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Bryant 574B Gas Heater User Manual

1. KE ow os 36 914 Ductpanel 2 x s s i s sas sasaa sua raa 0 5 5 12 304 8 Minimum distances If unit is placed less than 12 in 304 8 mm from wall system then the system performance may be compromised LEGEND CG Center of Gravity COND Condenser EVAP Evaporator NEC National Electrical Code REQ D Required Note Dimensions are in in mm 198 5 31 44 FIELD ENTRY SERVICE PORTS 23 0 oc 10 6 2 18 406 4 7B 546 21 50 254 0 10 00 254 0 10 00 RETURN SUPPLY OPTIONAL S OPENING 80 5 3 17 m Y COND COIL 1 NOW BENT Tu T COND COIL X EVAP COIL TOP VIEW REQ D CLEARANCES TO COMBUSTIBLE MAT L in mm Top ot unit rs we OR UE Cx 9 4 14 355 6 Duct side of unit a xw de xk de RE de we a 2 50 8 Side opposite 14 355 6 Bottom of unit o xe ow ue xe Re uh de cu op 0 50 12 7 Flue panel 36 914 4 NEC REQ D CLEARANCES in mm Between units power entry side 42 1066 8 Unit and ungrounded surfaces power entry side 36 914 Unit and block or concrete walls and other grounded surfaces control box side 42 1066 8 1193 9 141 001 116 3 4 58 28 6 1 13 DIA
2. SPLICE QR CAS VALVE RELAY BL C SPLICE MARKED HPS HIGH PRESSURE SWITCH FACTORY WIRING HS HALL EFFECT SENSOR ll _ FIELD CONTROL WIRING HV TRAN HIGH VOLTAGE TRANSFORMER FIELD POWER WIRING 1 ACCESSORY OR OPTIONAL ICH WIRING 1681108 INTEGRATED CONTROL MOTOR 0 INDICATE COMMON 10M INDUCED DRAFT MOTOR POTENTIAL ONLY IFM INDOOR FAN MOTOR 16 INTEGRATED GAS UNIT NOT TO REPRESENT WIRING CONTROLLER BR BLOWER RELAY IMR INDOOR MOTOR RELAY CONTACTOR I Lor a E SWITCH L LIMI CAP MAIN GAS VALVE COMP COMPRESSOR MOTOR OFM 0 R CR COMBUSTION RELAY QUADRUPLE TERMINAL RS ROLLOUT SWITCH TRAN TRANSFORMER COOL ING LOGIC 0 1 30 ENERGIZED DE ENERGIZED HEATING FAN LOGIC 0 45 T 1 45 W BR Li BR ENERGIZED DE ENERGIZED 24V SPLICE BOX FIELD THERMOSTAT COMMON UNIT COMPONENT ARRANGEMENT COMPRESSOR 1 0008 FAN SECTION SECTION MOUNTING PANEL ABOVE INDOOR BLOWER GAS SECTION TRANI BLU vi MAL ATION HARDWARE FAILURE FAN ON OFF DELAY MODIFIED LIMIT SWITCH FAULT FLAME SENSE FAULT 5 CONSECUTIVE LIMIT SWITCH FAULTS IGNITION LOCKOUT FAULT INDUCER SWITCH FAULT ROLLOUT SWITCH FAULT INTERNAL CONTROL FAULT TEMPORARY ONE 2 IF MORE THAN ONE ERROR 8 HOUR AUTOMATIC RESET FAULT NOTE 9 9 FLASHES 1 3 SECOND PAUSE BETWEEN ERROR CODE DISPLAY EXISTS ALL APPLICABLE ERROR CODES
3. MOCP Maximum Overcurrent Protection RLA Rated Load Amps _ 1371 3 Heater capacity KW based on heater voltage of 208v 240v amp 480v _ 457 If power distribution voltage to unit varies from rated heater voltage heater KW will vary accordingly Determine maximum deviation from average voltage 457 452 5 NOTES BC 464 457 7 1 In compliance with NEC National Electrical Code requirements AC 457 455 2 for multimotor and combination load equipment refer to NEC i T RE Articles 430 and 440 the overcurrent protective device for the MAITU l unit shall be Power Supply fuse The CGA Canadian Gas Determine percent of voltage imbalance Association units may be fuse or circuit breaker 7 2 Minimum wire size is based 60 copper wire If other than Voltage Imbalance 100 x AST 60 C wire is used or if length exceeds wire length in table determine size from NEC 153 3 Unbalanced 3 Phase Supply Voltage m u Never operate a motor where a phase imbalance in supply volt This amount of phase imbalance is satisfactory as it is below the age is greater than 2 Use the following formula to determine maximum allowable 2 the percentage of voltage imbalance Voltage imbalance IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local electric utility company _ 100 voltage deviation from average voltage immediately average voltage C99024
4. 21 TYPICAL WIRING SCHEMATIC 208 230 1 60 SHOWN SCHEMATIC in C FIELD OFM ep YEL jus EL L e Le 23 L 9 BR LEGEND F FOR 042 060 LA FIELD SPLICE UNITS ONLY EQUIP EQUIPMENT C C TERMINAL MARKED FS FLAME SENSOR POWER BLK TERMINAL UNMARKED FU FUSE Ju m anh CeSPLICE MARKED HPS HIGH PRESSURE SWITCH YEL FACTORY WIRING HS HALL EFFECT SENSOR BLU S FIELD CONTROL WIRING HV TRAN HIGH VOLTAGE TRANSFORMER ETE NE FIELD POWER WIRING IGN I TOR ACCESSORY OR OPTIONAL CM INTEGRATED CONTROL 7 Z YEL e lt BLK WIRING T Tt P IDM INDUCED DRAFT MOTOR 2 G 2 14 5 INDOOR FAN MOTOR ENERGIZED DE ENERGIZED POTENTIAL ONLY BLK PL4 4 NOT TO REPRESENT WIRING 160 INTEGRATED GAS UNIT CONTROLLER HEATING FAN LOGIC YEL 2 lt lt YEL BR BLOWER RELAY IMR INDOOR MOTOR RELAY PRIMAR
5. 17 3 8 441 40 1 4 1022 Notes 1 Roof curb must be set up for unit being installed 2 Seal strip must be applied as required to unit being installed 3 Dimensions in are in millimeters 4 Roof curb is made of 16 gage steel 5 Table lists only the dimensions per part number that have changed 6 Attach ductwork to curb flanges of duct rest on curb 7 Insulated panels 1 in thick fiberglass 1 Ib density 8 Dimensions are in inches 9 When unit mounting screw is used Note A a retainer bracket must be used as well This bracket must also be used when required by code for hurricane or seismic conditions This bracket is available through Micrometl 11 574B CORNER WEIGHTS SELECTION PROCEDURE WITH EXAMPLE DETERMINE COOLING AND HEATING REQUIREMENTS AT DESIGN CONDITIONS Given Required Cooling Capacity 34 500 Btuh Sensible Heat Capacity SHC 26 000 Btuh Required Heating 60 000 Btuh Condenser Entering Air Temperature 95 F Indoor Air Temperature 80 F edb 67 F ewb Evaporator Air Quantity 1200 CFM External Static 0 2 in wg Electrical Characteristics 230 1 60 SELECT UNIT BASED ON REQUIRED COOLING CAPACITY Ent
6. NE HEATING INPUT OUTPUT CAPACITY TEMPERATURE RISE Btuh Btuh RANGE F 024040 030060 46 000 35 65 78 4 036060 60 000 46 000 25 55 78 7 042060 47 000 20 50 78 7 036090 042090 048090 060090 048115 115 000 92 000 048130 104 000 060130 130 000 103 000 LEGEND AFUE Annual Fuel Utilization Efficiency NOTE Before purchasing this appliance read important energy cost and efficiency information available from your retailer OUTDOOR SOUND OCTAVE BAND DATA DECIBELS Lw A MODEL NO 574B Frequency Hz 00 9 02 060 gs 6 54 s s0 se 6 6 686 so eo au Z m m 6 Z 75 es G J m axo so ma j 6 61 axo s7 so PHYSICAL DATA FoPERATNG WEIGHT b E 3 s COMPRESSORS Scroll REFRIGERANT R 410A Quantity 0 cg REFRIGERANT METERING DEVICE indoor TXV CONDENSER COIL Rows Fins in 2 21 2 21 2 21 Face Area sq ft 11 95 13 7 13 7 CONDENSER FAN Nominal Cfm Diameter in Motor Hp Rpm EVAPORATOR COIL Rows fins in 3 15 4 15 4 15 Face Area sq ft 3 7 3 7 3 7 EVAPORATOR BLOWER Nominal Airflow Cfm 800 Size in 10 x 10 Motor Hp Rpm 1 2 FURNACE SECTION Burner Orifice No Qty Drill Size Natural 1 8 825 1 8 825 1 8 825 Burner Orifice No Qty
7. Condenser Evaporator Air Ewb F e ev e m e em 36 9 37 4 37 9 34 7 27 9 36 9 29 6 2 7 2 7 2 8 2 8 35 3 35 6 36 4 36 3 34 0 35 6 28 9 3 0 3 0 3 1 3 1 33 7 33 8 34 8 34 4 32 9 26 4 34 4 3 3 3 3 3 4 3 4 31 9 32 4 31 5 25 7 32 8 27 3 3 6 3 6 3 8 3 7 30 4 29 8 31 3 30 3 30 0 24 8 31 0 26 4 4 0 4 0 4 1 4 1 28 4 27 5 29 3 28 0 28 2 23 8 29 0 25 4 Evaporator Air CFM BF TE Outdoor Air 1400 0 12 1575 0 14 Entering Condenser Evaporator Air Ewb F See Legend and Notes on page 15 14 PERFORMANCE DATA cont STANDARD INDOOR ECM MOTOR COOLING CAPACITIES cont 574B048 COOLING PERFORMANCE TABLE Evaporator Air CFM BF Temp F Outdoor Air Entering Condenser 1260 0 06 1400 0 06 1600 0 08 Evaporator Air Ewb F ev e m e e 45 8 49 6 54 7 46 7 47 3 51 2 56 3 48 1 48 7 52 5 57 8 32 0 33 4 27 2 42 6 34 3 35 8 28 9 45 8 36 8 38 4 30 6 3 4 3 4 3 4 3 4 3 4 3 4 3 5 3 4 3 4 3 4 3 5 43 6 47 2 52 1 44 3 44 9 48 6 53 5 45 6 46 1 49 9 54 8 30 9 32 3 26 2 41 3 33 2 34 7 27 7 44 3 35 5 37 3 29 4 3 7 3 8 3 8 3 7 3 7 3 8 3 8 3 8 3 8 3 8 3 8 41 3 44 7 49 4 41 8 42 4 50 7 44 2 43 7 47 0 51 8 29 8 31 2 25 2 39 9 32 0 33 6 26 7 43 0 34 6 36 1 28 3 4 1 4 2 4 2 4 1 4 1 4 2 4 2 4 2 4 1 4 2 4 2 38 9 42 1 46 4 39 6 39 8 47 6 41 5 40 8 44 0 48 5 28 7 30 1 24 0 38 3 25 5 40 0 33 2 34 8 27 0 4 6 4 6 4 6 4 6
8. sensible capacity Btuh BF Bypass Factor db edb 1 10 cfm Eur UD sss tiwb Wet bulb temperature corresponding to enthalpy of air leaving kW Total Unit Power Input evaporator coil hi SHC Sensible Heat Capacity 1000 Btuh lwb TC Cooling Capacity 1000 Btuh ee ee total capacity Btuh ECM Electronic Computated Motor ewb 4 5 x cfm TVA Conaltions 7o mentenng dry bulb Where hewb Enthalpy of air entering evaporator coil NOTES 1 Ratings are net they account for the effects 4 The SHC is based on 80 F edb temperature of air entering evaporator of the evaporator fan motor power and heat coil Below 80 F edb subtract Corr Factor x CFM from SHC above 2 Direct interpolation is permissible Do not extrapolate 80 F edb add Corr Factor x CFM to SHC Correction Factor 1 10 x 3 The following formulas may be used 15 1 edb 80 FILTER PRESSURE DROP wg N o tc LL 20 X 24 X 1 24 X 30 X 1 16 574B COOLING DRY COIL AIRFLOW SMALL Dr ee COOLING DEHUMIDIFY COOLING um 574B COOLING DRY COIL ECM AIRFLOW LARGE CABINET CFM ADJUST SIZE EXTERNAL STATIC PRESSURE ANCE 0 1 1 0 0 1 1 0 0 1 1 0 COOLING 048 COOLING DEHUMIDIFY 1025 1025 1200 COOLING DEHUMIDIFY 1305 1305 1535 T HEATING Lu EASY SELECT BOARD SETTING CFM EXTERNAL STATIC PRESSURE 0 0 0 39 0 4
9. Btuh Btuh NUMBERt 40 000 31 000 40 000 31 000 60 000 46 000 57 000 43 720 0 2000 90 000 70 000 0 2000 85 500 66 520 90 094 72 075 94 571 75 657 101 284 80 214 As the height above sea level increases there is less oxygen per cubic ft of air Therefore heat input rate should be reduced at higher altitudes T Orifices available through your Bryant distributor 574B ECM WET COIL PRESSURE DROP UNIT STANDARD CFM U O S S S S S O SLE 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 aa uu lai s ce 030 0007 0010 0012 0 015 0018 0021 0024 096 0019 0 023 0 027 0 082 0 097 2 O047 wm 9049217 0 000 0024 oat oc 0439 oo ow 008 09 0036 0041 0046 oos 0057 0063 1 es 9 0045 0049 055 TYPICAL PIPING AND WIRING ROOF MOUNTING CURB RETURN AIR FLEXIBLE DUCT SUPPLY AIR FLEXIBLE DUCT CEILING CONCENTRIC DIFFUSER BOX FIELD SUPPLIED C00023 INDOOR FROM POWER SOURCE DISCONNECT PER NEC NEC NATIONAL ELECTRICAL CODE 00022 19 APPLICATION DATA Condensate trap A 2 in condensate trap must be field supplied 1 MIN TRAP O
10. Entering Condenser Evaporator Air Ewb F e e m e ej s 24 5 26 5 29 1 24 6 25 1 27 1 29 8 25 1 25 5 27 4 30 4 21 3 18 7 15 4 23 5 22 8 19 8 16 1 25 0 24 2 20 8 16 7 1 7 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 8 1 9 23 3 25 3 27 9 23 5 23 9 25 8 28 5 23 9 24 3 26 2 28 9 20 7 18 1 14 9 22 9 22 2 19 2 15 6 24 3 23 6 20 3 16 2 1 9 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 0 2 1 2 1 22 2 24 0 26 5 22 3 22 6 24 5 27 0 22 7 23 0 24 8 27 4 20 2 17 6 14 3 22 3 21 6 18 7 15 0 23 6 22 9 19 7 15 6 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 2 3 20 9 22 6 25 0 21 0 21 3 23 0 25 4 21 6 21 7 23 3 25 7 19 5 16 9 13 7 21 6 20 9 18 0 14 3 22 5 22 2 19 0 14 9 2 4 2 4 2 4 2 4 2 4 2 5 2 5 2 5 2 5 2 5 2 5 19 5 21 1 23 3 19 8 19 9 21 5 23 7 20 7 20 4 21 7 23 6 18 8 16 3 13 0 20 6 20 2 17 3 13 7 21 5 21 2 18 3 14 1 2 7 2 7 2 7 2 7 2 7 2 7 2 7 2 7 2 7 2 8 2 8 18 0 19 4 21 4 18 5 18 5 19 5 21 7 19 0 19 0 19 9 21 9 18 1 15 5 12 3 19 2 19 2 16 5 12 9 19 8 19 7 17 6 13 5 2 9 3 0 3 0 3 0 3 0 3 0 3 0 3 0 3 0 3 1 3 1 574B030 COOLING PERFORMANCE TABLE Evaporator Air CFM BF 000 9900 000 Outdoor Air 875 0 08 1000 0 09 1125 0 10 Entering Condenser Evaporator Air Ewb F See Legend and Notes on page 15 PERFORMANCE DATA cont STANDARD INDOOR ECM MOTOR COOLING CAPACITIES cont 574B036 COOLING PERFORMANCE TABLE Evaporator Air CFM BF Joy __ 1 Outdoor Air 1100 0 06 1225 0 07 1400 0 08 Entering
11. O Special Features Available 1 Coil Options Shall include factory installed optional tin plated in door copper copper and vinyl coated refrigerant coils 2 Economizer a Economizer controls capable of providing free cool ing using outside air b Equipped with low leakage dampers not to exceed 396 leakage at 1 0 in wg pressure differential c Spring return motor shuts off outdoor damper on power failure 3 Flat Roof Curb Curbs shall have seal strip and a wood nailer for flash ing and shall be installed per manufacturer s instruc tions 4 Manual Outdoor Air Damper Package shall consist of damper birdscreen and rain hood which can be preset to admit outdoor air for year round ventilation Heating amp Cooling Systems 2003 Bryant Heating amp Cooling Systems 7310 W Morris St Indpls IN 46231 28 10 11 12 13 14 15 Thermostat To provide for one stage heating and cooling in addition manual or automatic changeover and indoor fan control Natural to Propane Conversion Kit Shall be complete with all required hardware to convert to liquid propane LP operation Low Ambient Package Shall consist of a solid state control and condenser coil temperature sensor for controlling condenser fan mo tor operation which shall allow unit to operate down to 0 F outdoor ambient temperature Filter Rack Kit Shall provide filter mounting for downflow applications Squar
12. POWER ENTRY 22 2 0 88 DIA HOLE CONTROL ENTRY 19 0 0 75 N P T LI ue x 22 0 DP COMPRESSOR BLOWER GAS SECTION FLUE HOOD 46 8 12 7 0 50 5 amp ELECTRICAL ACCESS PANEL 1 84 GAS ENTRY 12 85 a ES 1226 3 2 08 831 0 48 28 32 721 4 81 LEFT SIDE VIEW FRONT VIEW RIGHT SIDE VIEW ELECTRICAL CHARACTERISTICS UNIT WEIGHT UNIT HEIGHT IN MM A CENTER OF GRAVITY IN MM __ X Y Z 574B024040 208 230 1 60 39 02 991 1 20 508 19 3 489 17 6 447 574B030040 060 208 230 1 60 i 176 208 230 1 60 574 036060 090 322 41 02 1041 9 20 508 14 355 6 13 330 2 BASE UNIT DIMENSIONS 574B042 060 4 2 11 406 6 16 01 COND COIL SUPPLY RETURN DUCT DUCT OPENING OPEN ING Y EVAP COIL 3 351 2 351 3 48 13 83 13 67 13 83 REAR VIEW REQUIRED CLEARANCE FOR OPERATION AND SERVICING in mm EVAR COIL ACCESS SIDE 36 00 914 0 POWER ENTRY SIDE 36 00 914 0 EXCEPT FOR NEC REQUIREMENTS UNIT TOP e E 36 00 914 0 SIDE OPPOSITE SS 36 00 914 0 DUCTPANE 12 00 304 8 MINIMUM DISTANCES IF UNIT IS PLACED LESS THAN 12 00 304 8 FROM WALL SYSTEM THEN SYSTEM PERFORMANCE MAYBE COMPROMISE 1193 9 1090 6 42 94 FIELD ENTRY 23 0 2 SER
13. SHALL BE DISPLAYED NUMERICAL SEQUENCE PRIMARY 230V 200 230 oT Y SECONDARY qnom O BRN TO FIELD SPLICE gt OR 10 SECI SEE NOTES TO TRANS TO CONT GROUNDED THRU STANDOFF BRE SECI BL 0 70 81 K 9 5LU 0 1 0 8L U 5 LPS NOTES 1 1F ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED MUST BE REPLACED WITH TYPE 90 DEGREE C WIRE OR ITS EQUIVALENT OFF 2 SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES 1 FLASH 3 USE 75 DEGREE COPPER CONDUCTORS FOR FIELD INSTALLATION 2 FLASHES 4 REPLACE LOW VOLTAGE FUSES WITH NO GREATER THAN 5 AMP FUSES 3 5 MODELS 48GP024 036 HAS LSI AND 152 IN SERIES FLASHES ON MODELS 486 042 060 HAS LSI ONLY 6 REMOVE JI WHEN USING THERMIDISTAT HUMIDISTAT AND T REMOVE J2 8 10 BE WIRED ACCORDANCE WITH AND LOCAL CODES 9 THIS CODE INDICATES INTERNAL PROCESSOR FAULT THAT WILL RESET ITSELF ONE HOUR FAULT CAN BE CAUSED BY STRAY RF SIGNALS THE STRUCTURE OR NEARBY THIS IS A UL REQUIREMENT FAULT FLASHES 48XP500149 C03025 23 CONTROLS OPERATING SEQUENCE Heating On a call for heating terminal W of the thermostat is energized starting the induced draft motor When the hall effect sensor on the induced draft motor senses that it has reached the required speed the burner sequence begins This function is performed by the integrated gas co
14. 0 69 0 7 1 0 0 0 0 39 0 4 0 69 0 7 1 0 0 0 0 39 0 4 0 69 0 7 1 0 0 0 0 39 0 4 0 69 0 7 1 0 HEAT SIZE 710 Eo eee o oem L poe he w jq pee eg We es 574 HEATING AIRFLOW LARGE CABINET Re 9 1 wo EXTERNAL STATIC SIZE PRESSURE 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 GASHEATSIZE 1800 A 574B ECM AIR FLOW VS TEMPERATURE RISE CHART RATED GAS AIRFLOW SETTING CALCULATED MIN MAX MAX UNIT COOLING SIZE INPUT RATE EAST SELECT TEMPERATURE TEMP TEMP DISCH X 1000 SCFM RISE RISE RISE TEMP 024 800 030 800 Oo n o 6 5 og 5 16 og 99 ia sa 5 r Mg o 1 4 2 s p s 5 3 6 ro a oo 2 5 19 2 5 8 sug 6 ro sug ia 0 2 r PERFORMANCE DATA CONT ECONOMIZER 1 IN FILTER PRESSURE DROP in wg UNIT 574B PRESSURE DROP 024 036 042 060 HIGH ALTITUDE COMPENSATION NATURAL GAS ONLY LIQUID PROPANE ONLY ORIFICE CONVERSION 3 5 wc ORIFICE CONVERSION WC MANIFOLD PRESSURE MANIFOLD PRESSURE INPUT OUTPUT ORIFICE INPUT OUTPUT ORIFICE ALTITUDE ft Btuh ALTITUDE ft
15. Drill Size Propane HIGH PRESSURE SWITCH psig Cutout 610 15 Reset Auto 420 x 25 LOSS OF CHARGE LOW PRESSURE SWITCH Liquid Line psig 20 5 Cutout 45 E 0 Reset Auto RETURN AIR FILTERS in t 20x24x1 20x24x1 20x24x1 20x24x1 20 24 1 24 30 1 24x30x1 t Required filter sizes shown are based on the larger of the ARI Air Conditioning amp Refrigeration Institute rated cooling air flow or the heating airflow velocity of 300 ft min for throwaway type or 450 ft min for high capacity type Air filter pressure drop for non standard filters must not exceed 0 08 in wg Based on altitude of 0 to 2000 ft PHYSICAL DATA cont UNIT SIZE 574B 048090 048115 048130 060090 060115 060130 NOMINAL CAPACITY ton OPERATING WEIGHT Ib COMPRESSORS Scroll Quantity 1 REFRIGERANT R 410A Quantity b 125 11 25 11 25 REFRIGERANT DEVICE noor TXV CONDENSER COIL Rows Fins in 2 21 2 21 2 21 2 21 2 21 2 21 CONDENSER FAN Nominal Cfm 3300 3300 3300 3300 3300 3300 Diameter in 22 22 22 22 22 22 Motor Hp Rpm 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 1 4 1100 EVAPORATOR COIL Face Area sq ft 4 7 4 7 4 7 5 7 5 7 5 7 EVAPORATOR BLOWER Nominal Airflow Cfm 1400 1400 1750 1750 Size in 11 10 11 10 11 10 11 10 Motor FURNACE SECTION Burner Orifice No Qty Drill Size Natural Gas Burner Orifice No Qty Drill Size Propane Gas
16. State Time Guard Device Lifting Kit LP to Natural Conversion Kit Economizer with solid state controls and barometric relief dampers includes filter racks and provide outdoor air during cooling and reduce compressor operation Manual outside air damper includes hood and filter rack with adjustable damper blade for up to 25 outdoor air Flat roof curbs in both 8 in and 14 in sizes are available for roof mounted applications Square to round duct transition kit enables 024 048 size units to be fitted to 14 in round ductwork Compressor hard start kit assists compressor start up by pro viding additional starting torque on single phase units and pro longs compressor motor life Thermostats provide control for the system heating and cooling functions Thermostat models are available in both programma ble and non programmable versions Crankcase heater provides anti floodback protection for low load cooling applications LP liquid propane conversion kit allows for conversion from natural gas to liquid propane fuel Low ambient kit Motormaster II control allows the use of mechanical cooling down to outdoor temperatures as low as O F Solid state Time Guard Il device provides short cycling pro tection for the compressor Not required with corporate electron ic thermostats Filter rack features easy installation serviceability and high filtering performance for vertical applications High altitude kit is f
17. from steel and shall be double inlet type with forward curved blades with corrosion resistant finish Fan wheel shall be dynamically balanced 3 Condenser fan shall be direct drive propeller type with aluminum blades riveted to corrosion resistant steel spiders be dynamically balanced and discharge air vertically D Compressor 1 Fully hermetic compressors with factory installed vibration isolation 2 Scroll compressors shall be standard on all units E Coils Evaporator and condenser coils shall have aluminum plate fins mechanically bonded to seamless copper tubes with all joints brazed Copper copper and vinyl coated construction available as option Tube sheet openings shall be belled to prevent tube wear Heating Section 1 Induced draft combustion type with energy saving direct spark ignition system and redundant main gas valve 2 nduced draft motors shall be provided with solid state hall effect sensor to ensure adequate airflow for combustion 3 The heat exchangers shall be constructed of aluminized steel for corrosion resistance 4 Burners shall be of the in shot type constructed of aluminum coated steel 5 Allgas piping and electric power shall enter the unit cabinet at a single location Refrigerant Components Refrigerant expansion shall be of the fixed orifice type Filters Filter section shall consist of field installed throwaway 1 in thick fiberglass filters of commercially available
18. 4 6 4 7 4 6 4 6 4 6 4 7 36 3 39 3 38 2 44 2 38 7 40 8 45 0 27 5 28 9 22 9 35 7 29 5 24 3 31 8 33 5 25 8 5 0 5 1 5 1 5 1 5 0 5 1 5 1 5 1 5 1 5 1 33 4 39 4 34 6 40 5 34 8 37 5 41 2 26 2 27 6 21 5 33 8 28 2 22 9 35 6 30 2 31 9 24 4 5 6 5 6 5 6 574B060 COOLING PERFORMANCE TABLE Evaporator Air CFM BF Temp F 1500 0 004 1750 0 007 2000 0 01 Outdoor Air Entering Evaporator Air Ewb F Condenser amp ex e e ev e z e or e TC 57 2 58 2 62 4 68 1 58 8 59 7 64 0 69 8 60 0 60 8 64 9 70 8 75 SHC 49 4 47 9 41 6 33 8 53 6 51 8 44 5 35 4 57 6 55 4 47 1 36 8 W 4 1 4 1 4 2 4 2 4 2 4 3 4 3 4 4 4 4 4 4 4 5 4 6 TC 54 7 55 6 59 7 65 2 56 2 57 0 61 1 66 6 57 4 58 1 61 9 67 4 SHC 48 2 46 7 40 4 32 6 52 4 50 5 43 2 34 2 56 3 54 2 45 8 35 6 W 4 5 4 5 4 6 4 7 4 7 4 7 4 8 4 9 4 8 4 9 5 0 5 0 TG 52 2 53 0 56 9 62 0 53 5 54 3 58 0 63 2 55 0 55 3 58 7 64 1 SHC 47 0 45 4 31 4 51 1 49 2 41 9 32 9 55 0 52 9 44 5 34 4 W 5 0 5 0 5 1 5 2 5 1 5 2 5 3 5 3 5 2 5 3 5 5 5 5 TC 49 4 53 8 58 7 50 7 54 8 59 6 52 5 52 4 55 4 60 2 SHC 45 7 37 9 49 8 47 9 40 6 31 6 52 5 51 6 43 2 33 0 W 5 5 5 5 6 57 5 7 5 7 5 8 5 9 5 8 5 8 6 0 6 1 TC 46 5 50 5 55 0 48 1 48 3 51 3 49 7 49 7 51 8 57 0 SHC 44 3 48 1 46 6 39 2 30 6 49 7 49 7 41 8 31 7 6 1 6 2 6 3 6 2 6 3 6 4 6 4 6 4 6 4 6 6 6 6 k k k k k T 43 3 46 7 45 2 47 4 46 4 46 4 47 9 52 2 SHC 42 8 34 9 27 8 45 2 37 6 28 9 46 4 46 4 40 2 29 7 kW 6 7 7 0 7 0 7 0 7 2 7 2 LEGEND
19. C unit base Screw Gasketing NOTE A inner flange 1 Gasketing outer flange LEA Wood nailer 2 Flashing field supplied Roofcurb Insulation field supplied Roofing material field supplied Duct work field supplied Cant strip field supplied Provided with roofcurb Roof Curb for Small Cabinet Note A When unit mounting screw is used retainer bracket must also be used Supply opening B x C 44 5 16 1125 5mm Support Insulated deck pan Long Support Return opening B X C Roof Curb Dimensions Side View Gasketing inner flange Screw NOTE A Gasketing outer flange Wood nailer Flashing field supplied Roofcurb Insulation field supplied Roofing material field supplied Duct work field supplied Cant strip field supplied Provided with roofcurb Roof Curb for Large Cabinet Note A When unit mounting screw is used retainer bracket must also be used Insulated Gasket around deck pan outer edge 00076 6 0 8 203 11 279 16 1 2 419 28 3 4 730 ROOF CURB 024 036 CPRFCURBOO7A00 14 856 11 279 16 1 2 419 28 3 4 730 ww CPRFCURB008A00 8 203 16 3 16 411 17 3 8 441 40 1 4 1022 CPRFCURB009A00 14 356 16 3 16 411
20. DE IT MUST BE REPLACED WITH TYPE 90 DEGREE C WIRE OR NORMAL OPERATION ON ITS EQUIVALENT HARDWARE FAILURE OFF 2 SEE PRICE PAGES FOR THERMOSTAT AND SUBBASES ICM FAN ON OFF DELAY MODIFIED FLASH 3 USE 75 DEGREE COPPER CONDUCTORS FOR FIELD INSTALLATION E E ee 4 REPLACE LOW VOLTAGE FUSES WITH NO GREATER THAN 5 AMP FUSES 5 0N MODELS 48GP024 036 HAS LSI AND 152 IN SERIES MOUNTING PANEL ABOVE IGNITION LOCKOUT FAULT 5 FLASHES ON MODELS 486P042 060 HAS LSI ONLY INDOOR BLOWER INDUCER SWITCH FAULT 6 FLASHES ROLLOUT SWITCH FAULT 7 FLASHES INTERNAL CONTROL FAULT 8 FLASHES R TEMPORARY ONE HOUR AUTOMATIC RESET FAULT NOTE 9 9 FLASHES 8 10 BE WIRED IN ACCORDANCE WITH NEC AND LOCAL CODES FS RS PE IDA ERROR CODES 9 THIS CODE INDICATES AN INTERNAL PROCESSOR FAULT THAT WILL RESET ITSELF IN ONE HOUR FAULT CAN BE CAUSED BY STRAY RF GAS SECTION SHALL BE DISPLAYED IN NUMERICAL SEQUENCE SIGNALS IN THE STRUCTURE OR NEARBY THIS IS A UL REQUIREMENT FAULT 486 500258 3 0 01035 00 TYPICAL WIRING SCHEMATIC 208 230 3 60 SHOWN SCHEMATIC 208 230 3 60 C DR FIELD BLK BLK OF 1 BLK SUPPLY 131 i YEL YEL YEL OFM POWER BLU A eu 5n EQUIP_GND FOR 042 060 UNITS ONLY Ar YEL T3 COMP LEGEND SPLICE EQUIP EOUIPMENT 5 TERMINAL MARKED Fs FLAME SENSOR TERMINAL UNMARKED e
21. HIGH PRESSURE SWITCH psig Cutout 610 15 Reset Auto 420 25 LOSS OF CHARGE LOW PRESSURE SWITCH Liquid Line psig Cutout Reset Auto RETURN AIR FILTERS in Throwawayt 24 x 30 x 1 24 x 30x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1 24 x 30 x 1 t Required filter sizes shown are based on the larger of the ARI Air Conditioning amp Refrigeration Institute rated cooling air flow or the heating airflow velocity of 300 ft min for throwaway type or 450 ft min for high capacity type Air filter pressure drop for non standard filters must not exceed 0 08 in wg Based on altitude of 0 to 2000 ft OPTIONS AND ACCESSORIES Factory installed options Coil options include Tin Plated indoor hairpins copper copper and vinyl coated construction for refrigerant coils Units are shipped standard with copper tube aluminum fin construction See model number nomenclature for coil options Tin Plated indoor coils are built with special hairpins that are de signed to resist both general pitting corrosion and excessive in door corrosion Formicary Corrosion Field installed accessories Economizer with Solid State Controls and Barometric Relief Dampers Manual Air Damper 25 open Roof Curbs 8 in and 14 in Square to Round Duct Transition Kit Thermostats Crankcase Heater Compressor Hard Start Kit for use on single phase units only LP Conversion Kit High Altitude Kit Low Ambient Kit Motormaster Control Solid
22. Heating amp Cooling Systems COOLING UNITS oINGLE PACKAGED GAS HEATING ELECTRIC Model 574B Sizes 024 060 2 to 5 Nominal Tons Puron the environmentally sound refrigerant ty 574 Single Packaged Rooftop Products with Energy Saving tures and refrigerant Direct Spark Ignition Low Sound Levels Up to 81 AFUE e 13 SEER e Variable Speed Blower Standard Factory Installed TXV FEATURES BENEFITS One piece heating and cooling units with low sound levels easy installation low maintenance and dependable performance Puron Environmentally Sound Refrigerant is Bryant s unique refrigerant designed to help protect the environment Puron is an HFC refrigerant which does not contain chlorine that can harm the ozone layer The most important advantage of Puron refrigerant is that it has not been banned in future air con ditioning systems as the traditional refrigerant R 22 has been Puron refrigerant is in service in thousands of systems proving highly reliable environmentally sound performance Perfect Heat Perfect Humidity featuring Variable Speed Blower motors provides better comfort and energy efficiency You can expect up to 30 times better dehumidification economi cal constant fan for less than 50 a year which provides improved indoor air quality and more even temperatures from room to room and reduced indoor noise due to l
23. UTLET Y 2 MIN Ductwork Secure downflow discharge ductwork to roof curb For horizontal discharge applications attach ductwork to unit with flanges To convert a unit to downflow discharge Units are equipped with factory installed inserts in the down flow openings Removal of the inserts is similar to removing an electrical knock out The unit is factory equipped with duct covers to seal the horizontal discharge openings in the unit Units installed in horizontal discharge orientation do not require duct covers Maximum cooling airflow To minimize the possibility of condensate blow off from the evaporator airflow through the units should not exceed 450 cfm per ton Minimum cooling airflow The minimum cooling airflow is 350 cfm per ton Minimum cooling ambient operating temperature All standard units have a minimum cooling ambient operating temperature of 55 F With accessory low ambient temperature kit units can operate at temperatures down to O F Maximum operating outdoor air temperature for cooling is 125 F 20 ELECTRICAL DATA 574B STANDARD ELECTRICAL DATA RLA LRA F MCA OR BKR 5 0 5 5 22 0 22 0 30 30 30 30 35 35 30 30 45 45 35 35 45 45 35 35 60 60 40 40 EXAMPLE Supply voltage is 460 3 60 AB 452 v LEGEND LI BC 464 v FLA Full Load Amps C L US AC 455 v LRA Locked Rotor Amps _ 452 464 455 Minimum Circuit Amps Average voltage LN
24. VICE PORT 0 91 355 8 2st 355 8 34 14 01 13 49 14 01 io RETURN SUPPLY OPTIONAL SUPPLY OPTIONAL AIR OPEN ING RETURN AIR OPENING 173 5 6 83 COND COIL X TOP VIEW C99074 REQUIRED CLEARANCE TO COMBUSTIBLE MATL in mm u u 14 00 355 6 DUCT SIDE OF UNIT 2 00 50 8 SIDE OPPOSITE 14 00 355 6 BOTTOM OF UNIT mt 0 50 12 7 FLUE PANEL RC Te EENEN Ek aan 36 00 914 4 NEC REQUIRED CLEARANCES MILLIMETERS IN BETWEEN UNITS POWER ENTRY SIDE 42 00 1066 8 UNIT AND UNGROUNDED SURFACES POWER ENTRY SIDE 36 00 914 0 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES POWER ENTRY SIDE 42 00 1066 8 15 4 4 54 28 6 1 13 DIA POWER ENTRY 22 2 0 88 DIA HOLE CONTROL ENTRY 123 0 4 84 506 620 2 19 93 24 42 7 391 1 363 1 14 32 1 46 8 68 COMPRESSOR BLOWER GAS SECTION TR 12 1 0 50 N P T 4 amp ELECTRICAL ACCESS PANEL ss GAS ENTRY 25 2 2 08 0 20 1226 3 142 4 1123 1 leata 48 28 5 61 44 22 LEFT SIDE VIEW FRONT VIEW RIGHT SIDE VIEW ELECTRICAL CHARACTERISTICS UNIT 208 230 1 60 574B042060 090 208 230 3 60 208 230 1 60 574 048090 115 130 2 463 208 230 1 60 10 ACCESSORY DIMENSIONS HVA
25. Y C CONTACTOR LPS LOW PRESSURE SWITCH PL4 3 CAP CAPACITOR LS LIMIT SWITCH 0 45 T 1 45 230V GRN YEL COMP COMPRESSOR MOTOR 0 GAS VALVE op W BR W BLK 200 30 VIO e COMBUSTION RELAY Oi T ENERGIZED DE ENERGIZED RS ROLLOUT SWITCH ARAA TRAN TRANSFORMER YEL DM CAP 3 TRANI BRN gt GRN YEL SECONDARY RED 24V Ox BRN BRN TO FIELD a SPLICE CM x 24V SPLICE BOX BR ICM BOARD SN I L2 MR LN SEC RED id Lo ORN lt 00 TO SECI PL WH T PL2 1 L 5 SEE NOTE 5 JI RED HALEU PL2 2 BL RS PL2 3 BL WH TQ IMR 151 152 Vi 071 REP d os MGV WHT GRA 2 FLAME SEN PRN Y Y2 EM YEL TRAN FS x 23 is PL2 T GRN YEL mu GRN EN BRN TO TRANS ORN TO CONT PL2 9 GROUNDED UE BRNS THRU STANDOFF BRN m GE BRN SECI FIELD THERMOSTAT BRN BLK BLK BLU BLU ipsa gt gt T ORN BRN C IGC COMMON 3132 xT atk me 4 gt gt WHT 5 6 B FESSES T Rep 0 PLI 9 BRN W 10 gt ORN B UNIT COMPONENT ARRANGEMENT Hit sp PE gpa B OUTDOOR FAN SECTION ORN TYPE ORN 0 G BLU BLU V V COMPRESSOR INDOOR FAN I vig pul TRAN SECTION SECTION T ED WHT DELAY WHT DISCONNECT NOTES PER NEC L IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED REOR MO
26. ce and installation The unit base with integrated drain pan provides easy ground lev el installation with or without a mounting pad Convenient rigging holds are provided to manipulate the unit on the jobsite A nesting feature ensures a positive unit base to roof curb seal when the unit is roof mounted A convenient 3 4 in wide perimeter flange makes frame mounting on a rooftop easy Standard metal duct covers with insulation come with the unit and cover the horizontal duct openings These can be left in place if the units are converted to downflow Downflow operation is easily provided in the field to allow ver tical ductwork connections The basepan utilizes knockout style seals on the bottom openings to ensure a positive seal in the horizontal airflow mode Integrated Gas Control IGC board provides safe and efficient control of heating and simplifies trouble shooting through its built in diagnostic function Cabinets are constructed of heavy duty phosphated zinc coated prepainted steel capable of withstanding 500 hours in salt spray Interior surfaces of the evaporator heat exchanger compartment are insulated with cleanable semi rigid insulation board which keeps the conditioned air from being affected by the outdoor ambient temperature and provides improved indoor air quality Conforms to American Society of Heating Refriger ation and Air Conditioning Engineers No 62P The sloped drain pan minimizes standing water in the
27. d adhesives shall meet NFPA 90A requirements for flame spread and smoke generation Cabinet insulation shall meet ASHRAE Standard 62P 1 08 DELIVERY STORAGE AND HANDLING Unit shall be stored and handled per manufacturer s recommendations PART 2 PRODUCTS 2 01 EQUIPMENT A General Factory assembled single piece heating and cooling unit Contained within the enclosure shall be all factory wiring piping controls refrigerant charge with R 410A refrigerant and special features required prior to field start up Unit Cabinet 1 Unit Cabinet shall be constructed of phosphated zinc coated pre painted steel capable of with standing 500 hours in salt spray 2 Normal service shall be through a single removable cabinet panel 3 The unit shall be constructed on a rust proof unit base that has an externally trapped integrated sloped drain pan 4 Evaporator fan compartment top surface shall be insulated with a minimum 1 2 thick flexible fiberglass insulation coated on the air side and retained by adhesive and mechanical means The evaporator wall sections will be insulated with a minimum semi rigid foil faced board capable of being wiped clean Aluminum foil faced fiberglass insulation shall be used in the entire indoor air cavity section 5 Unit shall have a field supplied condensate trap C Fans 1 The evaporator fan shall be direct drive variable speed motor and control 2 Fan wheel shall be made
28. drain which is provided with an external drain fitting Louvered Grille provides hail and vandalism protection MODEL NUMBER NOMENCLATURE 574B N W 024 040 Model Number 574B Single Packaged Gas Heating Electric Cooling Electrical Supply N 208 230 1 60 P 208 230 3 60 Fuel W Natural Gas P Propane Gas Nominal Cooling Capacity 024 2 ton 030 2 5 ton not yet available 036 3 ton 042 3 5 ton not yet available 048 4 ton 060 5 ton LEGEND CU Copper AL Aluminum N VS Options AL evap vinyl condens AL evap CU condens CU evap amp condens O O TP Base unit with tin plated indoor coil hair pins TV TP with vinyl coating on outdoor coil TP with AL indoor coil and CU CU outdoor coil Only used if ordering an option TC Low NO Indicator N Low NO Unit Only used if ordering NO units Heat Input Size 040 40 000 060 60 000 090 90 000 115 115 000 130 130 000 ARI CAPACITIES COOLING CAPACITIES AND EFFICIENCIES UNIT 574B 2 030040 036060 042060 042090 048090 048115 048130 060090 060115 060130 LEGEND NOTES dB Decibels 1 Ratings are net values reflecting the effects of circulating fan heat db Dry Bulb Ratings are based on SEER Seasonal Energy Efficiency Ratio Cooling Standard 80 F db 67 F wb indoor entering air tempera wb W
29. e To Round Duct Transitions 024 048 Shall have the ability to convert the supply and return openings from rectangular to round Compressor Protection Time Guard II Kit Solid state control shall protect compressor by prevent ing short cycling Crankcase Heater Shall provide anti floodback protection for low load cooling applications High Altitude Kit Shall consist of natural gas orifices to compensate for gas heat operation at 2001 to 6000 ft above sea level Low NO Natural Gas only option Shall provide NO reduction to values below 40 nano grams joule to meet California emission requirements Compressor Hard Start Kit Shall provide additional starting torque for single phase compressors Single phase only Rigging kit includes rigging brackets which are inserted into the unit base rigging holds to rig unit for rooftop ap plications SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE UNIT MUST BE INSTALLED IN ACCORDANCE WITH INSTALLATION INSTRUCTIONS Cancels NEW Form PDS 574B 24 1 PRINTED IN U S A Catalog No 5257 400 8 03
30. els meet the California maximum oxides of ni trogen NOx emissions requirement of 40 nanograms joule or less as shipped from the factory and MUST be installed in Cali fornia Air Quality Management Districts where a Low NOx rule exists DURABLE DEPENDABLE COMPONENTS Compressors are designed for high efficiency Each compres sor is hermetically sealed against contamination to help promote longer life and dependable operation Each compressor also has vibration isolation to provide quieter operation All compressors have internal high pressure and overcurrent protection Monoport inshot burners produce precise air to gas mixture which provides for clean and efficient combustion The large monoport on the inshot or injection type burners seldom if ever requires cleaning All gas furnace components are acces sible in one compartment Turbo tubular heat exchangers are constructed of alumi nized steel for corrosion resistance and optimum heat transfer for improved efficiency The tubular design permits hot gases to make multiple passes across the path of the supply air In addition dimples located on the heat exchanger walls force the hot gases to stay in close contact with the walls improving heat transfer Direct drive variable speed ECM blower motor is standard on all 574B models Direct drive PSC condenser fan motors are designed to help reduce energy consumption and provide for cooling operation down to 55 F outdoor temperat
31. er Net Cooling Capacities table at condenser entering temperature of 95 F Unit 036 at 1225 cfm and 67 ewb entering wet bulb will provide a total capacity of 36 500 Btuh and a SHC of 27 600 Btuh Calculate SHC correction if required using Note 4 under Cooling Capacities tables SELECT HEATING CAPACITY OF UNIT TO PROVIDE DESIGN CONDITION REQUIREMENT In the Heating Capacities and Efficiencies table on page 4 note that the unit 036090 will provide 70 000 Btuh with an input of 90 000 Btuh 12 IV DETERMINE FAN SPEED AND POWER REQUIRE V MENTS AT DESIGN CONDITIONS Before entering the air delivery tables calculate the total static pressure required From the given example the Wet Coil Pressure Drop Table and the Filter Pressure Drop table on page 16 find at 1200 cfm Wet Coil Pressure Drop 0 032 in ws External Static Pressure 0 2 in wg Filter Pressure Drop 0 13 in wg Total Static Pressure 0 362 in wg Enter the table for Dry Coil Air Delivery Horizontal and Downflow Discharge At 0 362 ESP external static pressure the fan will deliver 1235 cfm with the NOM Speed pin selected SELECT UNIT THAT CORRESPONDS TO POWER SOURCE AVAILABLE The Electrical Data table shows that the unit is designed to operate at 208 230 1 60 PERFORMANCE DATA STANDARD INDOOR ECM MOTOR COOLING CAPACITIES 574B024 COOLING PERFORMANCE TABLE Evaporator Air Temp F 800 0 026 900 0 032 1000 0 04 Outdoor Air
32. et Bulb ture and 95 F db outdoor entering air temperature Air Conditioning amp Refrigeration Institute 2 Before purchasing this appliance read important energy cost and T Rated in accordance with U S Government DOE Department of efficiency information available from your retailer Energy test procedures and or ARI Standard 210 240 89 conditions 80 F db 67 F wb Indoor and 95 F db outdoor Tested in accordance with ARI Standard 270 95 not listed in ARI TABLE OF CONTENTS Page Features Benefils 1 2 Model Number Nomenclature 2 ARI Capacities 3 4 PAVICA tes etre on ce 5 6 Options and 7 8 Base Unit 9 10 Accessory 11 Selection 12 13 18 Typical Piping and Wiring 19 Application ite Ro 20 Electrical cu 21 Typical Wiring 22 23 PR NTC 24 Guide Specifications 27 28 ARI CAPACITIES cont HEATING CAPACITIES AND EFFICIENCIES
33. ntrol IGC The evaporator fan motor is energized 45 seconds after flame is es tablished When the thermostat is satisfied and W is de energized the burners stop firing and the evaporator fan motor shuts off after a 45 second time off delay Cooling When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat the thermostat completes the circuit between thermostat terminal R to terminals Y and G These completed circuits through the ther mostat connect contactor coil C through unit wire Y and blow er relay coil BR through unit wire G across the 24 v secondary of transformer TRAN The normally open contacts of energized contactor C close and complete the circuit through compressor motor COMP to con denser outdoor fan motor OFM Both motors start instantly The indoor blower will cycle on and off with a call for cooling per the on off delay profile selected on the easy select circuit board NOTE Once the compressor has started and then has stopped it should not be started again until 5 minutes have elapsed The cooling cycle remains on until the room temperature drops to a point that is slightly below the cooling control setting of the room thermostat At this point the thermostat breaks the circuit between thermostat terminal R to terminals Y and G These open circuits de energize contactor coil C and relay coil BR The condenser and compressor motors s
34. or use at 2001 to 6000 ft above sea level Kit consists of natural gas orifices that compensate for gas heat operation at high altitude LP to natural gas conversion kit allows conversion back to natural gas Lifting kit includes rigging brackets which are inserted into the unit base rigging holds to rig unit for rooftop applications Economizer FILTER ECONOMIZER CAULK BOTTOM CORNER OF ECONOMIZER ON EACH SIDE FILTER ECONOMIZER BASE gt a u FLANGE _ DETAIL ON BASE A99314 Filter Rack BEND FLANGE AT 90 SCREW TO DIVIDER WITH 1 IN SCREW TOP FILTER RACK EVAPORATOR COIL BOTTOM FILTER RACK A99316 FILTER ACCESS DOOR HORIZONTAL APPLICATION ONLY DO NOT REMOVE FROM DOWNFLOW DISCHARGE REPLACEMENT PANEL HOLE FOR ECONOMIZER WIRING HARDNESS HINGED FILTER ACCESS DOOR INSTALL FILTER ACCESS DOOR STICKER FILTER A99315 Manual Outside Air Damper REPLACEMENT PANEL MANUAL OUTSIDE D AIR HOO DAMPER BLADE BASE UNIT DIMENSIONS 574 024 036 RETURN DUCT OPENING SUPPLY DUCT OPENING 249 6 9 83 249 6 9 83 550 5 21 61 REAR VIEW REQD CLEARANCES FOR OPERATION AND SERVICING in mm Evaporator coil access side 36 914 Power entry side except for NEC requirements 36 914 TOD ou Sous eL B S wo 2 48 1219 Side opposite ducts
35. ower air velocity In addition you ll realize improved installation flexibility with 3 different airflow choices for best overall comfort Low NOx Models Available EASY INSTALLATION Factory assembled package is a com pact fully self contained combination gas heating electric cool ing unit that is pre wired pre piped and pre charged for minimum installation expense These units are available in a variety of standard and optional heating cooling size combinations with voltage options to meet residential and light commercial requirements Units are light weight and install easily on a rooftop or at ground level The high tech composite unit base eliminates rust problems associated with ground level applications CONVERTIBLE DUCT CONFIGURATION Unit is designed for easy use in either downflow or horizontal applications Each unit is easily converted from horizontal to downflow EFFICIENT OPERATION High efficiency design offers SEER Seasonal Energy Effi ciency Ratios of 13 0 and AFUE Annual Fuel Utilization Effi ciency ratings as high as 81 Energy saving direct spark ignition saves gas by operating only when the room thermostat calls for heating Standard units are furnished with natural gas controls A low cost field installed kit for propane conversion is available for all units 574B units with in the thirteenth position of model are dedicated Low NOx units designed for California installa tions These mod
36. sizes Controls and Safeties 1 Unit controls shall be complete with a self contained low voltage control circuit 2 Compressors shall incorporate a solid state compressor protector that provides reset capability 3 Unit shall provide high and loss of charge low pressure safety protection J Operating Characteristics 1 Unit shall be capable of starting and running at 125 F ambient outdoor temperature exceeding maximum load criteria of ARI Standard 210 2 Compressor with standard controls shall be capa ble of operation down to 55 F ambient outdoor tem perature 3 Units shall be provided with a selectable option of fan time delay to prevent cold air delivery before the heat exchanger warms up see Easy Select Board 4 Fan off delay for cooling is selected on Easy Select Board GUIDE SPECIFICATIONS continued K Electrical Requirements All unit power wiring shall enter the unit cabinet at a single location L Motors 1 Compressor motors shall be of the refrigerant cooled type with line break thermal and current overload pro tection 2 All fan motors shall have permanently lubricated bear ings and inherent automatic reset thermal overload protection 3 Condenser fan motor shall be totally enclosed M Grille 1 Louvered Grille Louvered grille shall be factory installed to provide hail guard and vandalism protection N Duct Conversion Shall be available with the use of included duct covers
37. top After a 30 second de lay the blower motor stops The unit is in a standby condition waiting for the next call for cooling from the room thermostat The indoor blower operation with a call for fan operation G in cooling mode will perform by the on off delay profile selected on the Easy Select circuit board 24 25 26 GUIDE SPECIFICATIONS PACKAGED GAS HEATING ELECTRIC COOLING UNITS CONSTANT VOLUME APPLICATION HVAC GUIDE SPECIFICATIONS SIZE RANGE 2 TO 5 TONS NOMINAL COOLING 40 000 TO 130 000 BTUH NOMINAL HEATING INPUT BRYANT MODEL NUMBER 574B PART 1 GENERAL 1 01 SYSTEM DESCRIPTION Outdoor rooftop mounted gas heating electric cooling unit utilizing a scroll compressor for cooling duty Unit shall discharge supply air vertically or horizontally as shown on contract drawings Condenser fan coil section shall have a draw thru design with vertical discharge for minimum sound levels 1 02 QUALITY ASSURANCE A F G Unit shall be rated in accordance with ARI Standards 210 240 94 and 270 95 Sound ratings for 270 95 are not listed with ARI Unit shall be designed in accordance with UL Standard 1995 Unit shall be manufactured in a facility registered to ISO 9001 manufacturing quality standard Unit shall be UL listed and certified under Canadian Standards as a total package for safety requirements Roof curb shall be designed to conform to Standards Insulation an
38. ure Motormaster Il low ambient kit is available as a field installed accessory Form No PDS 574B 24 1 Corporate thermostats include the Time Guard II anti short cycle protection circuitry If a non corporate thermostat without anti short cycle protection is used the Time Guard II field in stalled anti short cycle kit is recommended Refrigerant system is designed to provide dependability Liquid filter dryers are used to promote clean unrestricted operation Each unit leaves the factory with a full refrigerant charge Refrig erant service connections make checking operating pressures easier HIGH AND LOW PRESSURE SWITCHES provide added reli ability for the compressor Evaporator and condenser coils are computer designed for optimum heat transfer and cooling efficiency The evaporator coil is fabricated from copper tube and aluminum fins and is lo cated inside the unit for protection against damage The con denser coil is internally mounted on the top tier of the unit Copper fin coils and pre coated fin coils are available from the factory by special order These coils are recommended in appli cations where aluminum fins are likely to be damaged due to corrosion They are ideal for seacoast applications Low sound ratings ensure a quiet indoor and outdoor environ ment with sound ratings as low as 72 dB See page 3 Easy to service cabinets provide easy single panel accessibility to serviceable components during maintenan

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