Bryant 548D - Manuals - manualsarea.com

Page 2 - Fig. 1 — Roof Curb Details

— 2 — Fig. 1 — Roof Curb Details PLACE UNIT AS CLOSE TO THIS END OF CURB AS POSSIBLE ROOF CURB ACCESSORY “A” UNIT SIZE 548D CRRFCURB003A00 1 ′ -2 ″ [356] 090-150 CRRFCURB004A00 2 ′ -0 ″ [610] 6. Service clearance 4 ft on each side. 7. Direction of airflow. 8. Connector packages CRBTMPWR001A00 and 00...

Page 3 - MAXIMUM ALLOWABLE; DRAIN PLUG; Drain plug is shown in factory-installed position.

— 3 — II. STEP 2 — FIELD FABRICATE DUCTWORK On vertical discharge units, secure all ducts to roof curb andbuilding structure. Do not connect ductwork to unit. For hori-zontal applications, field-supplied flanges should be attachedto horizontal discharge openings and all ductwork attachedto the flang...

Page 4 - Fig. 5 — Rigging Details

— 4 — NOTES: 1. Dimension in ( ) is in millimeters.2. Hook rigging shackles through holes in base rail, as shown in detail ‘‘A.’’ Holes in base rails are centered around the unit center of grav-ity. Use wooden top skid when rigging to prevent rigging strapsfrom damaging unit. 3. Unit weights do not ...

Page 6 - Table 1 — Physical Data

— 6 — Table 1 — Physical Data LEGEND *Indoor coil fin material/outdoor coil fin material. †Weight of 14-in. roof curb. **Requires an accessory or optional controls upgrade kit. NOTE: The 548D units have a loss-of-charge switch located in the liquid line avail- able as an option or an accessory. (Sta...

Page 7 - When installing units, provide a disconnect per the NEC.; LEGEND; Contactor; COMP —; Compressor; IFC; Indoor Fan Contactor; NEC; National Electrical Code; TB; Fig. 7 — Power Wiring Connections

— 7 — V. STEP 5 — MAKE ELECTRICAL CONNECTIONS A. Field Power Supply All units except 208/230-v units are factory-wired for thevoltage shown on the unit nameplate. If the 208/230-v unit isto be connected to a 208-v power supply, the transformermust be rewired by disconnecting the black wire from the2...

Page 10 - LEGEND AND NOTES FOR TABLES 2A AND 2B

— 10 — LEGEND AND NOTES FOR TABLES 2A AND 2B LEGEND *Heaters are field installed only. †Used to determine minimum disconnect per NEC. **Heater capacity (kW) is based on heater voltage of 208 v, 240 v, or 480 v and 575 v. If power distribution voltage to unit varies from rated heater voltage,heater k...

Page 11 - Adjustable Heat Anticipator; CC; Fig. 9 — Typical Field Control Wiring Raceway

— 11 — B. Field Control Wiring Install an approved accessory thermostat assembly accord-ing to installation instructions included with the accessory.Locate thermostat assembly on a solid wall in the condi-tioned space to sense average temperature in accordancewith thermostat installation instruction...

Page 14 - HOOD; Given —

— 14 — 4 3 2 1 0 5 6 7 8 9 UNIT TOP OAT(TERMINALS ARE UP) OUTSIDE AIRSCREEN MINIMUM POSITION OPEN 3 1 T P P1 T1 4 2 5 S S O D C TR B RE V . B 1 9 8 8 1 8 A % H U M I D I T Y 90 70 60 30 10 D C B A 60 65 70 75 55 50 85 80 D AMPER D AMPER CLOSED OPEN OUTDOOR TEMP . ° F REV. 97-367 2 CW – SETPOINTS – C...

Page 15 - CONTROLLER; Fig. 23 — Typical Access Panel Locations

— 15 — C. Optional EconoMi$er See Fig. 22 for EconoMi$er component locations. 1. To remove the existing unit filter access panel, raise the panel and swing the bottom outward. The panel isnow disengaged from the track and can be removed.Remove the indoor coil access panel and discard. SeeFig. 23. Co...

Page 18 - Fig. 33 — Supply Air Sensor Mounting Location; OR; Fig. 32 — Wiring Diagram for Power Exhaust System

— 18 — SUPPLY AIRTEMPERATURESENSORMOUNTINGLOCATION SUPPLY AIRTEMPERATURESENSOR Fig. 33 — Supply Air Sensor Mounting Location 4-PIN CONNECTOR PLUG L1 L2 GREEN 1 12 2 3 3 4 4 GND 230 VAC 1 PHASE GREEN/YELLOW 3 2 1 5 8 6 9 B A 7 4 LT. BLUE BLACK BROWN C1 BLUE GREEN/YELLOW 3 2 1 5 8 6 9 B A 7 4 LT. BLUE...

Page 19 - ST; Fig. 35 — Barometric Relief Capacity

— 19 — Mechanical Cooling Lockout Determine the outdoor-air temperature at which you wantthe mechanical cooling (compressors) to be disabled. Locatethe mechanical cooling lockout (MECH CLG LOCKOUT)potentiometer. To disable this feature, turn the potentiome-ter counterclockwise (CCW) to the OFF posit...

Page 20 - Mounting for Size 120

— 20 — 5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed changefor each full turn of pulley flange). To align fan and motor pulleys: 1. Loosen fan pulley setscrews. 2. Slide fan pulley along fan shaft. 3. Make angular alignment by loosening motor from...

Page 22 - Table 8 — Fan Performance 548D090 — Vertical Discharge Units

— 22 — Table 8 — Fan Performance 548D090 — Vertical Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied drive is required. (See Note 7.) 2. indicates alternate drive is required. 3. indicates field-supplied motor and drive are required. 4. Maximum usable watts input is 2120 and maximu...

Page 23 - Table 9 — Fan Performance 548D102 — Vertical Discharge Units

— 23 — Table 9 — Fan Performance 548D102 — Vertical Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied drive is required. (See Note 6.) 2. indicates field-supplied motor and drive are required. 3. Maximum usable watts input is 2120 and maximum continuous bhp is 2.40. Extensive motor ...

Page 24 - Table 10 — Fan Performance 548D120 — Vertical Discharge Units

— 24 — Table 10 — Fan Performance 548D120 — Vertical Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied or alternate (as appropriate) drive is required. (See Note 7.) 2. indicates alternate motor and drive are required. 3. indicates field-supplied motor and drive are required. 4. Max...

Page 25 - Table 11 — Fan Performance 548D090 — Horizontal Discharge Units

— 25 — Table 11 — Fan Performance 548D090 — Horizontal Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied drive is required. (See Note 7.) 2. indicates alternate drive is required. 3. indicates field-supplied motor and drive are required. 4. Maximum usable watts input is 2120 and max...

Page 26 - Table 12 — Fan Performance 548D102 — Horizontal Discharge Units

— 26 — Table 12 — Fan Performance 548D102 — Horizontal Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied drive is required. (See Note 6.) 2. indicates field-supplied motor and drive are required. 3. Maximum usable watts input is 2120 and maximum continuous bhp is 2.40. Extensive mot...

Page 27 - Table 13 — Fan Performance 548D120 — Horizontal Discharge Units

— 27 — Table 13 — Fan Performance 548D120 — Horizontal Discharge Units LEGEND NOTES: 1. Boldface indicates field-supplied or alternate (as appropriate) drive is required. (See Note 7.) 2. indicates alternate motor and drive are required. 3. indicates field-supplied motor and drive are required. 4. M...

Page 29 - When the compressor is rotating in the wrong direc-; To Shut Off Unit; To start unit, turn on main power supply.; To Shut Unit Off

— 29 — NOTE: When the compressor is rotating in the wrong direc- tion, the unit makes an elevated level of noise and does notprovide heating/cooling. IX. ADJUST GAS INPUT The gas input to the unit is determined by measuring thegas flow at the meter or by measuring the manifold pressure.Manifold pres...

Page 30 - SERVICE

— 30 — D. Cooling, Units With EconoMi$er When the Outdoor Air Temperature (OAT) is above theECON SP set point and the room thermostat calls forStage 1 cooling (R to G + Y1), the indoor-fan motor (IFM) isenergized and the EconoMi$er damper modulates to mini-mum position. The compressor contactor and ...

Page 31 - B. Fan Motor Bearings

— 31 — B. Outdoor Coils Inspect coils monthly. Clean condenser coils annually, and asrequired by location and outdoor-air conditions. Clean 2-row coils as follows: 1. Turn off unit power and tag disconnect. 2. Remove top panel screws on outdoor end of unit. 3. Remove outdoor coil corner post. See Fi...

Page 34 - TROUBLESHOOTING; Refer to Tables 14-16 and Fig. 46 for troubleshooting information.; Table 14 — Heating and Cooling Troubleshooting; PROBLEM

— 34 — TROUBLESHOOTING Refer to Tables 14-16 and Fig. 46 for troubleshooting information. Table 14 — Heating and Cooling Troubleshooting PROBLEM CAUSE REMEDY Compressor and outdoor fanwill not start. Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circ...

Page 35 - Table 15 — Durablade Economizer Troubleshooting

— 35 — Table 15 — Durablade Economizer Troubleshooting LEGEND PROBLEM CAUSE REMEDY Damper does notopen. Indoor fan is off. 1. Check to ensure that 24 vac is present at terminal C1 on the IFC or that 24 vac is present at the IFO terminal. Check whether 24 vac is present at PL6-1 (red wire)and/or PL6-...

Page 36 - Table 16 — EconoMi$er Troubleshooting

— 36 — Table 16 — EconoMi$er Troubleshooting LEGEND PROBLEM CAUSE REMEDY Damper does not open. Indoor Fan is Off. Check to ensure that 24 vac is present at Terminal C1 (Common Power)on the IFC (Indoor Fan contactor) or that 24 vac is present atthe IFO (Indoor Fan On) terminal. Check whether 24 vac i...

Page 37 - Fig. 46 — Typical Wiring Diagram

Page 40 - CUT A; I. PRELIMINARY INFORMATION

Copyright 2000 Bryant Heating & Cooling Systems CL-1 CATALOG NO. 5354-805 CUT A L O N G DO T T E D LINE C U T A L ONG DO T T E D L INE START-UP CHECKLIST (Remove and Store in Job File) I. PRELIMINARY INFORMATION MODEL NO.: _______________________________________ DATE: ___________________________...