3. Servicing
Cycle components
SMGB0082 rev.1 - 07/2015
89
3
3.5.5
Replacement of the expansion valve
For R(C/H)ME models there are different number of electronic expansion valves. While R(C/H)ME-70AH1 have 3 elec-
tronic expansion valves (2 at the evaporation circuit plus 1 at the inlet of the economiser), R(C/H)ME-(40-50)AH1 models
have only two electronic expansion valves (at the evaporation circuit).
This is shown in the pictures below.
Evaporation circuit
Electronic expansion valve
(all models)
Economiser
Electronic expansion valve
(Only in R(C/H)ME-70AH1 models)
R(C/H)ME-70AH1
R(C/H)ME-(40-50)AH1
To proceed to the replacement of this component, follow the steps described below:
1
Collect the refrigerant as explained in section
“3.5.3 Recovering the refrigerant”.
2
Firmly hold the coil of the expansion valve and pull out
upward. It is easier to remove the expansion valve coil if
it is rotated while pulling it up.
Expansion
valve coil
Expansion
valve
3
Remove the brazed parts using a blowtorch and
previously cooling the pipe side with wet cloth in order to
avoid brazing material entering the pipe circuit.
Brazed
parts
