Installation Manual
Contents
1. F E V 4 A B C NFOO2 0 19 CAP 30 i CNP 30 CNP 36 F E V 4 A B C N B F 003 i CAP 36 CNP 42 50 75 CAP 42 50 75 CSPH 36 75 CSPH 42 75 75 75 CNP 31 75 75 75 CNP 48 75 75 75 CSPH 48 75 75 1 00 CNP 37 i CNP 43 CAP 48 75 1 00 CNP 60 1 00 CSPH 60 i 1 00 F E V 4 A B C N B F 005 75 75 1 00 F E V 4 A B C NBOO6 1 00 2 2 1 00 CAP 60 i 2 2 1 00 CNP 61 i Comb not allowed No charge adjust for ID Catalog No II288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 13 Replaces IIl288B 04 Heating Check Chart 37 For use in Heating Charging Mode only Heating Check Chart 13 For use in Heating Charging Mode only Vapor Service Vapor Service Valve Pressure Valve Pressure Refrigerant Pressure K Refrigerant Pressure psig Refrigerant Pressure KPa gt a 2 5 D wn D 2 a p D D E D oz Outdoor Ambient Temperature F C Fig 30 Heating Pressure Check Chart 288BNV037 Heating Check Chart 240 25 Heating Check Chart 48 For use in Heating Charging Mode only For all AHRI listed indoor combinati2. Di De gt iW b TUE of X yA JB t d S e I ES x FELE EFTE CO Ty pE a MS Utility Relay A13414 Fig 41 Variable Speed Control Board with optional Utility Relay Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces Il288B 04 20 Table 7 Troubleshooting SERVICE FLASH RESET TIME AMBER LED DESCRIPTION CODE Minimum Amber LED Minutes Standby ON no flash Variable se aise 1 Variable 1 2 sec ON Speed longer pause Range Cutback 1 second OFF 5 230VAC Dropout ResetEvent _49 6 7 3 5 7 0 7 3 7 7 5 7 3 5 Compressor Inverter Overcurrent Lookout 69 15 VDC Under Voltage Lockout 96 2Hous High Torque Eventi a o High Torque Lockout 99 Hours Oooo O OF Short Flashes indicate the first digit in the status code followed by long flashes indicating the second digit of the status code 341475 101 REV A Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces II288B 04 21 FINAL CHECKS CARE AND MAINTENANCE IMPORTANT Before leaving job be sure to do the For continuing high performance and to minimize following possible equipment failure periodic maintenance must be 1 Ensure that all
3. SUCTION TUBE 3 ST 1 25 4 mm gt A MIN LIQUID TUBE SUSPENSION INSULATION OOO A07588 Fig 1 Connecting Tubing Installation The outdoor unit contains the correct amount of refrigerant charge for operation with AHRI rated indoor units 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 UT 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 288BNV applications The maximum allowable equivalent line set length is 100 ft 30 5 m IMPORTANT Always install the factory supplied liquid line filter drier Obtain replacement filter driers from your distributor or branch Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 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 listed in pre sale literature There can be no deviation Consult the Service Manual Air Condit
4. E C AND OR LOCAL CODES TERMINAL BLOCK p gt FIELD POWER wane T GROUND LUG A14028 Fig 5 Line Power Connections Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Connect to Evolution connections Only two wires AB to Evolution capable indoor unit furnace or fan coil are required Connect C if additional grounding is required see Fig 6 IMPORTANT This system requires the power supplied to the outdoor unit and the indoor unit for the UI to communicate with the outdoor unit Connect Control Wiring Non Communicating Six wires are required when connecting 288BNV models to non communicating 2 stage thermostats Use Fig 7 For required connections Unit is configured by factory for Evolution communicating control To wire unit for non communicating control disconnect the green A and yellow B wires from ABCD plug and connect appropriate wires to low voltage terminal block Use wire nuts to attach thermostat wire to LVCH harness 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 2 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
5. See accessory list for approved TXV t 240 unit height is 38 7 16 and 24B unit height is 31 5 8 Airflow Setup for Non communicating Furnaces For installations with non communicating furnaces set airflows to 350 400 cfm nominal ton in high stage and 70 80 percent of high stage airflow in low stage Step 9 Install Accessories No refrigeration circuit accessories are required or are available for installation within the unit External to the unit the same accessories such as support feet snow rack wind baffle etc available on other Bryant units can also be used on this line of product For models utilizing 23 inch x 23 inch base pans it is recommended to use 5 support feet in order to fully support unit See Fig 8 Refer to the individual Installation Instructions packaged with kits or accessories when installing A14008 Fig 8 Recommended Support Feet Location for 23 x 23 basepan Step 10 Start Up A CAUTION UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in minor personal injury equipment damage or improper operation 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 transducer or system safety devices such as discharge thermistor or the high pressure switch 4 Dome tempera
6. 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 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 between 80 100 ft 24 38 30 48 m capacity and performance losses can occur Follow the pipe sizing recommendations in the 288BNV Product data to manage these losses This unit shall not be installed with greater than 100 ft 30 48 m of equivalent line length Refer to Table 1 for field tubing diameters No additional accessories are required for line lengths between 80 100 ft 24 4 30 5 m on this product Table 1 Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters in LIQUID VAPORt UNIT SIZE Connection Tube Connection M
7. C Fig 29 Heating Pressure Check Chart 288BNV036 Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces II288B 04 14 Step 13 Pumpdown amp Evacuation A CAUTION ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage Federal regulations require that you do not vent refrigerant to the atmosphere Recover during system repair or final unit disposal If this system requires either a Pump Down or Evacuation for any reason the procedures below must be followed Pump Down Evolution Communicating Because this system is inverter controlled compressor suction pressure transducer and EXV conventional procedure cannot be used to pump down and isolate the refrigerant into the outdoor unit The UI User Interface has provisions to assist in performing this function 1 Connect gauges to 288BNV liquid and vapor service valve ports to monitor operating pressures during and at comple tion 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 t
8. 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 Furnace or Fan Coil User Interface UI C and D not required C connection optional Humidifier S gt Za N A11144 Fig 6 Evolution Furnace or Fan Coil Wiring with Communicating Variable Speed HP Catalog No 11288B 05 Replaces Il288B 04 Thermidistat Fan Coil Heat Pump RVS Cooling Heat Stage 3 Jumper Wire Required for 1Single Stage Heat Cool Stage 1 Y1 W2 f Ff Heat Cool Stage 2 ap Fan 24VAC Hot Heating 24VAC Hot Cooling om J1 Jumper on Control Board Dry Contact 1 3 DrvContaet2 L D2 I F 24VAC Common f F Humidify i Outdoor Air Temp a O a F Q O O om WY i S D O om Remote Room Sensor Sensor Thermidistat A14269 Heat Pump RVS Cooling E Heat Stage 3 furnace W W1 f ae Jumper Wire Required for Single Stage Heat Cool Stage 1 Y1 W2 f 55 5 Heat Cool Stage 2 E science i aes Lek 24VAC Hot Cooling Fan 24VAC Hot Heating J1 Jumper on Control Board Nee ew Dry Contact 1 aa Dry Contact2 D2 f 24VAC Common CesT 77 Humidity Humidifier Solenoid gt Outdoor Air Temp a Valve Remote Room Sensor x Outdoo
9. UI displays the operation mode and fault codes as specified in the troubleshooting section See Table 7 for codes and definitions The conventional thermostat inputs are designed to work with most indoor units See AHRI for approved combinations Connections are Y Y2 Y1 O R W and C Depending on thermostat and indoor unit the system will operate at 1 or 2 capacities in heating or cooling mode 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 accessed via the UI Upon a call for cooling through the UI or the Y1 and or Y2 connections in a non communicating system the Application Operation Control AOC board see Fig 33 will open the EXV to the fully open position For heating the AOC board will open the EXV to a preset position depending upon the conditions Based upon the indoor space demand and the outdoor conditions the UI will then request a compressor speed and outdoor fan motor speed If the conditions are correct for operation the control board will allow the requested operation to begin but if the control board determines that the conditions are not correct the board will decide what other operation nearing that condition is acceptable The inverter Motor Operational Control MOC then outputs the three phase PWM signal and frequency that gently ramps the compressor speed up to stage 2 and then will adjust to th
10. charge in heating mode When Heating Check Charge Method is selected the system will operate by running in stage 5 with appropriate outdoor fan speed and indoor airflow Upon completion of a countdown period for system stabilization check refrigerant pressures for the appropriate ambient temperatures shown in Fig 27 29 or 31 based the OD unit size To use the Heating Check Chart in non communicating systems operate system at Y1 Y2 high stage These charts indicate whether a correct relationship exists between system operating pressure and air 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 Table 3 Required Charge Adjustment for Indoor Coil Model Furnace or Fan Coil Model Number 13 24B 240 36 37 48 60 CNPV 18 CAP 18 CNP 24 CNPV 19 CAP 24 CSPH 24 CSPH 30
11. delay if there is a call for cooling or heat ing and HPS is reset the PEV opens for 150 seconds to equalize system pressures The compressor and fan will then ramp to the next lower stage of operation until demand is satisfied In the next call for heating cooling system will re sume normal operation 3 If the opened switch closes at any time after the 15 minute delay then the PEV opens for 150 seconds to equalize sys tem pressures The compressor and fan will then ramp to the next lower stage of operation until demand is satisfied In the next call for heating cooling system will resume normal operation 4 If HPS trips 3 consecutive cycles the unit operation is locked out for 4 hours 5 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 6 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 Brown Out Protection If the line voltage is less than 187V for at least 4 seconds the Compressor and OD fan goes to 0 rpm Compressor and fan operation are not allowed until voltage is a minimum o
12. 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 fire 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 A 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 glov
13. 18 480 Pg 175 t 9 7 i E 7 Loa 5 3 16 5 Lo 8 Be s S wm wa 15 5 t 8 6 15 L 83 65 70 75 80 85 90 95 100 105 36 C 39 C 42 C 44 C 47 C 50 C 53 C 56 C 58 C Outdoor Ambient Temperature F C Fig 25 Charging in Cooling Mode 288BNV060 Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces II288B 04 12 Heating Check Chart Procedure See Fig 27 31 Communicating Non communicating Systems In heating mode the required charging method is by weigh in On new installations or complete recharge refer to the unit 0 and indoor fan coil furnace coil per Table 3 for additional charge needed 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 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 Refrigerant Charging mode selected from the Installation and Service screen The Charging Mode Selection screen will show selections for Weigh In Charge Method or Heating Check Charge Method Select Heating Check Charge Method The Heating Check Charge method will only be displayed if the conditions are right for checking the
14. 288BNV EVOLUTION V VARIABLE SPEED HEAT PUMP WITH PURON REFRIGERANT Installation Instructions NOTE Read the entire instruction manual before starting the installation TABLE OF CONTENTS PAGE NO SAFETY CONSIDERATIONS ec ee ee tee eee e ete net een e eens 2 INSTALLATION RECOMMENDATIONS 0 0 ec errare eeen erae 2 INSTALLATION E a a E E R ee ety RE e a ee EOE DE EE E EEREN 3 Stp 1 Check Eguipmentand Job Sile seess tere draina aa E a a e aa e bee eee E EG 3 Step 2 Install on Solid Level Mounting Pad nee eee e eee e eens 3 Step 5 Clearance Requirements sss eiei a draco e Soni dare oo Seg Sree oo Sowa wee bee Sew oe dew ae ee EAA 3 Sten Oprane AMDI 245552 6444544 555556525 9556554555560585 544055 55655450528 644555405544 4 Steps Elevate Unit ceert eddie kie ia aa AE A Row Sie Seana Meee eddie Row Sie REE Mas AE des Raw ere See 4 Step 6 Makine Piping Connections 62 dcndccceddendiadedacddcoedeerdddeducigesedvecedeeduncaces 4 Step 7 Make Electrical Connections osese readens e kea deed aceale dee ee ea ede alee ae ee bea e aoe db aeateare 4 Step 8 Compressor Internal Crankcase Heater 0 eee eee e eee e nee eenees 8 Step 9 Install ACCESSONES sirsak uot bud ae Veteaw a dod Bae e ueteaw ae dee bane weteae se hee baw be ween 8 Olep 10 dO nee eee a ee ee eae ee eee ee Eee Cae he Se E E E 8 Step 11 System Functions and Sequence of Operation 0 eect eee eeenees 10 S
15. 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 Charging using the subcooling method optimizes charge volume and is preferred if possible If the outdoor temperature is between 65 F 100 F 18 3 C 37 8 C and indoor temperature is 70 F 80 F 21 1 C 26 7 C the option to further adjust charge using service valve subcool will be available in the charging mode selection screen If temperatures are outside of range this option will be greyed out and not selectable Initial start up can be performed using calculated charge only and once conditions are within range the Service Valve Subcool option will become selectable Once start is selected the system will operate in a preset mode until done is selected Wait for required stabilization time then check subcooling at service valve Adjust charge as required to meet target service valve subcooling shown on screen 1 degree If any adjustment is necessary add or remove the charge slowly no greater than 5 Ib per minute and allow system to operate for 25 minutes to stabilize before declaring a properly charged system charging mode selection weigh In 15 b 120z total charge service valve subcool A14573 Fig 16 Adjusting Charge Using Service Valve Subcool servic
16. 567 refrigerant charge charging cooling htg check charge pumpdown evacuation EXV position back A A14568 Fig 11 Select Charging Subcooling 3 If installed indoor unit is a furnace coil model should have been selected manually during the initial discovery process Press the text line set and vapor line to choose line set length and vapor line diameter After complete press next to advance to next screen The weigh in value is the total charge weight and includes refrigerant shipped in unit If weigh in text is selected the additional charge required is broken down into the line set adder and indoor coil size adder Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations refrigerant charging setup furnace coil CNP 31 lineset 5 ft vapor line 5 8 in A14569 line settings line set 5 ft oOo e ai cancel A14570 Fig 12 Select Line Set Length amp Vapor Line Diameter A CAUTION UNIT OPERATION HAZARD Failure to follow this caution may result in improper unit operation For new installations only Add additional refrigerant due to indoor coil line set and vapor line settings Outdoor unit is pre charged with weight of refrigerant shown on rating plate charging mode selection weigh in 15 lb 120z total charge service valve subcool A14571 Fig 13 Weigh In
17. ING TEMPERATURE C by adding or removing 0 6 oz ft 17 7 g m of 3 8 liquid line above a SANRGING NE COLNE NODE Sac Liquid Service Valve Subcooling For all AHRI listed indoor combinations or below 15ft 4 57 m respectively 20 For standard refrigerant line lengths 80ft 24 4 m or less allow system to operate in cooling mode at least 25 minutes If conditions are favorable check system charge by subcooling method If any adjustment is necessary adjust charge slowly and allow system to operate for 25 minutes to stabilize before declaring a properly charged system 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 15 5 length above or below 15ft 4 57 m and indoor fan coil furnace 15 coil per Table 4 Charge level should then be appropriate for the system to achieve rated capacity The charge level should then be checked at another time when the both indoor and outdoor temperatures are in a more favorable range CHARGING IN COOLING MODE 37 NOTE Ifthe line length is beyond 80ft 24 38 m or greater than 20ft 6 10 m vertical separation see Long line guideline for special charging requirement SUBCOOLING TEMPERATURE F SUBCOOLING TEMPERATURE C 65 70 75 80 85 90 95 100 105 110 115 36 C 39 42 C 44 C 47 C 50 C 53 C 56 C 58 C 61 C 64 C C Outdoor Ambient Tempe
18. Kohm C F TEMPERATURE RESISTANCE ohms 25 0 77 0 10 0 2 3 0 0 32 0 32 6 3 2 28 0 18 4 85 5 3 4 50Kohm 125 0 257 0 1 7 1 6 75 0 167 0 7 40 2 0 25 0 77 0 50 0 2 3 THERMISTOR CURVE 90 80 70 60 50 40 30 20 0 20 40 60 80 100 120 TEMPERATURE DEG F RESISTANCE KOHMS A91431 Fig 35 10K Thermistor Resistance Versus Temperature 50K THERMISTOR D on oO 400 N Ww UW no uv O O O e e O U O O a lt O Lu S 200 x a N Lu jag un O TEMPERATURE F A14022 Fig 36 50K 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 37 38 39 and 40 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 25 F gt 15 C cooler than the coil sensor the sensors are out of range
19. Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations e 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 gt 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 fail defrost will be initiated based on coil temperature and time If the OCT sensor should fail defrost will occur at each time interval during heating operation but will terminate after 2 minutes If there is a thermistor out of range error defrost will occur at each time interval during heating operation but will terminate after 2 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 defr
20. To save time the communicating controls offer a service tool feature By wiring the service tool into the AOC board and powering it with an external adapter the technician can have a wall control capable of running the system right at the outdoor unit To use a service tool connect the A and B communication bus wires from this second communicating control to the terminals marked A and B on the terminal strip located in the bottom left comer of the AOC board see Fig 34 But instead of connecting the wires on the service tool to the terminals marked C and D connect the C and D wires from the service tool to the 24 VAC and C on ST1 as shown in Fig 34 When the service tool is connected and powered up the communicating controls inside the home will go to sleep and let the service tool take control of the system In this manner the service technician can run the diagnostic checkouts right at the outdoor unit using the service tool After the checkouts are completed and it is no longer necessary to use the service tool remove it from the communicating controls and the indoor communicating controls will regain control in about two minutes Pressure Switch Protection The outdoor unit is equipped with high pressure switch If the control senses the opening of a high pressure switch open 600 5 psig close 470 10 psig 77 F it will respond as follows 1 Display the appropriate fault code see Table 7 2 After a 15 minute
21. Value 4 Add additional required charge for line set and indoor coil size then fully open liquid and vapor service valves If line set is less than 15 feet 4 57 m in length charge removal may be necessary and will be shown as a negative number on UI screen Factory Charge charge weigh in expected factory charge 2 Ib 0 oz gt add for line set _ 0 Ib 1202 Coil amp Lineset Additional Charge Required add for indoor coil DEE 1 ib 0 oz Fig 14 Additional Required Charge A14572 Catalog No I1288B 05 Replaces Il288B 04 Step 11 System Functions and Sequence of Operation The 288BNV models utilize either Evolution Connex Communicating User Interface UI or conventional HP thermostat When using UI controls a call for cooling will energize the outdoor fan and compressor to run at lowest cooling demand If this does not satisfy cooling demand the system will ramp up in stages until it satisfies the demand After coping with the higher demand the unit returns to lower capacity operation until the demand is satisfied or until an increase in demand When using a conventional thermostat the thermostat controls the staging of outdoor unit 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 The user interface
22. 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 Catalog No 11288B 05 Replaces Il288B 04 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 tub ing 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 12 If these installation recommendations were not followed gas pulsation may be transmitted through improperly mounted line sets In this case an external vapor line muf fler accessory part no LM10KKO003 is available to mini mize noise due to gas pulsations 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 the dwelling and in extreme cases tubing breakage INDOOR WALL F LIQUID TUBE Ucro TUBE THROUGH THE WALL ger OP HANGER STRAP AROUND SUCTION TUBE ONLY INSULATION
23. ax Rated Minimum Diameter Diameter Diameter Diameter Tube Diameter 13 24B 3 8 3 8 3 4 3 4 5 8 240 25 3 8 3 8 3 4 7 8 5 8 36 37 3 8 3 8 3 4 7 8 5 8 48 3 8 3 8 7 8 1 1 8 3 4 60 3 8 3 8 7 8 1 1 8 3 4 240 unit height is 38 7 16 24B unit height is 31 5 8 t 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 Catalog No II288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces Il288B 04 Outdoor Unit Connected to Factory Approved Indoor Unit Outdoor unit contains correct system refrigerant charge for operation with factory approved AHRI rated indoor units 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 3 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 ref
24. e demanded speed The gentle ramp up results in no locked rotor amps to the compressor motor The unit 0 for compressor LRA will be stamped N A not applicable During operation the AOC monitors itself and the compressor operation along with the system pressures and temperatures The MOC board monitors the temperature current and operational status of the compressor OD fan and the inverter itself During operation the compressor speed will be adjusted to meet the changes to the demand When the demand is satisfied the inverter will ramp down the compressor speed and stop The EXV will step down to the completely closed position When the compressor stops a 3 5 minute Time Guard period is activated which is followed by opening of the PEV valve for 150 seconds to equalize the refrigerant pressure difference between the high and low sides of the compressor Upon equalizing the refrigerant pressure and an additional 15 seconds of the Time Guard period the compressor will be ready for the next operational demand If there is a power cycle the Pressure Equalizer Valve PEV will open for 150 seconds before the compressor start up Opening the PEV valve returns the discharge gas directly back to the suction side of the compressor This is done in either cooling or heating mode so that the rotary compressor will start with a very low pressure differential The 3 5 minute Time Guard can be bypassed by momentarily shorting the Forced Defro
25. e valve subcool targetservice valve subcool 8 3 F A14574 Fig 17 Service Valve Subcool Target Value service valve subcoal please wait target service valve subcool 8 3 F stabilization time 0 42 mins mode stage speed cool Sstg 3201 rpm EX position 100 2 indoor airflow 800 cfm fad A done A14575 back Fig 18 Stabilization Time Catalog No I1288B 05 Replaces Il288B 04 Char in Non Communicatin S stems gid A E A E aise Srila 15 F Charging Procedure Force system to operate in high stage cooling by creating a large differential between room temperature and set point on thermostat Use multi meter to verify that 24 VAC is present between C Y1 Y2 terminals at outdoor unit t t p e Factory charge amount is shown on unit rating plate for high stage Target subcooling chart is provided on back of control box door see Fig 20 25 for example To properly check or adjust charge condition must be favorable for subcooling charging Favorable conditions exists when outdoor temperature is between 65 F 18 C and 100 F 38 C and the indoor temperature is between Gec o ec aac Wro eo eo BBC E 70 F 21 C and 80 F 27 C Follow the procedure below ibik ii Unit is factory charged for 15ft 4 57 m of lineset Adjust charge Fig 21 Charging in Cooling Mode 288BNV024B SUBCOOLING TEMPERATURE F SUBCOOL
26. eo eC CIOE ccc anc cance ne eae Geos oie ohn eee ees oie gah eonrn oes ene E EA 11 Step 13 Pumpdown amp EVdCualion 2 24622 4842446 084005044 bree Seed doe Seba reeetetares reverend 15 WEATOR C O NIV OINTING SS oxo ee eae wea ey tora Pegs rn cee eee ene eee aye eee 16 TROUBLESHOOTING erretore derenan caas seen te eee eet eeeta te E S weteeseeee ter eee aes EE 17 FINALCHEC KS on ses esc ier a ee Se Aa es E E ae he es a eee a eo ace ae eee 22 CARE AND MAINTENANCE 0 01 ce te eee eee teen eee e ete nate eee eeeeees 22 PURON REFRIGERANT QUICK REFERENCE GUIDE 0 0 0 0c eee ee 22 Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces II288B 04 IMPORTANT Effective January 1 2015 all split system and packaged air conditioners must be installed pursuant to applicable regional efficiency standards issued by the Department of Energy Information in these installation instructions pertains only to 288BNV 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
27. es when handling parts 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 A WARNING ELECTRICAL SHOCK HAZARD Failure to follow this 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 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Indoor Thermostat Control Options Model mR o Standard Control HP Thermostat 288BNV Yes Ves Requires model SYSTXBBECC01 SYSTXBBECWO01 or SYSTXBBECNO1 with version 11 software or newer Version 12 software or newer required for model size 13 Using standard HP thermostat limits functionality of system 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 co
28. f 190V The control will flash the appropriate fault code see Table 7 230V Line Power Disconnect Detection The control board senses the presence of absence of 230V through inverter feedback Voltage should present at all times when system is in service regardless if system is running or standby If there is no 230V at the inverter when the indoor unit is powered with a cooling or heating demand the appropriate fault code is displayed on UI communicating only see Table 7 If system is configured with conventional heat pump thermostat non communicating no fault code will be displayed on AOC board nor will any status LEDs be lit Use multimeter to check for the presence of 230V in this situation Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 17 Replaces Il288B 04 Temperature Thermistors Thermistors are electronic devices which sense temperature As the temperature increases the resistance decreases 10Kohm thermistors are used to sense outdoor air temperature OAT coil temperature OCT and the suction line temperature OST located between the reversing valve and the accumulator A 5OKohm thermistor is used to sense discharge temperature ODT Refer to Table 5 and Fig 35 and 36 for resistance values versus temperature Table 5 10K 50Kohm Resistance Values vs Temperature 10
29. g and cooling operation Variable Speed Compressor This unit contains a variable speed rotary compressor that has a wide operating range It operates on a variable 3 phase sine wave provided by the inverter This compressor can only be operated by the 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 Evolution Connex Control Service mode allows for manual opening and closing of the EXV for troubleshooting and pump down Field control Connections For communicating operation use the communication Evolution plug only Only two wires AB color are required If necessary connect C for additional grounding see Fig 6 If using standard 2 stage HP thermostat connect discrete inputs R C Y2 Y1 0 W for 2 stage control in heating and cooling modes 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 intellige
30. g mode is 115 F 46 1 C Compressor protections will prevent cooling mode operation below minimum ambient temperature range The system may operate in cooling up to 125 F 52 C 52C with significant reduced capacity cutback above 115 F 46 1 C Refer to Product Data Detailed Cooling Capacity table Low ambient cooling operation is not currently available The maximum heating operation ambient is 66 F 18 9 C Compressor protections will prevent starting below 10 F 12 2 C and operation below 2 F 16 7 C 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 Make Piping Connections A 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 all flow control devices including solenoid valves
31. he 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 between code repeating is 2 5 seconds with LED OFF Codes are easily read from user interface UI Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 19 Replaces Il288B 04 EXAMPLE 3 short flashes followed by 2 long flashes indicates a 32 code Table 7 shows this to be low pressure switch open Utility Interface With Evolution Connex Control The utility curtailment relay should be wired between the two UTIL connections on the control board for this Evolution e SH ZKBOCE06S gt ae 4c S 2013 03 03 4 7 EE p ns ae Eaa SR NG SA Het cera lt Vie 17 mS Eye 22 2 i C1OZ TED 770 74 rA MODE L r aje e 241 i q Sppvutis rem ite AE oS JER RI tel AA t ARR a Siiiitiiiiig Communicating System see Fig 41 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 status screen will display Curtailment Yes See UI installation instructions for setup details A lsa A TE S a W se
32. ioners 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 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 knockouts provided in unit base pan Refer to unit mounting pattern in Fig 2 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 constr
33. is present between C and Y1 and Y2 terminals at outdoor unit 3 Close the liquid service valve 4 The unit will continue to run until high or low pressure switches open Close vapor service valve once compressor shuts down 5 Remove power from indoor and heat pump unit prior to servicing unit 6 A quantity of charge will remain in isolated section of system dependent on ambient temperature and overall system charge This charge must be manually recovered A recovery system will be required to remove final quantity of refrigerant from indoor coil and line set Evacuation and recovery of refrigerant from 288BNV Because this system has an EXV for the heating expansion device additional steps may be taken to open the EXV for fastest refrigerant recovery and evacuation 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 gauges to 288BNV liquid and vapor service valve ports to monitor operating pressures during and at comple tion of the procedure Attach recovery system or vacuum pump to gauge set as needed for the service procedure The service valves must be open to evacuate the unit through the line set service ports The suction capillary service port is a direct connection to the suction port of the compres
34. ld 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 See 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 5 DISCONNECT PER N
35. ll default to 90 minutes at ambient above 37 degrees If using non communicating thermostat defrost intervals are set using dip switches on outdoor control board see Fig 15 AUTO defrosts adjusts the defrost interval time based on the last defrost time as follows e When defrost time lt 5 minutes the next defrost interval 90 minutes outdoor temperature above 37 F 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 Catalog No II1288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces Il288B 04 A14021 Fig 15 AOC Control Board 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 e 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 o
36. nnections shown on inverter cover A WARNING EXPLOSION HAZARD Failure to follow this warning could result in death serious personal injury and or property damage Never use air or gases containing oxygen for leak testing or operating refrigerant compressors Pressurized mixtures of air or gases containing oxygen can lead to an explosion 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 has limited serviceability Refer to Service Manual for details on field replaceable parts A replacement cover is provided with a replacement inverter 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 applications 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
37. notice and without obligations Replaces 11288B 04
38. ntly used by the AOC control board for low pressure cut out loss of charge management compressor protection oil circulation management lubrication management and EXV control Pressure Equalizer Valve PEV At the end of every compressor operation after the 3 5 minute Time Guard period the equalizer valve opens for 150 seconds plus an additional 15 seconds of protection before allowing the compressor to start ramping up The PEV is located next to the suction and discharge of the compressor The function of this valve is to prevent the compressor from starting with a high refrigerant pressure differential thus helping the reliability of the compressor NOTE A hissing sound may be heard during the equalization process This is normal Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces II288B 04 TROUBLESHOOTING Systems Communication Failure If communication is lost with the User Interface UI 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 4 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 inputted into
39. o begin the pump down 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 pump down is complete when the suction pressure drops below 10 psig Compressor protec tions are still active to prevent damage to the compressor or inverter high pressure high current high torque etc 7 Once system indicates pump down complete or failure to complete shutdown close vapor service valve 8 A small quantity of charge will remain in isolated section of system dependent on ambient temperature and overall sys tem charge This charge must be manually recovered A recovery system will be required to remove final quantity of refrigerant from indoor coil and line set 9 Remove power from indoor and heat pump unit prior to ser vicing unit Pump Down Using 2 stage HP Thermostat Non Communicating 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 1 Connect gauges to 288BNV liquid and vapor service valve ports to monitor operating pressures during and at completion of the procedure 2 Force system to operate in high stage by creating a large differential between room temperature and set point on thermostat Use multi meter to verify that 24 VAC
40. ons 456 For use in Heating Charging Mode only ji Vapor Service 2757 Vapor Service Valve Pressure Valve Pressure fey Se O UO l l 2413 2068 4 C 70 F 1D 2 EID eC 1724 1380 1034 Refrigerant Pressure KPa 690 Refrigerant Pressure psig Refrigerant Pressure KPa Refrigerant Pressure psig 345 10 20 30 50 60 12 C 7 C 1 C 4 C 10 C 16 C Outdoor Ambient Temperature F C Fig 31 Heating Pressure Check Chart 288BNV048 Heating Check Chart 24B Heating Check Chart 060 For use in Heating Charging Mode only For all AHRI listed indoor combinations For use in Heating Charging Mode only Vapor Service Vapor Service C Valve Pressure Valve Pressure goF ID 27 C 70 F ID 21 C SOF ID 16 C Refrigerant Pressure KPa Refrigerant Pressure psig Refrigerant Pressure psig Refrigerant Pressure KPa 30 40 50 19C 4 C 10 C 60 65 et pec Outdoor Ambient Temperature F C Fig 32 Heating Pressure Check Chart 288BNV060 Outdoor Ambient Temperature F C Fig 28 Heating Pressure Check Chart 288BNV024B Heating Check Chart 36 4d For use in Heating Charging Mode only For all AHRI listed indoor combinations sii Vapor Service 2757 Valve Pressure 2413 2068 1724 1380 1034 690 Refrigerant Pressure KPa Refrigerant Pressure psig 345 Outdoor Ambient Temperature F
41. or pressure equalization followed by 15 seconds of PEV Off period before the next compressor ON cycle This delay cannot be bypassed as it helps compressor reliability e 15 second delay at termination of defrost before the auxiliary heat is de energized e See Table 7 for other delay information Communication and Status Function Lights Evolution Connex Control Green Communications COMM Light A green LED COMM light on the outdoor board see Fig 15 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 The green LED will be turned off when using a standard 2 stage non communicating heat pump thermostat 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 Defrost This user interface UI offers 5 possible defrost interval times 30 60 and 90 minutes or AUTO The default is AUTO Defrost interval times 30 60 and 90 minutes or AUTO are selected by the Evolution Connex Control User Interface if using UI The 90 and 120 minute selection will default to 60 minutes at ambient below 37 degrees The 120 minute selection wi
42. orough evacuation Catalog No II288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces 11288B 04 15 MAJOR COMPONENTS Variable speed Control Board A13361 Fig 33 AOC Application Operational Control Board The AOC board is located in the lower right hand side of inverter tray It s functions include e Compressor speed control e Outdoor fan motor control e Reversing valve operation e Defrost operation e Crankcase heater operation e Pressure switch monitoring e Time Delays e Pressure Transducer measurements e PEV control pressure equalizer valve e Temperature measurements e EXV Electronic Expansion Valve 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 and fan motor to the demanded RPM The inverter is always powered with line voltage since no contactor is used The inverter changes the line voltage to DC volts and then recreates 3 phase sine waves that vary in frequency to drive the compressor and fan motor at the desired RPM NOTE The unit may be operated with an Evolution Connex Control or a standard 2 stage HP thermostat Evolution Connex Control will utilize 5 stages of heating and cooling while 2 stage HP thermostat will only allow 2 discrete stages of heatin
43. ost 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 38 for proper placement See Table 5 for proper resistances A14302 Fig 37 Outdoor Coil Thermistor OCT Attachment On Distributor Tube OAT Thermistor must be locked in place with spherical nib end facing towards the front of the control box A11142 Fig 38 OAT Thermistor Location Bottom of Control Box Catalog No I1288B 05 Replaces Il288B 04 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 39 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 A14023 Fig 39 Suction Thermistor OST Attachment On Suction Tube Discharge Thermistor ODT Discharge Thermistor is used for protection against over temperature of the compressor The ODT is located on the compressor discharge stub o
44. r Sensor i Sensor Fig 7 Low Voltage Wiring Non Communicating A14029 Catalog No II288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces 11288B 04 7 Step 8 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 Upon initial start up of unit status code 68 will be generated and system will operate at stage 2 for 11 minutes This operation is important to system reliability and cannot be bypassed Each time high voltage is removed and reapplied this behavior will be repeated 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 be intelligently energized as needed between operations even when the UI or thermostat and indoor unit is not installed as long as there is power to the outdoor unit Airflow Setup for Evolution Furnace or FE Fan Coil communicating This system can only be installed with Evolution capable indoor and Evolution Connex User Interface UI SYSTXBBECCO1 SYSTXBBECW01 or SYSTXBBECNO1 with version 11 software or newer Version 12 or newer software required on model size 13 When using an Evolution Connex User Interface airflow is a
45. rature F C J Fig 22 Charging in Cooling Mode 288BNV036 CHARGING IN COOLING MODE 13 Liquid Service Valve Subcooling 10 5 10 3 SUBCOOLING TEMPERATURE F 65 70 75 80 85 90 95 100 a fa 36 C 39 C 42 C 44 C 47 C 50 C 53 C 56 C m Outdoor Ambient Temperature F C 2 e e e e Fig 23 Charging in Cooling Mode 288BNV037 Q QO 7 a CHARGING IN COOLING MODE 48 K Da Liquid Service Valve Subcooling ae 65 70 75 80 85 90 95 100 105 36 C 39 C 42 C 44 C 47 C 50 C 53 C 56 C 58 C Outdoor Ambient Temperature F C CHARGING IN COOLING MODE 240 25 Liquid Service Valve Subcooling For all AHRI listed indoor combinations SUBCOOLING TEMPERATURE F SUBCOOLING TEMPERATURE C 11 5 65 70 75 80 85 9 95 100 105 110 115 36 C 39 C 42 C 44 C 47 C 50 C 53 C 56 C 58 C 61 C 64 C Outdoor Ambient Temperature F C SUBCOOLING TEMPERATURE F SUBCOOLING TEMPERATURE C Fig 24 Charging in Cooling Mode 288BNV048 CHARGING IN COOLING MODE 60 Liquid Service Valve Subcooling 7 80 85 90 9 100 10 20 1 11 1 42 C 44 C 47 C 50 C 53 C 56 C 58 C Outdoor Ambient Temperature F C 19 5 l l 10 8 19 10 6 li e e a e i i Fig 20 Charging in Cooling Mode 288BNV0240 025 u 185 me a
46. rigerant 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 A05227 Fig 3 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 u
47. sing 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 opening 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 4 5000 oe 4000 3500 ENN od a 5 3000 JP A O an 2000 1500 E VACUUM TIGHT TOO WET HoT TIGHT 500 DRY SYSTEM O 1 2 3 4 5 6 7 MINUTES A95424 Fig 4 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 Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces Il288B 04 Step 7 Make Electrical Connections A 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 fie
48. sor and may also be used 2 In the advanced menu of the UI go to Checkout gt Heat Pump 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 indicates 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 Evacuation and recovery of refrigerant from 288BNV when using non communicating thermostat Refrigerant recovery and evacuation can be performed without a UI User Interface but will take more time If EXV is not forced open the recovery and evacuation must rely on check valve as a bypass 1 Connect gauges to 288BNV liquid and vapor service valve ports to monitor operating pressures during and at completion of the procedure Attach recovery system or vacuum pump to gauge set as needed for the service procedure The service valves must be open to evacuate the unit through the line set service ports The suction capillary service port is a direct connection to the suction port of the compressor and may also be used 2 Begin evacuation or refrigerant Allow extra time for refrigerant recovery and establishing a th
49. st pins Only the 3 5 minute time delay can be bypassed Because it is important for compressor reliability the 150 second PEV delay cannot be bypassed 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 The compressor windings will occasionally be energized during the OFF cycle depending on the length of the OFF cycle to start the stator heat operation thus maintaining a sump temperature that is essential for compressor reliability The compressor will not run during this process Outdoor Fan Motor Operation The outdoor unit control Fig 15 energizes outdoor fan anytime the compressor is operating except for defrost The OD fan motor is variable speed The speed will change depending on the ambient temperature and the cooling or heating capacity required Time Delays The unit time delays include e 3 5 minute time delay after last cycle initial power up return from brown out condition To bypass this feature momentarily short and release Forced Defrost pins e At the end of every compressor ON cycle there will be 150 seconds of PEV open period f
50. tance at 70 F 20 F WINDING MODEL 288BNV 240 13 24B 25 36 37 48 60 Between 59 1 13 59 59 wor 24 terminals OHM OHM OHM OHM OHM OHM Between terminal amp gt 1 mega OHM ground 240 unit height is 38 7 16 and 24B unit height is 31 5 8 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 A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage and or improper operation To maintain water integrity of the compressor fusite terminal box the two holes in outer ring need to be full of RTV sealant Fan Motor If verification of proper operation is required for the fan motor used in this unit follow these steps 1 Disconnect fan motor connector from control board 2 Measure resistance between any 2 of the 3 leads present 3 Compare measurement to values below Fan Motor Resistance Unit Size Resistance Ohms 13 24B 21 2 240 25 36 37 48 60 11 1 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 t
51. the AOC 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 AOC 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 When installing heat pump with older fan coils a model plug change may be required See table 2 for fan coils requiring model plug change 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 the appropriate fault code temporarily Table 4 Factory Supplied Model Plug Information PIN D MODEL PLUG ohms 2B0BNV NUMBER l Pins 1 4 Pins 2 3 13 HK70EZ029 11K 220K 240 25 HK70EZ001 5 1K 11K 24B HK70EZ009 5 1K 91K 36 HK70EZ002 5 1K 18K 37 HK70EZ026 11K 120K 48 HK70EZ003 5 1K 24K 60 HK70EZ004 5 1K 33K 240 unit height is 38 7 16 and 24B unit height is 31 5 8 Service Tool A150062 Fig 34 Service Tool Connection When working on the outdoor unit of a split system the technician would usually need to repeatedly walk between the indoor wall control and the unit outside
52. tures may be hot 5 Discharge thermistor is engaged tight on the discharge tube A CAUTION PERSONAL INJURY HAZARD Failure to follow this caution may result in personal injury Wear safety glasses protective clothing and gloves when handling refrigerant A CAUTION ENVIRONMENTAL HAZARD Failure to follow this caution may result in environmental damage Federal regulations require that you do not vent refrigerant to the atmosphere Recover during system repair or final unit disposal Catalog No 11288B 05 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces IIl288B 04 Follow these steps to properly start up the system 1 After system is evacuated close the disconnects to energize indoor unit outdoor unit and User Interface UI Do not attempt to operate the system in heating or cooling mode at this time Mode OFF 2 Navigate to the service area by pressing MENU from main screen Scroll down to service icon and hold until icon turns green Once in the Installation and Service menu se lect Refrigerant Charging then select Charging Cooling aaa Aad d hea tsource photo u pload screen lock back ajo Fig 9 Service Icon A14566 installation amp service service information refrigerant charging software upgrade dealer logo upload back A Fig 10 Select Refrigerant Charging A14
53. uction 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 9 53 mm Dia Tie down Knockouts in Basepan 2 Places View From Top A05177 UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONS in mm Dimension in mm A B C 23 X 23 596 X 596 7 13 16 198 4 7 16 102 18 1 8 458 31 2 X 31 2 792 X 792 9 1 8 232 6 9 16 167 24 11 16 627 Fig 2 Tie down Knockout Locations Catalog No 11288B 05 Replaces Il288B 04 Step 4 Operating Ambient The minimum outdoor operating ambient in cooling mode is 40 F 4 4 C with Evolution Connex Control 55 F 12 8 C with non communicating systems The maximum outdoor operating ambient in coolin
54. ut see Fig 40 A14024 Fig 40 Discharge Thermistor ODT Variable Speed Compressor Winding Resistance This compressor operates with 3 phase variable frequency PWM variable voltage For troubleshooting certain fault codes related to compressor resistances follow these steps 1 Disconnect compressor power leads from the inverter MOC terminals U YEL V RED and W BLK 2 Measure the resistance between YEL to RED YEL to BLK and RED to BLK and compare to Table 6 values Each resistance set should be equal 3 Measure the resistance to ground for each lead 4 If the resistances check out reconnect power leads to appropriate terminal 5 If the resistances appear to be abnormal it will be necessary to measure the resistance at the compressor fusite terminals 6 During the removal of the compressor fusite cap do not re move the RTV sealant Remove the harness plug measure the resistances and compare to Table 6 7 Special care will need to be taken with the replacement of the compressor fusite cap Make sure the two holes in the compressor fusite terminal box are still full of RTV sealant before the cap is reinstalled The factory RTV can be reused as long as none of it has been removed during the cap removal 8 Reinstall compressor sound blanket making sure discharge thermistor and compressor power harness are routed as they were from the factory Table 6 Variable Speed Compressor Resistance winding resis
55. utdoor ambient temperature The defrost cycle is terminated as described below e When OAT is gt 25 F 3 89 C defrost terminates if outdoor coil temperature OCT gt 60 F 15 6 C And a minimum of 2 minutes defrost length e When OAT 25 F 4 3 89 C defrost will terminate if OCT is gt 45 F 4 4 C and a minimum of 2 minutes defrost length e Or 10 minutes has passed At the defrost termination the outdoor fan will turn on 10 seconds before the reversing valve switching NOTE Compressor speed during defrost will go to defrost speed Step 12 Check Charge Charge in CHARGING mode communicating only Unit is factory charged for 15ft 4 57 m of lineset If any refrigerant charge adjustment is required due to the user inputted line set length or indoor coil the UI will calculate and display the target subcooling and the amount of additional charge to be added Therefore the 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 Perform a final charge check only when in cooling and OD is between 65 F 18 C and 100 F 38 C Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 11 The use of a commercial charge metering device restrictor such as Imperial liquid low side charger model
56. utomatically 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 Airflow Setup for Non communicating Fan Coil The system can be installed with a standard 2 stage heat pump thermostat and FV4C fan coil without additional accessories Select appropriate unit size on fan coil Easy select board For replacement applications with older FV4 A B FK4 and 40FK fan coils the model plug in the outdoor unit must be changed per Table 2 below The model plug adjusts compressor speed to match available low stage indoor airflow NOTE 288BNV013 is AHRI rated with communicating indoor units only due to low stage airflow requirements Table 2 Alternate Model Plug FV4 A B FK4 40FK Fan Coil Models Requires outdoor model plug change Factory Required Accessory 288BNV Model Plug Model Plug HK70EZ HK70EZ 24Bt 009 015 240T 25 001 016 36 002 017 48 003 018 60 004 019 FK4 and 40FK also require a TXV change
57. 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 User s 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 cylinders 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 e Manifold sets should be 700 psig high side and 180 psig low side with 550 psig low side retard e Use hoses with 700 psig service pressure rating e Leak detectors should be designed to detect HFC refrigerant e Puron refrigerant as with other HFCs is onl
58. y compatible with POE oils e Vacuum pumps will not remove moisture from oil e Do not use liquid line filter driers with rated working pressures less than 600 psig e 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 e POE oils absorb moisture rapidly Do not expose oil to atmosphere e POE oils may cause damage to certain plastics and roofing materials e Wrap all filter driers and service valves with wet cloth when brazing e A factory approved liquid line filter drier is required on every unit e Do NOT use an R 22 TXV e 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 e Never open system to atmosphere while it is under a vacuum e When system must be opened for service recover refrigerant evacuate then break vacuum with dry nitrogen and replace filter driers Evacuate to 500 microns prior to recharging e Do not vent Puron refrigerant into the atmosphere e Do not use capillary tube coils e Observe all warnings cautions and bold text e All indoor coils must be installed with a hard shutoff Puron refrigerant TX V metering device Bryant Heating amp Cooling Systems e 7310 W Morris St e Indianapolis IN 46231 Edition Date 03 15 Catalog No 1I288B 05 Manufacturer reserves the right to change at any time specifications and designs without
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