
28. 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 so as notto overload roof structures nor transmit 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 N CAUTION This systemutilizes 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 General Once outdoor and indoor unit placementhas been determined route refrigerant tubing between the equipment in accordance with sound installation practices Refrigerant tubing should be routed in a manner that minimizes
29. 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 Regularly a 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 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 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 Theunitthermostatis properly set see To Operate Your Heat Pump for Cooling and T
30. 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 kept clean 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 of the 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 A filter dryer is provided with the unitand mustbe installed in the liquidline ofthe system Ifthe installation replaces a system with a filter dryer already present in the liquid line the filter dryer must be replaced with the one supplied with the unit The filter dryer must be installed in strict accordance with the manufacturers installation instructions Optional Equipment Optional equipment e g liquid line solenoid valves etc should be installed in strict accordance with the manufacturers
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