Carrier 50BV020-064 specifications The LID display will show Year

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 . The LID display will show:

7.Enter the day of the month. Press ENTER then press

Manual background . The LID display will show:

Year 95

8.Enter the last two digits of the current year. Press

ENTER then press Manual background . The LID display will show: Update Clock

No

9.Press 1 and then ENTER to update the clock. The LID display will flash. Press CLEAR twice to view the de- fault display and the clock should update to the input time and date.

CONFIGURE SCHEDULES — Schedules are one method of starting and stopping the unit at specified intervals. To con- figure the schedules, perform the following procedure:

1.Press 1 and then SCHD . The LID display will show: Occupancy Algorithm

2.Press ENTER . The LID display will show: Time Schedule

Enter to Select

3.Press ENTER . If the LID display shows “MODE 0,” then the user is in Maintenance mode and the LID display is showing the maintenance information for the occupan- cy schedule. Press EXPN/EDIT to enter the configura- tion mode. The LID display will show:

Manual Override Hours 0 hours

This is the first configuration for each occupancy algorithm and is used to put the schedule in or out of occupancy override for the number of hours entered.

4.Press Manual background . The LID display will show: Period 1: Day of week

00000000

The eight digits represent the certain days of the week or holidays this period should apply to: M, Tu, W, Th, F, Sa, Su, and Hol, respectively. Enter a series of 0s or 1s with a 1 corresponding to the days that this period should apply to and a 0 for the days that this schedule should not apply to. As an example, entering 11111000 would make the schedule apply to days Monday through Friday and not apply to Saturday, Sunday, or Holidays.

5.Press the Manual background button. The LID display will show: Period 1 occupied from

00:00

6.Input the occupancy start time for this period. NOTE: 12.00 represents 12:00 pm.

7.Press the Manual background to input the occupied to time for period 1.

8.Input the days and times for periods 2 through 8 as required.

9.Press CLEAR to leave the occupancy programming.

PROGRAM SET POINTS — To program the set points, per- form the following procedure:

1.Press 2 and then SCHD . The LID display will show: Setpoint Schedule

2.Press ENTER . The LID display will show: Supply Fan Status

SETPT01

3.Press ENTER .

4.If “No Maintenance” is displayed, press EXPN/EDIT to view the set point information. The LID display will show:

Occupied Lo Setpoint 0.30 in. H2O

This is the pressure set point below which the fan is con- sidered to be off.

5.Press Manual background . The LID display will show: Occupied Hi Setpoint

0.40 in. H2O

This is the pressure set point above which the fan is con- sidered to be on.

The down or up arrow will also display the unoccupied low and high temperature set points. These values should be kept the same as the occupied values.

6.To view set points 02-09, use the following sequence: Press 2 and then SCHD . The LID display will show: Setpoint Schedule

Press ENTER . The LID display will show: Supply Fan Status

SETPT01

Press Manual backgroundManual backgroundManual background to scroll down to the desired set point. Press ENTER to select.

To view another point, press CLEAR once to move up

one menu level. Then press Manual backgroundManual backgroundManual background to scroll down to the desired set point and press ENTER to select.

7.Pressing the CLEAR button will take the user out of the set point configuration mode.

Set point functions are as follows:

Setpoint 02 (VAVRESETbaseline) internally coordinates the supply air set point reset in several of the algorithms and cannot be modified.

Setpoint 03 (Heat/Cool Mode & Reset) is used for com- parison by the unit to return air, space temperature, or average space temperature through linkage to determine when to start reset of the supply air when occupied, when to turn on heat and disable cooling when occupied, and when to bring the unit on for unoccupied heating or cooling.

Setpoint 05 (Supply Static Pressure) is used to set the sup- ply air static pressure the unit should maintain. Only the Occupied Low set point may be modified. The other values will change to the Occupied Low value shortly after it is modified so that all the values remain the same. The set point in the static pressure control algorithm will also follow and cannot be modified in the algorithm con- figuration screens.

Setpoint 06 (Supply Air Temperature) is the supply air temperature set point. Only the Occupied Low set point may be modified. The other values will change to the Occupied Low value shortly after it is modified so that all the values remain the same. The set point in DX VAV staging and some of the other algorithms will also follow and cannot be modified in the algorithm configuration screens.

Table 21 lists the available controller set points and their default values. Refer to 50BV,XJ Controls, Opera- tion and Troubleshooting manual for additional set point descriptions.

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Contents Installation, Start-Upand Service Instructions CONTENTSSAFETY CONSIDERATIONS GENERAL MAJOR SYSTEM COMPONENTS Constant Volume CV UnitsStep 1 - Complete Pre-InstallationChecks INSTALLATIONTable 2 - Modular Unit Shipping Table a50-7257efFig. 2 - 50BVC,J,Q020-034Dimensions Fig. 3 - 50BVE,K020-034Dimensions a50-8201 Fig. 4 - 50BVT,V,W034 High-BoyDimensionsFig. 5 - 50BVT,V,W034 Low-BoyDimensions Fig. 6 - 50BVT,V,W044-064 High-BoyDimensions Fig. 7 - 50BVT,V,W044-064 Low-BoyDimensions Fig. 8 - 50BVU,X034 High-BoyDimensions Fig. 9 - 50BVU,X034 Low-BoyDimensions Fig. 10 - 50BVU,X044-064 High-BoyDimensions Fig. 11 - 50BVU,X044-064 Low-BoyDimensions a50-7306ef NOTES 1.Dimensions in inches mma50-7307ef NOTES 1.Dimensions in inches mmShipping Weights lb a50-8235Size 034 Units Size 044-064Units Table 3A - Physical Data - 50BVC,E,J,K,Q Table 3B - Physical Data - 50BVT,U,V,W,X Multiple Fan Units Fig. 15 - Typical Fan Discharge Connections forFig. 16 - Duct Static Pressure Probe a50-7138efP/N 39EK20462 a50-7267efStep 4 - Make Piping Connections Fig. 19 - DHS Limit Switch P/Na50-8253 Fig. 18 - DHS Pressure Limit Location50BVC,J,Q Units Table 5A - Condenser Pressure DropTable 5B - Condenser Pressure Drop 50BVT,V,W Units50BVC,E,J,K,Q Units Table 6A - Hot Water Pressure DropTable 6B - Hot Water Pressure Drop 50BVT,U,V,W,X UnitsTable 7B - Economizer Pressure Drop Curve Step 5 - Complete Electrical Connectionsft wg, 50BVT,U,V,W,X Units a50-7270efTable 9A - Electrical Data - 50BVC,E,J,K,Q Table 9B - Electrical Data - 50BVT,U,V,W,X Fig. 24 - Typical Wiring 18 to 30 Ton Units a50-7272efTwo-StageCooling Units Table 10 - Recommended Cables a50-7273efa50-7164tf Fig. 26 - Field Terminal Blocka50-7275ef Installation Unit Discharge LocationFig. 27 - Modular Unit VAV Control Panel a39-1867tTable 11 - Thermistor Resistance vs Temperature START-UPValues for Supply-AirTemperature Sensor 10 Kilo- ohmTable 13 - Fan Performance - 50BVC,E,Q020 CV Unit Start-UpTable 14 - Fan Performance - 50BVC,E,Q024 Table 15 - Fan Performance - 50BVC,E,Q028 Table 16 - Fan Performance - 50BVC,E,Q034 Table 17 - Fan Performance - 50BVT,U,V034 Table 17 - Fan Performance - 50BVT,U,V034 cont Table 18 - Fan Performance - 50BVT,U,V044 Table 19 - Fan Performance - 50BVT,U,V054 Table 19 - Fan Performance - 50BVT,U,V054 cont Table 20 - Fan Performance - 50BVT,U,V064 Table 20 - Fan Performance - 50BVT,U,V064 cont VAV Unit Start-Up 02-06-04 OMNIZONE VPACFig. 32 - LID a50-7425efFig. 33 - 50BV VFD Display The LID display will show Year Table 21 - Controller Set Points Table 22 - Controller Hardware PointsTable 23 - Software Points Table 24 - Configuration Parameters Unoccupied space or return air temperature demand MAINTENANCE SERVICEFig. 34 - Gravity Flow Method a50-186tfa50-187tf Fig. 35 - Forced Circulation MethodTROUBLESHOOTING Evaporator Fan Performance AdjustmentCharging the System a50-7135tfPOSSIBLE CAUSE PROBLEMPROBLEM Table 28 - Unit TroubleshootingCORRECTION PROCEDURE POSSIBLE CAUSETable 29 - CV Units LED Diagnostic Codes Table 30 - Forcing an Input or OutputTable 31 - Clearing a Forced Input or Output Page Page Page Page UNIT WIRING FIELD WIRINGPage WIRE LEGEND FIELD WIRINGa50-7282ef TRANS-1PCB2 J1 FIELD WIRINGFIELD WIRING UNIT WIRINGPCB1 PCB1 FIELD WIRINGLEGEND AND NOTES FOR FIG Catalog No Copyright 2008 Carrier CorporationForm 50BV-3SI 10-08I. PRELIMINARY INFORMATION START-UPCHECKLISTII. PRE-START-UP CONTROLSIII.START-UP