Refrigerant System Diagram; Connection Without Branch Box - Mitsubishi Electric PUMY-P250YBM Technical & Service Manual

7-2. REFRIGERANT SYSTEM DIAGRAM

7-2-1. Connection without Branch box

Service port
Refrigerant
Gas pipe
<280: 7/8, 335: 1>
Ball valve
Stop valve
Refrigerant
Liquid pipe
<280: 3/8, 335: 1/2>
Service port
PUMY-P250/300YBM
Refrigerant piping specifications <dimensions of flared connector>
Capacity
Indoor unit
Outdoor unit
Note:
When connecting the CONNECTION KIT (PAC-LV11M-J) and an M-series indoor unit, refer to the
installation manual for the CONNECTION KIT.
OCH760
4 way valve
Strainer
Thermistor (TH6)
<Suction pipe>
Low pressure
Strainer
sensor (63LS)
Check valve
<Low pressure>
Restrictor
valve
Thermistor (TH2)
<HIC pipe>
HIC
Strainer
Strainer
Strainer
LEV-B
Outdoor unit
Item
P15, 20, 25, 32, 40, 50
P63, 80, 100, 125, 140
P200
P250
P250
P300
* Use ø12.7 when the farthest piping length is longer than 90 m or PEFY-P200 or/and 250 is/are connected.
Solenoid High pressure
valve(SV1) sensor (63HS)
Oil separator
Strainer
High pressure
Capillary
switch (63H)
Solenoid
tube 2
Capillary
valve (SV3)
tube 1
Strainer
Accumulator
Strainer
LEV-A
Capillary tube 1
ø2.4×ø0.8×L600
Liquid piping
ø6.35 <1/4>
ø9.52 <3/8>
ø9.52 <3/8>
ø9.52 <3/8>
ø9.52 <3/8> *
ø12.7 <1/2>
25
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor (TH7)
Check valve
<Ambient>
<High pressure>
Distributor
Thermistor (TH4)
<Compressor>
Compressor
Unit: mm
Capillary tube 2
ø4.0×ø3.0×L220
Unit: mm <in>
Gas piping
ø12.7 <1/2>
ø15.88 <5/8>
ø19.05 <3/4>
ø22.2 <7/8>
ø22.2 <7/8>
ø25.4 <1>
Thermistor (TH3)
<Outdoor liquid pipe>