Whirlpool W4GH6 installation instructions Thermal Expansion Valve, Orifice

1.Disconnect power.

2.Remove the refrigerant from the existing system per the manufacturer’s instructions provided with the recovery system being used. Connect the R-22 gauge set is connected to both sides of the refrigerant system (as shown), and verify that the entire system is void of refrigerant in accordance with the manufacturer’s instructions provided with the recovery system being used.

3.Disconnect the liquid and vapor lines from the existing outdoor unit.

4.Remove the existing outdoor unit.

5.Set the new R-410A outdoor unit and connect the refrigerant lines. See “Connect Refrigerant Lines” steps 1 through 5. Do not evacuate the lines.

6.Remove the existing R-22 refrigerant flow control orifice or thermal expansion valve on the indoor coil, and use a field provided fitting to reconnect the lines.

Thermal Expansion Valve

A

A. Thermal expansion valve
Orifice
A		C
		D
		E
B	G	F
A. Distributor fitting	E. Orifice extension stub
B. Mounting flange	F. 0.812" brass hex nut
C. Piston orifice	G. Brass hex fitting
D. Ring seal (supplied)

7.Remove the caps from the suction and liquid pressure taps.

8.Remove the valve cores.

A

B

A. Suction pressure tap

B. Liquid pressure tap

9.Connect an R-22 cylinder with clean refrigerant to the suction pressure tap.

10.Connect the R-22 gauge set to the liquid line service valve and connect a recovery machine with an empty recovery tank to the gauge set.

11.Set the recovery machine for liquid recovery and start the recovery machine in accordance with the manufacturer’s instructions provided with the recovery system being used.

12.Open the gauge set valves to allow the recovery machine to run until a vacuum level less than 0" Hg (gauge pressure) is established in the existing system line set and indoor coil.

13.Invert the cylinder of clean R-22 and open its valve to allow liquid refrigerant to flow into the system through the vapor line valve.

14.After all of the liquid refrigerant has been recovered, switch the recovery machine to vapor recovery to allow the recovery machine to run until a vacuum level less than 0" Hg (gauge pressure) is established in the existing system line set and indoor coil in accordance with the manufacturer’s instructions provided with the recovery system being used.

NOTE: A single system flush should remove all of the mineral oil from the existing refrigerant lines and indoor coil. A second flushing may be done (using clean refrigerant) if insufficient amounts of mineral oil were removed during the first flush. A second flushing may be required to ensure that the maximum amount of oil is removed.

15.Close the valves on the inverted R-22 cylinder and gauge set.

16.Remove the recovery machine, gauges, R-22 cylinder and the field provided fitting installed in Step 6.

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