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TWA-SVX01A-EN

Table 1 - TWA Unit Electrical Data

Basic Unit Characteristics

Compressor Motor

Outdoor Fan Motor

Allowable

Minimum Maximum

Model

Electrical

Voltage

Circuit

Fuse

Amps

Amps

Number

Characteristics

Range

Ampacity

Size

Qty.

RLA

LRA

Qty. HP

FLA

LRA

TWA090A3

208-230/60/3

187-254

34.5

50

1

25.1

182.0

1

1/2

3.1

8.1

TWA090A4

460/60/3

414-506

18.1

25

1

13.2

94.9

1

1/2

1.6

3.7

TWA090AW

575/60/3

518-632

14.5

20

1

10.6

70.0

1

1/2

1.2

3.0

TWA075AD

380-415/50/3

380-415

12.6

20

1

8.8

90.0

1

1/2

1.6

3.7

TWA120A3

208-230/60/3

187-254

48.1

70

1

33.7

278.0

1

1

6.0

17.5

TWA120A4

460/60/3

414-506

23.3

35

1

16.5

124.0

1

1

2.7

7.0

TWA120AW

575/60/3

518-632

18.8

25

1

13.4

92.0

1

1

2.0

5.7

TWA100AD

380-415/50/3

380-415

22.5

35

1

15.8

124.0

1

1

2.7

7.0

TWA180B3

208-230/60/3

187-254

62.7

80

2

25.1

182.0

2

1/2

3.1

8.1

TWA180B4

460/60/3

414-506

32.9

45

2

13.2

94.9

2

1/2

1.6

3.7

TWA180BW

575/60/3

518-632

26.3

35

2

10.6

70.0

2

1/2

1.2

3.0

TWA155BD

380-415/50/3

380-415

28.4

35

2

11.2

94.9

2

1/2

1.6

3.7

TWA240B3

208-230/60/3

187-254

87.8

100

2

33.7

278.0

2

1

6.0

17.5

TWA240B4

460/60/3

414-506

42.5

50

2

16.5

120.0

2

1

2.7

7.0

TWA240BW

575/60/3

518-632

34.2

45

2

13.4

92.0

2

1

2.0

5.7

TWA200BD

380-415/50/3

380-415

41.0

50

2

15.8

124.0

2

1

2.7

7.0

Electrical Data

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Summary of Contents for TWA Series

Page 1: ...n Operation Maintenance Split System Heat Pump Condensers 7 1 2 20 Tons February 2004 Models 60 Hz TWA090A F TWA120A F TWA180B F TWA240B F TWA SVX01A EN 18 BC60D5 50 Hz TWA075AD F TWA100AD F TWA155BD F TWA200BD F ...

Page 2: ... a qualified service organization with qualified experienced HVAC technicians to properly diagnose and repair this equipment NOTICE Warnings and Cautions appear at appropriate sections throughout this manual Read these carefully WARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION Indicates a potentially hazardous situation which ...

Page 3: ... 9 Clearances 9 Snow Belt Mounting 10 Unit Mounting 10 Refrigerant Piping 11 Leak Check 12 System Evacuation 12 Refrigerant Charging Procedure 12 Electrical Wiring 13 Low Voltage Wiring 13 Typical Split System Heat Pump Diagram 14 Typical Field Wiring 15 Safety Controls 16 Installation Checklist 16 Sequence of Operation 17 Maintenance 19 Warranty 21 22 ...

Page 4: ... to refer to the specific model number serial number and DL number if applicable stamped on the unit nameplate Split System Condensing Unit Model Nomenclature T W A 0 9 0 A 1 0 0 E A 1 2 3 4 5 6 7 8 9 10 11 12 Digits 1 2 3 Product Type Digit 8 Electrical Characteristics TWA Split System Heat Pump 3 208 230 60 3 Outdoor Unit 4 460 60 3 W 575 60 3 Digits 4 5 6 Nominal Gross Cooling Capacity MBh D 38...

Page 5: ...SVX01A EN 5 Unit Dimensions Figure 1 TWA075A TWA090A Dimensional Data Connection Locations Clearances Corner Weights Figure 2 TWA100A TWA120A Dimensional Data Connection Locations Clearances Corner Weights ...

Page 6: ...6 TWA SVX01A EN Unit Dimensions Figure 3 TWA155B TWA180B Dimensional Data Connection Locations Clearances Corner Weights ...

Page 7: ...TWA SVX01A EN 7 Unit Dimensions Figure 4 TWA200B TWA240B Dimensional Data Connection Locations Clearances Corner Weights ...

Page 8: ...7 254 48 1 70 1 33 7 278 0 1 1 6 0 17 5 TWA120A4 460 60 3 414 506 23 3 35 1 16 5 124 0 1 1 2 7 7 0 TWA120AW 575 60 3 518 632 18 8 25 1 13 4 92 0 1 1 2 0 5 7 TWA100AD 380 415 50 3 380 415 22 5 35 1 15 8 124 0 1 1 2 7 7 0 TWA180B3 208 230 60 3 187 254 62 7 80 2 25 1 182 0 2 1 2 3 1 8 1 TWA180B4 460 60 3 414 506 32 9 45 2 13 2 94 9 2 1 2 1 6 3 7 TWA180BW 575 60 3 518 632 26 3 35 2 10 6 70 0 2 1 2 1 2...

Page 9: ...aged material from the receiving location Take photos of the damage if possible The owner must provide reason able evidence that the damage did not occur after delivery Notify the carrier s terminal of damage immediately by phone and by mail Request an immediate joint inspection of the damage by the carrier and the consignee Notify the sales representative and arrange for repair Do not repair the ...

Page 10: ...it weights are given in Table 2 The unit should be elevated on a level field fabricated four inch steel or wood 4 x 4 mounting frame Complete the frame and secure it into position before lilfting the unit to the roof The mounting frame must support a minimum of three of the unit s four sides and should span roof supports to distribute the load on the roof Figure 4 Roof Mounted Unit Ensure that the...

Page 11: ...ble contamination 1 Remove the compressor service access panel 2 Locate the liquid and suction line service valves Check that the piping connection stubs on the valves Figure 5 line up properly with the holes in the unit cabinet Figure 5 3 Remove the refrigerant connection seal caps and open the service valve slowly to release the nitrogen from the unit CAUTION Do not remove the seal caps from ref...

Page 12: ...n one 1 minute then evacuation is incomplete or the system has a leak 6 If vacuum gauge does not rise above 500 microns in one 1 minute the evacuation should be complete 7 With vacuum pump and micron gauge blanked off open valve on R 22 cylinder and allow refrigerant pressure to build up to about 40 psig 8 Close valve on the R 22 supply cylinder Close valves on manifold gauge set and remove refrig...

Page 13: ...ove the charging system from the unit and close the opening in the bottom of the control box with the pivotal cover before attempting to replace access panel 6 Replace all panels Electrical Wiring TWA field wiring consists of providing power supply to the unit installing the system indoor thermostat and providing low voltage system interconnecting wiring Access to elec trical connection locations ...

Page 14: ...14 TWA SVX01A EN Figure 7 Typical Split System Heat Pump Refrigerant Circuits Installation ...

Page 15: ...NES IS TO BE FURNISHED AND INSTALLED ELECTRIC HEAT ADD 1 ADDITIONAL WIRE 24 VOLTS BY THE CUSTOMER ALL CUSTOMER SUPPLIED WIRING MUST BE COPPER ONLY AND MUST CONFORM TO NEC AND LOCAL ELECTRICAL CODES CODES MAY REQUIRE LINE OF SIGHT BETWEEN DISCONNECT SWITCH AND UNIT 2 WHEN ELECTRIC HEATER ACCESSORY IS USED SINGLE POINT POWER ENTRY OR DUAL POINT POWER ENTRY IS FIELD OPTIONAL SINGLE POINT POWER ENTRY ...

Page 16: ...sor motor windings It will shut off the compressor if the temperature or current of the compressor motor windings exceeds it s design trip temperature Note The IOL will put the compressor back in opera tion once the compressor motor heat has dropped below the trip setting however a check of the refrigerant and electrical system should be made to determine the cause and be corrected System Pre Star...

Page 17: ...us energized This signal causes an output to the switch over valve SOV B placing it in the cooling mode System Start Procedure Heating Mode With the system switch on the thermostat set to the HEAT position and the room temperature drops approximately 1 degrees below the thermostat setting a heating cycle is initiated by closing of the TSH 1 contacts When closed these contacts supply power from R t...

Page 18: ...ns unchanged at this point The outdoor thermostats if used are by passed System Start Procedure T Thermistor Circuit The T circuit used with both the manual and automatic changeover thermostats in conjunction with heat pump applications is used for anticipation of outdoor condition changes This thermistor varies the resistance as temperature varies in an inverse proportional relationship It is loc...

Page 19: ...d or dirt from the unit casing 4 Remove corrosion from any surface and repaint Check the gasket around the control panel door to insure it fits cor rectly and is in good condition to prevent water leakage 5 Inspect the evaporator fan belt If it is worn or frayed re place it 6 Inspect the control panel wiring to insure that all connec tions are tight and that the insulation is intact Lubricate the ...

Page 20: ...Log Date Ambient Evaporator Temp Entering Air Compressor Superheat Subcooling F Dry Wet Suction Discharge Circuit 1 Circuit 1 Bulb Bulb Pressure Pressure F F Perform each inspection once per month during cooling season while unit is operating ...

Page 21: ... and liabilities under this warranty are limited to furnishing F O B factory or ware house at the warrantor designated shipping point freight allowed toBuyer s city or port of export for shipments outside the con terminous United States a replacement product or at the option of the warrantor parts for the repair of the product not conforming to this warranty and which have been returned to the war...

Page 22: ...ntor s products not conforming to this warranty Warrantor shall not be obligated to pay for the cost of lost refrigerant No liability whatever shall attach to Warrantor until said products have been paid for and then said liability shall be limited to the purchase price of the equipment shown to be defective THE WARRANTY AND LIABILITY SET FORTH HEREIN ARE IN LIEU OF ALL OTHER WARRANTIES AND LIABIL...

Page 23: ...23 TWA SVX01A EN ...

Page 24: ...cy of continuous product and product data improvement and reserves the right to change design and specifications without notice Literature Order Number File Number Supersedes Stocking Location TWA SVX01A EN New Webb Mason SV UN TWA SVX01A EN 2 04 ...

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