Bryant 574D----A Installation Instructions Manual Download Page 33

Page: 33 / 60

Integrated
Gas Unit
Controller
(IGC)

Induced Draft
Motor

Rollout
Switch

Mounting
Screw

Burner
Rack

Inducer
Blower
Housing

Flue
Collector
Box

Interface Fan
Board (IFB)

Auto Transformer
fuses used on 460
volt units only.
(Hidden)

Fan Partition
Mounting
Bracket

A09193

Fig. 18 -- Blower Housing and Flue Collector Box

COMPRESSOR
ACCESS PANEL

BLOWER
ACCESS
PANEL

CONTROL
ACCESS
PANEL

A09207

Fig. 19 -- Unit Access Panels

BLOWER

HOUSING

2 SETSCREWS

(HIDDEN)

C99085

Fig. 20 -- Removal of Motor and Blower Wheel

A07680

Fig. 21 -- Burner Rack Removed

Outdoor Fan

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit

components.
Keep the condenser fan free from all obstructions to ensure

proper cooling operation. Never place articles on top of the

unit.

CAUTION

1. Remove 6 screws holding outdoor grille and motor to top

cover.

2. Turn motor/grille assembly upside down on top cover to

expose fan blade.

3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen setscrew and slide fan off

motor shaft.

5. When replacing fan blade, position blade as shown in Fig.

22.

6. Ensure that setscrew engages the flat area on the motor shaft

when tightening.

7. Replace grille.

574D

Summary of Contents for 574D----A

Page 1: ...ation 22 Checking Adjusting Refrigerant Charge 22 Indoor Airflow and Airflow Adjustments 23 Continuous Fan Operation 23 Cooling Sequence of Operation 24 MAINTENANCE 31 34 Air Filter 31 A09034 Fig 1 Unit 574D A Low NOx Model Available Indoor Blower and Motor 31 Induced Draft Combustion Air Blower 32 Flue Gas Passageways 32 Limit Switch 32 Burner Ignition 32 Main Burners 32 Removal of Gas Train 32 O...

Page 2: ...ment Districts or any other regions in North America where a Low NOx rule exists NOTE Low NOx requirements apply only to natural gas installations RECEIVING AND INSTALLATION Step 1 Check Equipment Identify Unit The unit model number and serial number are stamped on the unit information plate Check this information against shipping papers Inspect Shipment Inspect for shipping damage before removing...

Page 3: ...3 A09469 Fig 2 574D A24 36 Unit Dimensions 574D A ...

Page 4: ...4 A09470 Fig 3 574D A42 60 Unit Dimensions 574D A ...

Page 5: ...m B large base IN mm C IN mm D IN mm E IN mm F IN mm G IN mm H IN mm Small or Large CPRFCURB010A00 11 279 10 254 14 356 16 406 47 8 1214 32 4 822 2 7 69 30 6 778 46 1 1170 CPRFCURB011A00 14 356 Large CPRFCURB012A00 11 279 14 356 43 9 1116 42 2 1072 CPRFCURB013A00 14 356 Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units The cross supports must be located...

Page 6: ... runoff levels Do not use unit if it has been under water Step 5 Rig and Place Unit Rigging and handling of this equipment can be hazardous for many reasons due to the installation location roofs elevated structures etc Only trained qualified crane operators and ground support staff should handle and install this equipment When working with this equipment observe precautions in the literature on t...

Page 7: ...DETAIL A VOIR DÉTAIL A MINIMUM HEIGHT 36 914 4 mm HAUTEUR MINIMUM UNIT HEIGHT HAUTEUR D UNITÉ SEE DETAIL A VOIR DÉTAIL A BANDE SCELLANT DOIT ÊTRE EN PLACE AVANT DE PLACER L UNITÉ SUR LA BASE DE TOIT A09051 SMALL CABINET LARGE CABINET Unit 24 30 36 Unit 42 48 60 lb kg lb kg lb kg lb kg lb kg lb kg Rigging Weight 311 141 316 143 326 148 Rigging Weight 420 191 428 194 450 204 For 460 volt units add 1...

Page 8: ...t Unit 574D A UNIT SIZE 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY ton 4 4 4 5 5 5 SHIPPING WEIGHT lb SHIPPING WEIGHT kg 428 194 428 194 428 194 450 204 450 204 450 204 COMPRESSORS Quantity Scroll 1 REFRIGERANT R 410A Quantity lb Quantity kg 6 4 2 9 6 4 2 9 6 4 2 9 10 0 4 5 10 0 4 5 10 0 4 5 REFRIGERANT METERING DEVICE TXV OUTDOOR COIL Rows Fins in Face Area sq ft 1 21 15 5 1 21 15 5 1 2...

Page 9: ...gas supply pipe enters the unit through the access hole provided The gas connection to the unit is made to the 1 2 in 12 7 mm FPT gas inlet on the gas valve Install a gas supply line that runs to the heating section Refer to the NFGC for gas pipe sizing Do not use cast iron pipe It is recommended that a black iron pipe is used Check the local utility for recommendations concerning existing lines S...

Page 10: ...isdiction black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in 51 mm outside furnace casing If codes allow a flexible connector always use a new connector do not use a connector which has previously serviced another gas appliance WARNING 8 Check for gas leaks at the field installed and factory installed gas lines after all piping connections have been completed Use ...

Page 11: ... Electrical Code CSA C22 1 and local electrical codes WARNING UNIT COMPONENT DAMAGE HAZARD Failure to follow this caution may result in damage to the unit being installed 1 Make all electrical connections in accordance with NFPA 70 NEC latest edition and local electrical codes governing such wiring In Canada all electrical connections must be in accordance with CSA standard C22 1 Canadian Electric...

Page 12: ...16 AWG color coded insulated 35_C minimum wires Standard Connection Run the low voltage leads from the thermostat through the inlet hole and into unit low voltage splice box Locate six seven for 3 phase 18 gage wires leaving control box These low voltage connection leads can be identified by the colors red green yellow brown blue and white See Fig 10 A gray wire is standard on 3 phase units for co...

Page 13: ...efully straighten fins with a fin comb FIRE EXPLOSION HAZARD Failure to follow this warning could result in personal injury death or property damage Do not purge gas supply into the combustion chamber Do not use a match or other open flame to check for gas leaks Use a commercially available soap solution made specifically for the detection of leaks to check all connections WARNING 4 Verify the fol...

Page 14: ...ove sea level For installations below 2 000 ft 610 m refer to the unit rating plate For installations above 2 000 ft 610 m multiply the input by on the rating plate by the derate multiplier in Table 3 for correct input rate Table 3 Altitude Derate Multiplier for U S A ALTITUDE FT M PERCENT OF DERATE DERATE MULTIPLIER FACTOR 0 2000 0 610 0 1 00 2001 3000 610 914 8 12 0 90 3001 4000 915 1219 12 16 0...

Page 15: ...ust be between 3 2 and 3 8 IN W C FIRE AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or death and or property damage Unsafe operation of the unit may result if manifold pressure is outside this range WARNING 3 Replace regulator cover screw on gas valve See Fig 13 4 Turn off gas supply to unit Remove manometer from pressure tap and replace pipe plug on gas va...

Page 16: ...16 A09282 Fig 14 208 230 1 60 Connection Wiring Diagram 574D A ...

Page 17: ...17 A09282 Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram 574D A ...

Page 18: ...18 A09264 Fig 15 208 230 3 60 Connection Wiring Diagram 574D A ...

Page 19: ...19 A09264 Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram 574D A ...

Page 20: ...20 A09265 Fig 16 460 3 60 Connection Wiring Diagram 574D A ...

Page 21: ...21 A09265 Fig 16 Cont 460 3 60 Ladder Wiring Diagram 574D A ...

Page 22: ... Switch The function of the rollout switch is to close the main gas valve in the event of flame rollout The switch is located above the main burners When the temperature at the rollout switch reaches the maximum allowable temperature the control circuit trips closing the gas valve and stopping gas flow to the burners The indoor evaporator fan motor IFM and induced draft motor continue to run until...

Page 23: ...ted with each fan speed for a given static pressure Make sure that the speed chosen delivers a temperature rise within the rise range listed on the unit rating plate 2 Remove the current speed tap wire from the GAS HEAT terminal on the interface fan board IFB Fig 17 and place vinyl cap over the connector on the wire 3 Connect the desired speed tap wire to the GAS HEAT terminal on the interface fan...

Page 24: ...rol setting of the thermostat the thermostat completes the circuit between thermostat terminal R to terminals Y and G 2 The normally open contacts of energized contactor C close and complete the circuit through compressor motor COMP to condenser outdoor fan motor OFM Both motors start instantly 3 The set of normally open contacts on the interface fan board IFB are closed which energizes a circuit ...

Page 25: ...25 Table 7 Cooling Charging Chart A08490 574D A ...

Page 26: ...Medium2 Red CFM 941 851 774 684 576 479 Heating Rise oF 32 36 39 44 52 NA NA NA NA Heating Rise oC 18 20 22 25 29 NA NA NA NA Med High1 Orange CFM 1009 917 840 759 667 577 447 Heating Rise oF 30 33 36 40 45 52 NA NA NA Heating Rise oC 17 18 20 22 25 29 NA NA NA High Black CFM 1241 1167 1111 1036 969 881 818 731 640 Heating Rise oF NA NA NA NA 31 34 37 41 47 Heating Rise oC NA NA NA NA 17 19 21 23 ...

Page 27: ... 665 538 451 Heating Rise oF 46 50 54 NA NA NA NA NA NA Heating Rise oC 25 28 30 NA NA NA NA NA NA Medium Red CFM 1088 1023 954 881 800 723 658 563 461 Heating Rise oF 41 43 47 50 NA NA NA NA NA Heating Rise oC 23 24 26 28 NA NA NA NA NA Med High2 Orange CFM 1140 1064 996 915 840 758 687 564 480 Heating Rise oF 39 42 45 49 53 NA NA NA NA Heating Rise oC 22 23 25 27 29 NA NA NA NA High1 Black CFM 1...

Page 28: ... CFM 1345 1282 1235 1194 1140 1095 1027 974 921 Heating Rise oF 33 35 36 37 39 41 43 46 48 Heating Rise oC 18 19 20 21 22 23 24 25 27 Medium Red CFM 1505 1452 1413 1358 1323 1282 1234 1169 1130 Heating Rise oF 30 31 31 33 34 35 36 38 39 Heating Rise oC 16 17 17 18 19 19 20 21 22 Med High2 Orange CFM 1545 1492 1449 1411 1362 1313 1278 1231 1188 Heating Rise oF 29 30 31 31 33 34 35 36 37 Heating Ris...

Page 29: ...ink CFM 1457 1404 1367 1318 1284 1233 1197 1144 1104 Heating Rise oF 60 NA NA NA NA NA NA NA NA Heating Rise oC 33 NA NA NA NA NA NA NA NA Medium2 Red CFM 1736 1695 1642 1601 1553 1512 1465 1427 1381 Heating Rise oF 50 51 53 54 56 57 59 NA NA Heating Rise oC 28 28 29 30 31 32 33 NA NA Med High1 Orange CFM 2149 2111 2062 2026 1980 1945 1905 1864 1793 Heating Rise oF 40 41 42 43 44 45 46 47 48 Heati...

Page 30: ...46 47 48 50 51 52 53 Heating Rise oC 25 25 26 26 27 28 28 29 30 Med High1 Orange CFM 2131 2088 2065 2013 1982 1941 1888 1860 1785 Heating Rise oF 41 42 42 43 44 45 46 47 49 Heating Rise oC 23 23 23 24 24 25 26 26 27 High Black CFM 2461 2409 2339 2286 2192 2140 2062 1968 1874 Heating Rise oF 35 36 37 38 40 41 42 44 46 Heating Rise oC 20 20 21 21 22 23 23 25 26 574D N P E WA60130 35 65 19 36 Low Blu...

Page 31: ...oving panels and parts 3 Never place anything combustible either on or in contact with the unit WARNING UNIT OPERATION HAZARD Failure to follow this caution may result in improper operation Errors made when reconnecting wires may cause improper and dangerous operation Label all wires prior to disconnecting when servicing CAUTION ENVIRONMENTAL HAZARD Failure to follow this caution may result in env...

Page 32: ...ft blower assembly according to directions in the Induced Draft Blower Assembly section 2 Remove the 11 screws holding the flue collector box cover See 19 to the heat exchanger assembly Inspect the heat exchangers 3 Clean all surfaces as required using a wire brush Limit Switch Remove blower access panel see Fig 19 Limit switch is located on the fan partition Burner Ignition Unit is equipped with ...

Page 33: ...680 Fig 21 Burner Rack Removed Outdoor Fan UNIT OPERATION HAZARD Failure to follow this caution may result in damage to unit components Keep the condenser fan free from all obstructions to ensure proper cooling operation Never place articles on top of the unit CAUTION 1 Remove 6 screws holding outdoor grille and motor to top cover 2 Turn motor grille assembly upside down on top cover to expose fan...

Page 34: ... for Refrigerant Leaks section If no refrigerant leaks are found and low cooling performance is suspected refer to the Checking and Adjusting Refrigerant Charge section Gas Input The gas input does not require checking unless improper heating performance is suspected If a problem exists refer to the Start Up section Evaporator Airflow The heating and or cooling airflow does not require checking un...

Page 35: ... oil If additional oil is needed use Uniqema RL32 3MAF If this oil is not available use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC This oil is extremely hygroscopic meaning it absorbs water readily POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants Take all necessary precautions to avoid exposure of the oil to the atmosphere Servicing Systems on Roof...

Page 36: ... oils S Vacuum pumps will not remove moisture from oil S Do not use liquid line filter driers with rated working pressures less than 600 psig S Do not leave Puron suction line filter driers in line longer than 72 hrs S Do not install a suction line filter drier in liquid line S POE oils absorb moisture rapidly Do not expose oil to atmosphere S POE oils may cause damage to certain plastics and roof...

Page 37: ...hown on rating plate Defective compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run start capacitor Determine cause and replace Faulty outdoor fan motor or capacitor Replace Restriction in refrigerant system Locate restriction and remove Compressor operates continuously Dirty air filter Replace f...

Page 38: ...the indoor evaporator fan motor Ensure that the supply air temperature rise is in accordance with the range on the unit nameplate Clean or replace filters Flame sense fault LED 3 flashes The IGC sensed flame that should not be present Reset unit If problem persists replace control board 4 consecutive limit switch faults LED 4 flashes Inadequate airflow to unit Check the operation of the indoor eva...

Page 39: ...THAT UNIT INSTALLATION IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND SETSCREW TIGHTNESS III START UP ELECTRICAL SUPPLY VOLTAGE COMPRESSOR AMPS INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB GAS HEAT SUPPLY AIR PRESSURES GAS INLET PRESSURE IN W C GAS MANIFOLD PRESSURE IN W C REFRIGERANT ...

Page 40: ...XASP00100 or CRCBDIOX005A00 CRENTDIF004A00 accessory is used on many different base units As such these kits may contain parts that will not be needed for installation 33ZCSENCO2 and CGCDXSEN004A00 are accessory CO2 sensors 33ZCASPC02 AND CGCDXASP00100 are accessory aspirator boxes required for duct mounted applications CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 AND 33ZVASPC02 ac...

Page 41: ...r Table 18 Filter Part Number DESCRIPTION PART NUMBER Indoor Coil Air Filter 12 x 20 x 1 304 8 x 508 x 25 4 mm KH01AA312 NOTE The economizer control settings and the filters are accessible through the filter access door 13 Economizer controls are set to a standard factory setting Nevertheless you can adjust these settings through the filter access door Review the settings in the Operation section ...

Page 42: ... Duct Cover Panel Hood Divider Removed A09691 Fig 25 Horizontal Return Duct Cover Panel Removal Filter Angle Bracket Right Hood Side Panel Left Hood Side Panel Filter Angle Bracket A09692 Fig 26 Filter Angle Bracket Installation 574D A ...

Page 43: ...anel Hood Top Panel Left Hood Side Panel Hood Divider A09693 Fig 27 Economizer Hood Assembly A09694 Fig 28 Economizer Hood Installation Filter Clips Aluminum Filter A09695 Fig 29 Filter Installation See Through View 574D A ...

Page 44: ...e and dispose the screw Follow unit s literature for flue hood installations 5 Replace horizontal return duct cover panel Screw in place ensuring all seams are air and watertight 6 Open economizer hood package found on the top skid Mount OAT sensor to its assigned bracket by screwing together with provided two 8 fasteners Afterwards install OAT sensor to the right side hood panel with the provided...

Page 45: ...9698 Fig 32 OAT Bracket Installation Filter Angle Bracket Right Hood Side Panel Filter Angle Bracket Left Hood Side Panel Right Hood Side Left Hood Side A09699 Fig 33 Filter Angle Bracket Installation 574D A ...

Page 46: ...m KH01AA316 18 x 24 x 1 457 2 x 609 5 x 25 4 mm KH01AA318 13 Economizer controls are set to a standard factory setting Nevertheless you can adjust these settings through the filter access door Review the settings in the Operation section 1 The standard economizer controller has a factory setting of C for the outdoor air temperature changeover and 63_F 17_C for the supply air mixed air temperature ...

Page 47: ...should be set to the D position See Fig 40 SUPPLY AIR TEMPERATURE SAT SENSOR The supply air temperature sensor is a 3 KΩ thermistor located at the inlet of the indoor fan See Fig 38 The operating range of temperature measurement is 0_ to 158_F 17 8_ to 70_C See Table 20 for sensor temperature resistance values The temperature sensor looks like an eyelet terminal with wires running to it The sensor...

Page 48: ... the sensor See Fig 40 for the corresponding temperature changeover values EXHAUST FAN SETPOINT LED LIGHTS WHEN EXHAUST CONTACT IS MADE MINIMUM DAMPER POSITION SETTING MAXIMUM DAMPER DEMAND CONTROL VENTILATION SETPOINT LED LIGHTS WHEN DEMAND CONTROL VENTILATION INPUT IS ABOVE SETPOINT DEMAND CONTROL VENTILATION SETPOINT LED LIGHTS WHEN OUTDOOR AIR IS SUITABLE FOR FREE COOLING ENTHALPY CHANGEOVER S...

Page 49: ... there is a call for exhaust the Economizer controller provides a 45 15 second delay before exhaust fanactivation toallow thedampers toopen Thisdelay allows the damper to reach the appropriate position to avoid unnecessary fan overload MINIMUM POSITION CONTROL There is a minimum damper position potentiometer on the Economizer controller See Fig 39 and Fig 45 The minimum damper position maintains t...

Page 50: ...50 A10098 Fig 45 Economizer Wiring Diagram 574D A ...

Page 51: ...51 A10075 Fig 46 Connection Wiring Diagram 230 3 574D A ...

Page 52: ...52 A10075 Fig 46 Cont Ladder Wiring Diagram 230 3 574D A ...

Page 53: ...53 A10087 Fig 47 Connection Wiring Diagram 460 3 574D A ...

Page 54: ...54 A10087 Fig 48 Ladder Wiring Diagram 460 3 574D A ...

Page 55: ...ometer to the correct position The same equation can be used to determine the occupied or maximum ventilation rate to the building For example an output of 3 6 volts to the actuator provides a base ventilation rate of 5 and an output of 6 7 volts provides the maximum ventilation rate of 20 or base plus 15 CFM per person Use Fig 43 to determine the maximum setting of the CO2 sensor For example a 11...

Page 56: ...n free cooling is not available the compressor will be controlled by the thermostat When free cooling is available the outdoor air damper is modulated by the Economizer control to provide a 50_ to 55_F 10_ to 12 8_C supply air temperature into the zone As the supply air temperature fluctuates above 55_ 12 8_C or below 50_F 10_C the dampers will be modulated open or close to bring the supply air te...

Page 57: ...d remain in position 5 Turn the DCV set point potentiometer CW until the DCV LED turns off The DCV LED should turn off when the potentiometer is approximately 9 v The actuator should drive fully closed 6 Turn the DCV and Exhaust potentiometers CCW until the Exhaust LED turns on The exhaust contacts will close 30 to 120 seconds after the Exhaust LED turns on 7 Return Economizer settings and wiring ...

Page 58: ...58 A10064 Fig 49 574D A 30 36 3 Phase with Economizer 574D A ...

Page 59: ...59 A10065 Fig 50 574D A 42 60 3 Phase with Economizer 574D A ...

Page 60: ...hange at any time specifications or designs without notice and without incurring obligations E2010 Bryant Heating Cooling Systems D 7310 W Morris St D Indianapolis IN 46231 Printed in U S A Edition Date 04 10 Replaces II574D 07 Catalog No II574D 08 574D A ...

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