Bryant Legacy 704D--A Installation Instructions Manual Download Page 50

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

2010 Bryant Heating & Cooling Systems

7310 W. Morris St.

Indianapolis, IN 46231

Edition Date: 04/10

Replaces: II704D--- 06

Catalog No. II704D---07

704D

Summary of Contents for Legacy 704D--A

Page 1: ...allation and servicing of this equipment can be hazardous due to mechanical and electrical components Only trained and qualified personnel should install repair or service this equipment Untrained per...

Page 2: ...gasketing also can result in air leaks and poor unit performance Curb should be level to within 1 4 in 6 35 mm See Fig 6 This is necessary for unit drain to function properly Refer to accessory roof...

Page 3: ...3 A09467 Fig 2 704D A24 36 Unit Dimensions 704D A...

Page 4: ...4 A09468 Fig 3 704D A42 60 Unit Dimensions 704D A...

Page 5: ...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 C...

Page 6: ...ane operators and ground support staff should handle and install this equipment When working with this equipment observe precautions in the literature on tags stickers and labels attached to the equip...

Page 7: ...7 Install Duct Connections The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of non residence type air conditioning and ventilating...

Page 8: ...ll ductwork for maximum required airflow either heating or cooling for unit being installed Avoid abrupt duct size increases or decreases or performance may be affected 6 Adequately insulate and weath...

Page 9: ...d connection 3 Locate the black and yellow wires connected to the line side of the contactor 4 Connect field L1 to black wire on connection 11 of the compressor contactor POWER SUPPLY FIELD SUPPLIED F...

Page 10: ...174 406 184 COMPRESSORS Quantity Scroll 1 REFRIGERANT R 410A Quantity lb Quantity kg 4 8 2 2 6 2 2 8 6 4 2 9 6 1 2 7 6 4 2 9 10 0 4 5 REFRIGERANT METERING DEVICE TXV OUTDOOR COIL Rows Fins in Face Are...

Page 11: ...cover refrigerant from system and evacuate to 500 microns if no additional leaks are found 5 Charge unit with Puron R 410A refrigerant using an accurate scale Refer to unit rating plate for required c...

Page 12: ...ure not used To change cooling speed 1 Remove the vinyl cap off of the desired speed tap wire Refer to Table 3 for color coding Add the wet coil pressure drop in Table 5 to the system static to determ...

Page 13: ...ower speed WARNING CONTINUOUS FAN OPERATION When the DEHUM feature is not used the continuous fan speed will be the same as cooling fan speed When the DEHUM feature is used the continuous fan will ope...

Page 14: ...ssure available for ducting Shaded areas indicate airflows that are not recommended for dehumidification control Table 5 704D A Wet Coil Pressure Drop IN W C UNIT SIZE STANDARD CFM S C F M 600 700 800...

Page 15: ...INSTRUCTIONS TO DETERMINE CORRECT SPEED TAP SETTING 6 DO NOT DISCONNECT PLUG UNDER LOAD 7 THIS FUSE IS MANUFACTURED BY LITTELFUSE P N 257003 8 UNIT FACTORY SHIPPED IN STD MODE ACCESSSORY ELECTRIC HEA...

Page 16: ...P1 4 P1 3 P1 2 P1 1 P2 4 P2 3 P2 2 P2 1 C C1 C2 HR1 HR4 HR2 HR3 BRN BRN BRN BRN WHT VIO PNK GRY 2 5 4 3 1 BLU PNK RED BLK G Y HIGH C P4 4 P4 3 P4 2 P4 1 P4 5 IFB RED 24VAC IF USED ACCESSORY ELECTRIC...

Page 17: ...17 A10202C Fig 13 Connection Wiring Diagram 208 230 3 60 704D A...

Page 18: ...18 A10202L Fig 13 Cont Ladder Wiring Diagram 208 230 3 60 704D A...

Page 19: ...SES ARE MANUFACTURED BY COOPER BUSSMAN P N FNQ R 5 9 DEHUM FEATURE CANNOT BE USED WHEN ECONOMIZER IS INSTALLED UNIT FACTORY SHIPPED IN STD MODE ACCESSSORY ELECTRIC HEAT HR1 5 KW HR1 2 10 KW HR1 2 3 15...

Page 20: ...HT VIO PNK GRY 2 5 4 3 1 BLU PNK RED BLK G Y HIGH C P4 4 P4 3 P4 2 P4 1 P4 5 IFB RED 24VAC IF USED ACCESSORY ELECTRIC HEAT G Y RED BRN WHT VIO PNK GRY R C Y1 G W2 W3 50VL500271 YEL L2 ORN SEE NOTE 4 D...

Page 21: ...21 A08490 Fig 15 Cooling Charging Chart 704D A...

Page 22: ...with the same dimensional size and type as originally installed See Table 11 for recommended filter sizes Inspect air filter s at least once each month and replace throwaway type or clean cleanable ty...

Page 23: ...lush all dirt and debris from the unit base Inspect the drain pan and condensate drain line when inspecting the coils Clean the drain pan and condensate drain by removing all foreign matter from the p...

Page 24: ...ure drop at about 20 psig 957 Pa If system pressure is above this switch should be closed To check switch 1 Turn off all power to unit 2 Disconnect leads on switch 3 Apply ohmmeter leads across switch...

Page 25: ...an impermeable polyethylene plastic drip cloth or tarp Cover an approximate 10 x 10 ft 3 x 3 m area 2 Cover area in front of the unit service panel with a terry cloth shop towel to absorb lubricant s...

Page 26: ...ith minimum 700 psig service pressure rating S Leak detectors should be designed to detect HFC refrigerant S Puron as with other HFCs is only compatible with POE oils S Vacuum pumps will not remove mo...

Page 27: ...compressor Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run start capacitor overload or start relay Det...

Page 28: ...INDOOR EVAPORATOR AIR FILTER IS CLEAN AND IN PLACE VERIFY THAT UNIT INSTALLATION IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING ORIFICE AND SETSCREW TIGHTNESS III START UP ELECTRICAL...

Page 29: ...V Control Using a Duct Mounted CO2 Sensor 33ZCSENC02 or CGCDXSEN004A00 and 33ZCASPCO2 or CGCDXASP00100 or CRCBDIOX005A00 CRENTDIF004A00 accessory is used on many different base units As such these kit...

Page 30: ...ber Table 13 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 t...

Page 31: ...Duct Cover Panel Hood Divider Removed A09691 Fig 20 Horizontal Return Duct Cover Panel Removal Filter Angle Bracket Right Hood Side Panel Left Hood Side Panel Filter Angle Bracket A09692 Fig 21 Filter...

Page 32: ...nel Hood Top Panel Left Hood Side Panel Hood Divider A09693 Fig 22 Economizer Hood Assembly A09694 Fig 23 Economizer Hood Installation Filter Clips Aluminum Filter A09695 Fig 24 Filter Installation Se...

Page 33: ...eturn 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...

Page 34: ...698 Fig 27 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 28 Filter Angle Bracket Installation...

Page 35: ...mm 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...

Page 36: ...points The temperature changeover is set using 3 dip switches on the sensor The ABCD potentiometer on the controller should be set to the D position See Fig 35 SUPPLY AIR TEMPERATURE SAT SENSOR The su...

Page 37: ...adjust the outdoor air dampers to minimum position If the outdoor air temperature is below the set point the position of the outdoor air dampers will be controlled to provide free cooling using outdoo...

Page 38: ...en the outdoor air has a lower enthalpy than the return air and is below the set point the Economizeropenstobringinoutdoorairfor freecooling Replacethe standard outside air dry bulb temperature sensor...

Page 39: ...e is 75_F 23 9_C 60 x 10 75 x 90 73 5_F 23 1_C 2 Disconnect the supply air sensor from terminals T and T1 3 Ensure that the factory installed jumper is in place across terminals P and P1 If remote dam...

Page 40: ...CAL ECONOMIZER THE ECONOMIZER MOTOR CONNECTIONS ARE AS SHOWN FOR HORIZONTAL ECONOMIZER THE ECONOMIZER MOTOR IS ATTACHED TO THE ECONOMIZER IV BOARD THE WIRES SHOWN ARE NOT UTILIZED BLK WHT RED 5 WHEN N...

Page 41: ...41 A10201 Fig 41 Connection Wiring Diagram 230 3 704D A...

Page 42: ...42 A10201 Fig 41 Cont Ladder Wiring Diagram 230 3 704D A...

Page 43: ...43 A10203 Fig 42 Connection Wiring Diagram 460 3 704D A...

Page 44: ...44 A10203 Fig 42 Cont Ladder Wiring Diagram 460 3 704D A...

Page 45: ...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 46: ...ree 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 1...

Page 47: ...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 48: ...48 REQUIRED CLEARANCES TO COMBUSTIBLE MATL NEC REQUIRED CLEARANCES REQUIRED CLEARANCE FOR OPERATION AND SERVICING A10230 Fig 43 704D A 30 36 3 Phase with Economizer 704D A...

Page 49: ...49 REQUIRED CLEARANCES TO COMBUSTIBLE MATL NEC REQUIRED CLEARANCES REQUIRED CLEARANCE FOR OPERATION AND SERVICING A10231 Fig 44 704D A 42 60 3 Phase with Economizer 704D A...

Page 50: ...nue or change 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 Edition Date 04 10...

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