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NOTE: If using existing indoor coil and changing 

refrigerant types, ensure the indoor coil and 

metering device are compatible with the type 

of refrigerant being used. If new indoor coil is 

required check spec sheet or AHRI for approved 

coil. If system is being replaced due to compressor 

electrical failure, assume acid is in system. Refer 

to Service Procedure S-115 Compressor Burnout 

in service manual for clean-up procedure.

Burying Refrigerant Lines

If burying refrigerant lines can not be avoided, use the 

following checklist.

1.  Insulate liquid and suction lines separately.

2. 

Enclose all underground portions of the refrigerant 

lines in waterproof material (conduit or pipe) sealing 

the ends where tubing enters/exits the enclosure.

3.  If the lines must pass under or through a concrete 

slab, ensure lines are adequately protected and 

sealed.

Refrigerant Line Connections

IMPORTANT: To avoid overheating the service 

valve, TXV valve, or filter drier while brazing, 

wrap the component with a wet rag, or use a 

thermal heat trap compound. Be sure to follow 

the manufacturer’s instruction when using the 

heat trap compound. Note: Remove Schrader 

valves from service valves before brazing tubes 

to the valves. Use a brazing alloy of 2% minimum 

silver content. Do not use flux.

Torch heat required to braze tubes of various sizes is 

proportional to the size of the tube. Tubes of smaller size 

require less heat to bring the tube to brazing temperature 

before adding brazing alloy. Applying too much heat to any 

tube can melt the tube. Service personnel must use the 

appropriate heat level for the size of the tube being brazed.

 

NOTE:

 The use of a heat shield when brazing is 

recommended to avoid burning the serial plate or 

the finish on the unit.

1.  The ends of the refrigerant lines must be cut square, 

deburred, cleaned, and be round and free from nicks 

or dents. Any other condition increases the chance of 

a refrigerant leak. 

2.   “Sweep” the refrigerant line with nitrogen or inert gas 

during brazing to prevent the formation of copper-

oxide inside the refrigerant lines. The POE oils used 

in R-410A applications will clean any copper-oxide 

present from the inside of the refrigerant lines and 

spread it throughout the system. This may cause a 

blockage or failure of the metering device.

3.  After brazing, quench the joints with water or a wet 

cloth to prevent overheating of the service valve.

4. 

Ensure the filter drier paint finish is intact after 

brazing. If the paint of the steel filter drier has 

been burned or chipped, repaint or treat with a rust 

preventative. This is especially important on suction 

line filter driers which are continually wet when the 

unit is operating.

NOTE: Be careful not to kink or dent refrigerant 

lines. Kinked or dented lines will cause poor 

performance or compressor damage. 

Do NOT make final refrigerant line connection until plugs 

are removed from refrigerant tubing.

NOTE: Before brazing, verify indoor piston size by 

checking the piston kit chart packaged with indoor 

unit.

Standing Pressure Test (Recommended before 

System Evacuation)

WARNING

To avoid the risk of fire or explosion, never use oxygen, 

high pressure air or flammable gases for leak testing of a 

refrigeration system.

WARNING

To avoid possible explosion, the line from the nitrogen 

cylinder must include a pressure regulator and a pressure 

relief valve. The pressure relief valve must be set to open at 

no more than 450 psig.

Using dry nitrogen, pressurize the system to 450 PSIG. 

Allow the pressure to stabilize and hold for 15 minutes 

(minimum). If the pressure does not drop below 450 PSIG 

the system is considered leak free. Proceed to system 

evacuation using the Deep Vacuum Method. If after 15 

minutes the pressure drops below 450 PSIG follow the 

procedure outlined below to identify system leaks. Repeat 

the Standing Pressure Test.

Leak Testing (Nitrogen or Nitrogen-Traced)

WARNING

To avoid the risk of fire or explosion, never use oxygen, 

high pressure air or flammable gases for leak testing of a 

refrigeration system.

WARNING

To avoid possible explosion, the line from the nitrogen 

cylinder must include a pressure regulator and a pressure 

relief valve. The pressure relief valve must be set to open at 

no more than 450 psig.

Содержание ASXH3 Series

Страница 1: ...DO NOT BYPASS SAFETY DEVICES SHIPPING INSPECTION Always keep the unit upright laying the unit on its side or top may cause equipment damage Shipping damage and subsequent investigation is the respons...

Страница 2: ...on Ensure the foundation is sufficient to support the unit A concrete slab raised above ground level provides a suitable base ROOFTOP INSTALLATIONS If it is necessary to install this unit on a roof st...

Страница 3: ...igid wire or straps that would come in contact with the tubing Use an insulated or suspension type hanger Keep both lines separate and always insulate the suction line These sizes are recommended for...

Страница 4: ...rmation of copper oxide inside the refrigerant lines The POE oils used in R 410A applications will clean any copper oxide present from the inside of the refrigerant lines and spread it throughout the...

Страница 5: ...e system mechanical seals 2 Evacuate the system to less than 500 microns 3 Isolate the pump from the system and hold vacuum for 10 minutes minimum Typically pressure will rise slowly during this perio...

Страница 6: ...l panel cover THERMOSTAT SINGLE STAGE HEATING WITH SINGLE STAGE COOLING Single Stage Thermostat with Two Low Voltage Wires to Remote SYSTEM START UP CAUTION POSSIBLE REFRIGERANT LEAK To avoid a possib...

Страница 7: ...Superheat adjustments should not be made until indoor ambient conditions have stabilized This could take up to 24 hours depending on indoor temperature and humidity Before checking superheat run the...

Страница 8: ...0 13 15 19 23 24 25 6 9 11 15 20 21 23 7 12 17 18 20 8 13 15 16 7 10 11 13 7 8 10 7 8 7 105 110 115 75 80 85 90 95 100 System Superheat Targets for Piston Match ups 1 0 F Indoor Wet Bulb Temperature F...

Страница 9: ...D SUCTION PRESSURE TEMPERATURE CHART LIQUID PRESSURE SATURATED LIQUID TEMPERATURE F PSIG R 410A 200 70 210 73 220 76 225 78 235 80 245 83 255 85 265 88 275 90 285 92 295 95 305 97 325 101 355 108 375...

Страница 10: ...y ADVANCED ADJUSTMENT RECOMMENDATIONS NOTE Units matched with indoor coils equipped with a TXV should be charged by Subcooling only SUPERHEAT FORMULA SUCTION LINE TEMPERATURE SATURATED SUCTION TEMPERA...

Страница 11: ...n Motor Repair or Replace Shorted or Grounded Fan Motor Test Motor Windings Improper Cooling Anticipator Check Resistance of Anticipator Shortage or Refrigerant Test For Leaks Add Refrigerant Restrict...

Страница 12: ...is important to keep the outdoor coil clean Dirt leaves or debris could also restrict the airflow If cleaning of the outdoor coil becomes necessary hire a qualified servicer Inexperienced people coul...

Страница 13: ...tdoor Unit Suction Circuit Pressure Suction Line Temperature PSIG TEMP F Liquid Circuit Pressure Liquid Temperature PSIG TEMP F Outdoor Air Temperature Dry bulb Wet bulb DB F WB F SUPERHEAT SUBCOOLING...

Страница 14: ...14 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Страница 15: ...15 THIS PAGE IS LEFT INTENTIONALLY BLANK...

Страница 16: ...ration Amana Brand products http www amana hac com product registration You can also scan the QR code on the right for the product brand you purchased to be directed to the Product Registration page N...

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