23
8-2. REFRIGERANT SYSTEM DIAGRAM
PUMY-P125VMA
PUMY-P125YMA
PUMY-P125YMA
1
Flare
Flare
Strainer
#100
Strainer
#100
Strainer
(#100)
Strainer
Strainer
#100
(Refrigerant flow)
Cooling
Heating
#50
Strainer
Compressor
(MC)
Expansion valve (LEV(A), SLEV)
Accumulator
Overcooling heat exchanger
Outdoor heat exchanger
Service port
Service port
Thermistor TH2
(Saturation temperature
of suction pressure)
Capillary
tube 2
Capillary
tube 4
Dryer
Capillary
tube 3
Oil
separator
Check valve
(low pressure)
Thermistor THHS
(Radiator panel
temperature sensor)
W
Only PUMY-P125VMA
Thermistor THHS-A
Thermistor THHS-B
Thermistor TH6
(outdoor air
temperature sensor)
4-way
valve
High-pressure sensor
discharge pressure sensor
(63HS)
Capillary
tube 1
Check valve
(High pressure)
Electromag-
netic valve
(SV1)
Thermistor TH5
(piping temperature
monitoring and
determination)
Thermistor
TH1 (discharge
temperature
sensor)
Outdoor unit
Refrigerant Piping Specifications (dimensions of flared connector)
Indoor unit
Outdoor unit
Capacity
Item
20 , 25 , 32 , 40
50 , 63 , 71, 80
100 , 125
125
Liquid piping
Gas piping
{
6.35 <1/4”>
{
9.52 <3/8”>
{
9.52 <3/8”>
{
9.52 <3/8”>
{
12.7 <1/2”>
{
15.88 <5/8”>
{
19.05 <3/4”>
{
19.05 <3/4”>
(
{
4
O
{
3.0
O
L200)
O
2
{
2.5
O
{
0.6
O
L500
{
2.5
O
{
0.6
O
L500
PUMY-P125VMA
PUMY-P125YMA
PUMY-P125YMA
1
Capillary tube 1
(for return of oil from
oil separator)
Capillary tube 2
(for Evaporating
temperature detection)
Capillary tube 3
(for maintaining equilibrium
between upper and lower coils)
Concerning the Compressor
This system has a scroll compressor. This compressor uses a low pressure shell that typically has a temperature in the
range 30-80°C.
In addition, compressor wiring should be in the direction of rotation to the right. Wire colors are red (U), white(V),
black (W), yellow and yellow (thermal switch).
{
4
O
{
2.4
O
L360
Capillary tube 4
(for SV1)
OC272A--1.qxp 03.9.4 11:06 AM Page 23
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