Nordyne *4BF-024KA Installation And User Manual Download Page 13

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Cooling Charging Charts

Figure 4. Charging Chart for 2 Ton Units

*4BF-024KA Charging Chart

200

225

250

275

300

325

350

375

400

425

450

475

500

525

550

575

600

100

105

110

115

120

125

130

135

Liquid Temperature (F)

Liquid P

(

ig)

Remove refrigerant when above curve

Add refrigerant when below curve

Figure 5. Charging Chart for 3 Ton Units

*4BF-036KA Charging Chart

200

225

250

275

300

325

350

375

400

425

450

475

500

525

550

575

600

100

105

110

115

120

125

130

135

Liquid Temperature (F)

Liquid P

(

ig)

Remove refrigerant when above curve

Add refrigerant when below curve

Remove refrigerant when above curve

Add refrigerant when below curve

Summary of Contents for *4BF-024KA

Page 1: ...instructions and follow recommendations given If these suggestions don t eliminate your problem call your servicing contractor These instructions are primarily intended to assist quali ed individuals...

Page 2: ...2...

Page 3: ...ermostat Connections 9 Low Pressure Switch 9 High Pressure Switch 9 Comfort AlertTM Diagnostic Module 10 24VAC Power Wiring 10 Thermostat Demand Wiring 10 Interpreting the Diagnostic LED s 10 LED Desc...

Page 4: ...histypeofequipmenttofunctionasintended a two stage cooling heating thermostat is required Cooling Operation 1 Set the thermostat s system mode to COOL or AUTO and change the fan mode to AUTO See Figur...

Page 5: ...inuously The continuous indoor blower operation is typically used to circulate the indoor air to equalize a temperature unbalance due to a sun load cooking or replace operation Set the thermostat fan...

Page 6: ...hould not attempttointerprettheseinstructionsor install this equipment Failure to follow safety recommendations could result in possible damage to the equipment serious personal injury or death The in...

Page 7: ...on Installed equipment should be adequately secured to the cantilever mount and levelled prior to operation of the equipment GENERAL INFORMATION SplitSystemunitsaredesignedforusewithawide variety of f...

Page 8: ...Afteroutdoorandindoorunitplacementhasbeen determined routerefrigeranttubingbetweenthe equipmentinaccordancewithsoundinstallation practices Whenconnectingrefrigerant linesets together itisrecommendedth...

Page 9: ...is shown in Figure 2 Figure 2 Typical 2 Stage Air Conditioner with Variable Speed Air Handler G R W Thermostat Y1 C Air Handler A C OD Section Y1 W2 W1 O Y Y2 G R C Y2 Y2 R Y1 NOTE Jumper W1 and W2 to...

Page 10: ...ufacturer wiring instructions when replacing the module After the thermostat demand signal is connected verify that 24 VAC across Y C when demand is present Interpreting the Diagnostic LED s Whenanabn...

Page 11: ...nergize after a short period of time Feel the air being circulated by the indoor blower and verifythatitiswarmerthanambienttemperature Listen for any unusual noises If unusual sounds occur determine t...

Page 12: ...indoor blower de energize 3 Immediatelylowerthesetpointtemperatureof the thermostat to its original setting and verify that the indoor blower is energized and that the outdoor unit remains de energize...

Page 13: ...sure psig Remove refrigerant when above curve Add refrigerant when below curve Figure 5 Charging Chart for 3 Ton Units 4BF 036KA Charging Chart 200 225 250 275 300 325 350 375 400 425 450 475 500 525...

Page 14: ...Pressure psig Remove refrigerant when above curve Add refrigerant when below curve Figure 7 Charging Chart for 5 Ton Units 250 275 300 325 350 375 400 425 450 475 500 70 75 80 85 90 95 100 105 110 115...

Page 15: ...heck for excessively low thermostat setting Checkevaporatorair ow coilblockagesorreturnair lter Check ductwork or registers for blockage Faulty metering device Check TXV bulb installation size locatio...

Page 16: ...orprotectorresettimeduetoextreme ambient temperature Compressor windings are damaged Check compressor motor winding resistance Yellow ALERT Flash Code 6 Open Start Circuit Current only in run circuit...

Page 17: ...t cycling Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off ALERT Flash Code 5 6 or 7 displayed incorrectly Open Circuit Open Start...

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Page 20: ...AVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER 7091290 Replaces 7090240 Speci cations and illustrations subject to change without notice or incurring obligations Printed in U S A 11 09 7091290...

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