Nordyne *4BF-024KA Installation And User Manual Download Page 18 | Manualshive

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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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