Bryant 454 Air Conditioner User Manual
Contents
1. A98524 Fig 2 Models 661G and 661S Avoid direct tubing contact with water pipes duct work floor joists wall studs floors and walls Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing See Fig 3 Ensure that tubing insulation is pliable and completely surrounds vapor tube When necessary use hanger straps which are 1 in wide and conform to shape of tubing insulation See Fig 3 Isolate hanger straps from insulation by using metal sleeves bent to conform to shape of insulation NOTE Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK F LIQUID TUBE Wd E VAPOR TUBE INSULATION THROUGH THE WALL a Ost anaes Ha AROUND VAPOR TUBE ONLY INSULATION VAPOR TUBE 0 fo 0 a B 1 MIN gt La X LIQUID TUBE SUSPENSION A94208 Fig 3 Connecting Tube Installation When outdoor unit is connected to factory approved indoor unit outdoor unit contains system refrigerant charge for operation with indoor unit of the same size when connected by 15 ft of field supplied or factory accessory tubing For proper unit opera tion check refrigerant charge using charging informati2. 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 A 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 WARNING The unit cabinet must have an uninter rupted 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 Failure to follow this warning can result in an electric shock fire or death B 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 7 C Connect Control Wiring Route 24v control wires through control wiring grommet and connect leads to control wiring See Fig 8 and 9 Use No 18 AWG color coded insulated 35 C minimum wire If thermostat is located more than 100 ft 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 and must be separated from incoming power leads Use furnace transformer fan coil transformer or accessory trans former for control power 24v 40va minimum NOTE Use of available 2
3. file CARE AND MAINTENANCE For continuing high performance and to minimize possible equip ment failure periodic maintenance must be performed on this equipment Frequency of maintenance may vary depending upon geographic areas such as coastal applications Printed in U S A 661c187 Catalog No 5366 119
4. 8 Typical 24v Circuit Connections using Bryant Model HP Thermostat with Fan Coils and No Outdoor Thermostat 1 Outdoor Thermostat or 2 Outdoor Thermostats oe ee FA FB FC OTHER FD FF FH HP THERMOSTAT FAN COIL 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 EMERGENCY HEAT FA FB FC OTHER FD FF FH HP THERMOSTAT FAN COIL 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 EMERGENCY HEAT IF AVAILABLE NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostats IMPORTANT When using outdoor thermostats Wo must be FA FB FC ONE OTHER FD FF FH HEAT OUTDOOR HP THERMOSTAT FAN COIL PUMP THERMOSTAT 24 VAC HOT 24 VAC COM HEAT STAGE 2 COOL HEAT STAGE 1 EMERGENCY HEAT A97374 NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostat IMPORTANT When using outdoor thermostat Wo must be energized when requesting supplemental heat TWO HEAT OUTDOOR PUMP THERMOSTATS OTHER FK4C HEAT HP THERMOSTAT FAN COIL PUMP 24vACHOT RF 24 VAC COM HEAT STAGE 2 W2 R J1 JUMPER COOL HEAT STAGE 1 INDOOR FAN eae ped ed rvs cooLinG o energized when requesting supplemental heat Fig 9 Typical 24v Circuit Connections using Other HP Thermostats with Fan Coils and No Outdoor T EE LEGEND 24V FACTORY WIRING 24 V FIELD WIRING FIELD SPLICE CONNECTION OUTDOOR THERMOSTAT EMERGENCY
5. HEAT RELAY SUPPLEMENTAL HEAT RELAY A97413 CAUTION To prevent personal injury wear safety glasses protective clothing and gloves when handling refrigerant and observe the following A Back seating service valves are not equipped with Schrader valves Fully back seat counterclockwise valve stem before removing gage port cap Front seating service valves are equipped with Schrader valves A CAUTION Do not vent refrigerant to atmosphere Re cover during system repair or final unit disposal 1 Fully back seat open liquid and vapor tube service valves 2 Unit is shipped with valve stem s front seated closed and caps installed Replace stem caps after system is opened to refrigerant flow Replace caps finger tight and tighten with wrench an additional 1 12 turn 3 Close electrical disconnects to energize system 4 Set room thermostat to desired temperature Be sure set point is below indoor ambient temperature 5 Set room thermostat to HEAT or COOL and fan control to ON or AUTO mode as desired Operate unit for 15 minutes Check system refrigerant charge CAUTION 3 phase scroll compressors are rotation sensitive e A flashing LED on phase monitor indicates reverse rotation See Fig 10 and Table 3 This will not allow contactor to be energized e Disconnect power to unit and interchange 2 field wiring leads on unit contactor A Sequence of Operation Wi
6. VI CHECK INDOOR AND OUTDOOR CHECK FLO RATER PISTON Check indoor coil piston to see if it matches the required piston shown on outdoor unit rating plate If it does not match replace indoor coil piston with piston shipped with outdoor unit The piston shipped with outdoor unit is correct for any approved indoor coil combination TABLE 1 REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID AND VAPOR TUBE DIAMETERS IN LIQUID Connection Diameter UNIT SIZE Tube Diameter Connection Diameter VAPOR LONG LINE Tube Diameter Connection Diameter Tube Diameter 018 024 3 8 3 8 5 8 5 8 5 8 3 4 060 036 3 8 3 8 3 4 3 4 3 4 7 8 042 048 3 8 3 8 7 8 7 8 7 8 1 1 8 060 3 8 3 8 NOTES 7 8 1 1 8 7 8 1 1 8 1 Tube Diameters are for lengths up to 50 ft or 20 ft vertical differential For tubing lengths greater than 50 ft consult the Application Guideline and Service Manual for Air Conditioners and Heat Pumps Using R 22 Refrigerant CAUTION Remove indoor coil piston if unit is to be installed on system with a TXV metering device Check outdoor unit piston Remove retainer on liquid service valve and check piston size with matching number listed on outdoor unit rating plate VII CHECK DEFROST THERMOSTAT Check defrost thermostat to ensure it is properly located and securely attached There is a liquid header with a brass distributor and feeder tube going into outdoor
7. check should include all field and factory joints D 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 PISTON BODY PISTON PISTON RETAINER STRAINER A97512 Fig 6 Liquid Service Valve with Sweat Adapter Tube DISCONNECT PER N E C AND OR LOCAL CODES CONTACTOR O a oe FIELD POWER JERR 4 OO 3 PHASE ONLY Lua BLUE a Bes eee WIRING GROUND LUG A94025 Fig 7 Line Power Connections IX MAKE ELECTRICAL CONNECTIONS WARNING To avoid personal injury or death do not A supply power to unit with compressor terminal box cover removed Be sure field wiring complies with local and national fire safety and electrical codes and voltage to system is within limits shown on unit rating plate Contact local power company for correction of improper voltage See unit rating plate for recommended circuit protection device NOTE Operation of unit on improper line voltage constitutes abuse and could affect unit reliability See unit rating plate Do not install unit in system where voltage or phase imbalance 3 phase may fluctuate above or below permissible limits NOTE Use copper wire only between disconnect switch and unit
8. ture should drop below closing point of defrost thermostat approximately 30 F 5 Short between speed up terminals with a flat bladed screw driver See Fig 11 This reduces the timing sequence to 1 256th of original time See Table 2 6 When you hear reversing valve change position remove screwdriver immediately otherwise control will terminate normal 10 minute defrost cycle in approximately 2 sec NOTE Length of defrost cycle is dependent on the length of time it takes to remove screwdriver from test pins after reversing valve has shifted 7 Unit will remain in defrost for remainder of defrost cycle time or until defrost thermostat reopens at approximately 80 F coil temperature of liquid line 8 Turn off power to outdoor unit and reconnect fan motor lead to OF2 on control board See Fig 11 TEST 30 50 90 fai CES0110063 CES0130024 A91444 Fig 11 Defrost Control XIV CHECK CHARGE Factory charge is shown on unit rating plate To check charge in cooling mode refer to Cooling Only Procedure on unit wiring and charging label To check charge in heating mode refer to Heating Check Chart Procedure 2002 Bryant Heating amp Cooling Systems 7310 W Morris St Indianapolis IN 46231 Ag TABLE 2 DEFROST CONTROL SPEED UP TIMING SEQUENCE MINIMUM MINUTES SPEED UP NOMINA
9. 4v accessories may exceed the mini mum 40va power requirement Determine total transformer load ing and increase the transformer capacity or split the load with an accessory transformer as required D Final Wiring Check IMPORTANT Check factory wiring and wire connections to ensure terminations are secured properly Check wire routing to ensure wires are not in contact with tubing sheet metal etc X 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 50 ft XI 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 50 ft XII INSTALL ELECTRICAL ACCESSORIES Refer to the individual instructions packaged with kits or acces sories when installing XIII START UP CAUTION To prevent compressor damage or personal injury observe the following Do not overcharge system with refrigerant Do not operate unit in a vacuum or at negative pressure Do not disable low pressure switch In scroll compressor applications eDome temperatur
10. L MAXIMUM MINUTES PARAMETER 30 minute cycle 50 minute cycle 90 minute cycle 10 minute cycle 5 minutes NOTE If superheat or subcooling charging conditions are not favorable charge must be weighed in accordance with unit rating plate 0 6 oz ft of 3 8 in liquid line above or below 15 ft respectively A Heating Check Chart Procedure To check system operation during heating cycle refer to the Heating Check Chart on outdoor unit This chart indicates 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 When charging is necessary during heating season charge must be weighed in accordance with unit rating plate 0 6 oz ft of 3 8 in liquid line above or below 15 ft respectively EXAMPLE To calculate additional charge required for a 25 ft line set 25 ft 15 ft 10 ft X 0 6 oz ft 6 oz of additional charge XV FINAL CHECKS IMPORTANT Before leaving job be sure to do the following 1 Securely fasten all panels and covers 2 Tighten service valve stem caps to 1 12 turn past finger tight 3 Leave User s Manual with owner Explain system operation and periodic maintenance requirements outlined in manual 4 Fill out Dealer Installation Checklist and place in customer
11. coil At the end of 1 of the feeder tubes there is a 3 8 in O D stub tube approximately 2 in long See Fig 5 The defrost thermostat should be located on stub tube Note that there is only 1 stub tube used with liquid header and on most units it is the bottom circuit FEEDER TUBE STUB TUBE DEFROST THERMOSTAT A97517 Fig 5 Defrost Thermostat Location Vill MAKE PIPING CONNECTIONS WARNING Relieve pressure and recover all refrigerant A before system repair or final unit disposal to avoid personal injury or death Use all service ports and open all flow control devices including solenoid valves CAUTION If ANY refrigerant tubing is buried provide a 6 in vertical rise at service valve Refrigerant tubing A lengths up to 36 in may be buried without further special consideration For lengths above 36 in consult your local distributor ae CAUTION To prevent damage to unit or service valves observe the following Use a brazing shield eWrap service valves with wet cloth or use a heat sink material Outdoor units may be connected to indoor section using accessory tubing package or field supplied refrigerant grade tubing of correct size and condition For tubing requirements beyond 50 ft in length or 20 ft vertical differential substantial capacity and performance losses can occur Following the recommendations in the Residen tial Split System Long Line Application Guidel
12. es may be hot BRYANT BRYANT pre ara FA FB Ee PROGRAMMABLE ONE MODEL HP FAN COIL THERMOSTAT FA FB FC FD FF FH HEAT OUTDOOR MODEL HP FAN COIL PUMP THERMOSTAT 24 VAC HOT INDOOR FAN 24 VAC HOT HEAT STAGE 2 INDOOR FAN COOL HEAT STAGE 1 HEAT STAGE 2 RVS COOLING COOL HEAT NOT USED STAGE 1 z4vaccom _c HH 7e RVS COOLING NOT USED NOT USED IF AVAILABLE TROUBLE OPTIONAL 24 VAC COM SENSOR CONNECTION NOT USED A97370 TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostat IMPORTANT When using outdoor thermostat Wo must be energized when requesting supplemental heat A97399 BRYANT PROGRAMMABLE BRYANT THERMOSTAT FK4C HEAT PROGRAMMABLE FA FB FC TWO MODEL HP FAN COIL PUMP THERMOSTAT FD FF FH HEAT OUTDOOR MODEL HP FAN COIL PUMP THERMOSTATS 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE NOTE Remove wires from crimp nut in indoor fan coil when installing outdoor thermostats IMPORTANT When using outdoor thermostats Wo must be energized when requesting supplemental heat 24 VAC HOT INDOOR FAN HEAT STAGE 2 COOL HEAT STAGE 1 RVS COOLING NOT USED 24 VAC COM NOT USED TROUBLE OPTIONAL OUTDOOR SENSOR CONNECTION A97372 A97400 Fig
13. esult 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 WARNING 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 es with a suitable warning label Electrical shock can cause personal injury or death 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 sounds may disturb customer Ensure that vapor and liquid tube diameters are appropriate to capacity of unit 3 Run refrigerant tubes as directly as possible by avoiding unnecessary turns and bends Leave some slack between structure and unit to absorb vibration 5 When passing refrigerant tubes through the wall seal opening with RTV or other pliable silicon based caulk See Fig 3 and start up instructions Il 661C 18 6 Il 661C 18 7 2 02 Cancels A94355
14. ine will reduce these losses Refer to Table 1 for field tubing equivalent line length 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 A Outdoor Unit Connected to Factory Approved In door Unit Outdoor unit contains correct system refrigerant charge for opera tion with indoor unit of same size when connected by 15 ft of field supplied or factory accessory tubing Check refrigerant charge for maximum efficiency B Refrigerant Tubing Connect tubing to fittings on outdoor unit vapor and liquid service valves See Table 1 Use refrigerant grade tubing Refer to appropriate section below for type of service valves installed on unit C Sweat Connection CAUTION To avoid valve damage while brazing ser AN vice valves must be wrapped in a heat sinking material such as a wet cloth Remove plastic retainer holding outdoor piston in liquid service valve and connect sweat flare adapter provided to valve See Fig 6 Connect refrigerant tubing to fittings on outdoor unit vapor and liquid service valves Service valves are closed from factory and ready for brazing After wrapping service valve with a wet cloth tubing set can be brazed to service valve using either silver bearing or non silver bearing brazing material Consult local code require ments Refrigerant tubing and indoor coil are now ready for leak testing This
15. installation 10 SEER SPLIT SYSTEM HEAT PUMP NOTE Read the entire instruction manual before starting the installation 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 thor oughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and National Electrical Code NEC for special requirements Recognize safety information This is the safety alert symbol N When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand the signal words DANGER WARNING and CAU TION These words are used with the safety alert symbol DAN GER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could r
16. on located on control box cover IMPORTANT Maximum liquid line size is 3 8 in O D for all residential applications including long line IMPORTANT Always install a liquid line filter drier Refer to Product Data Sheet for appropriate part number Obtain filter drier from service parts or your distributor or branch INSTALLATION l CHECK EQUIPMENT AND JOB SITE A Unpack Unit Move to final location Remove carton taking care not to damage unit B Inspect Equipment File claim with shipping company prior to installation if shipment is damaged or incomplete Locate unit rating plate on unit service panel It contains information needed to properly install unit Check rating plate to be sure unit matches job specifications ll 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 4 to determine base pan size and knockout hole location On rooftop applications mount on level platform or frame 6 in above roof surface 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 to achieve adequate defrost C
17. onsult Low Ambient Guideline for wind baffle construction 3D 9 53 TIEDOWN KNOCKOUTS 2 PLACES A94199 DIMENSIONS IN MINIMUM MOUNTING PAD DIMENSIONS UNIT SIZE 018 030 22 1 2 X 22 1 2 042 060 30 X 30 Fig 4 Mounting Unit to Pad NOTE Unit must be level to within 2 3 8 in ft per compressor manufacturer specifications lll CLEARANCE REQUIREMENTS When installing allow sufficient space for airflow clearance wiring refrigerant piping and service Allow 30 in clearance to service end of unit and 48 in above unit For proper airflow a 6 in clearance on side of unit and 12 in on all remaining sides must be maintained Maintain a distance of 24 in 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 above roof surface IV OPERATING AMBIENTS The minimum outdoor operating ambient in cooling mode is 55 F and the maximum outdoor operating ambient in cooling mode is 125 F The maximum outdoor operating ambient in heating mode is 66 F V ELEVATE UNIT A CAUTION Accumulation of water and ice in base pan may cause equipment damage In areas where prolonged freezing temperatures are encountered elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit
18. th power supplied to indoor and outdoor units transformer is energized COOLING On a call for cooling thermostat makes circuits R O R Y and R G Circuit R O energizes reversing valve switching it to cooling position On three phase models with scroll compressors the units g are equipped with a phase monitor to detect if the incoming power is correctly phased for compressor operation See Fig 10 and Table 3 If the phasing is correct circuit R Y energizes contactor starting outdoor fan motor and compressor circuit R G energizes indoor unit blower relay starting indoor blower motor on high speed NOTE If the phasing is incorrect the contactor will not be energized To correct the phasing interchange any two of the three power connections on the field side When thermostat is satisfied its contacts open de energizing the contactor and blower relay Compressor and motors should stop NOTE If indoor unit is equipped with a time delay relay circuit the blower runs an additional 90 sec to increase system efficiency HEATING On a call for heating thermostat makes circuits R Y and R G If phasing is correct circuit R Y energizes contactor starting out door fan motor and compressor Circuit R G energizes indoor blower relay starting blower motor on high speed Should temperature continue to fall R W2 is made through second stage room thermostat bulb Circuit R W2 energizes a sequencer bringing on first bank of s
19. upplemental electric heat and providing electrical potential to second heater sequencer if used If outdoor temperature falls below setting of outdoor thermostat field installed option contacts close to complete circuit and bring on second bank of supplemental electric heat When thermostat is satisfied its contacts open de energizing contactor and sequencer All heaters and motors should stop CONTACTOR 24VAC COM s 000 as OFF NO 24VAC ON OK FLASH PHASE PROBLEM L2 HK SSACOO02 L3 Et A00010 Fig 10 Phase Monitor Control DEFROST The defrost control is a time temperature control which includes a field selectable quick connects located at board edge time period between defrost cycles 30 50 or 90 minutes factory set at 90 minutes The electronic timer and defrost cycle start only when contactor energized and defrost thermostat is closed Defrost mode is identical to cooling mode except that outdoor fan motor stops and second stage heat is turned on to continue warming conditioned space To initiate defrost the defrost thermostat must be closed This can be accomplished as follows 1 Turn off power to outdoor unit 2 Disconnect outdoor fan motor lead from OF2 on control board See Fig 11 Tape lead to prevent grounding 3 Restart unit in heating mode allowing frost to accumulate on outdoor coil 4 After a few minutes in heating mode liquid line tempera
Download Pdf Manuals
Related Search