Manuals / Carrier / Household Appliance / Air Conditioner

Carrier EY024-048 Ð Space Temperature Averaging Wiring, Ð CCN Connection Approved Shielded Cables

Models: EY024-048 EK 48EJ

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Fig. 22 Ð Space Temperature Averaging Wiring

SPACE TEMPERATURE AVERAGING Ð 4 SENSOR APPLICATION

SPACE TEMPERATURE AVERAGING Ð 9 SENSOR APPLICATION

Fig. 22 Ð Space Temperature Averaging Wiring

Remote Field Control Ð A switch closure across terminals R and W1 on TB-3 will initiate the Occupied mode. This can be done manually as well as through a ®eld-supplied timeclock.

Service Tool, Building Supervisor, and ComfortWorks™ Software Ð Access to the control board can be achieved through the terminal marked CCN via a 3-wire bus.

IMPORTANT: The default bus address is 0. The de- fault element number is 1. Refer to CCN literature to change the default values, if needed.

Carrier Comfort Network Interface Ð The 48E units can be connected to the CCN. The communication bus wiring is sup- plied and installed in the ®eld. Wiring consists of shielded, 3-conductor cable with drain wire.

The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system element on either side of it, the negative pins must be wired to the negative pins, and the

signal pins must be wired to signal ground pins. Wiring con- nections for CCN should be made at the 3-pin plug (CCN located at the base board). Consult CCN literature for fur- ther information.

Conductors and drain wire must be 20 AWG minimum stranded, tinned copper. Individual conductors must be in- sulated with PVC, PVC/nylon, vinyl, Te¯on, or polyethyl- ene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Te¯on with a minimum operating temperature range of −20 C to 60 C (−4 F to 140 F) is required. Table 5 lists cables that meet the requirements.

Table 5 Ð CCN Connection Approved Shielded Cables

MANUFACTURER	CABLE PART NO.
Alpha	2413 or 5463
American	A22503
Belden	8772
Columbia	02525

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Carrier EY024-048, 48EJ, EW, EK Ð Space Temperature Averaging Wiring, Ð CCN Connection Approved Shielded Cables

Contents

Step 10 Ð Position Power Exhaust/Barometric CONTENTSSAFETY CONSIDERATIONS INSTALLATION Step 1 Ð Provide Unit SupportInstructions continued on page Step 3 Ð Field Fabricate DuctworkDegrees and Inches Fig. 1 Ð Roof Curb SizesUNIT LEVELING TOLERANCES DIMENSIONS Degrees and Inches Fig. 2 Ð Roof Curb SizesUNIT LEVELING TOLERANCES DIMENSIONS Fig. 3 Ð Base Unit Dimensions, 48EJ,EK024-034 Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048 Fig. 5 Ð Base Unit Dimensions, 48EW,EY024-034 Fig. 6 Ð Base Unit Dimensions, 48EW,EY038-048 Fig. 7 Ð Rigging Label WHEN RIGGINGNOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE Table 1 Ð Physical Data Table 1 Ð Physical Data cont Fig. 10 Ð Flue Hood Location Fig. 8 Ð Air Distribution Ð Thru-the-BottomFig. 9 Ð Air Distribution Ð Thru-the-Side Fig. 13 Ð Field Gas Piping Fig. 11 Ð Combustion Fan Housing LocationFig. 12 Ð Condensate Drain Trap Piping Details Typical Roof Curb or Slab Mount Shown·support a eld test for eld checkout Fig. 15 Ð Indoor Air Quality Sensor Conguration Fig. 14 Ð Field Control Remote Start/StopStep 8 Ð Make Electrical Connections Fig. 16 Ð Control Board Diagram Table 4 Ð Electrical Data Table 4 Ð Electrical Data cont UNIT Table 4 Ð Electrical Data contFig. 18 Ð Control Box Diagram Sizes Fig. 17 Ð Field Power Wiring ConnectionsCV or VAV Units Fig. 19 Ð Control Box Diagram SizesFig. 21 Ð Field Control Temperature Sensor Wiring Fig. 20 Ð Field Control Thermostat WiringTable 5 Ð CCN Connection Approved Shielded Cables Fig. 22 Ð Space Temperature Averaging WiringTable 6 Ð Color Code Recommendations Step 9 Ð Make Outdoor-AirInlet AdjustmentsFig. 26 Ð Adding Seal Strip to Hood Top Fig. 23 Ð Adding Seal Strip to Top of Hood SidesFig. 25 Ð Adding Seal Strip to Mounting Flange of Hood SidesFig. 30 Ð Mounting Angle Without Tabs Attached to Filter Track AssemblyFig. 28 Ð Adding Foam Strip to Hood Side Fig. 29 Ð Adding Foam Strip to Blockoff BaffleFig. 32 Ð Attaching Seal Strip to Filter Cover Filter Track AssemblyFig. 31 Ð Mounting Angle With Tabs Attached to Enthalpy Control Fig. 34 Ð Wiring Connections for Solid-StateFig. 35 Ð Psychrometric Chart for Enthalpy Control HH57AC077Exhaust Mounting Details Fig. 37 Ð Barometric Relief Damper and PowerFig. 39 Ð Motormaster III Baffle Details Fig. 38 Ð Pressure Transducer LocationsSTART-UP Table 7 Ð VFD Supply Air Pressure Set Point Fig. 41 Ð VFD Factory-InstalledJumpersTable 8 Ð Potentiometer Signal Levels Direct Digital Controls DIP Switch ConguraTable 11 Ð DIP Switch Factory Settings Table 9 Ð Power Exhaust Default Set PointsTable 10 Ð DIP Switch Conguration AIRFLOW AIRFLOW 3.20 Table 16 Ð Motor Limitations Table 15 Ð Fan Performance Ð Power ExhaustTable 17 Ð Air Quantity Limits Sequence of OperationTable 18 Ð User Dened Set Points GAS HEATING, VARIABLE AIR VOLUME VAV UNITS Fig. 43 Ð Space Temperature Reset Wiring Fig. 42 Ð Heat Interlock Relay WiringTable 19 Ð Smoke Control Modes Fig. 44 Ð Field-SuppliedSmoke Detector WiringFig. 45 Ð Door Latch SERVICEwith 2 Compressors with 2 Compressors and 2 UnloadersLubrication Fig. 46 Ð Spark Gap AdjustmentFig. 47 Ð Typical Gas Heating Section Evaporator Fan Service and ReplacementBelt Tension Adjustment Ð To adjust belt tension Evaporator Fan Performance AdjustmentFig. 49 Ð Evaporator-FanAlignment and Adjustment Evaporator-FanMotor ReplacementCondenser-FanAdjustment Gas Valve AdjustmentFig. 53 Ð Cooling Charging Chart Fig. 50 Ð Belt Tension AdjustmentFig. 51 Ð Condenser-FanAdjustment Fig. 52 Ð Cooling Charging ChartFig. 54 Ð Gas Valve Fig. 55 Ð Main Burner Removal Ð Adjustable Heat Anticipator Page Fig. 57 Ð Typical VAV 115-vControl Circuit Fig. 58 Ð Typical CV 115-vControl Circuit Fig. 59 Ð Typical VAV 24-vControl Circuit Fig. 60 Ð Typical CV 24-vControl Circuit TROUBLESHOOTING LPS Ð Low-PressureSwitch LEGEND FPS Ð Freeze Protection SwitchHPS Ð High-PressureSwitch LPS Ð Low-PressureSwitch LEGEND FPS Ð Freeze Protection SwitchHPS Ð High-PressureSwitch IGC Ð Integrated Gas Unit Controller Fig. 64 Ð IGC Control Heating and CoolingLEGEND IDM Ð Induced-DraftMotor Table 23 Ð Control Board LED Alarms Table 22 Ð IGC Control Board LED AlarmsPage PACKAGED SERVICE TRAINING PRESSURES TEMPERATURESPRE-START-UP ELECTRICALGENERAL