Bryant Legacy 674D Installation Instructions Manual Download Page 55

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REQUIRED CLEARANCES TO COMBUSTIBLE MA

TL.

NEC. REQUIRED CLEARANCES

REQUIRED CLEARANCE FOR OPERA

ION AND SERVICING

A10220

Fig. 51 -- 674D----A 30--36 3 Phase with Economizer

674D

Summary of Contents for Legacy 674D

Page 1: ...on 17 Checking and Adjusting Refrigerant 17 Indoor Airflow and Airflow Adjustments 17 MAINTENANCE 29 34 Air Filter 29 Indoor Blower and Motor 29 Flue Gas Passageways 30 Limit Switch 30 Burner Ignition...

Page 2: ...aximum oxides of nitrogen NOx emissions requirements of 40 nanograms joule or less as shipped from the factory and must be installed in California Air Quality Management Districts or any other regions...

Page 3: ...3 A09473 Fig 2 674D A24 36 Unit Dimensions 674D A...

Page 4: ...4 A09474 Fig 3 674D A42 60 Unit Dimensions 674D A...

Page 5: ...S 1 Roof curb must be set up for unit being installed 2 Seal strip must be applied as required to unit being installed 3 Roof curb is made of 16 gauge steel 4 Attach ductwork to curb flanges of duct r...

Page 6: ...D TAIL A MINIMUM HEIGHT 36 914 4 mm HAUTEUR MINIMUM UNIT HEIGHT HAUTEUR D UNIT SEE DETAIL A VOIR D TAIL A BANDE SCELLANT DOIT TRE EN PLACE AVANT DE PLACER L UNIT SUR LA BASE DE TOIT A09051 RIGGING WEI...

Page 7: ...fting equipment should include but not be limited to the following 1 Application of the lifter to the load and adjustment of the lifts to adapt to various sizes or kinds of loads 2 Instruction in any...

Page 8: ...the gas pressure must not be less than 11 0 IN W C or greater than 13 IN W C at the unit connection A 1 8 in 3 2 mm NPT plugged tapping accessible for test gauge connection must be installed immediate...

Page 9: ...GERANT METERING DEVICE Indoor TXV Outdoor Accurater OUTDOOR ORIFICE in qty mm 0 032 2 81 0 035 2 89 0 037 2 94 0 038 Left 0 040 Right 97 1 02 OUTDOOR COIL Rows Fins in Face Area sq ft 2 21 11 9 2 21 1...

Page 10: ...t exceed 0 08 IN W C If using accessory filter rack refer to filter rack installation instructions for correct filter size and quantity Table 2 Maximum Gas Flow Capacity NOMINAL IRON PIPE SIZE IN INTE...

Page 11: ...FPA 90A or residence type NFPA 90B and or local codes and ordinances Adhere to the following criteria when selecting sizing and installing the duct system 1 Units are shipped for horizontal duct insta...

Page 12: ...s combustion supply air louvers See unit wiring label Fig 14 and 15 and Fig 9 for reference when making high voltage connections Proceed as follows to complete the high voltage connections to the unit...

Page 13: ...hstand a 30 sec overload or shorted secondary condition If an overload or short is present correct overload condition and check for blown fuse on gas control board or Interface Fan Board Replace fuse...

Page 14: ...before the time delay has expired 2 T2 energizes the compressor contactor via the High Pressure Switch HPS and Low Pressure Switch LPS The compressor and outdoor fan start Thermostat G energizes the...

Page 15: ...DERATE MULTIPLIER FACTOR 0 2000 0 610 0 1 00 2001 3000 610 914 8 12 0 90 3001 4000 315 1219 12 16 0 86 4001 5000 1220 1524 16 20 0 82 5001 6000 1524 1829 20 24 0 78 6001 7000 1829 2134 24 28 0 74 7001...

Page 16: ...ormal Operation An LED light emitting diode indicator is provided on the integrated gas unit controller IGC to monitor operation The IGC is located by removing the control access panel see Fig 18 Duri...

Page 17: ...abnormal condition exists somewhere in the cooling system such as insufficient airflow across either coil or both coils CAUTION Proceed as follows 1 Remove caps from low and high pressure service fit...

Page 18: ...wire from the LOW terminal on the interface fan board IFB See Fig 13 2 Determine correct normal cooling fan speed for unit and application Add the wet coil pressure drop in Table 8 to the system stati...

Page 19: ...COLOR EXTERNAL STATIC PRESSURE IN W C 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 674D N P E WA24040 30 60oF 17 33oC Low Blue CFM 754 650 538 429 Heating Rise oF 40 46 56 NA NA NA NA NA NA Heating Rise oC 22...

Page 20: ...3 665 538 451 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 Heat...

Page 21: ...k 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 Heati...

Page 22: ...Pink 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...

Page 23: ...7 48 49 49 51 51 53 Heating Rise oC 25 26 26 26 27 27 28 29 29 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...

Page 24: ...24 A10207C Fig 14 208 230 1 60 Connection Wiring Diagram Unit 674D 674D A...

Page 25: ...25 A10207L Fig 14 Cont 208 230 1 60 Ladder Wiring Diagram Unit 674D A 674D A...

Page 26: ...26 A10208C Fig 15 208 230 3 60 Connection Wiring Diagram Unit 674D A 674D A...

Page 27: ...27 A10208L Fig 15 Cont 208 230 3 60 Ladder Wiring Diagram Unit 674D A 674D A...

Page 28: ...28 A08019 Fig 16 Cooling Charging Table Subcooling 674D A...

Page 29: ...wheel bi monthly to determine proper cleaning frequency 4 Check electrical connections for tightness and controls for proper operation each heating and cooling season Service when necessary Ensure el...

Page 30: ...Table 5 in these instructions for LED interpretation If lockout occurs unit may be reset by either momentarily interrupting power supply to unit or by turning selector switch to OFF position at the t...

Page 31: ...l controls and wiring annually Be sure to turn off the gas supply and then the electrical power to the unit Remove access panels see Fig 18 to locate all the electrical controls and wiring Check all e...

Page 32: ...supply and return air grilles are open and free from obstructions and that the air filter is clean When necessary refer to the Indoor Airflow and Airflow Adjustments section to check the system airfl...

Page 33: ...rigerant The compressor used in this product is specifically designed to operate with Puron R 410A refrigerant and cannot be interchanged The compressor is an electrical as well as mechanical device E...

Page 34: ...s Puron R 410A refrigerant which has higher operating pressures than R 22 and other refrigerants No other refrigerant may be used in this system Gauge set hoses andrecoverysystemmustbe designedto hand...

Page 35: ...dip tube charge Puron units with cylinder in upright position and a commercial metering device in manifold hose Charge refrigerant into suction line TROUBLESHOOTING Use the Troubleshooting Guides See...

Page 36: ...restriction and remove Compressor operates continuously Dirty air filter Replace filter Unit undersized for load Decrease load or increase unit size Thermostat set too low Reset thermostat Low refrig...

Page 37: ...n of 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...

Page 38: ...N 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 C...

Page 39: ...ASP00100 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...

Page 40: ...Table 17 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...

Page 41: ...Duct Cover Panel Hood Divider Removed A09691 Fig 29 Horizontal Return Duct Cover Panel Removal Filter Angle Bracket Right Hood Side Panel Left Hood Side Panel Filter Angle Bracket A09692 Fig 30 Filter...

Page 42: ...nel Hood Top Panel Left Hood Side Panel Hood Divider A09693 Fig 31 Economizer Hood Assembly A09694 Fig 32 Economizer Hood Installation Filter Clips Aluminum Filter A09695 Fig 33 Filter Installation Se...

Page 43: ...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...

Page 44: ...698 Fig 36 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 37 Filter Angle Bracket Installation...

Page 45: ...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 t...

Page 46: ...should be set to the D position See Fig 44 SUPPLY AIR TEMPERATURE SAT SENSOR The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan See Fig 42 The operating range...

Page 47: ...the sensor See Fig 44 for the corresponding temperature changeover values EXHAUST FAN SETPOINT LED LIGHTS WHEN EXHAUST CONTACT IS MADE MINIMUM DAMPER POSITION SETTING MAXIMUM DAMPER DEMAND CONTROL VEN...

Page 48: ...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...

Page 49: ...49 A10059 Fig 49 Economizer Wiring Diagram 674D A...

Page 50: ...Y AIR TEMPERATURE FIELD SUPPLY C F SCHEMATIC 208 230 3 60 1 1 EQUIP_GND C C1 C2 IDM V Y BR G Y CAP 3 QT COMP T1 T2 T3 L2 L2 L2 L1 C J2 W IFO 5AMP G R RS RS LS LS CS CS GV GV C IGC CM BM FS RT Y BR FS...

Page 51: ...BK R R BR P R BK SEE NOTE 4 Y BL FS DB P P DFT Y BL T1 BL T2 O BK BR RVS P3 2 P3 1 C BR P2 1 P2 4 P1 6 W2 P1 5 Y P1 8 O P1 7 R R 1 O Y W W BR FUSE O W IGC IGC Y P2 2 C BR C DB C DB C IFB IFB IF USED C...

Page 52: ...meter 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 ven...

Page 53: ...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...

Page 54: ...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...

Page 55: ...55 REQUIRED CLEARANCES TO COMBUSTIBLE MATL NEC REQUIRED CLEARANCES REQUIRED CLEARANCE FOR OPERATION AND SERVICING A10220 Fig 51 674D A 30 36 3 Phase with Economizer 674D A...

Page 56: ...674D A 42 60 3 Phase with Economizer Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations E2010 Bryant Heati...

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