Heat Pump - Model 25VNA - Installation Instructions - A
Contents
1. YaLWaANl STATUS LED HK38EA014 A11139 Fig 11 Variable Speed Control Board e Fan is ON when outdoor coil temperature is too high 80 F 26 7 C the high side pressure is too high or if outdoor fan has been OFF for 30 minutes Fan is turned on to allow refrigerant system to stabilize e Low pressure indication by the suction pressure transducer is ignored for first 3 minutes during low ambient start up After 3 minutes if low pressure trip occurs then outdoor fan motor is turned off for 10 minutes with the compressor running If pressure condition is satisfied within 10 minutes then cooling continues with the outdoor fan cycling per the coil temperature routine listed above for the remainder of the cooling cycle If the suction pressure condition is not satisfied within 10 minutes then the normal trip response shut down cooling operation and generate LP trip error will occur Defrost This user interface UI offers 5 possible defrost interval times 30 60 90 120 minutes or AUTO The default is AUTO Defrost interval times 30 60 90 and 120 minutes or AUTO are selected by the Infinity Control User Interface dip switches are not used AUTO defrost adjusts the defrost interval time based on the last defrost time as follows e When defrost time lt 3 minute2. IMPORTANT This system requires the power supply to the outdoor unit and the indoor unit for the UI to communicate with the outdoor unit General Information Use No 18 AWG or larger color coded insulated 35 C minimum wire for low voltage control wires All wiring must be NEC Class 1 and must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory transformer for control power requirement of system accessories external to the OD unit The outdoor unit has its own transformer power Final Wiring Check IMPORTANT Check factory wiring and field wire connections to ensure terminations are secured properly Check wire routing to ensure wires are not in contact with tubing sheet metal etc Step 9 Compressor Crankcase Heater This compressor has an internal crankcase heater Furnish power to the unit a minimum of 24 hr before starting the unit for the first time To furnish power to heater only set thermostat to OFF and close electrical disconnect to outdoor unit Power is not required to the indoor unit or User Interface for proper operation of heater Crankcase heater will however be intelligently energized as needed between operations and otherwise even when the UI and indoor unit is not installed as long as there is power to the outdoor unit even if the indoor unit and UI are not yet installed Airflow Setup for Infinity Control Furnace or FE Fan Coil communicating
3. 9 53 mm Dia Tiedown Knockouts in Basepan 2 Places View From Top A05177 UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONS in mm Dimension in mm A B Cc 35 X 35 889 X 889 9 1 8 231 8 6 9 16 166 7 28 7 16 722 3 Fig 3 Tiedown Knockout Locations Step 4 Operating Ambient The minimum outdoor operating ambient in cooling mode is 55 F 12 78 C without low ambient cooling enabled and the maximum outdoor operating ambient in cooling mode is 125 F 51 67 C The maximum heating operation ambient is 66 F 18 9 C Compressor protections prevent operation below 10 to 20 F Step 5 Elevate Unit Elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit A CAUTION UNIT OPERATION HAZARD Failure to follow this caution may result in equipment damage or improper operation Do not allow water and or ice to build up in base pan A CAUTION UNIT OPERATION HAZARD Failure to follow this caution may result in equipment damage or improper operation Locate the unit in such a way that it is stable in all circumstances including adverse weather conditions Step 6 In Long Line Applications Install Liquid Line Solenoid Valve LSV For refrigerant piping arrangements with equivalent lengths of greater than 80 ft 24 38 m and or when elevation difference be
4. Systems Communication Failure If communication with the Infinity control is lost with the User Interface UD the control will flash the appropriate fault code see Table 7 Check the wiring to the User Interface and the indoor and outdoor units and power Model Plug Each control board contains a model plug The correct model plug must be installed for the system to operate properly see Table 3 Table 3 Model Plug Information PIN RESISTANCE MODEL MODEL PLUG K ohms NUMBER NUMBER Pins 1 4 Pins 2 3 25VNA024 HK70EZ001 5 1K 11K 25VNA036 HK70EZ002 5 1K 18K 25VNA048 HK70EZ003 5 1K 24K 25VNA060 HK70EZ004 5 1K 33K The model plug is used to identify the type and size of unit to the control On new units the model and serial numbers are input into the board s memory at the factory If a model plug is lost or missing at initial installation the unit will operate according to the information input at the factory and the appropriate error code will flash temporarily An RCD replacement board contains no model and serial information If the factory control board fails the model plug must be transferred from the original board to the replacement board for the unit to operate NOTE The model plug takes priority over factory model information input at the factory If the model plug is removed after initial power up the unit will operate according to the last valid model plug installed and flash
5. 4 HOURS Inverter VDC Out Over Voltage 91 15 Inverter VDC Out Under Voltage 92 15 230VAC Under Voltage 93 15 230VAC Over Voltage 94 15 High Current Lockout 95 2 HOURS VDC Under Voltage Lockout 96 2 HOURS VDC Over Voltage Lockout 97 2 HOURS High Torque Event 98 10 High Torque Lockout 99 2 HOURS OFF NA 17 FINAL CHECKS CARE AND MAINTENANCE IMPORTANT IMPORTANT Before leaving job be For continuing high performance and to minimize sure to do the following possible equipment failure periodic maintenance must be 1 Ensure that all wiring is routed away from tubing performed on this equipment and sheet metal edges to prevent rub through or Frequency of maintenance may vary depending upon wire pinching geographic areas such as coastal applications See 2 Ensure that all wiring and tubing is secure in unit Owner s Manual for information before adding panels and covers Securely fasten all panels and covers 3 Tighten service valve stem caps to 1 12 turn past finger tight 4 Leave Users Manual with owner Explain system operation and periodic maintenance requirements outlined in manual 5 Fill out Dealer Installation Checklist and place in customer file PURON R 410A REFRIGERANT QUICK REFERENCE GUIDE Puron refrigerant operates at 50 70 percent higher pressures than R 22 Be sure that servicing equipment and replacement components are designed to operate with Puron refrigerant Puron refrigerant cyli
6. 8 7 8 7 8 5 8 25VNA036 3 8 3 8 7 8 7 8 5 8 25VNA048 3 8 3 8 7 8 1 1 8 3 4 25VNA060 3 8 3 8 7 8 1 1 8 3 4 Units are rated with 25 ft 7 6 m of lineset See Product Data sheet for performance data when using different size and length line sets Notes 1 Do not apply capillary tube indoor coils to these units 2 For Tubing Set lengths between 80 and 200 ft 24 38 and 60 96 m horizontal and or greater than 20 ft 6 1 m vertical differential an accessory Liquid Line Solenoid must be installed Table 2 Accessory Usage LOW AMBIENT COOLING REQUIRED FOR LONG LINE REQUIRED FORSEA Freduency interference ACCESSORY APPLICATIONS COAST APPLICATIONS A APPLICATIONS Over 80 ft 24 38 m Within 2 miles 3 22 km CONCerns in the Range Below 55 F 12 8 C of 2 to 30 MHZ Crankcase Heater Standard Standard Standard Standard Evaporator Freeze Protection Standard with Infinity Control No No No Liquid Line Solenoid Valve No Yes No No Low Ambient Control Standard with Infinity Control No No No Puron pat eater epon Yest Yest Yest Yest Support Feet Recommended No Recommended No Winter Start Control Standard with Infinity Standard with Infinity Standard with Infinity Standard with Infinity Control Control Control Control EMI Kit No No No Yes For tubing set lengths between 80 and 200 ft 24 38 and 60 96 m horizontal or 20 ft 6 10 m vertical differential total equivalent length an accessor
7. Conventional Dual Fuel Thermostat in an Emergency Mode 16 Table 7 Troubleshooting FLASH CODE RESET TIME FAULT DESCRIPTION SENT TO UI AMBER LED minutes Standby ON no flash Bae Variable Capacity or Emergency Mode 1 pause Variable Speed Range Cutback 1 2 sec ON longer pause 1 second OFF Communications Loss 16 NA Invalid Model 25 NA High Pressure Switch Open 31 15 Low Pressure Trip 32 15 Control Fault 45 NA Brownout 46 Revert to 5 min cycle delay Lost Inverter Communications 48 Revert to 5 min cycle delay 230VAC Dropout Reset Event 49 Revert to 5 min cycle delay Outdoor Air Temp Sensor Fault 53 NA Suction Temp Sensor Fault 54 15 Coil Temp Sensor Fault 55 NA OAT OCT Thermistor Out of range 56 NA Suction Pressure Sensor Fault 57 15 OAT OST Thermistor Out of range 58 5 Compressor Scroll Temp Out of Range 59 15 Compressor Sump Heating Active 68 2 HOURS Inverter Compressor Internal Fault 69 15 Compressor Motor Temp Out of Range 71 15 Suction Over Temperature 72 15 Inverter Temp Out of Range Event 75 15 Inverter Over Current 77 15 Compressor No Pump Event 79 15 Suction Over Temp Lockout 82 4 Hours Low Pressure Lockout for 4 hours 83 4 HOURS High Pressure Lockout for 4 hours 84 4 HOURS Compressor Temp Lockout 85 4 HOURS Compressor Temp Sensor Fault 86 15 Inverter Temp Lockout 88
8. System Functions and Sequence of Operation 6 nn 0 cect ee eee 8 10 Step 13 Check Charge s sass ecacdana apes aE EE ees vine ene ae ee RNR Yee thease ae Weel g 10 11 Step 14 Pumpdown amp Evacuation 2 ccs i ede ae eee eee cee end Sane eM elec ne Ene eles 11 MAJOR COMPONENTS ansan onini st SE AWE ee Eee ees Weer ee ees 12 TROUBLESHOOTING 633 jcnceniaoans bees detae gles bbe seen DONEREN EREK ERONEN EEEN Rigs EER EENAA 12 16 KINAG CHECKS o 2 iss cite Gan gates 4ais se gna Rad Gods Ags E AEE E ee us Rote RE Ea Gable Hate Sad eueeae aed 18 CARE AND MAINTENANCE cp secs ots oe ntina ri wins REEE KERRE ERE ate EEE EEEE E EIEEE dee E EEEa Ea 18 PURON REFRIGERANT QUICK REFERENCE GUIDE Information in these installation instructions pertains only to 25VNA series units SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire electrical shock or other conditions which may cause death personal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fi
9. This system can only be installed with Infinity indoor and user interface UI SYSTXCCUID01 V or SYSTXCCUIZ01 V or newer When using an Infinity User Interface airflow is automatically selected based on equipment size The user has the option of selecting Comfort Efficiency and Max airflow for Heating and or Cooling modes These should be selected based on balance between the homeowner s comfort and energy consumption expectations See User Interface Installation Instructions for additional available adjustments Due to using a communicating control with the fan coil or the furnace dip switch adjustments are not necessary The outdoor unit configuration and the indoor airflows are determined by communicating control setup 7 Step 10 Install Accessories _ HEAT PUMP CHECK There are no refrigeration circuit or electrical accessories required EETA OTON 3 CHARGE CALCULATION or available for installation within the unit External to the unit the IESET LENGTH same accessories such as the liquid line solenoid support feet snow rack wind baffle etc are available on other Carrier units can also be used on this line of product Refer to the individual Installation Instructions packaged with kits or accessories when 7 installing LINESET ABU Step 11 Start Up TOTAL 4 BACK A CAUTION A11104 Fig 9 Required Charge Adjustment Calculated in UI UNIT OPERATION AND SAFETY HAZARD Failure to follow this cauti
10. all flow control devices including solenoid valves A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation If ANY refrigerant tubing is buried provide a 6 in 152 4 mm vertical rise at service valve Refrigerant tubing lengths up to 36 in 914 4 mm may be buried without further special consideration Do not bury lines longer than 36 in Outdoor units may be connected to indoor section using accessory tubing package or field supplied refrigerant grade tubing of correct size and condition For tubing requirements beyond 80 ft 24 38 m substantial capacity and performance losses can occur Follow the pipe sizing recommendations in the 25VNA Product data to manage these losses Refer to Table 1 for field tubing diameters Refer to Table 2 for accessory requirements A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Do not leave system open to atmosphere any longer than minimum required for installation POE oil in compressor is extremely susceptible to moisture absorption Always keep ends of tubing sealed during installation Table 1 Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters in LIQUID VAPOR UNIT SIZE Connection Tube Connection Max Rated Minimum Tube Diameter Diameter Diameter Diameter Diameter 25VNA024 3 8 3
11. small quantity of charge remains in the OD unit that must be manually recovered if isolating refrigerant to indoor coil and lineset via HEAT mode PUMP DOWN Evacuation and Recovery of Refrigerant from within 25VNA Because this system has an EXV for the heating expansion device additional steps must be taken to open the EXV if the heat pump unit must be evacuated for service reasons If the EXV is not open when pulling a vacuum or recovering refrigerant from the heat pump unit extended evacuation time may be required and or inadequate vacuum obtained The UI User Interface has provisions to open the EXV for refrigerant recovery and or evacuation 1 Connect gages to 25VNA liquid and vapor or suction capil lary service ports to monitor operating pressures during and at completion of the procedure Attach recovery system or vacuum pump to gage set as needed for the service proced ure The service valves must be open to evacuate the unit through the line set service ports The suction capillary ser vice port is a direct connection to the suction port of the compressor 2 In the advanced menu of the UI go to Checkout gt Heat Pump gt gt Evacuation 3 Set desired time period Default time period for the proced ure is 120 minutes 4 Select START on UI to open the valve 5 Begin evacuation or refrigerant recovery as required for the procedure after UI indicates the EXV is open Power may be removed from heat pump after the UI in
12. specific inverter supplied with the unit A CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage and or improper operation Do not attempt to apply line voltage directly to the compressor This will destroy the compressor Electronic Expansion Valve EXV This unit uses an electronic expansion valve for refrigerant metering in the heating mode The control board drives the EXV to its proper position based on the operating mode and conditions The Infinity Control Service mode allows for manual opening and closing of the EXV for troubleshooting and pump down Field control Connections For normal operation use the ABCD Infinity connections only Only two wires AB are required See Fig 18 Discrete inputs Y C O are available for emergency operation if the Infinity Bus is not in operation Pressure Transducer SPT A 5 VDC output low pressure transducer that provides a 0 5 VDC data for interpretation by the control board for a O to 200 psig range of pressure at the suction tube This interpreted pressure data is then intelligently used by the control board for low pressure cut out loss of charge management compressor overall envelope management oil circulation management lubrication management and EXV control See Fig 17 Compressor Control Contactor The contactor has a 24 volt coil The electronic control board controls the operation of the contactor TROUBLESHOOTING
13. the appropriate fault code temporarily Pressure Switch Protection The outdoor unit is equipped with high pressure switch If the control senses the opening of a high pressure switch it will respond as follows 1 De energize the contactor 2 Keep the outdoor fan operating for 15 minutes 3 Display the appropriate fault code see Table 7 4 After a 15 minute delay if there is a call for cooling or heat ing and HPS is reset the contactor is energized 5 If HPS has not closed after a 15 minute delay the outdoor fan is turned off If the open switch closes anytime after the 15 minute delay then resume operation with a call for cool ing or heating at a temporary reduced capacity 6 If HPS trips 3 consecutive cycles the unit operation is locked out for 4 hours 7 In the event of a high pressure switch trip or high pressure lockout check the refrigerant charge outdoor fan operation and outdoor coil in cooling for airflow restrictions or in door airflow in heating 8 In the event of a low pressure trip or low pressure lockout check the refrigerant charge and indoor airflow cooling and outdoor fan operation and outdoor coil in heating Control Fault If the outdoor unit control board has failed the control will flash the appropriate fault code see Table 7 The control board should be replaced 12 Brown Out Protection If the line voltage is less than 187v for at least 4 seconds the contactor and fan relay
14. the dwelling and in extreme cases tubing breakage OUTDOOR WALL INDOOR WALL CAULK LIQUID TUBE A E SUCTION TUBE INSULATION THROUGH THE WALL Paa INSULATION SUCTION TUBE HANGER STRAP AROUND SUCTION TUBE ONLY lo O ie 1 25 4mm MIN LIQUID TUBE SUSPENSION A07588 Fig 1 Connecting Tubing Installation The outdoor unit contains the correct amount of refrigerant charge for operation with AHRI rated and factory approved smallest indoor unit when connected by 15 ft 4 57 m of field supplied or factory accessory tubing Adjust refrigerant charge by adding or removing the charge to from the unit depending on lineset length and indoor unit as calculated and displayed on the UI The user interface UI calculates required charge adjustment and total system charge required For proper unit operation check refrigerant charge using charging information in the Check Charge section of this instruction IMPORTANT Liquid line size is 3 8 in OD for all 25VNA applications including long line applications IMPORTANT Always install the factory supplied liquid line filter drier Obtain replacement filter driers from your distributor or branch IMPORTANT Always install the factory supplied muffler part LM10KK003 on the vapor line as described in the Factory Supplied Muffler Installation section of these instructions Obtain replacement mufflers from y
15. 25VNA Infinity Variable Speed Heat Pump with Greenspeed Intelligence 2 to 5 Nominal Tons i turn to the experts fH Installation Instructions NOTE Read the entire instruction manual before starting the installation TABLE OF CONTENTS PAGE NO SAFETY CONSIDERATIONS peec 00 e E nee e nent e eens 2 INSTALLATION RECOMMENDATIONS 0 00 c ccc eee cee eee unnn 3 INSTALLATION i633 chee teei Shee ee ied ER tied ee bled nels iiedewe abies PENEDOS PENG DEREI 3 11 Step 1 Check Equipment and Jobsite 6 6 ttt e eens 4 Step 2 Install on Solid Pad 0 0 20 ee reret E eee ee bee Hee Eee eee cee ee ee EEA 4 Step 3 Clearance Requirements ogi c cs sete ciaieis tenes EEEE ETETE EE OEE E E ies A 4 Step 4 Operating AMDIENE 5 2 esas seins nimi KER ENE EA AAE A EREE ee EE ele eee gales EE 4 Step d Elevate Umit sinna e EE tte E E E EEE EEE E EE E apace la 4 Step 6 Liquid Line Solenoid Valve LSV onunnnsenssnusunrrrresesonrrrrrrsrrsererrrerrrene 4 Step 7 Making Piping Connections 0 eee tne t eens 5 6 Step 8 Make Electrical Connections s i 4 ic0adesg oa ede bees bow area ERE Riad eee ona Sede Dea 7 Step 9 Compressor Crankcase Heater 2 0 ccc ct eee tee eee beens eee e nee RES 7 Step 10 Install Accessories 0 0 ce E EE E Ea EEE A a E E Eea e Ea ERa 8 St p 11 Start Up seseris ees beet aye eeaee ee eee hee PEPR E Ee DER EEE EREE EE EERE EEE RES 8 Step 12
16. 80 100 120 TEMPERATURE DEG F A91431 Fig 14 Thermistor Resistance Versus Temperature If the outdoor air or coil thermistor should fail the control will flash the appropriate fault code see Table 7 IMPORTANT The outdoor air thermistor coil thermistor and suction thermistor should be factory mounted in the final locations Check to ensure thermistors are mounted properly See Fig 15 16 and 17 Thermistor Sensor Comparison The control continuously monitors and compares the outdoor air temperature sensor and outdoor coil temperature sensor to ensure proper operating conditions The comparison is e In cooling if the outdoor air sensor indicates 10 F gt 5 6 C warmer than the coil sensor or the outdoor air sensor indicates 20 F gt 11 C cooler than the coil sensor the sensors are out of range In heating if the outdoor air sensor indicates 35 F 19 4 C warmer than the coil sensor or the outdoor air sensor indicates 10 F 5 6 C cooler than the coil sensor the sensors are out of range If the sensors are out of range the control will flash the appropriate fault code as shown in Table 7 The thermistor comparisons are not performed during low ambient cooling or defrost operation Failed Thermistor Default Operation Factory defaults have been provided in the event of failure of outdoor air thermistor OAT and or outdoor coil thermistor OCT If the OAT sensor should fa
17. T Attachment On Distributor Tube 13 PRESSURE TRANSDUCER SPT ACCUMULATOR TUBE SUCTION TUBE SUCTION THERMISTOR OST ACCUMULATOR REVERSING VALVE SUCTION SERVICE VALVE A11103 Fig 17 Suction Thermistor OST Attachment On Suction Tube Suction Thermistor OST Suction Thermistor is used for assisting in EXV control and must be secured on the suction tube and aligned longitudinally to the vertical surface of the tube axis see Fig 17 A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation In order to minimize the ambient influence make sure the thermistor curved surface hugs the pipe surface and is secured tight using the wire tie fished through the original slot insulating polymer body Variable Speed Compressor Sensor Output Terminals This compressor has a motor thermistor and a scroll thermistor Correct resistance between scroll thermistor terminal and common is 10k at 77 F 25 C Correct resistance between motor thermistor terminal and common is 5k at 77 F 25 C Variable Speed Compressor Power Input Terminals This compressor operates with a 3 phase variable frequency PWM variable voltage to the three fusite terminals Table 5 Variable Speed Compressor Resistances winding resistance at 70 F 20 F 25VNA024 25VNA048 WINDING 25VNA036 25VNA060 Between terminals T1 T2 and T3 691 203 Between term
18. and v porservice valyes The conventional thermostat inputs is designed to work for emergency operation only Connections are Y O and C The system will only operate at maximum capacity heating or cooling The user interface UI displays the operation mode and fault codes as specified in the troubleshooting section See Table 5 for codes and definitions NOTE Only one code will be displayed on the outdoor unit control board the most recent with the highest priority The latest codes are stored and can be access via the UI Crankcase Heater Operation This unit has an internal crankcase heater that will be energized during the off cycle and is intelligently demanded by the system to prevent the compressor from being the coldest part of the system thus enhancing the reliability The crankcase heater will function as needed any time the outdoor unit is powered The indoor unit and UI do not need to be installed for the crankcase heater to operate properly NOTE Contactor may close intermittently without the unit starting This is done to determine whether the control needs to energize the crankcase heater Closing the contactor powers the inverter and allows the system to check compressor temperature Outdoor Fan Motor Operation The outdoor unit control Fig 11 energizes outdoor fan anytime compressor is operating except for defrost and as needed during low ambient cooling operation The outdoor fan remains energized if a pressure s
19. are de energized Compressor and fan operation are not allowed until voltage is a minimum of 190v The control will flash the appropriate fault code see Table 7 230V Line Power Disconnect Detection If there is no 230v at the contactor when the indoor unit is powered with a cooling or heating demand the appropriate fault code is displayed Verify the disconnect is closed and 230v wiring is connected to the unit Inverter Voltage Sensing The control board senses the presence or absence of 230 V through the feedback from inverter The control monitors the high voltage to the inverter Voltage should be present anytime the contactor is energized and voltage should not be present when the contactor is de energized Temperature Thermistors Thermistors are electronic devices which sense temperature As the temperature increases the resistance decreases Thermistors are used to sense outdoor air OAT coil temperature OCT and the suction line thermistor OST located between the reversing valve and the accumulator Refer to Table 4 and Fig 14 for resistance values versus temperature Table 4 Resistance Values versus Temperature TEMPERATURE RESISTANCE ohms 25 0 C 77 0 F 10 0 2 3 0 0 C 32 0 F 32 6 3 2 28 0 C 18 4 F 85 5 3 4 THERMISTOR CURVE h4 h4 F4 4 RESISTANCE KOHMS T meet T i T i T T 1 0 20 40 60
20. ations such as bedrooms when a lineset is mounted to ceiling joists or floor joists the out door unit must be located at least 10 ft 3 05 m away If this is not possible create a line set configuration with enough bends to provide 10 ft 3 05 m of total line set length outside the dwelling 3 Ensure that vapor and liquid tube diameters are appropriate for unit capacity 4 Run refrigerant tubes as directly as possible by avoiding un necessary turns and bends 5 Leave some slack between structure and unit to absorb vi bration 6 When passing refrigerant tubes through the wall seal open ing with RTV or other pliable silicon based caulk see Fig 1 7 Avoid direct tubing contact with water pipes duct work floor joists wall studs floors and walls 8 Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing see Fig 1 9 Ensure that tubing insulation is pliable and completely sur rounds vapor tube 10 When necessary use hanger straps which are 1 in wide and conform to shape of tubing insulation See Fig 1 11 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation A CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage If proper lineset routing techniques are not followed variable speed systems can be susceptible to lineset transmitted noise inside
21. ature to drop to 80 F 26 67 C before attempting to check system charge by subcooling method as described above If the indoor temperature is below 70 F 21 11 C or the outdoor temperature is not in the favorable range adjust charge for line set length above or below 15ft 4 57 m only Charge level should then be appropriate for the system to achieve rated capacity The charge level could then be checked at another time when the both indoor and outdoor temperatures are in a more favorable range This ensures maximum efficiency and reliability Heating Check Chart Procedure In heating mode the required charging method is by weigh in On new installation or complete recharge refer to the REQUIRED CHARGE CALCULATION screen in the user interface UI to obtain the required charge adjustment and or total charge required Use the UI and Heating Check Charts Fig 12 and 13 to check system operation during heating mode The indoor conditions must be between 60 F 15 6 C and 80 F 26 7 C to check the charge The outdoor coil must be dry and ice frost free Do not check for pressure agreement if the outdoor has rain mist or snow present Use the Defrost CHECKOUT mode to remove ice or frost from coil if present prior to checking the heating pressures To use the Heating Check Chart the user interface UI must be in CHARGING mode These charts indicate whether a correct relationship exists between system operating pressure and air
22. dicates READY TO EVACUATE 6 Remove power from indoor and heat pump unit prior to ser vicing unit The EXV will retain the open position NOTE See service training materials for troubleshooting the EXV using EXV CHECK mode 11 MAJOR COMPONENTS Variable speed Control Board The HP control board controls the following functions e Compressor speed e Contactor operation e Outdoor fan motor operation e Reversing valve operation e Defrost operation e Low ambient cooling e Crankcase heater operation e Pressure switch monitoring e Time Delays e Pressure Transducer e EXV operation control e Inverter communication and control Inverter The inverter is located inside the control box This is an air cooled device that communicates with the control board and drives the compressor to the demanded RPM When the contactor closes it powers the inverter with line voltage The inverter changes the line voltage to 410 volts DC 3 phase and varies the frequency to drive the compressor at the desired RPM NOTE Manually closing the contactor will not cause the unit to operate The unit must be operated with an Infinity Control A standard thermostat will allow operation only in the emergency mode high speed heating or cooling Variable Speed Compressor This unit contains a variable speed compressor that has a wide operating range It operates on 410vdc provided by the inverter This compressor can only be operated by the
23. e UI User Interface has provisions to assist in performing this function 1 Connect gages to 25VNA liquid and vapor or suction capil lary service ports to monitor operating pressures during and at completion of the procedure 2 In the advanced menu of the UI go to Checkout gt Heat Pump gt Pumpdown 3 Select mode to pump down in COOL or HEAT COOL mode allows refrigerant to be isolated in outdoor unit HEAT mode allows the refrigerant to be isolated in indoor coil and lineset Set desired time period Default time peri od for the procedure is 120 minutes 4 Select Start on UI to begin the pumpdown process Unit will begin running in selected mode after a brief delay 5 Close the liquid service valve 6 The unit will run in selected mode with the low pressure protection set to indicate pumpdown is complete when the suction pressure drops below 0 psig Compressor protec tions are still active to prevent damage to the compressor or inverter high pressure high current high torque scroll temperature etc 7 Once system indicates pumpdown complete or failure to complete shutdown close vapor service valve 8 If pumpdown does not complete due to compressor safety shutdown a recovery system will be required to remove fi nal quantity of refrigerant from indoor coil and line set 9 Remove power from indoor and heat pump unit prior to ser vicing unit Fig 13 Heating Pressure Check Chart 25VNA048 060 NOTE A
24. e unit rating plate Do not install unit in system where voltage may fluctuate above or below permissible limits NOTE Use copper wire only between disconnect switch and unit NOTE Install branch circuit disconnect of adequate size per NEC to handle unit starting current Locate disconnect within sight from and readily accessible from unit per Section 440 14 of NEC Route Ground and Power Wires Remove access panel to gain access to unit wiring Extend wires from disconnect through power wiring hole provided and into unit control box A WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes Connect Ground and Power Wires Connect ground wire to ground connection in control box for safety Connect power wiring to contactor as shown in Fig 8 DISCONNECT PER N E C AND OR LOCAL CODES CONTACTOR FIELD POWER O e eo me ee ee FIELD GROUND ee DD MIRING GROUND LUG A91056 Fig 8 Line Power Connections Connect Control Wirin Connect to Infinity connections Only two wires AB to Infinity capable indoor unit furnace or fan coil is required Typical 4 wire ABCD may be connected see Fig 18
25. etween code repeating is 2 5 seconds with LED OFF Codes are easily read from user interface UI EXAMPLE 3 short flashes followed by 2 long flashes indicates a 32 code Table 7 shows this to be low pressure switch open Furnace or Fan Coil User Interface UI 25VNA HP CandD not required on 25VNA Heat Pump Humidifier A11144 Fig 18 Infinity Furnace or Fan Coil Wiring with Communicating Variable Speed HP Emergency Mode Connections with a Conventional Dual Fuel Thermostat In an emergency it is possible to replace the UI with a conventional heat pump thermostat must be dual fuel capable if using a furnace see Fig 21 for wiring However this emergency mode operation is limited to a single maximum compressor speed in heating and a single maximum cooling speed 14 ri SEC Paz Furl Fi pe U BRN t a yy a eof BB gi l vuri i g g F ER a aE a in E g pi FF _t H Hi t fe aa C rs ico oe TI FORCED HATTA BCH IT IUT HKSBEA014 Utility Interface FROM UTILITY PROVIDER A11381 Fig 19 Variable Speed Control Board with optional Utility Relay PREZ PWN ry ry muj v A11379 Fig 20 Variable Speed Control Board connected to optional Liquid Line Solenoid 15 Fan Coil or Furnace 25VHA Conventional Dual Fuel Thermostat A11382 Fig 21 Variable Speed Unit Connected to a
26. his warning could result in personal injury or death Before installing modifying or servicing system main electrical disconnect switch must be in the OFF position There may be more than 1 disconnect switch Lock out and tag switch with a suitable warning label A WARNING ELECTRICAL HAZARD HIGH VOLTAGE Failure to follow this warning could result in personal injury or death Electrical components may hold charge DO NOT remove control box cover for 2 minutes after power has been removed from unit PRIOR TO TOUCHING ELECTRICAL COMPONENTS Verify zero 0 voltage at inverter connections shown on inverter cover Inverter Cover IMPORTANT The inverter cover should NEVER be removed because there is no reason to remove the inverter cover to access the inverter The inverter is not serviceable A replacement cover is provided with a replacement inverter A WARNING UNIT OPERATION AND SAFETY HAZARD Failure to follow this warning could result in personal injury or equipment damage Puron refrigerant systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or components on Puron refrigerant equipment Installation Recommendations In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment 1 Locate unit away from windows patios decks etc where unit operation sound may disturb customer 2 In noise sensitive applic
27. il low ambient cooling will not be allowed and the one minute outdoor fan off delay will not occur Defrost will be initiated based on coil temperature and time If the OCT sensor should fail low ambient cooling will not be allowed Defrost will occur at each time interval during heating operation but will terminate after 5 minutes If there is a thermistor out of range error defrost will occur at each time interval during heating operation but will terminate after 5 minutes Count the number of short and long flashes to determine the appropriate flash code Table 7 gives possible causes and actions related to each error Outdoor Coil Thermistor The outdoor coil thermistor is a 10Kohm resistor used for multiple system operations It provides the coil liquid line temperature to the heat pump board and user interface Low ambient operation defrost initiation defrost termination and assistance with OAT temperature measurement of some of the functions The sensor must be securely mounted to the tube connecting the EXV and distributor See Fig 15 for proper placement See Table 4 for proper resistances OAT Thermistor must be locked in place with spherical nib end facing towards the front of the ontrol box A11142 Fig 15 OAT Thermistor Location Bottom of Control Box OCT SENSOR LOCATION A11143 Fig 16 Outdoor Coil Thermistor OC
28. inal amp ground gt 1 mega OHM gt 1 mega OHM A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage and or improper operation Do not use Meggar for measuring the winding resistance ECM Fan Motor If verification of proper operation is required for the ECM motor used in this unit follow these steps 1 Verify that the 230v input to the transformer is present 2 Verify that the control board is powered 18 volts to 30 volts from the transformer 3 With the UI in charging mode in cooling measure the DC voltage between the PWM 1 and PWM 2 terminals on the outdoor control board The DC voltage and PWM option al measured must be as shown in Table 6 Table 6 DC Voltage and PWM Measurement Terminals Voltage PWM 2T and 3T 8 9 VDC 52 4T and 5T 11 1 VDC 84 Status Codes Table 7 shows the status codes flashed by the amber status light Most system problems can be diagnosed by reading the status code as flashed by the amber status light on the control board The codes are flashed by a series of short and long flashes of the status light The short flashes indicate the first digit in the status code followed by long flashes indicating the second digit of the error code The short flash is 0 25 seconds ON and the long flash is 1 0 second ON Time between flashes is 0 25 seconds Time between short flash and first long flash is 1 0 second Time b
29. nders are rose colored Recovery cylinder service pressure rating must be 400 psig DOT 4BA400 or DOT BW400 Puron refrigerant systems should be charged with liquid refrigerant Use a commercial type metering device in the manifold hose when charging into suction line with compressor operating Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low side retard Use hoses with 700 psig service pressure rating Leak detectors should be designed to detect HFC refrigerant Puron refrigerant as with other HFCs is only compatible with POE oils Vacuum pumps will not remove moisture from oil Do not use liquid line filter driers with rated working pressures less than 600 psig Do not leave Puron refrigerant suction line filter driers in line longer than 72 hours e Do not install a suction line filter drier in liquid line POE oils absorb moisture rapidly Do not expose oil to atmosphere POE oils may cause damage to certain plastics and roofing materials Wrap all filter driers and service valves with wet cloth when brazing A factory approved liquid line filter drier is required on every unit Do NOT use an R 22 TXV If indoor unit is equipped with an R 22 TXV or piston metering device it must be changed to a hard shutoff Puron refrigerant TXV Never open system to atmosphere while it is under a vacuum When system must be opened for service recover refrigerant evacuate then break vacuum with dr
30. nstallation A05227 Fig 6 Liquid Line Filter Drier Refrigerant Tubing connection Outdoor Connect vapor tube to fitting on outdoor unit vapor service valves see Table 1 NO Installation of Adapter Tube Although it is a heat pump this unit has a standard AC liquid service valve An EXV inside the unit serves as the heating expansion device Sweat Connections A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation e Use a brazing shield e Wrap service valves with wet cloth or heat sink material Use refrigerant grade tubing Service valves are closed from factory and ready for brazing After wrapping service valve with a wet cloth braze sweat connections using industry accepted methods and materials Consult local code requirements Refrigerant tubing and indoor coil are now ready for leak testing This check should include all field and factory joints Evacuate Refrigerant Tubing and Indoor Coil A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate triple evacuation method may be used See Service Manual for triple evacuation method Always break a vacuum with dry nitrogen prior to o
31. on may result in minor personal 4 Set User Interface to operate cooling in CHARGING mode injury equipment damage or improper operation Charging mode operates system compressor speed and fan speeds to proper conditions to check the refrigerant charge NOTE Do not check charge in a mode other than CHARGING 5 Wait for the specified stabilization time depending on lineset length Compare subcooling at liquid line service valve to Liquid Line Subcooling Target as shown CHAR 4 Dome temperatures may be hot GING screen LiqLin SC TGT see Fig 10 Observe the following 1 Do not overcharge system with refrigerant 2 Do not operate unit in a vacuum or at negative pressure 3 Do not disable low pressure switch CHARGING A CAUTION HEAT PUMP COMPRESSOR RPM PERSONAL INJURY HAZARD EPRORI Failure to follow this caution may result in personal injury aul uu Wear safety glasses protective clothing and gloves when Su i i EX handling refrigerant rin AIR Lib WA A CAUTION ST 45 ENVIRONMENTAL HAZARD Aitos Failure to follow this caution may result in environmental Fig 10 Liquid Line Subcooling Target damage Federal regulations require that you do not vent Step 12 System Functions And Sequence Of refrigerant to the atmosphere Recover during system Operation repair or final unit disposal The 25VNA models utilize an Infinity Communicating User Interface UI With a call for cooling the outdoor fan and comp
32. ou distributor or branch INSTALLATION Specifications for this unit in residential new construction market require the outdoor unit indoor unit including metering device refrigerant tubing sets and filter drier and muffler listed in pre sale literature There can be no deviation Consult the Service Manual Air Conditioners and Heat Pumps Using Puron Refrigerant to obtain required unit changes for specific applications and for R 22 retrofit Step 1 Check Equipment and Job Site Unpack Unit Move to final location Remove carton taking care not to damage unit This unit employs one louver spacer on each of the four sides to prevent louver movement during operation The louver spacers are trapped between the coil surface and louver at the approximate center of each side See Fig 2 This louver spacer should be present and if dislodged during shipment must be reinstalled before unit is placed into operation Louver Spacer NL A11380 Fig 2 Louver Spacer Location Inspect Equipment File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating plate on unit corner panel It contains information needed to properly install unit Check rating plate to be sure unit matches job specifications Step 2 Install on a Solid Level Mounting Pad If conditions or local codes require the unit be attached to pad tie down bolts should be used and fastened through knockout
33. pening the refrigerant system for servicing Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gauge capable of accurately measuring this vacuum depth The deep vacuum method is the most positive way of assuring a system is free of air and liquid water See Fig 7 5000 4500 4000 gi a 2500 Q 2000 1500 1000 500 LEAK IN SYSTEM VACUUM TIGHT TOO WET TIGHT DRY SYSTEM 0 1 2 3 4 5 6 7 MINUTES A95424 Fig 7 Deep Vacuum Graph Final Tubing Check IMPORTANT Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment Ensure tubes are not rubbing against each other or any sheet metal Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight Step 8 Make Electrical Connections amp WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Do not supply power to unit with compressor terminal box cover removed Be sure field wiring complies with local and national fire safety and electrical codes and voltage to system is within limits shown on unit rating plate Contact local power company for correction of improper voltage See unit rating plate for recommended circuit protection device NOTE Operation of unit on improper line voltage constitutes abuse and could affect unit reliability Se
34. r Service 350 valve Pressure 80 F D 07C i cil Ds e E ee e e w S e o ed S 200 Refrigerant Pressure psig Refrigerant Pressure KPa n eee S e l ll 0 20 30 40 50 60 48 C 42c 7 C 40 C arc 10 C 16 C Outdoor Ambient Temperature F C A11140 A11141 25VNA024 036 Heating Pressure check Chart Psig 25VNA048 060 Heating Pressure check Chart Psig Indoor Temperature F Indoor Temperature F p S B 60 70 80 E 60 70 80 High Low High Low High Low High Low High Low High Low 60 324 121 360 120 407 121 60 324 121 360 120 407 121 50 293 99 333 100 300 102 50 293 99 333 100 380 102 40 277 87 307 80 360 88 40 277 87 307 80 360 88 30 257 69 288 65 333 69 30 257 69 288 65 333 69 20 242 57 281 60 320 60 20 242 57 281 60 320 60 10 232 50 263 47 306 50 10 232 50 263 47 306 50 0 218 42 253 43 288 42 0 218 42 253 43 288 42 Fig 12 Heating Pressure Check Chart 25VNA024 036 Step 14 Pumpdown amp Evacuation If this system requires either a Pump Down or Evacuation for any reason the procedures below must be followed Pump Down Because this system has an inverter controlled compressor suction pressure transducer and EXV conventional procedure cannot be used to pump down and isolate the refrigerant into the outdoor unit Th
35. re extinguisher available Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and current editions of the National Electrical Code NEC NFPA 70 In Canada refer to current editions of the Canadian electrical code CSA 22 1 Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation 4A CAUTION CUT HAZARD Failure to follow this caution may result in personal injury Sheet metal parts may have sharp edges or burrs Use care and wear appropriate protective clothing and gloves when handling parts Indoor Thermostat Control Options Infinity Model Control 25VNA Yes Requires model SYSTXCCUIDO1 V or SYSTXCCUIZ01 V or newer amp WARNING ELECTRICAL SHOCK HAZARD Failure to follow t
36. rection maintaining at least 12 in 304 8 mm straight pipe length from the OD unit See Fig 5 e Maintain at least 12 in 304 8 mm to any bend from the muffler shell inlet and outlet stubs EXTERIOR a WALL A 304 8 mm MIN MUFFLER i ia 304 8 mm MIN ly TO DWELLING ae NT J te LS vapor Line VAPOR SERVICE VALVE 304 8 mm MIN EXTERIOR WALL MUFFLER A 3 TO DWELLING i Ir pany he 304 8 mm MIN VAPOR SERVICE VALVE VAPOR LINE A11108 Fig 5 Muffler I
37. ressor are energized to run at lowest cooling demand If this does not satisfy cooling demand the system will ramp up in stages the ID and OD units to assess the user interface UI Keep until it satisfies the demand After coping with the higher demand system in off mode Under the Advanced function menu the unit returns to lower capacity operation until the demand is assess the REQUIRED CHARGE CALCULATION screen satisfied or until an increase in demand Enter the lineset length and vapor tube diameter The user interface UI will now display the required charge adjust ment see Fig 9 for the lineset and an adjustment for a large indoor coil if recognized as such by the UI Follow these steps to properly start up the system 1 After system is evacuated close the disconnects to energize When all demand is satisfied the compressor will shut off As the unit operates at lower capacity system vapor suction pressure will be higher than it is during a standard single stage system operation or during a higher capacity operation When the outdoor ambient is more the 100 F 37 8 C the outdoor fan will continue to run for one minute after compressor shuts off This reduces pressure differential for easier starting in the next cycle 2 Add or remove the required charge adjustment for lineset length to liquid service valve Note If lineset is less than 15 feet 9 4 C charge re moval may be necessary of TRIS opet MaMa
38. rigerant system to stabilize Utility Interface With Infinity Control The utility curtailment relay should be wired between UTIL and C connections on the control board for this Infinity Communicating System see Fig 19 This input allows a power utility device to interrupt compressor operation during peak load periods When the utility sends a signal to shut the system down the User Interface will display Curtailment Active See UI installation instructions for setup details Communication and Status Function Lights Infinity Control Green Communications COMM Light A green LED COMM light on the outdoor board see Fig 11 indicates successful communication with the other system products The green LED will remain OFF until communication is established Once a valid command is received the green LED will turn ON continuously If no communication is received within 2 minutes the LED will be turned OFF until the next valid communication Amber Status Light Amber colored STATUS light indicates operation and error status See Table 7 for definitions e Two minute time delay to return to standby operation from last valid communication e One minute time delay of outdoor fan at termination of cooling mode when outdoor ambient is greater than or equal to 100 F 37 8 C e Fifteen second delay at termination of defrost before the auxiliary heat is de energized
39. s provided in unit base pan Refer to unit mounting pattern in Fig 3 to determine base pan size and knockout hole location For hurricane tie downs contact distributor for details and PE Professional Engineer Certification if required On rooftop applications mount on level platform or frame Place unit above a load bearing wall and isolate unit and tubing set from structure Arrange supporting members to adequately support unit and minimize transmission of vibration to building Consult local codes governing rooftop applications Roof mounted units exposed to winds above 5 mph may require wind baffles Consult the Service Manual Residential Split System Air Conditioners and Heat Pumps Using Puron Refrigerant for wind baffle construction NOTE Unit must be level to within 2 3 8 in ft 9 5 mm m per compressor manufacturer specifications Step 3 Clearance Requirements When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 24 in 609 6 mm clearance to service end of unit and 48 in 1219 2 mm above unit For proper airflow a 6 in 152 4 mm clearance on 1 side of unit and 12 in 304 8 mm on all remaining sides must be maintained Maintain a distance of 24 in 609 6 mm between units Position so water snow or ice from roof or eaves cannot fall directly on unit On rooftop applications locate unit at least 6 in 152 4 mm above roof surface 3 8 in
40. s the next defrost interval 120 minutes e When defrost time 3 5 minutes the next defrost interval 90 minutes e When defrost time 5 7 minutes the next defrost interval 60 minutes e When defrost time gt 7 minutes the next defrost interval 30 minutes The control board accumulates compressor run time As the accumulated run time approaches the selected defrost interval time the control board monitors the coil temperature sensor for a defrost demand If a defrost demand exists a defrost cycle will be initiated at the end of the selected time interval A defrost demand exists when the coil temperature is at or below 32 F 0 C for 4 minutes during the interval If the coil temperature does not reach 32 F 0 C within the interval the interval timer will be reset and start over Upon initial power up the first defrost interval is defaulted to 30 minutes Remaining intervals are at selected times e Defrost is only allowed to occur below 50 F 10 C outdoor ambient temperature The defrost cycle is terminated as described below e When OAT is gt 35 F 1 67 C defrost terminates if outdoor coil temperature gt 50 F 10 C e When OAT lt 35 F 1 7 C defrost will terminate if OCT is gt 45 F 4 4 C Or 10 minutes has passed At the defrost termination the outdoor fan output ODF will turn on 15 seconds before the reversing valve switching NOTE Compressor speed during defrost varies based on o
41. temperature entering indoor and outdoor units If pressure and temperature do not match on chart system refrigerant charge may not be correct DO NOT USE CHART TO ADJUST REFRIGERANT CHARGE NOTE High pressure is at vapor service valve Add 12 psig if high pressure is taken from liquid service valve NOTE When charging is necessary during heating season charge must be weighed in accordance with unit rating plate 0 6 oz ft 17 74 g m of 3 8 in liquid line above or below 15 ft 4 57 m respectively NOTE In heating mode check refrigerant pressures only when user interface is in CHARGING mode and indicates stable If charge is in doubt remove charge and weigh in correct calculated refrigerant charge 10 Charging In Cooling Mode 25VNA024 036 See user interface set in Charging Mode Charging In Cooling Mode 25VNA048 060 See user interface set in Charging Mode Heating Check Chart 25VNA024 036 For use in Heating Charging Mode only Ss Ss w a S Vapor Service 4 Valve Pressure 2068 w S s w a S 1724 1380 a S 1034 Refrigerant Pressure psig n 8 s Refrigerant Pressure KPa a S S 690 Suction Pressure wo 5 o 0 10 20 30 40 50 60 48c 12c ere 40 C arc 10 C 16 C Outdoor Ambient Temperature F C Heating Check Chart 25VNA048 060 For use in Heating Charging Mode only 450 400 a c Vapo
42. tions if outside of this range Do not charge if outside 65 F 18 C and 100 F 38 C outdoor temperature If the range is acceptable go the CHARGING screen in the user interface UI At cooling conditions set the user interface UI to check the charge in cooling mode Allow system to operate in cooling mode for the stabilization period as indicated in the user interface UI Once conditions are indicated as favorable and stable by the user interface UI check the system charge by subcooling method Compare the subcooling taken at the liquid service valve to the subcooling target LiqLin SC TGT listed on the charging screen Add refrigerant if the subcooling is low and remove charge if subcooling is high Tolerance should be 2 F If any adjustment is necessary add or remove the charge slowly no greater than 0 5 Ib per minute and allow system to operate for 15 minutes to stabilize before declaring a properly charged system The use of a commercial charge metering device restrictor such as Imperial liquid low side charger model 535 C or Watsco ChargeFaster model CH200 is recommended when adding refrigerant to an operating system This prevents potential damage of liquid slugging of the compressor and allows the subcooling to stabilize quicker If the indoor temperature is above 80 F 26 67 C and the outdoor temperature is in the favorable range adjust system charge by weight based on line length and allow the indoor temper
43. tween indoor and outdoor unit is greater than 20 ft 6 10 m follow the piping configuration and liquid line solenoid valve LSV accessory requirements from the Residential Piping and Long line guideline CCH start gear and piston changes do not apply If required by Long Line Guideline install LSV kit part no KHALS0401LLS specifically designed for Puron refrigerant heat pumps LSV should be installed within 2 ft 0 61 m of outdoor unit with flow arrow pointing toward outdoor unit Make the necessary electrical connections as shown on Fig 20 and by following the Installation Instructions included with accessory kit IMPORTANT Flow arrow must point toward outdoor unit Variable Furnace or Speed User Interface Fan Coil HP Q e a ON ae eis J a fe ee LA pe aoa n ks Le kmi 71 B ABCD c J___white loc Connection optional c A A e g D Seen rane eas H D D LLS 1 Optional Remote Room Sensor 1 1 Ls i A11107 Fig 4 Liquid Line Solenoid Electrical Connection Required for long line applications Step 7 Make Piping Connections amp WARNING PERSONAL INJURY AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or death Relieve pressure and recover all refrigerant before system repair or final unit disposal Use all service ports and open
44. utdoor conditions Step 13 Check Charge Charge in CHARGING mode Factory charge amount and desired subcooling are shown in the user interface UI To properly check or adjust charge conditions must be favorable for subcooling charging in cooling mode Favorable conditions exist when the outdoor temperature is between 65 F and 100 F 18 C and 38 C and the indoor temperature is between 70 F and 80 F 21 C and 27 C If the temperatures are outside of these ranges weigh in charge only If confirmation is needed return and check subcooling when the temperatures are within the desired range Charging Procedure Unit is factory charged for 15ft 4 57 m of lineset and for smaller rated indoor coil combinations If any refrigerant charge adjustment is required based on the indoor coil combination you select and the line set length you input the UI will calculate and display the target subcooling and the amount of additional charge to be added Therefore UI is your source of information for charging the system correctly Refrigerant charge adjustment amount for adding or removing 0 6 oz ft 17 74 g m of 3 8 liquid line above or below 15ft 4 57 m respectively and an additional amount of refrigerant charge adjustment 2 lbs for a large ID coil if required is calculated and displayed by the UI Perform a final charge check only when in cooling and OD is between 65 F 18 C and 100 F 38 C NOTE UI indicates acceptable condi
45. witch opens or compressor scroll over temperature should occur This OD fan is an ECM motor which operates at varying speeds depending on the ambient and the demand Time Delays The unit time delays include e Five minute time delay to start cooling or heating operation when there is a call from the user interface To bypass this feature momentarily short and release Forced Defrost pins e Five minute compressor re cycle delay on return from a brown out condition e See Tab le 7 for other delay information General Information Infinity Controlled low ambient cooling This unit is capable of low ambient cooling down to 0 F 17 8 C with Low Ambient enabled on the Infinity Control A low ambient kit is not required The only accessory that may be required is wind baffles in locations which are likely to experience cross winds in excess of 5 miles an hour This generally occurs only on roof and open area applications The Infinity Control provides an automatic evaporator freeze thermostat Low ambient cooling must be enabled in the User Interface setup Fan may not begin to cycle until about 40 F 4 4 C OAT Fan will cycle based on coil and outdoor air temperature Infinity controlled low ambient mode operates as follows e Fan is OFF when outdoor coil temperature is too low 55 F 12 7 C the saturated suction pressure indicates a freezing indoor coil or outdoor fan has been ON for 30 minutes Fan is turned off to allow ref
46. y Liquid Line Solenoid must be installed t Required on all indoor units Standard on all new Puron refrigerant fan coils and furnace coils Standard Standard for all new Puron refrigerant fan coils and furnace coils Outdoor Unit Connected to Factory Approved Indoor Unit Outdoor unit contains correct system refrigerant charge for operation with factory approved AHRI rated smallest indoor unit when connected by 15 ft 4 57 m of field supplied or factory accessory tubing and factory supplied filter drier Check refrigerant charge for maximum efficiency NOTE If the indoor furnace coil width is more than the furnace casing width refer to the indoor coil Installation Instructions for transition requirements Install Liquid Line Filter Drier Indoor Refer to Fig 6 and install filter drier as follows 1 Braze 5 in 127 mm liquid tube to the indoor coil 2 Wrap filter drier with damp cloth 3 Braze filter drier to above 5 in 127 mm liquid tube 4 Connect and braze liquid refrigerant tube to the filter drier A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in unit damage or improper operation Installation of filter drier in liquid line is required Factory Supplied Muffler part LM10KK003 Installation is Required On Every Installation e A muffler is required to reduce noise transmitted to indoor through the line set e Muffler may be installed in the vertical or the horizontal di
47. y nitrogen and replace filter driers Evacuate to 500 microns prior to recharging Do not vent Puron refrigerant into the atmosphere Do not use capillary tube coils Observe all warnings cautions and bold text All indoor coils must be installed with a hard shutoff Puron refrigerant TXV metering device Copyright 2011 Carrier Corp 7310 W Morris St e Indianapolis IN 46231 Printed in U S A Edition Date 07 11 Catalog No 25VNA 3SI Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces 25VNA 2SI 18
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