Hitachi UTOPIA RAS-4HVRP2E - Removing Electronic Expansion Valve

9 Servicing
RAS-(4-6)H(V)(R/N)(C/P)2E
SMGB0136 rev.0 - 07/2021
197
9
3
1
2
4
10 Remove the pipes from the reversing valve.
11 Seal the pipes with a tape to protect the reversing valve and the cycle assembly from dust.
12 Remove reversing valve -1- from the assemblies and install the new one.
13 Protect the new reversing valve -1- with a wet cloth.
14 Braze the connections -2- and -4- between the reversing valve -1- and the piping until the valve is properly installed.
15 Allow the brazing to cool down for a few minutes.
16 Remove all used protections and wet cloths.
17 Assembly the electrical box according to the item “9.3.6Removingelectricalbox”.
18 Move the cables until they are the same as they were originally.
19 Assembly the reversing valve coil -3- according to the item “9.3.9Removing4-wayvalvecoil”.
20 Charge new refrigerant according to the item “3.4Refrigerantcharge”.
21 Assembly the rear cover according to the item “9.3.4Removingbottomservicecoverandrearcover”.
22 Assembly the service cover according to the item “9.3.1Removingservicecover”.
9.3.13 Removing Electronic expansion valve
1 Disassembly the service cover according to the item “9.3.1Removingservicecover”.
2 Disassembly the rear cover according to the item“9.3.4Removingbottomservicecoverandrearcover”.
3 Disassembly the electrical box according to the item “9.3.6Removingelectricalbox”.
4 Collect the refrigerant according to the item “3.4Refrigerantcharge”.
5 Disassembly the Electronic expansion valve coil -1- according to the item “9.3.10Removingelectronicexpansion
valvecoil”.
6 Protect all the elements located around the expansion valve and the brazing area with a wet cloth.
7 Charge the stop valve for liquid with nitrogen and rell the expansion valve piping.
8 Heat the brazed connection -3- between the expansion valve -2- and the piping with a brazing unit until the brazing is
undone.
9 Remove the pipes from the expansion valve.
10 Seal the pipes with a tape to protect the reversing valve and the cycle assembly from dust.
11 Remove the electronic expansion valve -2- from the assemblies and install the new one.
12 Protect the new electronic expansion valve -2- with a wet cloth.