Bryant 187B Air Conditioner User Manual
Contents
1. Fig 8 Outdoor Air Thermistor OAT Attachment OCT Thermistor must be secured tight on the liquid tube Fig 9 Outdoor Coil Thermistor OCT Attachment Table 6 TROUBLESHOOTING AMBER OPERATION FAULT ERSA POSSIBLE CAUSE AND ACTION CODE On sol Staridby nosal forunit op None id no Normal operation eration flash cee Cool Heat Opera None 1 pause Normal operation fore Sony Hest Opera None 2 pause Normal operation System Communications 16 Communication with user interface lost Check wiring to User Interface indoor Failure and outdoor units Control does not detect a model plug or detects an invalid model plug Unit Invalid Model Plug 25 will not operate without correct model plug A High pressure switch trip Check refrigerant charge outdoor fan operation High Pressure Switch Open 31 and coils for airflow restrictions Low Pressure Switch Open 32 Low pressure switch trip Check refrigerant charge and indoor air flow Control Fault 45 Outdoor unit control board has failed Control board needs to be replaced Line voltage lt 187v for at least 4 seconds Compressor and fan operation not Brown Out 230 v ae allowed until voltage gt 190v Verify line voltage There is no 230v at the contactor when indoor unit is powered and cooling No 230v at Unit 47 heating demand exists Verify the disconnect is closed and 230v wiring is2. The unloader is the compressor internal mechanism controlled by the DC solenoid that modulates between high and low stage If it is suspected that the unloader is not working the following methods may be used to verify operation 1 Operate the system and measure compressor amperage Cycle the unloader on and off at 30 second plus intervals at the UI from low to high stage and back to low stage Wait 5 seconds after staging to high before taking a reading The compressor amperage should go up or down at least 20 per cent 2 If step one does not give the expected results remove the solenoid plug from the compressor and with the unit run ning and the UI or Thermostat calling for high stage test the voltage output at the plug with a DC voltmeter The reading should be 24 volts DC 3 If the correct DC voltage is at the control circuit molded plug measure the compressor unloader coil resistance The resistance should be 32 to 60 ohms depending on com pressor temperature If the coil resistance is infinite much lower than 32 ohms or is grounded the compressor must be replaced MAJOR COMPONENTS 2 Stage Control The 2 stage control board controls the following functions Compressor high and low stage operation Outdoor fan motor operation Low ambient cooling Compressor external protection Pressure switch monitoring Time delays Field Connections On models with non communicating non Evolution syst
3. A tight dry system will hold a vacuum of 1000 microns after approximately 7 minutes See Fig 4 LEAK IN 3500 SYSTEM 3000 O T 2500 o 2000 VACUUM TIGHT hae TOO WET TIGHT DRY SYSTEM 0 12 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 or wires Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight Make Electrical Connections 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 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
4. The furnace control board allows the installing technician to select the proper airflows for each stage of cooling Below is a summary of required adjustments See furnace installation instructions for more details 1 Turn SW1 5 ON for 400 CFM ton airflow or OFF for 350 CFM ton airflow Factory default is OFF 2 The A C DIP switch setting determines airflow during high stage cooling operation Select the A C DIP switch setting corresponding to the available airflow shown in the furnace Installation Instructions that most closely matches the re quired airflow shown in the air conditioning Product Data for HIGH speed 3 The CF DIP switch setting determines airflow during low stage cooling operation Select the CF DIP switch setting corresponding to the available airflow shown in the furnace installation instructions that most closely matches the re quired airflow shown in the air conditioning Product Data for LOW speed If a higher or lower continuous fan speed is desired the continuous fan speed can be changed using the fan switch on the thermostat Refer to the furnace Installa tion Instructions for details of how to use this feature Airflow Selection for FV4C Fan Coils non com municating The FV4 provides high and low stage blower operation to match the capacities of the compressor at high and low stage To select recommended airflow refer to the FV4C Installation Instructions The FV4C utilizes an Easy Select control bo
5. see Table 6 230 V Brown Out Protection Defeated The brownout feature can be defeated if needed for severe noisy power conditions This defeat should always be a last resort to solving the problem Defeat is available on the User Interface setup screen available with SYSTXBBUIDO1 C UI or can be initiated through the forced defrost pins for non communicating systems as follows The brownout toggle is accomplished by shorting the defrost pins from power up with the OAT and OCT sensor connector removed After 3 seconds the status of the force defrost short and the OAT OCT as open will be checked If correct then the brownout will be toggled e Status code 6 shows the brownout is disabled e Status code 5 shows the brownout is active After the brownout defeat is set power down and reinstall the OAT OCT sensor and remove the short from the forced defrost pins As long as the short on the forced defrost remains the OAT and OCT faults will not be cleared The code will continue to be flashed The control is shipped with the brownout active The change in status is remembered until toggled to a new status A power down power up sequence will not reset the status It may be necessary to do the toggle twice to cycle to the desired state of the defeat 230V Line Power Disconnect Detection If there is no 230v at the compressor contactor s when the indoor unit is powered and cooling demand exists the appropriate error code is disp
6. connected to the unit Outdoor Air Temp Sensor Outdoor air sensor not reading or out of range Ohm out sensor and check F 53 iri ault wiring Outdoor Coil Sensor Fault 55 Coil sensor not reading or out of range Ohm out sensor and check wiring Thermistors out of ran 56 Improper relationship between coil sensor and outdoor air sensor Ohm out ernn N ge sensors and check wiring Compressor operation detected then disappears while low stage demand Low stage Thermal Cutout 71 exists Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long if installed Compressor operation detected then disappears while high stage demand High stage Thermal Cutout 72 exists Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long if installed Compressor voltage sensed when no demand for compressor operation Contactor Shorted E exists Contactor may be stuck closed or there is a wiring error Compressor voltage not sensed when compressor should be starting Contac No 2 2 0 ah Compiassor a tor may be stuck open or there is a wiring error Thermal cutout occurs in three consecutive low high stage cycles Low stage Termall Lockout sd low stage locked out for 4 hours or until 24v power recycled High stage Thermal Lock 82 Thermal cutout occurs in three consecutive high low stage cycles out high stage locked out for 4 hours or until 24v power recycled Low
7. cooling operation Tap selections on the furnace control board enable the installing technician to select the proper airflows for each stage of cooling Below is a brief summary of the furnace airflow configurations 1 The Y2 call for high stage cooling energizes the Cool tap on the control board The grey wire from cool tap is connec ted to tap 5 on the motor Refer to the furnace Product Data to find the corresponding airflow If the airflow setting for high cooling needs to be switched from tap 5 to a different tap jumper a connection from the cool tap to the desired tap so that the Y2 signal is communicated via the cool tap to the desired speed tap 2 The Y1 call for low stage cooling energizes the Fan tap on the control board The red wire from the fan tap is con nected to tap 1 on the motor Refer to the furnace Product Data to find the corresponding airflow If the airflow setting for low cooling needs to be switched from tap 1 to a differ ent tap jumper a connection from the Fan tap to the desired tap so that the Y1 signal is communicated via the Fan tap to the desired speed tap The Y1 setting will also govern the continuous fan airflow for the furnace Refer to the literature for the furnace for further details Airflow Selection for Variable Speed Furnaces non communicating The variable speed furnaces provide blower operation to match the capacities of the compressor during high and low stage cooling operation
8. is lost with the user interface the control will flash the appropriate fault code See Table 6 Check the wiring to the User Interface indoor and outdoor units Model Plug Each control board contains a model plug The correct model plug must be installed for or the system to operate properly see Table 5 Table 5 Model Plug Model Model Plug Oe a Number Number Pint 4 Pin2 3 187B024 Hk70EZ040 18K 75K 187B036 Hk70EZ042 18K 120K 180B036 Hk70EZO011 5 1K 150K 187B048 Hk70EZ044 18K 180K 187B060 Hk70EZ046 18K 270K 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 the appropriate fault code temporarily Pressure Switch Protection The outdoor unit is equipped
9. pressure switch trip has occurred during 3 consecutive cycles Unit oper Low Pressure Lockout 83 ation locked out for 4 hours or until 24v power recycled High Pressure Lockout 84 High pressure switch trip has occurred during 3 consecutive cycles Unit oper ation locked out for 4 hours or until 24v power recycled Sequence Compressor contactor is de energized and outdoor fan is energized for up to 15 minutes If demand still exists control will energize compressor 11 a Oo T ki faa N T a Oo T fea N T Thermidistat RVS Heat Stage 2 Heat Stage 1 Compressor Low Compressor High Fan 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Humidify Outdoor Air Temp Remote Room Sensor OAT RRS Return SRTN ol S N T g J H gt 1 Variable Speed Fan Coil Two Stage Air Conditioner oO if l 44m1 i l JJy1b JUMPER FOI 7 7W2 HEAT STAGING Ll np gt REMOVE J2 R Y2 a F TJ REMOVE J1 MODES f DEHUMIDIFY FOR Outdoor Sensor See Humidifier Instructions for proper wiring 7 Remote Room Sensor i A09566 Thermidistat Models T6 PRH01 A amp T6 NRH01 A w VS Fan Coil amp 2 Stage Air C
10. 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 E C AND OR LOCAL CODES CONTACTOR FIELD POWER O ne ee A Gy A91056 Fig 5 Line Connections Connect Control Wirin This unit is capable of communication with an Evolution Control or will operate using standard 24v 2 stage thermostat Route 24 v control wires through control wiring grommet and connect leads to control board When an Evolution User Interface is available connect A B C and D connections only If a 2 stage thermostat is used connect to the R C Y1 and Y2 connections Refer to the wiring label to further clarification Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more than 100 ft 30 48 m from unit as measured along the control voltage wires use No 16 AWG color coded wire to avoid excessive voltage drop All wiring must be NEC Class 1 an
11. 187B 2 5 TONS 180B 3 TON TROPHY EVOLUTION SERIES 2 STAGE AIR CONDITIONER WITH PURON REFRIGERANT Installation Instructions 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 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 seriou
12. 37 78 C and the indoor temperature is between 70 F and 80 F 21 11 C and 26 67 C Follow the procedure below Unit is factory charged for 15ft 4 57 m of lineset Adjust charge by adding or removing 0 6 0z ft of 3 8 liquid line above or below 15ft 4 57 m respectively For standard refrigerant line lengths 80 ft 24 38 m or less allow system to operate in cooling mode at least 15 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 15 minutes to stabilize before declaring a properly charged system 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 temperature 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 NOTE If line length is beyond 80 ft 24 38 m or greater than 20 ft 6 10 m vertical separation See Long Line Guideline for special charging
13. Piping Connections A WARNING PERSONAL INJURY AND ENVIRONMENTAL 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 Federal regulations require that you do not vent refrigerant to the atmosphere Recover during system repair or final unit disposal 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 more than 36 in 3 8 in 9 53 mm Dia Tiedown Knockouts in Basepan 2 Places i i Jz E lS I o we NX p ai Dg Me View From Top UNIT BASE PAN TIEDOWN KNOCKOUT LOCATIONS in mm Dimension in mm A B C 31 1 2 X 31 1 2 800 X 800 9 1 8 231 8 6 9 16 166 7 24 11 16 627 1 35 X 35 9 1 8 231 8 6 9 16 166 7 28 7 16 722 3 889 X 889 A05177 Fig 2 Tiedown Knockout Locations Outdoor units may be connected to indoor section using accessory tubing package or f
14. R CONDITIONER See Humidifier Instructions for proper wiring A09568 2 Stage Thermostat with Single Stage Furnace and 2 Stage Air Conditioner Fig 11 VS Furnace or Fan Coil Wiring with Communicating 2 Stage AC User Interface See Humidifier Instructions for proper wiring Fan Coil Communicating AC HP A09569 Fig 12 Evolution Furnace or Fan Coil with Communicating 2 Stage AC Wiring Diagram See Thermostat Installation Instruction for specific unit combinations 12 PURON R 410A REFRIGERANT QUICK REFERENCE GUIDE e 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 e Puron refrigerant cylinders are rose colored e Recovery cylinder service pressure rating must be 400 psig DOT 4BA400 or DOT BW400 e 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 only compatible with POE oils e Vacuum pumps will not remove moisture from oil e Do not use liquid line filter driers with rated work
15. ard that allows the installing technician to select proper airflows This fan coil has an adjustable blower off delay factory set at 90 sec for high and low stage blower operation When 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 Start Up A CAUTION UNIT OPERATION AND SAFETY HAZARD Failure to follow this caution may result in personal injury equipment damage or improper operation e Do not overcharge system with refrigerant e Do not operate unit in a vacuum or at negative pressure e Compressor dome temperatures may be hot 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 and observe the following e Front seating service valves are equipped with Schrader valves SYSTEM FUNCTIONS AND SEQUENCE OF OPERATION The 180B 187B models utilize either an Evolution Communicating User Interface or a 2 stage cooling indoor thermostat With a call for first stage cooling the outdoor fan and low stage compressor are energized If low stage cannot satisfy cooling demand high stage is energized by the second stage of indoor thermostat After second stage is satisfied the unit returns to low stage operation until first stage is satisfi
16. coil temp is less than outdoor air temperature 3 F 1 67 C or outdoor fan has been ON for 30 minutes Fan is turned off to allow refrigerant system to stabilize Fan is ON when outdoor coil temp is more than outdoor air temperature 25 F 13 89 C or outdoor coil temp is more than 80 F 26 67 C or if outdoor fan has been OFF for 30 minutes Fan is turned on to allow refrigerant system to stabilize Low pressure switch is ignored for first 3 minutes during low ambient start up After 3 minutes if LPS trips then outdoor fan motor is turned off for 10 minutes with the compressor running If LPS closes 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 LPS does not close within 10 minutes then the normal LPS trip response shut down cooling operation and generate LPS trip error will occur The PWM output for both high and low stage equals the value for low stage operation below 55 F 12 8 C Check Charge Models 180B 187B should be charged in high stage compressor operation Factory charge amount and desired subcooling are shown on unit rating plate Charging method is shown on information plate inside unit To properly check or adjust charge conditions must be favorable for subcooling charging Favorable conditions exist when the outdoor temperature is between 70 F and 100 F 21 11 C and
17. d must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory transformer for control power 24v 40va minimum NOTE Use of available 24v accessories may exceed the minimum 40va power requirement Determine total transformer loading and increase the transformer capacity or split the load with an accessory transformer as required 4 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 Compressor Crankcase Heater When equipped with a crankcase heater furnish power to heater a minimum of 24 hr before starting unit To furnish power to heater only set thermostat to OFF and close electrical disconnect to outdoor unit A crankcase heater is required if refrigerant tubing is longer than 80 ft 24 38 m Refer to the Application Guideline and Service Manual Longline Section Residential Split System Air Conditioners and Heat Pumps Airflow Setup for Evolution Control Furnace or FE Fan Coil communicating When using an Evolution User Interface airflow is automatically selected based on equipment size See User Interface Installation Instructions for available adjustments Airflow Selections ECM Furnaces non commu nicating The ECM Furnaces provide blower operation to match the capacities of the compressor during high and low stage
18. d 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 a oO T ey a N T Refer to Fig 3 and install filter drier as follows 1 Braze 5 in 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 Flow arrow must point towards indoor coil 4 Connect and braze liquid refrigerant tube to the filter drier A05178 Fig 3 Liquid Line Filter Drier 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 triple evacuation procedure in service manual Always break a vacuum with dry nitrogen Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage 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
19. ed Standard with Evolution Control Winter Start Control Low Ambient not allowed with No No non communicating thermostat For tubing set lengths between 80 and 200 ft 24 38 and 60 96 m horizontal or 35 ft 10 7 m vertical differential total equivalent length refer to the Long m Line Guideline Air Conditioners and Heat Pumps using Puron Refrigerant o t Required on all indoor units Standard on all new Puron refrigerant fan coils and furnace coils a Outdoor Unit Connected to Factory Approved Indoor Table 2 Refrigerant Connections and Recommended Liquid 5 Unit and Vapor Tube Diameters In T Outdoor unit contains correct system refrigerant charge for LIQUID RATED VAPORS operation with factory approved AHRI rated indoor unit when UNIT SIZE x Me Tiss Connection Tube connected by 15 ft 4 57 m of field supplied or factory accessory Diameter Diameter Diameter tubing and factory supplied filter drier Check refrigerant charge B a s4 for maximum efficiency 048 an 718 ei NOTE If the indoor furnace coil width is more than the furnace 060 3 8 7 8 1 1 8 casing width refer to the indoor coil Installation Instructions for transition requirements A WARNING Units are rated with 25 ft 7 6 m of lineset See Product Data sheet for performance data when using different size and length linesets Notes 1 Do not apply capillary tube or fixed orifice indoor coils to these units 2 For Tubing Set lengths betw
20. ed or until second stage is required again When both first stage and second stage cooling are satisfied the compressor will shut off When a 2 stage unit is operating at low stage system vapor suction pressure will be higher than a standard single stage system or high stage operation When the outdoor ambient is more than 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 a Oo T bs a N T a Oo faa N T Communication and Status Function Lights For Evolution Control Only Green communications COMM Light Green LED COMM Light A green LED COMM light on the outdoor board see Fig 6 indicates successful communication with the other system products The green LED will remain OFF until communications 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 An amber colored STATUS light is used to display the operation mode and fault codes as specified in the troubleshooting section See Table 6 for codes and definitions NOTE Only one code will be displayed on the outdoor unit control board the most recent with the highest priority Utility Interface with Evolution Control The utility curtailmen
21. een 80 and 200 ft 24 38 and 60 96 m horizontal or 35 ft 10 7 m vertical differential 250 ft 76 2 m Total Equivalent Length refer to the Residential Piping and Longline Guide line Air Conditioners and Heat Pumps using Puron refrigerant 3 For alternate liquid line options on 18 42 size units see Product Data or Residential Piping and Application Guideline Install Liquid Line Filter Drier Indoor A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation 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 Refrigerant Tubing Connection Outdoor Connect vapor and liquid tubes to fittings on vapor and liquid service valves see Table 2 Use refrigerant grade tubing Sweat Connection A CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation 1 Installation of filter drier in liquid line is required 2 Filter drier must be wrapped in a heat sinking material such as a wet cloth while brazing Service valves must be wrapped in a heat sinking material such as a wet cloth while brazing Use refrigeration grade tubing Service valves are closed from factory an
22. em the 2 stage control receives 24vac low voltage control system inputs through the R C Y1 and Y2 connections located at the bottom of the control board see Fig 6 The OD units can be controlled using a standard 2 stage thermostat or Evolution User Interface 2 Stage Compressor The 2 stage compressor contains motor windings that provide 2 pole 3500 RPM operation Refer to Table 4 for correct winding resistance Compressor Internal Relief The compressor is protected by an internal pressure relief IPR which relieves discharge gas into compressor shell when differential between suction and discharge pressures exceeds 550 625 psi The compressor is also protected by an internal overload attached to motor windings Compressor Control Contactor The contactor has a 24 volt coil The electronic control board controls the operation of the appropriate contactor TEMPERATURE THERMISTORS Thermistors are electronic devices which sense temperature As the temperature increases the resistance decreases Thermistors are used to sense outdoor ambient OAT and coil temperature OCT Refer to Fig 7 for resistance values versus temperature If the outdoor ambient or coil thermistor should fail the control will flash the appropriate fault code see Table 6 IMPORTANT Outdoor air thermistor and coil thermistor are factory mounted in the final locations Check to insure thermistors are mounted properly per Fig 8 and Fig 9 Thermis
23. iding un necessary turns and bends 4 Leave some slack between structure and unit to absorb vi bration 5 When passing refrigerant tubes through the wall seal open ing with RTV or other pliable silicon based caulk See Fig 1 6 Avoid direct tubing contact with water pipes duct work floor joists wall studs floors and walls 7 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 8 Ensure that tubing insulation is pliable and completely sur rounds vapor tube 9 When necessary use hanger straps which are 1 in 25 4 mm wide and conform to shape of tubing insulation See Fig 1 10 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation NOTE Avoid contact between tubing and structure OUTDOOR ere wall seg CAULK N LIQUID TUBE INSULATION WZ THROUGH THE WALL ae JOIST HANGER STRAP AROUND VAPORTUBE ONLY N INSULATION 3 a VAPOR TUBE fo e a ee Brees min MIN LIQUID TUBE SUSPENSION er TUBE A94026 Fig 1 Piping Installation a Oo fea N T The outdoor unit contains system refrigerant charge for operation with AHRI rated indoor unit when connected by 15 ft 4 57 m of field supplied or factory accessory tubing For proper unit operation check refrigerant charge using charging informa
24. ield supplied refrigerant grade tubing of correct size and condition Rated tubing diameters shown in Table 2 are recommended up to 80 ft 24 38 m See Product Data for acceptable alternate vapor diameters and associated capacity losses For tubing requirements beyond 80 ft 24 38 m substantial capacity and performance losses can occur Following the recommendations in the Residential Piping and Longline Guideline will reduce these losses Refer to Table 2 for field tubing diameters Refer to Table 1 for accessory requirements There are no buried line applications greater than 36 in 914 4 mm allowed If refrigerant tubes or indoor coil are exposed to atmosphere they must be evacuated to 500 microns to eliminate contamination and moisture in the system Table 1 Accessory Usage REQUIRED FOR ACCESSORY LOW AMBIENT COOLING REQUIRED FOR LONG LINE Bee eee APPLICATIONS APPLICATIONS Within 2 miles 3 22 km Below 55 F 12 8 C Compressor Start Assist Kit No Yes No Crankcase Heater Standard Standard Standard Standard with Evolution Control Evaporator Freeze Protection Low Ambient not allowed with No No non communicating thermostat Liquid Line Solenoid Valve No No No Standard with Evolution Control Low Ambient Control Low ambient not allowed with No No non communicating thermostat Puron i At bag Port Hard vest Vest Yest Support Feet Recommended No Recommend
25. ing pressures less than 600 psig e Do not leave Puron 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 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 a oO T k a N eo T 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 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 TXV metering device 13 a So n faa N qa 2010 Bryant Heating amp Cooling Systems 7310 W Morris St Indianapolis IN 46231 Printed in U S A Edition Date 02 10 Catalog No I1180 187B 01 Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Rep
26. it and minimize transmission of vibration to building Consult local codes governing rooftop applications Roof mounted units exposed to winds may require wind baffles Consult the Application Guideline and Service Manual Residential Split System Air Conditioners and Heat Pumps for wind baffle construction NOTE Unit must be level to within 2 3 8 in ft 9 5 mm m per compressor manufacturer specifications 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 Operating Ambient The minimum outdoor operating ambient in cooling mode is 55 F 12 78 C without low ambient cooling enabled in the Evolution Control and the maximum outdoor operating ambient in cooling mode is 125 F 51 67 C At line voltage of 208v or below and outdoor ambient of 120 F 48 9 C and above the compressor operates in low stage NOTE This product is approved for low ambient cooling if used with a communicating User Interface Make
27. laces New 14
28. layed see Table 6 Verify that the disconnect is closed and 230v wiring is connected to the unit Compressor Voltage Sensing The control board input terminals labeled VS and L2 see Fig 6 are used to detect compressor voltage status and alert the user of potential problems The control continuously monitors the high voltage on the run capacitor of the compressor motor Voltage should be present any time the compressor contactor is energized and voltage should not be present when the contactor is de energized Contactor Shorted Detection If there is compressor voltage sensed when there is no demand for compressor operation the contactor may be stuck closed or there is a wiring error The control will flash the appropriate fault code Compressor Thermal Cutout If the control senses the compressor voltage after start up and is then absent for 10 consecutive seconds while cooling demand exists the thermal protector is open The control de energizes the compressor contactor for 15 minutes but continues to operate the outdoor fan The control Status LED will flash the appropriate code shown in Table 6 After 15 minutes with a call for low or high stage cooling the compressor contactor is energized If the thermal protector has not reset the outdoor fan is turned off If the call for cooling continues the control will energize the compressor contactor every 15 minutes If the thermal protector closes at the next 15 minute inter
29. nd VS VR L2 Li ODF CCH OT EEO CET Pe I Pwo2 es z O O 90 i z O SR O l aig OO dt a e O ABCD at O P UTILITY RELAY e UTILITY SIGNAL lt _ OPEN RELAY al SUPPLIED BY UTILITY PROVIDER o WW Po UF thn PWMi jPwm2 LPs el O gt IO 00 i Q s O z MSEE OO EE Le an z m MODEL PLUG Liquid Line Solenoid A06526 Fig 6 2 Stage Control Board Evolution Controlled Low Ambient Cooling This unit is capable of low ambient cooling down to 0 F 17 78 C without a kit ONLY when using Evolution control A low ambient kit is not required and the outdoor fan motor does not need to be replaced for Evolution controlled low ambient operation The Evolution Control provides an automatic evaporator coil freeze protection algorithm that eliminates the need for an evaporator freeze thermostat Low ambient cooling must be enabled in the User Interface set up Fan may not begin to cycle until about 40 F 4 4 C OAT Fan will cycle based on coil and outdoor air temperature Evolution controlled low ambient mode operates as follows Fan is OFF when outdoor
30. noid is not energized and 100 capacity when the solenoid is energized The loading and unloading of the two step scroll is done on the fly without shutting off the motor between steps NOTE 67 compressor capacity translates to approximately 75 cooling capacity at the indoor coil The compressor will always start unloaded and stay unloaded for five seconds even when the thermostat is calling for high stage capacity Crankcase Heater Operation The crankcase heater is energized during off cycle below 65 F 18 33 C Outdoor Fan Motor Operation The outdoor unit control energizes the outdoor fan any time the compressor is operating except for low ambient cooling operation The outdoor fan remains energized if a pressure switch or compressor overload should open Outdoor fan motor will continue to operate for one minute after the compressor shuts off when the outdoor ambient is greater than or equal to 100 F 37 78 C to allow for easier starting during next cooling cycle On 187B models The outdoor fan motor is a PSC type A fan relay on the control board turns the fan off and on by opening and closing a high voltage circuit to the motor It does not change speeds between low and high stage operation On 180B models The outdoor fan is an ECM type The motor control is continuously powered with high voltage The motor speed is determined by electrical pulses provided by the PWM outputs on the control board The ECM motor RPM adj
31. onditioner THERMIDISTAT Thermidistat Heat Stage 2 Heat Stage 1 Cool Stage 1 Cool Stage 2 Fan 24VAC Hot Heating 24VAC Hot Cooling Dry Contact 1 Dry Contact 2 24VAC Common Humidify Outdoor Air Temp Remote Room Sensor OAT RRS Com Variable Speed Furnace 2 Stage Air Conditioner Outdoor Sensor Remote Room Sensor See Humidifier Instructions for proper wiring A09565 Thermidistat Model T6 PRH01 A amp T6 NRH01 A w VS Furnace amp 2 Stage Air Conditioner Fig 10 Thermidistat Wiring with 2 Stage Puron refrigerant Air Conditioner SINGLE STAGE N A OW2 COOL STAGE 1 Y1 W2 HEAT STAGE 1 N1 COOL STAGE 2 Y Y2 FAN G 24 VAC HOT R DEHUMIDIFY DHUM 24 VAC COMM C HUMIDIFY HUM N A B FURNACE TWO SPEED AIR CONDITIONER Y1 DHUM Y2 Com L bed I HUM OUTDOOR s1 SENSOR CONNECTION s2 See Humidifier Instructions for proper wiring SENSOR OUTDOOR A09567 Single Stage Furnace with 2 Stage Air Conditioner TWO STAGE THERMOSTAT SINGLE STAGE FURNACE TWO SPEED AI
32. requirements a o a N T a Oo a N T Final Checks IMPORTANT Before leaving job be sure to do the following 1 Ensure that all wiring is routed away from tubing and sheet metal edges to prevent rub through or wire pinching 2 Ensure that all wiring and tubing is secure in unit 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 Owner s Manual with owner Explain system opera tion and periodic maintenance requirements outlined in manual 5 Fill out Dealer Installation Checklist and place in customer file CARE AND MAINTENANCE For continuing high performance and to minimize possible equipment failure periodic maintenance must be performed on this equipment Frequency of maintenance may vary depending upon geographic areas such as coastal applications See Owner s Manual for information TROUBLESHOOTING If the compressor fails to operate with a cooling call Table 4 can be used to verify if there is any damage to the compressor windings causing system malfunction Table 4 Winding Resistance Winding resistance at 70 F 20 F Windi 21 11 C 11 11 C inding 187B024 pellets 187B048 187B060 Start S C 2 74 1 98 1 55 0 6 Run R C 0 8 0 75 0 48 0 49 Systems Communication Failure If communication with the Evolution Control
33. s 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 amp 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 and install a lockout tag There may be more than 1 disconnect switch Lock out and tag switch with a suitable warning label 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 gloves when handling parts Indoor Thermostat Control Options Model Evolution race Control Mica sae 187B 180B Yes o INSTALLATION RECOMMENDATIONS NOTE 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 Ensure that vapor and liquid tube diameters are appropriate for unit capacity 3 Run refrigerant tubes as directly as possible by avo
34. t relay should be wired between R and Y2 connections on the control board for Evolution Communicating Systems only see Fig 6 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 Compressor Operation The basic scroll design has been modified with the addition of an internal unloading mechanism that opens a by pass port in the first compression pocket effectively reducing the displacement of the scroll The opening and closing of the by pass port is controlled by an internal electrically operated solenoid The modulated scroll uses a single step of unloading to go from full capacity to approximately 67 capacity A single speed high efficiency motor continues to run while the scroll modulates between the two capacity steps Modulation is achieved by venting a portion of the gas in the first suction pocket back to the low side of the compressor thereby reducing the effective displacement of the compressor Full capacity is achieved by blocking these vents thus increasing the displacement to 100 A DC solenoid in the compressor controlled by a rectified 24 volt AC signal in the external solenoid plug moves the slider ring that covers and uncovers these vents The vent covers are arranged in such a manner that the compressor operates at approximately 67 capacity when the sole
35. tion located on control box cover and or in the Check Charge section of this instruction IMPORTANT Maximum liquid line size is 3 8 in OD for all residential applications including long line IMPORTANT Always install the factory supplied liquid line filter drier If replacing the filter drier refer to Product Data Digest for appropriate part number Obtain replacement filter driers from your distributor or branch INSTALLATION 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 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 local distributor for details and PE Professional Engineer certification if required by local authorities 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 un
36. tor 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 Ifthe outdoor air sensor indicates 10 F 5 56 C warmer than the coil sensor or the outdoor air sensor indicates 20 F 11 11 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 6 The thermistor comparison is 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 and or coil thermistor If the OAT sensor should fail low ambient cooling will not be allowed and the one minute outdoor fan off delay will not occur If the OCT sensor should fail low ambient cooling will not be allowed OAT Thermistor must be locked in place with spherical nib end facing towards the front of the control box THERMISTOR CURVE RESISTANCE KOHMS 0 T 0 20 40 60 80 100 120 17 77 6 67 4 44 15 56 26 67 37 78 48 89 TEMPERATURE F C A08054 Fig 7 Resistance Values Versus Temperature 10 OAT Thermistor must be locked in place with spherical nib end facing towards the front of the control box
37. usts to outdoor conditions as described in Table 3 The PWM output can be measured between the PWM1 and PWM2 terminals on the circuit board with a volt meter set to DC volts Table 3 Outdoor Fan Motor PWM Outdoor Temp DC volts Tolerance 2 LOW amp LOW STAGE HIGH STAGE MODEL 3 A 5 g HIGH STAGE OAT 104 F 40 C OAT 104 F 40 C Gar 494 F 40 C 180B036 9 06 10 23 11 90 NOTE For 180A models in low ambient cooling the PWM output for both high and low stage equals the value for low stage operation below 55 F 12 8 C In low ambient cooling below 55 F 12 78 C on 187B and 180B models the control board cycles the fan off and on 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 thermostat or 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 Two minute time delay to return to standby operation from last valid communication with Evolution only 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 78 C e There is no delay between staging from low to high and from high to low capacity The compressor will change from low to high and from high to low capacity on the fly to meet the dema
38. val check the unit will resume operation If the thermal 9 a oO T kirn faa N T a oO T i fea N T cutout trips for three consecutive cycles then unit operation is locked out for 4 hours and the appropriate fault code is displayed No 230V at Compressor If the compressor voltage is not sensed when the compressor should be starting the appropriate contactor may be stuck open or there is a wiring error The control will flash the appropriate fault code Check the contactor and control box wiring Troubleshooting units for proper switching between low amp high stages Check the suction pressures at the service valves Suction pressure should be reduced by 3 10 when switching from low to high capacity NOTE The liquid pressures are very similar between low and high stage operation so liquid pressure should not be used for troubleshooting Compressor current should increase 20 45 when switching from low to high stage The compressor solenoid when energized in high stage should measure 24vac When the compressor is operating in low stage the 24v DC compressor solenoid coil is de energized When the compressor is operating in high stage the 24v DC solenoid coil is energized The solenoid plug harness that is connected to the compressor has an internal rectifier that converts the 24v DC signal to 24v AC NOTE DO NOT INSTALL A PLUG WITHOUT AN INTERNAL RECTIFIER Unloader Test Procedure
39. with high and low pressure switches If the control senses the opening of a high or low pressure switch it will respond as follows 1 De energize the appropriate compressor contactor 2 Keep the outdoor fan operating for 15 minutes 3 Display the appropriate fault code see Table 6 4 After a 15 minute delay if there is still a call for cooling and the LPS or HPS is reset the appropriate compressor contac tor is energized 5 If LPS or 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 cooling 6 If LPS or 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 for airflow restrictions 8 In the event of a low pressure switch trip or low pressure lockout check the refrigerant charge and indoor airflow Control Fault If the outdoor unit control board has failed the control will flash the appropriate fault code See Table 6 The control board should be replaced Brown Out Protection If the line voltage is less than 187v for at least 4 seconds the appropriate compressor contactor and fan relay 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
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