Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 48EJ, EW, EK Protective Devices, Ð Belt Tension Adjustment, Ð Condenser-FanAdjustment

Models: EY024-048 EK 48EJ

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Fig. 50 Ð Belt Tension Adjustment

Fig. 50 Ð Belt Tension Adjustment

Fig. 51 Ð Condenser-Fan Adjustment

Fig. 52 Ð Cooling Charging Chart,

48EJ,EK,EW,EY024-034

Fig. 53 Ð Cooling Charging Chart,

48EJ,EK,EW,EY038-048

Main Burners Ð For all applications, main burners are factory set and should require no adjustment.

MAIN BURNER REMOVAL (Fig. 55)

1.Shut off (®eld-supplied) manual main gas valve.

2.Shut off power to unit.

3.Remove heating access panel.

4.Disconnect gas piping from gas valve inlet.

5.Remove wires from gas valve.

6.Remove wires from rollout switch.

7.Remove sensor wire and ignitor cable from IGC board.

8.Remove 2 screws securing manifold bracket to basepan.

9.Remove 4 screws that hold the burner support plate flange to the vestibule plate.

10.Lift burner assembly out of unit.

11.Reverse procedure to re-install burners.

Filter Drier Ð Replace whenever refrigerant system is exposed to atmosphere.

Protective Devices

COMPRESSOR PROTECTION

Overcurrent Ð Each compressor has one manual reset, cali- brated trip, magnetic circuit breaker. Do not bypass connec- tions or increase the size of the circuit breaker to correct trouble. Determine the cause and correct it before resetting the breaker.

Overtemperature Ð Each 06D type compressor (024-038 units) has an internal protector to protect it against excessively high discharge gas temperatures.

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Carrier 48EJ, EW, EK Protective Devices, Ð Belt Tension Adjustment, Ð Condenser-FanAdjustment, Ð Cooling Charging Chart

Contents

CONTENTS SAFETY CONSIDERATIONSINSTALLATION Step 1 Ð Provide Unit Support Step 10 Ð Position Power Exhaust/BarometricStep 3 Ð Field Fabricate Ductwork Instructions continued on pageFig. 1 Ð Roof Curb Sizes UNIT LEVELING TOLERANCES DIMENSIONSDegrees and Inches Fig. 2 Ð Roof Curb Sizes UNIT LEVELING TOLERANCES DIMENSIONSDegrees and Inches 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 WHEN RIGGING NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACEFig. 7 Ð Rigging Label Table 1 Ð Physical Data Table 1 Ð Physical Data cont Fig. 8 Ð Air Distribution Ð Thru-the-Bottom Fig. 9 Ð Air Distribution Ð Thru-the-SideFig. 10 Ð Flue Hood Location Fig. 11 Ð Combustion Fan Housing Location Fig. 12 Ð Condensate Drain Trap Piping DetailsTypical Roof Curb or Slab Mount Shown Fig. 13 Ð Field Gas Piping·support a eld test for eld checkout Fig. 14 Ð Field Control Remote Start/Stop Fig. 15 Ð Indoor Air Quality Sensor CongurationStep 8 Ð Make Electrical Connections Fig. 16 Ð Control Board Diagram Table 4 Ð Electrical Data Table 4 Ð Electrical Data cont Table 4 Ð Electrical Data cont UNITFig. 17 Ð Field Power Wiring Connections Fig. 18 Ð Control Box Diagram SizesFig. 19 Ð Control Box Diagram Sizes Fig. 21 Ð Field Control Temperature Sensor WiringFig. 20 Ð Field Control Thermostat Wiring CV or VAV UnitsFig. 22 Ð Space Temperature Averaging Wiring Table 5 Ð CCN Connection Approved Shielded CablesStep 9 Ð Make Outdoor-AirInlet Adjustments Table 6 Ð Color Code RecommendationsFig. 23 Ð Adding Seal Strip to Top of Hood Sides Fig. 25 Ð Adding Seal Strip to Mounting Flange ofHood Sides Fig. 26 Ð Adding Seal Strip to Hood Topto Filter Track Assembly Fig. 28 Ð Adding Foam Strip to Hood SideFig. 29 Ð Adding Foam Strip to Blockoff Baffle Fig. 30 Ð Mounting Angle Without Tabs AttachedFilter Track Assembly Fig. 31 Ð Mounting Angle With Tabs Attached toFig. 32 Ð Attaching Seal Strip to Filter Cover Fig. 34 Ð Wiring Connections for Solid-State Fig. 35 Ð Psychrometric Chart forEnthalpy Control HH57AC077 Enthalpy ControlFig. 37 Ð Barometric Relief Damper and Power Exhaust Mounting DetailsFig. 38 Ð Pressure Transducer Locations Fig. 39 Ð Motormaster III Baffle DetailsSTART-UP Fig. 41 Ð VFD Factory-InstalledJumpers Table 7 Ð VFD Supply Air Pressure Set PointDirect Digital Controls DIP Switch Congura Table 8 Ð Potentiometer Signal LevelsTable 9 Ð Power Exhaust Default Set Points Table 10 Ð DIP Switch CongurationTable 11 Ð DIP Switch Factory Settings AIRFLOW AIRFLOW 3.20 Table 15 Ð Fan Performance Ð Power Exhaust Table 16 Ð Motor LimitationsSequence of Operation Table 17 Ð Air Quantity LimitsTable 18 Ð User Dened Set Points GAS HEATING, VARIABLE AIR VOLUME VAV UNITS Fig. 42 Ð Heat Interlock Relay Wiring Fig. 43 Ð Space Temperature Reset WiringFig. 44 Ð Field-SuppliedSmoke Detector Wiring Table 19 Ð Smoke Control ModesSERVICE with 2 Compressorswith 2 Compressors and 2 Unloaders Fig. 45 Ð Door LatchFig. 46 Ð Spark Gap Adjustment LubricationEvaporator Fan Service and Replacement Belt Tension Adjustment Ð To adjust belt tensionEvaporator Fan Performance Adjustment Fig. 47 Ð Typical Gas Heating SectionEvaporator-FanMotor Replacement Condenser-FanAdjustmentGas Valve Adjustment Fig. 49 Ð Evaporator-FanAlignment and AdjustmentFig. 50 Ð Belt Tension Adjustment Fig. 51 Ð Condenser-FanAdjustmentFig. 52 Ð Cooling Charging Chart Fig. 53 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 LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchLPS Ð Low-PressureSwitch LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchLPS Ð Low-PressureSwitch Fig. 64 Ð IGC Control Heating and Cooling LEGEND IDM Ð Induced-DraftMotorIGC Ð Integrated Gas Unit Controller Table 22 Ð IGC Control Board LED Alarms Table 23 Ð Control Board LED AlarmsPage PACKAGED SERVICE TRAINING TEMPERATURES PRE-START-UPELECTRICAL PRESSURESGENERAL