York BCH 036, 048 & 060 Enthalpy Setpoint Adjustment, HONEYWELL ECONOMIZER CONTROL W7212

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MINIMUM POSITION ADJUSTMENT

177820-YIM-A-0506

MINIMUM POSITION ADJUSTMENT

With thermostat set to indoor fan on position, or termi- nals “R” to “G” energized, turn the Minimum Position

CONTROL

CONTROL POINT

 

 

APPROX. 0F (0C)

85

90 95 100 105 110

CURVE

AT 50% RH

(29)

(32) (35) (38) (41) (43)

 

A73 (23)

B

70 (21)

80

(27)

C

67 (19)

 

Adjusting screw (located on the damper control mod- ule) counterclockwise until the desired minimum damper position has been attained.

ENTHALPY SET POINT ADJUSTMENT

The enthalpy setpoint may now be set by selecting the desired setpoint shown in the Enthalpy Setpoint Adjust- ment Figure 4. Adjust as follows:

D63 (17)

45

75

(24)

70

(21)

65

(18)

60

(16)

55

(13)A

50 B

(10) C

For a single enthalpy operation carefully turn the setpoint adjusting screw (found on the damper control module) to the “A”, “B”, “C” or “D” setting corresponding to the lettered curve of the Enthalpy Setpoint Adjustment Figure 4.

For a dual enthalpy operation, carefully turn the setpoint adjusting screw fully clockwise past the “D” setting.

(7)

D

40

(4)

35

(2)

D C B A

35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110

(2)(4) (7) (10) (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)

APPROXIMATE DRY BULB TEMPERATURE - 0F (0C)

FIGURE 4 - ENTHALPY SETPOINT ADJUSTMENT

POWER EXHAUST DAMPER SETPOINT (WITH OR WITH- OUT POWER EXHAUST)

With no power exhaust option, adjust the Exhaust Air Adjustment Screw fully clockwise.

With power exhaust option, each building pressur- ization requirement will be different. The point at which the power exhaust comes on is determined by the economizer damper position (Percent Open). The Exhaust Air Adjustment Screw should be set at the Percent Open of the economizer damper at which the power exhaust is needed. It can be set from 0 to 100% damper open.

Exhaust Air

Adjustment

Screw

Exhaust Air LED

Damper Min.

Position

Screw

Indoor Air Quality

Max. Adjustment

Screw

Indoor Air Quality

LED

Indoor Air Quality

Min. Adjustment

Screw

Free Cooling LED

Economizer Enthalpy

Set Point Adjustment

Screw

N1

N

EXH

Set

 

 

P1

P

EXH

 

 

Min

T1

T

Pos

 

 

 

IAQ

 

 

Max

AQ1

AQ

IAQ

 

 

 

IAQ

SO+

SO

Min

 

 

Free

 

 

Cool

SR+

SR

 

 

B

C

 

A

D

TR ENTHALPY SET POINT ADJUSTMENTFIGURE 4 - ENTHALPY SETPOINT ADJUSTMENTFIGURE 5 - HONEYWELL ECONOMIZER CONTROL W7212Manual background TR1

2424

Vac Manual background Vac Manual backgroundManual background

HOT COM

+ Manual backgroundManual backgroundManual backgroundManual background

1

 

2

 

 

5

3

 

 

4

 

 

EF

 

 

EF1

 

 

 

 

 

 

 

 

 

 

 

 

FIGURE 5 - HONEYWELL ECONOMIZER CONTROL W7212

12

Unitary Products Group

Image 12
Contents BCH INSTALLATION MANUALCONTENTS SUNLINE SINGLE PACKAGE HEAT PUMPTABLE OF CONTENTS SEQUENCE OF OPERATIONS OVERVIEWCOOLING SEQUENCE OF OPERATION LIST OF FIGURES LIST OF TABLESSAFETY CONSIDERATIONS GENERALINSPECTION REFERENCEINSTALLATION INSTALLATION SAFETY INFORMATIONPRODUCT NOMENCLATURE LIMITATIONSTABLE 1 UNIT APPLICATION DATA BCH LOCATIONRIGGING AND HANDLING CLEARANCESDUCTWORK CONDENSATE DRAINFIGURE 1 - RECOMMENDED DRAIN PIPING COMPRESSORS FIGURE 2 - COMPRESSOR RESTRAINING BRACKETSERVICE ACCESS FILTERSTYPICAL POWER WIRING TYPICAL CONTROL WIRINGFIGURE 3 - TYPICAL FIELD POWER & CONTROL WIRING COOLING / HEATING 24 VOLT THERMOSTATPOWER AND CONTROL WIRING TABLE 2 CONTROL WIRE SIZESOPTIONS/ACCESSORIES THERMOSTATTABLE 3 ELECTRIC HEATER CFM LIMITATIONS ECONOMIZER/MOTORIZED DAMPER AND RAIN HOODFIGURE 4 - ENTHALPY SETPOINT ADJUSTMENT FIGURE 5 - HONEYWELL ECONOMIZER CONTROL W7212MINIMUM POSITION ADJUSTMENT ENTHALPY SET POINT ADJUSTMENTTABLE 5 BCH 4 POINT LOADS WEIGHT DISTRIBUTION TABLE 6 BCH 6 POINT LOADS WEIGHT DISTRIBUTIONFIGURE 6 - FOUR AND SIX POINT LOADING TABLE 4 CENTER OF GRAVITY ALL MODELSTABLE 8 OPERATING WEIGHTS LBS TABLE 7 PHYSICAL DATACOMPRESSORS Unitary Products Group None Unitary Products Group TABLE 11 ELECTRIC HEAT CORRECTION FACTORS TABLE 12 VOLTAGE LIMITATIONS1POWER SUPPLY NOMINAL VOLTAGEFIGURE 8 - UNIT WITH ECONOMIZER RAINHOOD DETAIL “A”DETAIL “B” FIGURE 10 - UNIT DIMENSIONS REAR VIEW FIGURE 11 - DISCONNECT/BLOWER ACCESS LOCATIONTABLE 13 UTILITIES ENTRY TABLE 14 MINIMUM CLEARANCESUnitary Products Group Page Unitary Products Group TABLE 19 BELT DRIVE BLOWER MOTOR AND DRIVE DATA 177820-YIM-A-0506Unitary Products Group FIGURE 12 - BELT ADJUSTMENT TABLE 20 STATIC RESISTANCESPHASING 5.Afteradjusting,re-tightennutsAOPERATION FIGURE 13 - PRESSURE DROP ACROSS COILSEQUENCE OF OPERATIONS OVERVIEW COOLING SEQUENCE OF OPERATIONCOOLING OPERATION ERRORS ECONOMIZER SINGLE OR DUAL WITH POWER EXHAUSTHIGH-PRESSURELIMIT SWITCH INTERMITTENT BLOWERSAFETY CONTROLS COMPRESSOR PROTECTIONLOW-PRESSURELIMIT SWITCH FREEZESTATSAFETY CONTROLS TABLE 21 ELECTRIC HEAT LIMIT CONTROL SETTING START-UPCOOLINGHEAT ANTICIPATOR SETPOINTS TABLE 22 ELECTRIC HEAT ANTICIPATOR SETPOINTSTROUBLESHOOTING COOLING TROUBLESHOOTING GUIDEOPERATING INSTRUCTIONS POST START CHECK LIST177820-YIM-A-0506 a.24 volts at the thermostat Y1 terminalUnitary Products Group MAINTENANCE NORMAL MAINTENANCEUNIT FLASH CODES TABLE 23 UNIT CONTROL BOARD FLASH CODESMOTORS OUTDOOR COIL177820-YIM-A-0506 Unitary Products GroupUnitary 5005Norman Products