Bryant 548F User Manual

Cancels: New II 548F-36-18/15/00IMPORTANT — READ BEFORE INSTALLING1. Read and become familiar with these installationinstructions before installing th

—10—Table 2B — Electrical Data (Units With Electrical Convenience Outlet)NOTE: Legend and Notes for Electrical Data are on page 12.UNIT548FNOMINALV-PH

—11—Table 2B — Electrical Data (Units With Electrical Convenience Outlet) (cont)NOTE: Legend and Notes for Electrical Data are on page 12.UNIT548FNOMI

—12—LEGEND FOR TABLES 2A AND 2B LEGEND*Heater capacity (kW) is based on heater voltage of 208 v, 240 v, or 480 v. Ifpower

—13—B. Field Control WiringInstall a Bryant-approved accessory thermostat assemblyaccording to installation instructions included with theaccessory. L

—14—Assembly1. Determine if ventilation air is required in building. Ifso, determine the minimum amount to be supplied byeach unit and record quantity

—15—SHIPPINGSCREWFig. 13 — Horizontal Discharge DurabladeEconomizer Installation4321056789Example: Given — Negative Pressure . . . . . . . . . . .0.2

—16—C. Optional EconoMi$erSee Fig. 19 for EconoMi$er component locations.1. To remove the existing unit filter access panel, raisethe panel and swing

—17—5. Slide the outdoor air inlet screens into the screentrack on the hood side panels. While holding thescreens in place, fasten the screen retainer

—18—OUTDOORAIRSENSORTEMPTEMPCOMOUTPWRBROWNVIOLETWHITEREDBROWNTEMPTEMPCOMOUTPWRRETURNAIRSENSORVIOLETWHITEREDOATCOMOAH-15 VRATCOMRAH+15 VECONOMI$ERCONTR

—19—10. Remove the indoor fan motor access panel. SeeFig. 29.11. Mount the supply air temperature sensor to the lowerleft portion of the indoor blower

—2—ROOF CURBACCESSORYAUNIT SIZE548FCRRFCURB001A001′-2″[356]036-072CRRFCURB002A002′-0″[610]NOTES:1. Roof curb accessory is shipped disassembled.2. Insu

—20—VII. STEP 7 — ADJUST INDOOR-FAN SPEEDAdjust indoor-fan rpm to meet jobsite conditions. See Table 5for fan rpm at motor pulley settings. See Table

—21—Table 5 — Fan RPM at Motor Pulley Settings**Approximate fan rpm shown.†Indicates alternate motor and drive package.**Indicates high-static motor a

—22—Table 8 — Fan Performance, 548F036 Standard Motor — Vertical Discharge UnitsLEGENDNOTES:1. Values include losses for filters, unit casing, and wet

—23—Table 10 — Fan Performance, 548F036 High-Static Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 1075 to 1455 rpm. All other rpms require

—24—Table 12 — Fan Performance, 548F048 Alternate Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 835 to 1185 rpm. All other rpms require fi

—25—Table 13 — Fan Performance, 548F048 High-Static Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 1075 to 1455 rpm. All other rpms require

—26—Table 15 — Fan Performance, 548F060 Alternate Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 900 to 1300 rpm. All other rpms require fi

—27—Table 16 — Fan Performance, 548F060 High-Static Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 1300 to 1685 rpm. All other rpms require

—28—Table 17 — Fan Performance, 548F072 Standard Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 1070 to 1460 rpm. All other rpms require fi

—29—Table 18 — Fan Performance, 548F072 High-Static Motor — Vertical Discharge UnitsLEGEND*Motor drive range: 1300 to 1685 rpm. All other rpms require

—3—If a plenum return is used on a vertical unit, the returnshould be ducted through the roof deck to comply with appli-cable fire codes.A minimum cle

—30—Table 19 — Fan Performance, 548F036 Standard Motor — Horizontal Discharge UnitsLEGENDNOTES:1. Values include losses for filters, unit casing, and

—31—Table 21 — Fan Performance, 548F036 High-Static Motor — Horizontal Discharge UnitsLEGEND*Motor drive range: 1075 to 1455 rpm. All other rpms requi

—32—Table 23 — Fan Performance, 548F048 Alternate Motor — Horizontal Discharge UnitsLEGEND*Motor drive range: 835 to 1185 rpm. All other rpms require

—33—Table 25 — Fan Performance, 548F060 Standard Motor — Horizontal Discharge UnitsLEGENDNOTES:1. Values include losses for filters, unit casing, and

—34—Table 27 — Fan Performance, 548F060 High-Static Motor — Horizontal Discharge UnitsLEGEND*Motor drive range: 1300 to 1685 rpm. All other rpms requi

—35—Table 28 — Fan Performance, 548F072 Standard Motor — Horizontal Discharge UnitsLEGEND*Motor drive range: 1070 to 1460 rpm. All other rpms require

—36—Table 29 — Fan Performance, 548F072 High-Static Motor — Horizontal Discharge Units)LEGEND*Motor drive range: 1300 to 1685 rpm. All other rpms requ

—37—PRE-START-UPProceed as follows to inspect and prepare the unit for initialstart-up: 1. Remove all access panels.2. Read and follow instructions on

—38—Check cooling effects at a setting below room temperature.Check unit charge. Refer to Refrigerant Charge section onpage 40. Unit must operate for

—39—the first stage of cooling is satisfied, there is a 30-second delaybefore the evaporator fan shuts off. The damper then moves tothe fully closed p

—4—V. STEP 5 — MAKE ELECTRICAL CONNECTIONSA. Field Power SupplyAll units except 208/230-v units are factory wired for thevoltage shown on the nameplat

—40—VII. LOSS-OF-CHARGE SWITCHLocated on the outdoor liquid line is a low-pressure switchwhich functions as a loss-of-charge switch. This switch con-t

—41—Fig. 39 — Cooling Charging Chart — 548F036Fig. 41 — Cooling Charging Chart — 548F060Fig. 40 — Cooling Charging Chart — 548F048Fig. 42 — Cooling Ch

—42—TROUBLESHOOTINGTable 30 — Heating and Cooling TroubleshootingPROBLEM CAUSE REMEDYCompressor andoutdoor fanwill not start.Power failure. Call power

—43—Table 31 — Durablade Economizer Troubleshooting LEGENDPROBLEM CAUSE REMEDYDamper does notopen.Indoor fan is off. 1. Check to e

—44—Table 32 — EconoMi$er Troubleshooting LEGENDPROBLEM CAUSE REMEDYDamper does notopen.Indoor Fan isOff.Check to ensure that 24

—45—SERVICE TRAININGPackaged Service Training programs are an excellent way to increase your knowledge of theequipment discussed in this manual, inclu

Copyright 2000 Bryant Heating & Cooling Systems CATALOG NO. 5354-808

Copyright 2000 Bryant Heating & Cooling SystemsCL-1CATALOG NO. 5354-808CUT ALONG DOTTED LINECUT ALONG DOTTED LINESTART-UP CHECKLIST(Remove and Sto

—5—Table 1 — Physical Data LEGEND*Indoor coil fin material/outdoor coil fin material.†Weight of 14-in. roof curb.**Single phase/three pha

—6—UNIT548FSTANDARDUNITWEIGHTDURABLADEECON. WEIGHTECONOMI$ERWEIGHTCORNERWEIGHT(A)CORNERWEIGHT(B)CORNERWEIGHT(C)CORNERWEIGHT(D)Lb Kg Lb Kg Lb Kg Lb Kg

—7—LEGENDFig. 6 — Power Wiring ConnectionsC—ContactorCOMP —CompressorIFC —Indoor Fan ContactorNEC —National Electrical Code208/230-1-60208/230-3-60460

—8—Table 2A — Electrical Data (Units Without Electrical Convenience Outlet)NOTE: Legend and Notes for Electrical Data are on page 12.UNIT548FNOMINALV-

—9—Table 2A — Electrical Data (Units Without Electrical Convenience Outlet) (cont)NOTE: Legend and Notes for Electrical Data are on page 12.UNIT548FNO