Bryant Legacy 674D Installation Instructions Manual

13 seer single--packaged hybrid heat dual fuel system with puron (r--410a) refrigerant single and three phase 2--5 nominal tons (sizes 24--60)
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674D
LEGACYt 13 SEER SINGLE- - PACKAGED HYBRID HEAT DUAL FUEL
SYSTEM WITH PURONR (R- - 410A) REFRIGERANT
SINGLE AND THREE PHASE
2- - 5 NOMINAL TONS (SIZES 24- - 60)
NOTE:
Read the entire instruction manual before starting the
installation.
NOTE:
Installer: Make sure the Owner's Manual and Service
Instructions are left with the unit after installation.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS
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Installation Instructions
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SAFETY CONSIDERATIONS
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Installation and servicing of this equipment can be hazardous due
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to mechanical and electrical components. Only trained and
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qualified personnel should install, repair, or service this equipment.
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Untrained personnel can perform basic maintenance functions such
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as cleaning and replacing air filters. All other operations must be
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performed by trained service personnel. When working on this
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equipment, observe precautions in the literature, on tags, and on
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labels attached to or shipped with the unit and other safety
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precautions that may apply.
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Follow all safety codes. Wear safety glasses, protective clothing,
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and work gloves. Have fire extinguisher available. Read these
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instructions thoroughly and follow all warnings or cautions
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included in literature and
building codes, the current editions of the National Fuel Gas Code
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Fig. 1 - - Unit 674D- -- -A
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Summary of Contents for Bryant Legacy 674D

  • Page 1: Table Of Contents

    674D LEGACYt 13 SEER SINGLE- - PACKAGED HYBRID HEAT DUAL FUEL SYSTEM WITH PURONR (R- - 410A) REFRIGERANT SINGLE AND THREE PHASE 2- - 5 NOMINAL TONS (SIZES 24- - 60) Installation Instructions NOTE: Read the entire instruction manual before starting the installation.
  • Page 2: Introduction

    (NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code (NOx) emissions requirements of 40 nanograms/joule or less as (NEC) NFPA 70. shipped from the factory and must be installed in California Air Quality Management Districts or any other regions in North In Canada refer to the current editions of the National Standards of America where a Low NOx rule exists.
  • Page 3 A09473 Fig. 2 - - 674D- -- -A24- -36 Unit Dimensions...
  • Page 4 A09474 Fig. 3 - - 674D- -- -A42- -60 Unit Dimensions...
  • Page 5 HVAC unit HVAC unit basepan base rails Sealing Gasket Roofcurb Anchor screw Wood nailer* Flashing field supplied Roofcurb* Insulation (field supplied) Roofing material field supplied Cant strip field supplied SMALL CURB A09418 *Provided with roofcurb A09090 ROOF CURB DETAIL LARGE CURB A09415 A09419 CATALOG...
  • Page 6 CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR ACCESS PANELS MUST BE IN PLACE WHEN RIGGING. PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION. Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition DUCTS MINIMUM HEIGHT: 36"...
  • Page 7: Slab Mount

    SLAB MOUNT 3. Condition of the load as it relates to operation of the lifting kit, such as balance, temperature, etc. Place the unit on a solid, level concrete pad that is a minimum of 4 in. (102 mm) thick with 2 in. (51 mm) above grade. The slab Follow all applicable safety codes.
  • Page 8: Install Flue Hood

    Pitch the drain tube downward at a slope of at least 1- -in. (25 mm) local utility for recommendations concerning existing lines. Size for every 10 ft (3 m) of horizontal run. Be sure to check the drain gas supply piping for 0.5 IN. W.C. maximum pressure drop. Never tube for leaks.
  • Page 9 been completed. Use a commercially available soap solution WARNING made specifically for the detection of leaks (or method specified by local codes and/or regulations). FIRE OR EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. - -Connect gas pipe to unit using a backup wrench to avoid damaging gas controls.
  • Page 10 Table 1 - - Physical Data - - Unit 674D- -- -A (Cont’d) UNIT SIZE 674D --- --- A 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY --- ton OPERATING WEIGHT--- lb (kg) COMPRESSORS Scroll Quantity REFRIGERANT (R --- 410A) Quantity --- lb 12.3 (kg )
  • Page 11: Install Duct Connections

    Step 9 — Install Duct Connections 4. All units must have field- -supplied filters or accessory filter rack installed in the return- -air side of the unit. The unit has duct flanges on the supply- - and return- -air openings Recommended sizes for filters are shown in Table 1.
  • Page 12: Install Electrical Connections

    Step 10 — Install Electrical Connections Single phase units: 1. Run the high- -voltage (L1, L2) and ground lead into the WARNING control box. 2. Connect ground lead to chassis ground connection. ELECTRICAL SHOCK HAZARD 3. Locate the black and yellow wires connected to the line side of the contactor.
  • Page 13: Balance Point Setting Thermidistat Or Hybrid Heat

    PRE- -START- -UP HIGH VOLTAGE WARNING POWER LEADS POWER (SEE UNIT WIRING SUPPLY LABEL) FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, EQUIP GR death or property damage. FIELD-SUPPLIED FUSED DISCONNECT 1. Follow recognized safety practices and wear protective CONTROL BOX goggles when checking or servicing refrigerant system.
  • Page 14: Check For Refrigerant Leaks

    4. Verify the following conditions: de- -energized. The evaporator motor is de- -ener- gized after a 90 sec. delay. a. Make sure gas line is free of air. Before lighting the unit for the first time, perform the following with the gas d.
  • Page 15: Checking Heating Control

    Table 4 – Altitude Derate Multiplier for U.S.A.* BURNER FLAME DERATE MULTIPLIER ALTITUDE FT (M) PERCENT OF DERATE FACTOR{ 0--- 2000 BURNER 1.00 (0--- 610) 2001--- 3000* 8--- 12 0.90 (610--- 914) 3001--- 4000 12--- 16 0.86 (315--- 1219) 4001--- 5000 16--- 20 0.82 (1220--- 1524)
  • Page 16: Check Burner Flame

    4. Divide number of seconds in Step 3 into 3600 (number of the same for each burner. Propane will have blue flame (See Fig. seconds in one hr). 11). Refer to the Maintenance section for information on burner removal. 5. Multiply result of Step 4 by the number of cubic feet (cu ft) Normal Operation shown for one revolution of test dial to obtain cubic feet (cu ft) of gas flow per hour.
  • Page 17: Start- -Up Cooling And Make Adjustments

    Step 4 — Start- -up Cooling and Make Adjust- Proceed as follows: ments 1. Remove caps from low- - and high- -pressure service fittings. 2. Using hoses with valve core depressors, attach low- - and Complete the required procedures given in the Pre- -Start- -Up high- -pressure gauge hoses to low- - and high- -pressure section before starting the unit.
  • Page 18 Gas Heating Fan Speed Set-up 5. Remove the vinyl cap off of the desired speed tap wire (Refer to Table 6 for color coding) for the dehumidification To change the gas heating speed: cooling fan speed and place desired speed tap wire on the 1.
  • Page 19 Table 7 – Filter Pressure Drop Table (IN. W.C.) FILTER SIZE in. (mm) 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — —...
  • Page 20 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 674D- -- -A24- -60 HEATING MOTOR WIRE EXTERNAL STATIC PRESSURE (IN. W.C.) UNIT RISE RANGE SPEED COLOR --- --- --- --- --- --- --- --- --- --- Heating...
  • Page 21 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 674D- -- -A24- -60 HEATING MOTOR WIRE EXTERNAL STATIC PRESSURE (IN. W.C.) UNIT RISE RANGE SPEED COLOR 1234 1168 1093 1021 Heating Blue Rise ( Heating...
  • Page 22 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 674D- -- -A24- -60 HEATING MOTOR WIRE EXTERNAL STATIC PRESSURE (IN. W.C.) UNIT RISE RANGE SPEED COLOR 1402 1351 1311 1263 1224 1172 1136 1080...
  • Page 23 Table 10 (cont) - - Dry Coil Air Delivery* - - Horizontal and Downflow Discharge - - Unit 674D- -- -A24- -60 HEATING MOTOR WIRE EXTERNAL STATIC PRESSURE (IN. W.C.) UNIT RISE RANGE SPEED COLOR 1445 1389 1341 1281 1236 1189 1139 1072...
  • Page 24 A10207C Fig. 14 - - 208/230- -1- -60 Connection Wiring Diagram, Unit 674D...
  • Page 25 A10207L Fig. 14 Cont - - 208/230- -1- -60 Ladder Wiring Diagram, Unit 674D- -- -A...
  • Page 26 A10208C Fig. 15 - - 208/230- -3- -60 Connection Wiring Diagram, Unit 674D- -- -A...
  • Page 27 A10208L Fig. 15 Cont. - - 208/230- -3- -60 Ladder Wiring Diagram, Unit 674D- -- -A...
  • Page 28 A08019 Fig. 16 - - Cooling Charging Table- -Subcooling...
  • Page 29: Maintenance

    MAINTENANCE 3. Inspect blower motor and wheel for cleanliness at the beginning of each heating and cooling season. Clean when To ensure continuing high performance and to minimize the necessary. For first heating and cooling season, inspect possibility of premature equipment failure, periodic maintenance blower wheel bi- -monthly to determine proper cleaning must be performed on this equipment.
  • Page 30: Flue Gas Passageways

    f. Connect 5 pin plug and 4 pin plug to indoor blower 1. Remove the induced draft blower assembly according to motor. directions in the Induced Draft Blower Assembly section. g. Reinstall blower access panel (see Fig. 18). 2. Remove the 11 screws holding the flue collector box cover (See Fig.
  • Page 31: Outdoor Fan

    BLOWER HOUSING 2 SETSCREWS A07680 (HIDDEN) Fig. 22 - - Burner Rack Removed Outdoor Fan CAUTION UNIT OPERATION HAZARD C99085 Failure to follow this caution may result in damage to unit Fig. 19 - - Removal of Motor and Blower Wheel components.
  • Page 32: Gas Input

    Speedup Quiet Defrost interval Pins Shift DIP switches A08020 Fig. 23 - - Defrost Control the Indoor Airflow and Airflow Adjustments section to check the WARNING system airflow. Check Defrost Thermostat EXPLOSION, PERSONAL INJURY The defrost thermostat is usually located on the lowest liquid ENVIRONMENTAL HAZARD leaving circuit of the left condenser coil (see Fig.
  • Page 33 C99097 Fig. 24 - - Refrigerant Circuit 2. Disconnect leads on switch. The compressor is an electrical (as well as mechanical) device. Exercise extreme caution when working near compressors. Power 3. Apply ohm meter leads across switch. You should have should be shut off, if possible, for most troubleshooting techniques.
  • Page 34 INDOOR COIL OUTDOOR COIL TXV in Metering Position HP S Bypass LEGEND Position HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater Metering De vice ® Arrow indicates direction of flo w C03011 Fig. 25 - - Typical Heat Pump Operation, Cooling Mode INDOOR COIL OUTDOOR COIL TXV in Bypass...
  • Page 35: Troubleshooting

    Servicing Systems on Roofs and with Synthetic materials Liquid Line Filter Drier POE (polyolester) compressor lubricants are known to cause long This filter drier is specifically designed to operate with Puron. Use term damage to some synthetic roofing materials. only factory- -authorized components. Filter drier must be replaced whenever the refrigerant system is opened.
  • Page 36 Table 11 – Troubleshooting Guide - - Cooling or Heat Pump Heating Mode SYMPTOM CAUSE REMEDY Power Failure Call power company. Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or control Compressor and Outdoor fan will not Replace component.
  • Page 37 Table 12 – Troubleshooting Guide–Heating SYMPTOM CAUSE REMEDY Water in gas line Drain. Install drip leg. No power to furnace Check power supply fuses, wiring or circuit breaker. Check transformer. No 24--v power supply to control circuit NOTE: Some transformers have internal over--current protection that requires a cool--down period to reset.
  • Page 38 START- -UP CHECKLIST (Remove and Store in Job Files) I. PRELIMINARY INFORMATION MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: II. PRESTART- -UP (Insert check mark in box as each item is completed) ( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT ( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS ( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS ( ) CHECK GAS PIPING FOR LEAKS (WHERE APPLICABLE)
  • Page 39: Vertical Economizer

    VERTICAL ECONOMIZER ACCESSORIES (FACTORY INSTALLED OPTION) The economizer has several field- -installed accessories available to optimize performance. Refer to Table 16 for authorized parts. GENERAL Economizers are recommended for only commercial packaged Table 16 – Accessory List products that have X13 motors. The Economizer system utilizes DESCRIPTION PART NUMBER the latest technology available for integrating the use of free...
  • Page 40 6. Replace horizontal return duct cover panel. Screw in place ensuring all seams are air and watertight. 7. Install the 2 angle filter brackets to the right and left hood side panels respectively with the #10 screws provided. See Fig. 30. 8.
  • Page 41 Hood Divider (Removed) Hood Divider Horizontal Return Duct Cover Panel A09691 Fig. 29 - - Horizontal Return Duct Cover Panel Removal Right Hood Left Hood Side Panel Side Panel Filter Angle Bracket Filter Angle Bracket A09692 Fig. 30 - - Filter Angle Bracket Installation...
  • Page 42 Hood Top Panel Right Hood Side Panel Hood Divider Left Hood Side Panel A09693 Fig. 31 - - Economizer Hood Assembly Filter Clips Aluminum Filter A09694 Fig. 32 - - Economizer Hood Installation A09695 Fig. 33 - - Filter Installation (See Through View)
  • Page 43: Large Chassis

    Large Chassis 7. Install the 2 angle filter brackets to the right and left hood side panels respectively with the #10 screws provided. See To install the Vertical Economizer on the large chassis perform the Fig. 37. following procedure: 8. Assemble hood according to Fig. 38 screwing together with 1.
  • Page 44 A09698 Fig. 36 - - OAT Bracket Installation Left Hood Side Panel Filter Angle Bracket Right Hood Side Panel Filter Angle Bracket Left Hood Side Right Hood Side A09699 Fig. 37 - - Filter Angle Bracket Installation...
  • Page 45 Right Hood Side Panel Hood Top Panel Left Hood Side Panel Hood Divider A09700 Fig. 38 - - Hood Assembly NOTE: The economizer control settings and the filters are accessible through the filter access door. Table 18 – Filter Part Number DESCRIPTION PART NUMBER 14 x 24 x 1...
  • Page 46: Configuration

    CONFIGURATION Economizer Standard Sensors OUTDOOR AIR TEMPERATURE (OAT) SENSOR— The outdoor air temperature sensor (HH57AC080) is a 10 to 20mA device used to measure the outdoor- -air temperature. The outdoor- -air temperature is used to determine when the Economizer can be used for free cooling.
  • Page 47 Economizer Control Modes — Determine the Economizer control OUTDOOR ENTHALPY CHANGEOVER—For enthalpy mode before set up of the control. Some modes of operation may control, accessory enthalpy sensor (part number HH57AC078) is require different sensors. Refer to Table 15. The Economizer is required.
  • Page 48 IAQ sensor should be wired to the AQ and AQ1 terminals of the 6000 controller. Adjust the DCV potentiometers to correspond to the DCV voltage output of the indoor air quality sensor at the user determined 5000 set point. See Fig. 47. If a separate field- -supplied transformer is used to power the IAQ sensor, the sensor must not be grounded or the 4000 800 ppm...
  • Page 49 A10059 Fig. 49 - - Economizer Wiring Diagram...
  • Page 50 CONNECTION WIRING DIAGRAM DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING SCHEMATIC NOTES: 1. IF ANY OF THE ORIGINAL WIRES FURNISHED ARE REPLACED, IF USED THEY MUST BE REPLACED WITH THE SAME WIRE OR ITS EQUIVALENT. 208/230-3-60 2. SEE PRICE PAGES FOR THERMOSTATS. 3.
  • Page 51 LADDER WIRING DIAGRAM DANGER: ELECTRICAL SHOCK HAZARD DISCONNECT POWER BEFORE SERVICING UNIT COMPONENT ARRANGEMENT USE COPPER CONDUCTORS ONLY OUTDOOR FAN SECTION FIELD SUPPLY 208/230 VAC, 60 HZ, 3PH COMPRESSOR INDOOR FAN CONTROL BOX AREA SECTION SECTION (LARGE) LS2 (SMALL) TRAN (IF USED) CAP 1 CAP 2...
  • Page 52 DAMPER MOVEMENT — Damper movement from full open to The DCV set point may be left at 2 volts since the CO sensor full closed (or vice versa) takes 2 1/2 minutes. voltage will be ignored by the Economizer controller until it rises above the 3.6 volt setting of the minimum position potentiometer.
  • Page 53: Operation

    Table 20 – CO Sensor Standard Settings VENTILATION OPTIONAL RELAY RATE CONTROL RELAY ANALOG SETTING EQUIPMENT OUTPUT HYSTERESIS (CFM/ RANGE SETPOINT OUTPUT (PPM) PERSON) (PPM) (PPM) 0--- 10V Proportional 0--- 2000 1000 4--- 20mA Interface w/Standard Building 2--- 10V Proportional 0--- 2000 1000 Control System...
  • Page 54: Troubleshooting

    TROUBLESHOOTING 5. Turn the DCV set point potentiometer CW until the DCV LED turns off. The DCV LED should turn off when the See Table 21 for Economizer logic. An Economizer simulator potentiometer is approximately 9- -v. The actuator should program is available to help with Economizer training and drive fully closed.
  • Page 55 A10220 Fig. 51 - - 674D- -- -A 30- -36 3 Phase with Economizer...
  • Page 56 Fig. 52 - - 674D- -- -A 42- -60 3 Phase with Economizer Catalog No. II674D---07 E2010 Bryant Heating & Cooling Systems D 7310 W. Morris St. D Indianapolis, IN 46231 Edition Date: 04/10 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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