Summary of the content on the page No. 1
installation and
550A
552A
start-up instructions
12, 13, 14 SEER
556A
SPLIT-SYSTEM AIR CONDITIONERS
WITH PURON® REFRIGERANT
Cancels: II 550A-24-5 II 550A-18-1
3-01
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
Summary of the content on the page No. 2
NOTE: Avoid contact between tubing and structure OUTDOOR WALL INDOOR WALL CAULK LIQUID TUBE A C L B VAPOR TUBE INSULATION THROUGH THE WALL 3 8 ⁄16″ JOIST 3 ⁄8 IN. DIA TIEDOWN KNOCKOUTS HANGER STRAP (2) PLACES (AROUND VAPOR INSULATION IN BASEPAN TUBE ONLY) A97375 VAPOR TUBE DIMENSIONS (IN.) → TIEDOWN KNOCKOUT MINIMUM LOCATIONS UNIT SIZE MOUNTING PAD DIMENSIONS AB 018 20 X 32 2-13/16 6-15/16 024–060 26 X 32 5-1/16 9-11/16 1″ MIN. Fig. 3—Clearance Requirements LIQUID TUBE SUSPENSION clearance on 1
Summary of the content on the page No. 3
INSTALLING TXV IN PLACE OF PISTON PISTON RETAINER 1. Pump system down to 2 psig and recover refrigerant. PISTON RING 2. Remove hex nut from piston body. Use backup wrench on PISTON fan coils. PISTON BODY 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 will not function properly. CAUTION: To prevent damage to the unit, use a brazing shield and wrap TXV wit
Summary of the content on the page No. 4
→ TABLE 1—REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID AND VAPOR TUBE DIAMETERS (IN.) LIQUID VAPOR VAPOR (LONG LINE) UNIT SIZE Connection Diameter Tube Diameter Connection Diameter Tube Diameter Connection Diameter Tube Diameter 018, 024 3/8 3/8 5/8 5/8 5/8 3/4 030, 036 3/8 3/8 3/4 3/4 3/4 7/8 042, 048 3/8 3/8 7/8 7/8 7/8 1-1/8 060 3/8 3/8 7/8 1-1/8 7/8 1-1/8 NOTES: 1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult the Application Guideline and Servi
Summary of the content on the page No. 5
R - 4 1 0 2. Braze filter drier between connector tube and liquid tube to 5000 indoor coil. Flow arrow must point towards indoor coil. 4500 C. REFRIGERANT TUBING 4000 Connect vapor tube to fitting on outdoor unit vapor service valves. LEAK IN 3500 SYSTEM Connect liquid tube to filter drier. (See Fig. 6 and Table 1.) Use 3000 refrigerant grade tubing. 2500 LIQUID-LINE 2000 FILTER-DRIER VACUUM TIGHT 1500 LIQUID TOO WET SERVICE 1000 VALVE TIGHT 500 DRY SYSTEM A95424 0 1 23 4 5 67 MINUTES CONNECTOR
Summary of the content on the page No. 6
NOTE: Install branch circuit disconnect of adequate size per XI. START-UP NEC to handle unit starting current. Locate disconnect within sight from and readily accessible from unit, per Section 440-14 of NEC. CAUTION: To prevent compressor damage or personal injury, observe the following: A. ROUTE GROUND AND POWER WIRES Do not overcharge system with refrigerant. Remove access panel to gain access to unit wiring. Extend wires Do not operate unit in a vacuum or at negative pressure. from discon
Summary of the content on the page No. 7
To calculate additional charge requried for a 25-ft line set: 5. Measure indoor air (entering indoor coil) wet-bulb tempera- ture with a sling psychrometer. 25 ft - 15 ft = 10 ft X 0.6 oz/ft=6ozof additional charge. 6. Refer to Table 4. Find outdoor temperature and evaporator B. COOLING ONLY PROCEDURE entering air wet-bulb temperature. At this intersection, note UNITS WITH COOLING MODE PURON® TXV superheat. Units installed with cooling mode TXV require charging by the 7. Refer to Table 5. Find s
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TABLE 3—REQUIRED LIQUID-LINE TEMPERATURE (°F) REQUIRED SUBCOOLING LIQUID TEMPERATURE PRESSURE AT (°F) SERVICE VALVE (PSIG) 8 1012141618 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 64 251 76 74 72 70 68 66 259 78 76 74 72 70 68 266 80 78 76 74 72 70 274 82 80 78 76 74 72 283 84 82 80 78 76 74 291 86 84 82 80 78 76 299 88 86 84 82 80 78 308 90 88 86
Summary of the content on the page No. 9
TABLE 5—REQUIRED SUCTION-LINE TEMPERATURE SUPERHEAT SUCTION PRESSURE AT SERVICE PORT (PSIG) TEMP 107.8 112.2 116.8 121.2 126.0 130.8 138.8 140.8 145.8 (°F) 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 53 55 57 59 61 63 14 49 51 53 55 57 59 61 63 65 16 51 53 55 57 59 61 63 65 67 18 53 55 57 59 61 63 65 67 69 20 55 57 59 61 63 65 67 69 71 22 57 59 61 63 65 6
Summary of the content on the page No. 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 4BW400. Puron® systems should be charged with liquid refrigerant only. Use a commercial type metering device in the manifold hose when charging into suction line with c
Summary of the content on the page No. 11
BRYANT BRYANT FA, FB, FC, NON-PROGRAMMABLE NON-PROGRAMMABLE FD, FF AIR SINGLE-STAGE AIR THERMOSTAT THERMOSTAT FAN COIL CONDITIONER FURNACE CONDITIONER MODEL AC MODEL AC 24 VAC HOT 24 VAC HOT R R R R 24 VAC COM C 24 VAC COM C C C SEE SEE C HEAT STAGE 1 W/W1 W C NOTE 2 NOTE 2 HEAT STAGE 1 W/W1 W2 COOL STAGE 1 Y Y/Y2 COOL STAGE 1 Y/Y2 INDOOR FAN G G INDOOR FAN G G A97359 A97360 BRYANT BRYANT PROGRAMMABLE PROGRAMMABLE FA, FB, THERMOSTAT SINGLE-STAGE AIR THERMOSTAT FC, FD, FF AIR MODEL AC FURNAC
Summary of the content on the page No. 12
BRYANT BRYANT NON-PROGRAMMABLE PROGRAMMABLE FK4C AIR AIR THERMOSTAT THERMOSTAT FK4C FAN COIL CONDITIONER CONDITIONER MODEL AC MODEL AC FAN COIL J1 JUMPER DH DH R R 24 VAC HOT 24 VAC HOT R R C INDOOR FAN G 24 VAC COM J1 JUMPER C G J2 JUMPER HEAT STAGE 1 W/W1 HEAT STAGE 1 W/W1 J2 JUMPER W1 SEE W1 C NOTE 2 Y/Y2 Y/Y2 COOL STAGE 1 COOL STAGE 1 W2 W2 Y/Y2 INDOOR FAN G NOT USED O/W2 Y/Y2 G Y1/W2 NOT USED SEE C O NOTE 2 Y1 C 24 VAC COM C Y1 A97363 B NOT USED OTHER O L NOT USED NON-PROGRAMMABLE FK4C AI
