Johnson Controls HVWHP072B32S - Replacing Plate Heat Exchanger

SM-18006
4-23
MAINTENANCE
4.1.10 Replacing Plate Heat Exchanger
(1) Remove the service cover and front cover according to Section 4.1.1 “Removing Service Cover and
Front Cover”.
(2) Remove the upper cover according to Section 4.1.3 “Removing Upper Cover”.
(3) Remove the rear cover according to Section 4.1.4 “Removing Rear Cover”.
(4) Remove the pipe cover according to Section 4.1.5 “Removing Pipe Cover”.
(5) Remove the side cover L according to Section 4.1.6 “Removing Side Cover”.
(6) Remove the Ta thermistor according to Section 4.1.16 “Removing Thermistor for Entering Water
Temperature”.
(7) Remove the MV4 according to Section 4.1.12.1 “Removing Expansion Valve Coil (MV1, MV3, MV4,
MVB)”.
(8) RemovevescrewsthatattachtheHEXplates.
(9) DisconnecttheHEXrefrigerantinletpipefromreversingvalveanddisconnecttheSVB-PipeAssy
(Assembly)fromreceiver.Removethepipingfromthebrazingpart.
TURN OFF all POWER supply switches.
Tool PhillipsScrewdriver,Torch
Ta
Receiver
Plate
Heat Exchanger
MV4
Brazing Part
Brazing Part
HEX Plate
HEX Plate
HEX Refrigerant
Inlet Pipe
Reversing Valve