Bryant DURAPAC PLUS 551B User Manual

Cancels: II 551B-90-6 II 551B-90-710/15/05CONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1INSTALLATION . . . . .

—10—LEGEND AND NOTES FOR TABLE 2LEGEND*Heater capacity (kW) is based on heater voltage of 208, 240, 480, and 575-V. If powerdistribution voltage varie

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

—12—3. Use a wire nut to connect humidistat cable into low-voltage wiring as shown in Fig. 13.To install Thermidistat™ device:1. Route Thermidistat ca

—13—C. Convenience OutletAn optional convenience outlet provides power for rooftopuse. For maintenance personnel safety, the convenience out-let power

—14—2. The box with the economizer hood components isshipped in the compartment behind the economizer.The EconoMi$er IV controller is mounted on top o

—15—BTOPPANELINDOOR COILACCESS PANEL24 9/16”SCREWHOOD DIVIDERLEFTHOODSIDE40 3/8”Fig. 23 — Outdoor-Air Hood Construction22 1/4”DIVIDERBAROMETRICRELIEFC

—16—Table 5 — Supply Air Sensor Temperature/Resistance ValuesThe temperature sensor looks like an eyelet terminal withwires running to it. The sensor

—17—Outdoor Dry Bulb ChangeoverThe standard controller is shipped from the factory configuredfor outdoor dry bulb changeover control. The outdoor air

—18—Indoor Air Quality (IAQ) Sensor InputThe IAQ input can be used for demand control ventilationcontrol based on the level of CO2 measured in the spa

—19—Exhaust Set Point AdjustmentThe exhaust set point will determine when the exhaust fanruns based on damper position (if accessory power exhaust isi

—2—III. STEP 3 — INSTALL CONDENSATE DRAIN LINE ANDEXTERNAL TRAPCondensate drain connections are located at the bottom andend of the unit. Unit dischar

—20—Once base ventilation has been determined, set the mini-mum damper position potentiometer to the correct position.The same equation can be used to

—21—VII. STEP 7 — ADJUST EVAPORATOR-FAN SPEEDAdjust evaporator-fan rpm to meet jobsite conditions.For units with electric heat, required minimum cfm i

—22—Table 9 — Fan Rpm at Motor Pulley Setting*; Standard Motor/Drive*Approximate fan rpm shown.Table 10 — Fan Rpm at Motor Pulley Setting*; High-Stati

—23—Table 12 — Evaporator-Fan Motor Data — High-Static MotorsLEGENDBHP — Brake Horsepower*Extensive motor and electrical testing on these units ensure

—24—Table 15 — Fan Performance 551B090 — Vertical Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 840 to 1085 rpm. All other rp

—25—Table 16 — Fan Performance 551B090 — Vertical Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 860 to 1080 rpm. All other

—26—Table 17 — Fan Performance 551B102 — Vertical Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 840 to 1085 rpm. All other rp

—27—Table 18 — Fan Performance 551B102 — Vertical Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 860 to 1080 rpm. All other

—28—Table 19 — Fan Performance 551B120 — Vertical Discharge Units; Standard Motor (Belt Drive*LEGEND*Motor drive range: 860 to 1080 rpm. All other rpm

—29—Table 20 — Fan Performance 551B120 — Vertical Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 830 to 1130 rpm. All other

—3—NOTES:1. Roof curb accessory is shipped disassembled.2. Insulated panels: 1-in. thick polyurethane foam,13/4 lb density.3. Dimensions in [ ] are in

—30—Table 21 — Fan Performance 551B150 — Vertical Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 830 to 1130 rpm. All other rp

—31—Table 22 — Fan Performance 551B090 — Horizontal Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 840 to 1085 rpm. All other

—32—Table 23 — Fan Performance 551B090 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 860 to 1080 rpm. All oth

—33—Table 24 — Fan Performance 551B102 — Horizontal Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 840 to 1085 rpm. All other

—34—Table 25 — Fan Performance 551B102 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 860 to 1080 rpm. All oth

—35—Table 26 — Fan Performance 551B120 — Horizontal Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 860 to 1080 rpm. All other

—36—Table 27 — Fan Performance 551B120 — Horizontal Discharge Units; High-Static Motor (Belt Drive)*LEGEND*Motor drive range: 830 to 1130 rpm. All oth

—37—Table 28 — Fan Performance 551B150 — Horizontal Discharge Units; Standard Motor (Belt Drive)*LEGEND*Motor drive range: 830 to 1130 rpm. All other

—38—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

—39—IX. COOLINGTo start unit, turn on main power supply. Set system selectorswitch at COOL position and fan switch at AUTO position.Adjust thermostat

—4—NOTES:1. Place unit on curb as close as possible to the duct end.2. Dimension in ( ) is in millimeters.3. Hook rigging shackles through holes in

—40—Subcooling ModeWhen subcooling mode is initiated, this will energize (close)the liquid line solenoid valve (LLSV) forcing the hot liquidrefrigeran

—41—Table 29 — Perfect Humidity™ Dehumidification System Sequence of Operationand System Response — Dual Compressor UnitsLEGENDNOTE: On a thermostat c

—42—C. Condensate DrainCheck and clean each year at start of cooling season. In win-ter, protect against freeze-up.D. FiltersClean or replace at start

—43—Fig. 47 — Cooling Charging Charts, Standard 551B090 UnitFig. 48 — Cooling Charging Charts, Standard 551B102 Unit

—44—Fig. 49 — Cooling Charging Charts, Standard 551B120 UnitFig. 50 — Cooling Charging Charts, Standard 551B150 Unit

—45—E. To Use Cooling Charging Charts, Units the PerfectHumidity™ Dehumidification SystemRefer to the charts (Fig. 51-53) to determine the proper leav

—46—TROUBLESHOOTINGI. UNIT TROUBLESHOOTINGRefer to Tables 30-32 for additional information.Table 30 — Cooling TroubleshootingPROBLEM CAUSE REMEDYCompr

—47—Table 31 — Perfect Humidity™ Dehumidification System Subcooling Mode Service AnalysisTable 32 — Perfect Humidity Dehumidification Hot Gas Reheat M

—48—II. ECONOMI$ER IV TROUBLESHOOTINGSee Table 33 for EconoMi$er IV logic.A functional view of the EconoMi$er IV is shown in Fig. 54.Typical settings,

—49—4. Remove the jumper across T and T1. The actuatorshould drive fully closed.5. Return EconoMi$er IV settings and wiring to normalafter completing

—5—Fig. 7 — Base Unit Dimensions

Copyright 2005 Bryant Heating & Cooling Systems Printed in U.S.A. CATALOG NO. 04-53551004-01INDEXAccess panels 14Barometric flow capacity 1

Copyright 2005 Bryant Heating & Cooling Systems Printed in U.S.A. CL-1 CATALOG NO. 04-53551004-01CUT ALONG DOTTED LINECUT ALONG DOTTED LINESTART-U

—6—Table 1 — Physical DataLEGENDBhp — Brake HorsepowerUNIT 551B 090 102 120 150NOMINAL CAPACITY (tons) 71/281/210 121/2OPERATING WEIGHT (lb)Unit 755 8

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

—8—Table 2 — Electrical DataSee page 10 for legend and notes.UNIT551BNOMINALV-P H- HzIFMTYPECONVOUTLET VOLTAGERANGECOMP NO. 1 COMP NO. 2OFMQTYOFMFLAIF

—9—Table 2 — Electrical Data (cont)See page 10 for legend and notes.UNIT551BNOMINALV-PH-HzIFMTYPECONVOUTLET VO LTAG ERANGECOMP NO. 1 COMP NO. 2OFMQTYO