Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 50EK, 50EJ, 50EW, 50EY Start-Upchecklist, Pre-Start-Up, Electrical, Temperatures, Pressures

Models: 50EK 50EY 50EW 50EJ

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START-UP CHECKLIST

MODEL NO.:				SERIAL NO.:
SOFTWARE VERSION (SEE FIG. 15)				SERIAL NO.:
SOFTWARE VERSION (SEE FIG. 15)				TECHNICIAN:
DATE:				TECHNICIAN:
DATE:

PRE-START-UP:

VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS

VERIFY INSTALLATION OF ECONOMIZER HOOD

VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK THAT INDOOR-AIR FILTER IS CLEAN AND IN PLACE

VERIFY THAT UNIT IS LEVEL WITHIN TOLERANCES

CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SET SCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

VERIFY THAT SUCTION, DISCHARGE, AND LIQUID LINE SERVICE VALVES ON EACH CIRCUIT ARE OPEN

START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2

L2-L3

L3-L1

COMPRESSOR AMPS Ð COMPRESSOR NO. 1

L1

L2

L3

Ð COMPRESSOR NO. 2

L1

L2

L3

SUPPLY FAN AMPS (CV)

EXHAUST FAN AMPS

(VAV)

*

*VAV fan supply amps reading must be taken with a true RMS meter for accurate readings.

ELECTRIC HEAT AMPS (IF SO EQUIPPED)

L1

L2

L3

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

F

DB (Dry-Bulb)

RETURN-AIR TEMPERATURE

F

DB

F

WB (Wet-Bulb)

COOLING SUPPLY AIR

F

ELECTRIC HEAT SUPPLY AIR (IF SO EQUIPPED)							F
PRESSURES
REFRIGERANT SUCTION	CIRCUIT NO. 1					PSIG	CIRCUIT NO. 2				PSIG
REFRIGERANT DISCHARGE	CIRCUIT NO. 1					PSIG	CIRCUIT NO. 2				PSIG

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGE 45

CL-1

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Carrier 50EK, 50EJ, 50EW, 50EY installation instructions Start-Upchecklist, Pre-Start-Up, Electrical, Temperatures, Pressures

Contents

SAFETY CONSIDERATIONS CONTENTSIMPORTANT Ð READ BEFORE INSTALLING INSTALLATION Step 1 Ð Provide Unit SupportUNIT LEVELING TOLERANCES DIMENSIONS Fig. 1 Ð Roof Curb SizesDegrees and Inches UNIT LEVELING TOLERANCES DIMENSIONS Fig. 2 Ð Roof Curb SizesDegrees and Inches Fig. 3 Ð Base Unit Dimensions, 50EJ/EK024-034 UNIT SIZE Fig. 5 Ð Base Unit Dimensions, 50EW/EY024-034 UNIT SIZE NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE WHEN RIGGINGFig. 7 Ð Rigging Label HIGH-PRESSURESWITCH psig Table 1 Ð Physical DataOPERATING WEIGHT lb Factory Speed Setting rpmHIGH-PRESSURESWITCH psig Table 1 Ð Physical Data contOPERATING WEIGHT lb Factory Speed Setting rpmFig. 9 Ð Air Distribution Ð Thru-the-Side Step 4 Ð Make Unit Duct ConnectionsTable 2 Ð Evaporator Fan Motor Data Fig. 8 Ð Air Distribution Ð Thru-the-BottomFeatures with Thermostat Control of Unit Fig. 11 Ð Field Control Remote Start/Stop Fig. 12 Ð Control Board Diagram Step 7 Ð Make Electrical Connections Fig. 13 Ð Field Power Wiring Connections1.Remove cap from red 208-vwire Table 4 Ð Electrical Data Ð 50EJ,EK,EW,EY024-048 150/150 200/200 225/200 225/225 23.6 23.6 PEC Ð Power Exhaust Controller Fig. 14 Ð Control Box Diagram SizesFig. 15 Ð Control Box Diagram Sizes PEC − Power Exhaust ControllerFig. 17 Ð Field Control Temperature Sensor Wiring Step 8 Ð Make Outdoor-AirInlet AdjustmentsFig. 16 Ð Field Control Thermostat Wiring Table 5 Ð CCN Connection Approved Shielded CablesFig. 20 Ð Adding Seal Strip to Fig. 18 Ð Adding Seal Strip to Top of Hood SidesMounting Flange of Hood Sides Fig. 22 Ð Adding Foam Strip to Cross Member Attached to Filter Track AssemblyFig. 21 Ð Adding Seal Strip to Hood Top Mounting FlangeFig. 28 Ð Differential Enthalpy Control Fig. 29 Ð Wire Connections for Solid StateFig. 30 Ð Psychrometric Chart for Fig. 27 Ð Attaching Seal Strip to Filter CoverExhaust Mounting Details Fig. 31 Ð Barometric Relief Damper and PowerFig. 33A Ð Motormaster III Sensor Location Sizes Fig. 32 Ð Pressure Transducer LocationsFig. 33C Ð Motormaster III Sensor Location START-UP Table 8 Ð Potentiometer Signal Levels Direct Digital Controls DIP Switch ConguraTable 9 Ð Power Exhaust Default Set Points SETTING Sequence of Operation AIRFLOW AVAILABLE EXTERNAL STATIC PRESSURE in. wg Table 15 Ð Air Quantity Limits Table 17 Ð User Dened Set Points Table 16 Ð Motor LimitationsThe control module will operate economizer, run diag- nostics to monitor alarms/alerts at all times, and respond to CCN communications to perform any congured network POC product outboard control functions such as time/ outdoor-airtemperature broadcast and global occupancy broad- cast. When the optional expansion I/O board is employed, it will perform a periodic scan and maintain a database of ex- panded I/O points perform Fire/Smoke control power ex- haust required if in Occupied mode, perform IAQ control and monitor the fan, lter, demand limit, and eld-appliedstatus with accessories Fig. 36 Ð Space Temperature Sensor Wiring Fig. 35 Ð Heat Interlock Relay WiringTable 19 Ð Cooling Capacity Staging Table SERVICETable 18 Ð Cooling Capacity Staging Table CV Units with 2 CompressorsFig. 38 Ð Evaporator-FanPulley Alignment Evaporator Fan Service and Replacementand Adjustment LubricationFig. 39 Ð Belt Tension Adjustment Belt Tension Adjustment Ð To adjust belt tensionCondenser-FanAdjustment Evaporator-FanMotor ReplacementFig. 42 Ð Cooling Charging Chart Sizes Fig. 41 Ð Cooling Charging Chart SizesFig. 43 Ð Typical Refrigerant Circuiting TROUBLESHOOTING50EJ,EK,EW,EY024-034 HPS Ð High-PressureSwitch Fig. 44 Ð Typical Refrigerant Circuiting50EJ,EK,EW,EY038,044 LEGEND FPS Ð Freeze Protection SwitchHPS Ð High-PressureSwitch Fig. 45 Ð Typical Refrigerant Circuiting50EJ,EW048 LEGEND FPS Ð Freeze Protection SwitchTable 20 Ð Control Board LED Alarms Base Module Ð VAV Table 21 Ð I/O Channel DesignationsBase Module Ð CV Table 22 Ð I/O Channel DesignationsModule Ð CV and VAV Table 23 Ð I/O Channel Designations ExpansionPage Page PACKAGED SERVICE TRAINING TEMPERATURES START-UPCHECKLISTPRE-START-UP ELECTRICALGENERAL START-UPCHECKLIST cont