Service manual

13
A: Refrigerant piping
Max. length
15m
Max. Height difference *
5m
*Height difference should be within
5m regardless of which unit,
indoor or outdoor position is high.
Indoor unit
Outdoor unit
Calculation : ✕g=15g/m✕(Refrigerant piping length (m)-7)
INDOOR UNIT OUTDOOR UNIT
Indoor
heat
exchanger
Indoor coil
thermistor
RT12
Distributor
Room
temperature
thermistor
RT11
(With heat insulation)
Refrigerant pipe
{15.88
(With heat insulation)
Refrigerant pipe
{9.52
Flared
connection
Stop valve
(with service port)
Stop valve
Compressor
Strainer
Capillary tube
{
3.0✕ { 2.0✕ 700
Capillary tube
Discharge
pressure
regulator
{
3.0✕ { 1.6✕ 350
Outdoor
heat
exchanger
MCF-24NV
E3
MUCF-24NV
E3
Accumulator
Refrigerant flow
If pipe length exceeds 7m, additional refrigerant (R22) charge is required.
MCF-13NV -
E4
MCF-18NV -
E3
MCF-24NV -
E3
850
1,500
2,150
7m
0
8m
15
9m
30
10m
45
11m
60
12m
75
13m
90
14m
105
15m
120
Refrigerant piping length (one way)
Outdoor unit
precharged
Models
Models
REFRIGERANT PIPING MAX. LENGTH & MAX. HEIGHT DIFFERENCE
MCF-13NV -
MCF-18NV -
MCF-24NV -
E3
E3
E4
Refrigerant piping
Max. length : m
A
15
Piping size O.D. : mm
Gas Liquid
{12.7
{6.35
{15.88
{9.52
Unit:mm
ADDITIONAL REFRIGERANT CHARGE (R22 : g)
OB270--1.qxp 4/13/01 2:59 PM Page 13