Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 48AK, 48EW, 48AW, 48EK Start-Upchecklist, Pre-Start-Up, Electrical, Temperatures, Pressures

Models: 48EJ 48AJ 48AK 48EK 48AY020-060 48AW 48EY024-068 48EW

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START-UP CHECKLIST

MODEL NO.: _________________________________	SERIAL NO.: ______________________________________
SOFTWARE VERSION (SEE FIG. 27): ____________	TECHNICIAN: ____________________________________
DATE: _______________________________________

PRE-START-UP:

VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT

VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

REMOVE ALL COMPRESSOR SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTRUCTIONS

VERIFY INSTALLATION OF ECONOMIZER HOOD

VERIFY INSTALLATION OF ALL OPTIONS AND ACCESSORIES

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK GAS PIPING FOR LEAKS

CHECK THAT RETURN-AIR FILTER AND OUTDOOR-AIR FILTERS ARE CLEAN AND IN PLACE

VERIFY THAT UNIT IS LEVEL WITHIN TOLERANCES FOR PROPER CONDENSER DRAINAGE

CHECK FAN WHEELS AND PROPELLERS FOR LOCATION IN HOUSING/ORIFICE, AND SETSCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

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

VERIFY THAT CRANKCASE HEATERS HAVE BEEN ON 24 HOURS BEFORE START-UP.

START-UP:

ELECTRICAL

SUPPLY VOLTAGE	L1-L2	__________ L2-L3 __________ L3-L1 __________
COMPRESSOR AMPS — COMPRESSOR NO. 1			L1	__________	L2	__________	L2 _________
COMPRESSOR AMPS — COMPRESSOR NO. 2			L1	__________	L2	__________	L2 _________
SUPPLY FANS AMPS	(CV)	________		EXHAUST FAN AMPS		__________
	(VAV)	________ *
*VAV fan supply amps reading must be taken with a true RMS meter for accurate readings.
TEMPERATURES
OUTDOOR-AIR TEMPERATURE		__________ F DB (Dry Bulb)
RETURN-AIR TEMPERATURE		__________ F DB__________			F WB (Wet Bulb)
COOLING SUPPLY AIR		__________ F
GAS HEAT SUPPLY AIR		__________ F

PRESSURES
GAS INLET PRESSURE	__________ IN. WG
GAS MANIFOLD PRESSURE	STAGE NO. 1 __________ IN. WG
REFRIGERANT SUCTION	CIRCUIT NO. 1 __________ PSIG
REFRIGERANT DISCHARGE	CIRCUIT NO. 2 __________ PSIG

STAGE NO. 2 __________ IN. WG

CIRCUIT NO. 2__________ PSIG

CIRCUIT NO. 2__________ PSIG

VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 93 AND 94.

CL-1

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Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK Start-Upchecklist, Pre-Start-Up, Electrical, Temperatures, Pressures

Contents

SAFETY CONSIDERATIONS CONTENTSINSTALLATION Step 1 — Provide Unit Support Step 11 — Position Power Exhaust/BarometricStep 4 — Make Unit Duct Connections Page Page Page NOTES Fig. 5 - Base Unit Dimensions - 48AJ,AK020-030 Fig. 6 — Base Unit Dimensions — 48AJ,AK035-050 Fig. 7 — Base Unit Dimensions — 48AJ,AK060 Fig. 8 — Base Unit Dimensions — 48AW,AY020-030 Fig. 9 — Base Unit Dimensions — 48AW,AY035-050 Fig. 10 — Base Unit Dimensions — 48W,AY060 Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034 Fig. 12 — Base Unit Dimensions — 48EJ,EK038-048 Fig. 13 — Base Unit Dimensions — 48EJ,EK054-068 Fig. 14 — Base Unit Dimensions — 48EW,EY024-034 Fig. 15 — Base Unit Dimensions — 48EW,EY038-048 Fig. 16 — Base Unit Dimensions — 48EW,EY054-068 Fig. 17 — Rigging Information Fig. 17 — Rigging Information cont Table 1A — Physical Data — 48AJ,AK,AW,AY Units UNIT 48AJ,AK,AW,AY Table 1B — Physical Data — 48EJ,EK,EW,EY Units UNIT 48EJ,EK,EW,EY UNIT 48EJ,EK,EW,EY Table 2 — Operating Weights 48AJ,AK,AW,AY Units48EJ,EK,EW,EY Units Table 3 — Evaporator Fan Motor Data Fig. 18 — Air Distribution — Thru-the-BottomFig. 19 — Air Distribution — Thru-the-Side Step 5 — Install Flue Hood Table 4 — 48A,E Series Staged Gas Implementation Fig. 23 — Field Gas PipingTable 6 - Thermistor Designations Fig. 24 — Supply-AirThermistor Connections Fig. 26 — Field Control Remote Start/Stop Fig. 25 — Indoor Air Quality Sensor ConfigurationStep 9 - Make Electrical Connections Fig. 27 — Control Board Diagram Table 7 — Electrical Data — 48AJ,AK,AW,AY Units UNIT SIZE 30.8/28.0 236.3/230.9 Table 8 — Electrical Data — 48EJ,EK,EW,EY Units 30.8 0.96 UNIT Fig. 28 - Field Power Wiring Connections LEGEND Thermostat Wiring CV Only- Install a Carrier-approvedaccessory thermostat assembly per current price pages according to the installation instructions included with the ac- cessory or these instructions. Locate the thermostat on a solid interior wall in the conditioned space to sense the average temperature LEGEND Fig. 33 — Field Control Temperature Sensor Fig. 32 — Field Control Thermostat WiringWiring CV or VAV Units Table 9 — CCN Connection Approved Shielded CablesStep 10 — Make Outdoor-AirInlet Adjustments Fig. 34 - Space Temperature Averaging WiringFig. 35 — Field HIR Heat Interlock Relay Wiring Fig. 37 - Economizer Hood Assembly Fig. 36 — Adding Seal Strip to Top of Hood SidesRight Side/Center Economizer Hood Shown Mounting Flange Fig. 38 — Adding Seal Strip to Sides of Hood TopFig. 39 — Adding Seal Strip to Back of Hood Top Fig. 40 — Adding Foam Strip to Cross MemberFilter Track Assembly Attached to Filter Track AssemblyFig. 43 - Mounting Angle Without Tabs Fig. 44 — Mounting Angle With Tabs Attached toFig. 47 - Wiring Connections for Solid-State Enthalpy Control HH57AC077Save screws CONTROL Fig. 49 - Economizer DetailsCONTROL POINT CURVE48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 Fig. 51 - Pressure Transducer LocationsFig. 52 - Motormaster III Control Baffle Details Fig. 53A — Motormaster III Sensor Location48AJ,AK,AW,AY020-030and 48EJ,EK,EW,EY024-034 48AJ,AK,AW,AY035 and 48EJ,EK,EW,EY038 Fig. 53B — Motormaster III Sensor LocationFig. 53C — Motormaster III Sensor Location 48AJ,AK,AW,AY040, 050 and 48EJ,EK,EW,EY048Fig. 54 — Side Return Air Conversion Step 13 — Field ModificationsFig. 56 — Wiring Field-SuppliedUnloaders for Constant Volume UnitsSTART-UP Fig. 57 — Toshiba TOSVERT130-E3VFD Factory-InstalledJumpers13.Replace jumper across terminals ST and CC 13.Replace jumper across terminals R and CC Optional Field Wiring LEGEND Typical Factory WiringSee below for building pressure to signal level Table 17 — DIP Switch Configuration Table 18 — DIP Switch Factory Settings AIRFLOW AIRFLOW AIRFLOW 1.06 2.15 3.18 4.81 AIRFLOW AIRFLOW AIRFLOW AIRFLOW AIRFLOW AIRFLOW Table 34 — Air Quality Limits Table 33 — Motor LimitationsSequence of Operation Table 36 - Software Control Link Points Table 35 — User Defined Set PointsThe Time Guard function maintains a minimum off time of 5 minutes, a minimum ON time of 10 seconds, and a minimum delay before starting the second compressor of 10 seconds Fig. 59 — Heat Interlock Relay Wiring Table 38 — Stage Gas System Inputs/Outputs Table 37 — Staged Gas System ComponentsTable 39 — Navigator Display Menu Structure Fig. 60 — Navigator DisplayFig. 61 — Space Temperature Reset Wiring Table 40 — Occupied Heat and Morning Warm-UpOperation and Controlling Factors Fig. 62 - Field-SuppliedSmoke Detector Wiring Table 41 — Smoke Control Modes Table 42 — Cooling Capacity Staging Table, CVUnits with 2 Compressors SERVICE Fig. 64 — Spark Gap AdjustmentFig. 63 — Door Latch Fig. 66 — Gas Heat Section Details Fig. 65 — Typical Gas Heating SectionFig. 67 — Evaporator-FanAlignment and Adjustment LubricationFig. 68 — Evaporator Fan Coupling Belt Tension Adjustment — To adjust belt tension Evaporator Fan Service and ReplacementEvaporator-FanMotor Replacement Condenser-FanAdjustmentFig. 71 — Cooling Charging Chart Gas Valve AdjustmentFig. 72 — Cooling Charging Chart 48EJ,EK,EW,EY024-034Fig. 74 — Cooling Charging Chart Fig. 73 — Cooling Charging Chart48EJ,EK,EW,EY054-068 48AJ,AK,AW,AY020-060Protective Devices LEGEND for Fig. 77-83— Typical Wiring SchematicsTABLE 1A Fig. 78 — Typical 48EK VAV 24-VControl Circuit Fig. 79 — Typical CV 24-VControl Circuit Fig. 80 — Typical 48EK VAV 115-VControl Circuit Fig. 81 — Typical 48EJ CV 115-VControl Circuit Page Page TROUBLESHOOTING HPS - High-PressureSwitch FPS — Freeze Protection SwitchLPS - Low-PressureSwitch LEGENDcompressor LEGEND FPS — Freeze Protection Switch HPS — High-PressureSwitchLPS — Low-PressureSwitch 8-Pass LEGEND FPS — Freeze Protection Switch HPS — High-PressureSwitchLPS — Low-PressureSwitch LEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve LPS — Low-PressureSwitch HPS - High-PressureSwitchLEGEND TXV — Thermostatic Expansion ValveLEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve LEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve Fig. 94 — IGC Control Heating and Cooling LEGEND IDM — Induced-DraftMotorIGC — Integrated Gas Unit Controller Table 45 — Control Board LED Alarms Table 44 - IGC Control Board LED AlarmsPage CALL FOR FREE CATALOG SERVICE TRAININGTEMPERATURES START-UPCHECKLISTPRE-START-UP ELECTRICALGENERAL