Carrier 50SX024-060, 50SS018-060 owner manual Pre-Start-Up, Tran

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LEGEND

CÐ Contactor, Compressor COM Ð Common

CTD

Ð

Compressor Time Delay

FU

Ð

Fuse

HR

Ð

Heater Relay

ICM

Ð

Integrated Control Motor

IFO

Ð

Indoor Fan On

PL

Ð

Plug

TRAN

Ð

Transformer

 

 

Field Splice

 

 

Terminal (Marked)

Terminal (Unmarked)

Terminal Block

Splice

Factory Wiring Field Control Wiring Field Power Wiring Accessory or Optional Wiring

To Indicate Common Potential Only. Not to Represent Wiring

Fig. 34 Ð Unit 50SX048,060 Ð 208/230-3-60 Integrated Control Motor Wiring Schematic

PRE-START-UP

Failure to observe the following warnings could result in serious personal injury:

1.Follow recognized safety practices and wear protec- tive goggles when checking or servicing refrigerant system.

2.Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured.

3.Do not remove compressor terminal cover until all electrical sources are disconnected.

4.Relieve all pressure from both high- and low- pressure sides of the system before touching or dis- turbing anything inside terminal box if refrigerant leak is suspected around compressor terminals. Use ac- cepted methods to recover refrigerant.

5.Never attempt to repair soldered connection while re- frigerant system is under pressure.

6.Do not use torch to remove any component. System contains oil and refrigerant under pressure. To re- move a component, wear protective goggles and pro- ceed as follows:

a.Shut off electrical power to unit.

b.Relieve all pressure from system using both high- and low-pressure ports. Use accepted methods to recover refrigerant.

c.Cut component connecting tubing with tubing cut- ter and remove component from unit.

d.Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch ¯ame.

Use the Start-Up Checklist supplied at the end of this book and proceed as follows to inspect and prepare the unit for initial start-up:

1.Remove all access panels.

2.Read and follow instructions on all WARNING, CAU- TION, and INFORMATION labels attached to, or shipped with, unit.

Make the following inspections:

a.Inspect for shipping and handling damages such as bro- ken lines, loose parts, disconnected wires, etc.

b.Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a re- frigerant leak. Leak-test all refrigerant tubing connec- tions using electronic leak detector, or liquid-soap so- lution. If a refrigerant leak is detected, see following Check for Refrigerant Leaks section.

c.Inspect all ®eld- and factory-wiring connections. Be sure that connections are completed and tight.

d.Inspect coil ®ns. If damaged during shipping and han- dling, carefully straighten ®ns with a ®n comb.

3.Verify the following conditions:

a.Make sure that outdoor-fan blade is correctly posi- tioned in fan ori®ce. Leading edge of blade should be 2 in. back from condenser inlet grille or 1¤2 in. maxi- mum from fan deck.

b.Make sure that air ®lter(s) is in place.

c.Make sure that condensate drain pan and trap are filled with water to ensure proper drainage.

d.Make sure that all tools and miscellaneous loose parts have been removed.

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Contents Contents Safety ConsiderationsUnit Dimensions Units 50SS018-042 with Optional Base Rail Dimensions Units 50SS048,060 Without Base Rail Dimensions Units 50SS048,060 With Optional Base Rail Dimensions Units 50SX024-036 Without Base Rail Dimensions Units 50SX024-036 With Optional Base Rail Dimensions Units 50SX042-060 Without Base Rail Matl CharacteristicsCond Ð Unit Electrical Unit WTDimensions Units 50SX042-060 With Optional Base Rail Corner WT Lb/Kg 50SX Curb Part Number``A Provide Unit Support Receiving and InstallationCheck Equipment Suggested Rigging for Units Without Base Rail Physical Data Ð Unit 50SS Physical Data Ð Unit 50SXArea Not To Be Drilled SizeEvaporator Coil Access Panel Indoor Blower Access Panel Field-Fabricated Duct Cover Provide for Condensate Disposal Filler Bracket and Blower ShelfInstall Electrical Connections Condensate TrapÐ Electrical Data Ð 50SS Units Ð Electrical Data Ð 50SX Units Typical Duct Panel Knockouts IFO CTDICM PRE-START-UP TranStart-Up Cooling Section and Make Adjustments START-UPTemp F Evap AIR Ð CFM Ð Superheat Charging Table, 50SS018Ð Superheat Charging Table, 50SS024 AIR ENTÐ Superheat Charging Table, 50SS042 Ð Superheat Charging Table, 50SS030Ð Superheat Charging Table, 50SS036 10001600 1995 Ð Superheat Charging Table, 50SX024Ð Superheat Charging Table, 50SX030 Ð Superheat Charging Table, 50SX048 Ð Superheat Charging Table, 50SX036Ð Superheat Charging Table, 50SX042 1200Superheat Required Suction-Tube Temperature FÐ Superheat Charging Table, 50SX060 Temp FOption Description Mode FAN Cooling HeatingTerminal Sequence of Operation Ð STD NON-ICM Units Unit Motor 460 V Horizontal Discharge Size SpeedUnit Motor AIR 460 Volt Horizontal Discharge 048² Unit Motor AIR 460 Volt Vertical Discharge SizeSpeed Delivery Unit 50SX FAN only CoolingFilter Pressure Drop in. wg Accessory Electric Heater Pressure Drop in. wgWet Coil Pressure Drop Unit Top Removal MaintenanceAir Filter Evaporator Blower and MotorCondenser Coil, Evaporator Coil, and Conden Condenser FanTroubleshooting Cooling Chart Symptom Cause RemedyTroubleshooting Cooling Chart Page Page Packaged Service Training Page III. START-UP Remove and Store in Job FilePreliminary Information