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Bryant 550A manual

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Table of contents for the manual

  • Page 1

    NOTE: Read the entire instruction manual before starting the installation. This symbol → indicates a change since the last issue. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property dam[...]

  • Page 2

    can be no deviation. Consult the Application Guideline and Service Manual — Air Conditioners and Heat Pumps Using Pu- ron ® Refrigerant to obtain required unit changes for specific applications and for R-22 retrofit. I. CHECK EQUIPMENT AND JOB SITE A. UNPACK UNIT Move to final location. Remove carton taking care not to damage unit. B. INSPECT EQ[...]

  • Page 3

    INSTALLING TXV IN PLACE OF PISTON 1. Pump system down to 2 psig and recover refrigerant. 2. Remove hex nut from piston body. Use backup wrench on fan coils. 3. Remove and discard factory-installed piston. Be sure teflon seal is in place. 4. Reinstall hex nut. Finger tighten nut plus 1/2 turn. NOTE: If the piston is not removed from the body, TXV wi[...]

  • Page 4

    VII. MAKE PIPING CONNECTIONS WARNING: Relieve pressure and recover all refrigerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow-control devices, including solenoid valves. CAUTION: Do not leave system open to atmosphere any longer than minimum required for installation. POE o[...]

  • Page 5

    2. Braze filter drier between connector tube and liquid tube to indoor coil. Flow arrow must point towards indoor coil. C. REFRIGERANT TUBING Connect vapor tube to fitting on outdoor unit vapor service valves. Connect liquid tube to filter drier. (See Fig. 6 and Table 1.) Use refrigerant grade tubing. D. SWEAT CONNECTION CAUTION: To avoid valve dam[...]

  • Page 6

    NOTE: Install branch circuit disconnect of adequate size per NEC to handle unit starting current. Locate disconnect within sight from and readily accessible from unit, per Section 440-14 of NEC. A. ROUTE GROUND AND POWER WIRES Remove access panel to gain access to unit wiring. Extend wires from disconnect through power wiring hole provided and into[...]

  • Page 7

    To calculate additional charge requried for a 25-ft line set: 25 ft - 15 ft = 10 ft X 0.6 oz/f t=6o zo f additional charge. B. COOLING ONLY PROCEDURE UNITS WITH COOLING MODE PURON ® TXV Units installed with cooling mode TXV require charging by the subcooling method. 1. Operate unit a minimum of 10 minutes before checking charge. 2. Measure liquid [...]

  • Page 8

    TABLE 3 — REQUIRED LIQUID-LINE TEMPERATURE ( ° F) LIQUID PRESSURE AT SERVICE VALVE (PSIG) REQUIRED SUBCOOLING TEMPERATURE ( ° F) 8 1 01 21 41 61 8 189 58 56 54 52 50 48 195 60 58 56 54 52 50 202 62 60 58 56 54 52 208 64 62 60 58 56 54 215 66 64 62 60 58 56 222 68 66 64 62 60 58 229 70 68 66 64 62 60 236 72 70 68 66 64 62 243 74 72 70 68 66 64 2[...]

  • Page 9

    TABLE 5 — REQUIRED SUCTION-LINE TEMPERATURE SUPERHEAT TEMP ( ° F) SUCTION PRESSURE AT SERVICE PORT (PSIG) 107.8 112.2 116.8 121.2 126.0 130.8 138.8 140.8 145.8 0 35 37 39 41 43 45 47 49 51 2 37 39 41 43 45 47 49 51 53 4 39 41 43 45 47 49 51 53 55 6 41 43 45 47 49 51 53 55 57 8 43 45 47 49 51 53 55 57 59 10 45 47 49 51 53 55 57 59 61 12 47 49 51 [...]

  • Page 10

    PURON ®— QUICK REFERENCE GUIDE • Puron ® refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are designed to operate with Puron ® . • Puron ® refrigerant cylinders are rose colored. • Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT 4B[...]

  • Page 11

    24 VAC HOT 24 VAC COM R C G W/W1 Y/Y2 R C C BRYANT NON-PROGRAMMABLE THERMOSTAT MODEL AC SINGLE-STAGE FURNACE AIR CONDITIONER SEE NOTE 2 Y G W HEAT STAGE 1 COOL STAGE 1 INDOOR FAN A97359 24 VAC HOT R G W/ W1 Y/ Y 2 O/ W2 R W Y C B S1 S2 BRYANT PROGRAMMABLE THERMOSTAT MODEL AC SINGLE-STAGE FURNACE AIR CONDITIONER G Y1 / W 2 L INDOOR FAN HEAT STAGE 1 [...]

  • Page 12

    24 VAC HOT R C W/W1 Y/Y2 G R DH W2 W1 Y/Y2 BRYANT NON-PROGRAMMABLE THERMOSTAT MODEL AC FK4C FAN COIL AIR CONDITIONER C INDOOR FAN HEAT STAGE 1 COOL STAGE 1 24 VAC COM Y1 C SEE NOTE 2 G O J2 JUMPER J1 JUMPER A97363 24 VAC HOT R W Y G R DH W1 W2 Y/ Y2 OTHER NON-PROGRAMMABLE AC THERMOSTAT FK4C FAN COIL AIR CONDITIONER C INDOOR FAN HEAT STAGE 1 COOL ST[...]