Air Purging; Airtight Test; Air Purge - Toshiba RAV-SM564ATP-E Manual De Instalación

Refrigerant pipe length
Single
Allowable pipe length (m)
Model
Total length L
SM56 3 0
SM80 3 0
Model
Liquid side
SM56 Ø 6 4 .
SM80 Ø 9 5 .
Outdoor unit
67-EN
1115150101_EN.indd 34 1115150101_EN.indd 34
Height difference (Indoor-outdoor H) (m)
Indoor unit: Upper Outdoor unit: Lower
3 0 3 0
3 0 3 0
Pipe diameter (mm)
Number of bent portions
Gas side
Ø 1 2 7 . 1 0 r o e l
Ø 1 5 9 . 1 0 r o e l
Figure of Single
Indoor unit
6

Air purging

Airtight test

Before starting an airtight test, further tighten the
spindle valves on the gas side and liquid side.
Pressurize the pipe with nitrogen gas charged from the
service port to the design pressure (4.15 Mpa) to
conduct the airtight test. Perform gas leak checks using
a leak tester for the HFC refrigerant.
After the airtight test is completed, evacuate the
nitrogen gas.
s s
s s

Air purge

With respect to the preservation of the terrestrial
environment, adopt "Vacuum pump" to purge air
(Evacuate air in the connecting pipes) when installing
the unit.
Do not discharge the refrigerant gas to the
atmosphere to preserve the terrestrial environment.
Use a vacuum pump to discharge the air (nitrogen,
etc.) that remains in the set. If air remains, the
capacity may decrease.
For the vacuum pump, be sure to use one with a
backflow preventer so that the oil in the pump does not
backflow into the pipe of the air conditioner when the
pump stops.
(If oil in the vacuum pump is put in an air conditioner
including R410A, it may cause trouble with the
refrigeration cycle.)
Compound pressure gauge
–101 kPa
(–76 cmHg)
Handle Low
Charge hose
(For R410A only)
Packed valve at gas side
Charge port
(Valve core
(Setting pin))
– 34 –
Vacuum pump
As shown in the figure, connect the charge hose after the
manifold valve is closed completely.
Attach the connecting port of the charge hose with a
projection to push the valve core (setting pin) to the charge
port of the set.
Open Handle Low fully.
Turn ON the vacuum pump. (*1)
Loosen the flare nut of the packed valve (Gas side) a little
to check that the air passes through. (*2)
Retighten the flare nut.
Execute vacuuming until the compound pressure gauge
indicates –101 kPa (–76 cmHg). (*1)
Close Handle Low completely.
Turn OFF the vacuum pump.
Leave the vacuum pump as it is for 1 or 2 minutes, and
check that the indicator of the compound pressure gauge
does not return.
Pressure gauge
Open the valve stem or valve handle fully.
(First, at liquid side, then gas side)
Gauge manifold
valve
Disconnect the charge hose from the charge port.
Handle High
(Keep fully closed)
Charge hose
Tighten the valve and caps of the charge port securely.
(For R410A only)
Vacuum pump adapter
*1: Use the vacuum pump, vacuum pump adapter, and gauge
for counterflow
manifold correctly referring to the manuals supplied with each
prevention
tool before using them.
(For R410A only)
Check that the vacuum pump oil is filled up to the specified line
of the oil gauge.
*2: When air is not charged, check again whether the connecting
Vacuum
port of the discharge hose, which has a projection to push the
pump
valve core, is firmly connected to the charge port.
EN
ID
68-EN
8/24/13 9:40 AM 8/24/13 9:40 AM