Refrigerant System Diagram - Mitsubishi Electric PUHZ-W85VAA Service Manual

8

REFRIGERANT SYSTEM DIAGRAM

PUHZ-W85VAA.UK
Water OUT
Plate HEX
TH34
TH6
Water IN
Symbol
COMP Compressor
H/P SW High pressure switch (63H)
REV/V Reversing (4-way) valve (21S4)
CHECK/V Charge plug
P-SENSOR Pressure sensor (63HS)
LEV-A Linear expansion valve -A
LEV-B Linear expansion valve -B
TH3 Liquid temperature thermistor
TH4 Discharge temperature thermistor
TH6 Plate HEX liquid temperature thermistor
TH7 Ambient temperature thermistor
TH8 Heat sink temperature thermistor
TH33 Comp. surface temperature thermistor For protection
TH34 Inlet water temperature thermistor
Rec Receiver
P/B Power circuit board
Plate HEX Plate Heat Exchanger
TH1, THW1 Outlet water temperature thermistor
OCH681
PUHZ-W85YAA.UK
CHECK/V(C)
CHECK/V(L)
Rec
Strainer3
(#100)
Strainer2
(#100)
LEV - B
Strainer4
(#100)
Parts name
DC inverter scroll compressor (Mitsubishi Electric Corporation)
For protection (OFF: 4.15MPa)
Change the refrigerant circuit (Heating / Cooling) and for Defrosting
High pressure/Low pressure/For production test use
For calculation of the condensing temperature from high pressure
Heating: Secondary LEV
Heating: Primary LEV
Heating: Evaporating temperature
For LEV control and for compressor protection
Heating: Sub cool liquid temperature
Cooling: Evaporating temperature
For fan control and for compressor frequency control
For power board protection
For freeze protection and for compressor frequency control
For accumulation of refrigerant
For flow temp. controller
MWA1-44DM
For flow temp. controller
P -SENSOR
REV/V
CHECK/V(H)
H/P SW
Muffler
TH4
TH33
COMP
LEV - A
Strainer1
(#100)
Cooling: Primary LEV
Cooling: Secondary LEV
11
Heat exchanger
TH7
TH3
P/B
TH8
Refrigerant flow in cooling
Refrigerant flow in heating
Detail
Cooling: Sub cool liquid temperature
<Reference>
System example