Page 2 - Before mounting unit, remove holddown brackets and; TOP; FRONT
— 2 — B. Locate Unit For service access and unrestricted airflow, provide clearanceon each end and side of unit. Position unit so that there isunrestricted airflow above unit. NOTE: Before mounting unit, remove holddown brackets and release skid. If conditions or local codes require unit to be faste...
Page 4 - Recommended service clearances are as; WEIGHT DISTRIBUTION; UNIT
— 4 — Fig. 3 — 541A180 Unit Dimensions NOTE: Recommended service clearances are as follows (local codes or jurisdictions may prevail):Side (compressor) — 3 1 / 2 ft (1067 mm) Side (opposite compressor) — 3 ft (914 mm)Ends — 2 ft (616 mm)Top — 5 ft (1524 mm) WEIGHT DISTRIBUTION UNIT 541A WEIGHT — lb ...
Page 5 - LEGEND
— 5 — LEGEND Fig. 4 — Component Locations — 541A180 Shown 1 — Defrost Board/Time Guard II Control 11 — Power Terminal Block 20 — High-Pressure Switch 2 — Fuse 12 — Control Terminal Block 21 — Compressor 3 — Fan No. 1 13 — Compressor Lockout (CLO2 for Crankcase Heater) 22 — Capacity Control Solenoid ...
Page 7 - Thermostatic Expansion Valve
— 7 — III. COMPLETE REFRIGERANT PIPING CONNECTIONS Refrigerant lines must be carefully designed and constructedto ensure equipment reliability and efficiency. Line length,pressure drop, compressor oil return, and vertical separationare several of the design criteria that must be evaluated. SeeTable ...
Page 8 - *A filter drier is shipped loose with the 575B072 units.; *Applies to Cooling mode of operation only.
— 8 — Table 4 — Refrigerant Specialties Part Numbers *A filter drier is shipped loose with the 575B072 units. †Bushings required. **Factory Installed. F. Provide Safety Relief A fusible plug is located on the compressor crankcase or inthe liquid line. See Fig. 6. Do not cap this plug. If local coder...
Page 10 - For wire runs up to 50 ft, use no. 18 AWG insulated wire; Table 7 — Electrical Data
— 10 — Duplex 575C120, 541A180 with 524A-H240 or 524A-H300 In order to properly connect two heat pump condensingunits to a single 524A-H packaged air handler, it isnecessary to add field-supplied Fan Coil Relay Board(s),P/N 33ZCRLYBRD. Relay board(s) no. 1 and no. 2 should beinstalled in the control...
Page 13 - CR
— 13 — TB2 HEAT PUMP “A” TB2 HEAT PUMP “B” G2/(W) G3/(Y) COM G MED(HEAT) HI(COOL) (VALVE) FAN LO R Y1 Y2 W1 W2 G C O WHT WHT C2 IFC C1 R Y1 Y2 W1 W2 G C X 524A-H HEAT ACCESSORY W1 W2 C 524A-H240 TERMINAL BLOCK TB1 FIELD POWERWIRING DISCONNECT FIELD POWER SUPPLY 3-Ph ONLY L1 L2 L3 EQUIP GND TB1 HC1 H...
Page 14 - Fig. 14 — Typical Field Wiring for Airflow Switch —
— 14 — Y2 TB2 HEAT PUMP A 541A180 R B W1 A2 Y1 Q C P X 1 2 TB2 HEAT PUMP B 575C120 G2/(W) G3/(Y) COM G MED(HEAT) HI(COOL) (VALVE) FAN LO G2/(W) G3/(Y) COM G MED(HEAT) HI(COOL) (VALVE) FAN LO R Y1 Y2 W1 W2 G C X WHT WHT C2 IFC C1 R Y1 Y2 W1 W2 G C X 524A-H HEAT ACCESSORY W1 W2 C 524A-H300 TERMINAL BL...
Page 15 - The amount of refrigerant added; SNUBBER WASHER; Fig. 16 — Recommended Process for
— 15 — PRE-START-UP IMPORTANT: Before beginning Pre-Start-Up or Start-Up, review Start-Up Checklist at the back of this book. Thechecklist assures proper start-up of the system and providesa record of unit condition, application requirements, systeminformation, and operation at initial start-up. I. ...
Page 16 - Various factors, including high humidity, high ambient tempera-; Fig. 17 — Recommended Minimum Cool-Down Time After
— 16 — Before starting the unit, charge liquid refrigerant into thehigh side of the system through the liquid service valve.Allow high and low side pressures to equalize before startingcompressor. If pressures do not equalize readily, chargevapor on low side of system to assure charge in the evapora...
Page 21 - VII. OUTDOOR UNIT FANS
— 21 — IV. 541A180 COOLING MODE OPERATION (See Fig. 22) 1. High pressure, high temperature refrigerant vapor from the compressor flows through the reversingvalve and is directed to the outdoor coil vapor header. 2. At the outdoor coil vapor header, the high pressure, high temperature refrigerant vap...
Page 24 - Fig. 24 — Pivot and Support Top Cover
— 24 — Routine Cleaning of E-Coated Coil Surfaces Monthly cleaning with Environmentally Sound Coil Cleaneris essential to extend the life of coils. It is recommendedthat all coils including standard aluminum, pre-coated,copper/copper, or E-coated coils be cleaned with the Environ-mentally Sound Coil...
Page 26 - OUBLESHO; LE
Copyright 2004 Bryant Heating & Cooling Systems Printed in U.S.A. CATALOG NO. 5357-506 TR OUBLESHO O T ING C HAR T — C OOLI N G CYCLE LE GEND CCH — Cr ank case Heat er TX V — T her m o st at ic Ex pansion V a lv e
Page 28 - COOLING
Copyright 2004 Bryant Heating & Cooling Systems Printed in U.S.A. 10-05A CL-2 CATALOG NO. 5357-506 CUT A L O N G DO TTE D LI NE C U T A L ONG DO TT ED L INE III. START-UP CHECK INDOOR FAN SPEED AND RECORD. _______________ CHECK OUTDOOR FAN SPEED AND RECORD. ________________ AFTER AT LEAST 10 MIN...