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 30 

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 Operating Valve
(three-way valve)

 Charge hose
(Designed specifically for R410A)

Compound
pressure
gauge

Pressure
gauge

Gauge Manifold
(Designed specifically for R410A)

Handle Hi.

Vacuum pump

Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R410A)

Charge hose
(Designed specifically for R410A)

 Service Port

–0.1MPa
(–76cmHg)

 Handle Lo

 Operating Valve
 (two-way valve)

¡

 Always use a Torque wrench and back up spanner to tighten the flare nut.

(3)

Air purge

(a)

Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak.

(b)

Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below.

(c)

Open manifold valve handle Lo to its full width, and perform vacuum or evacuation.
Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa
(– 76 cmHg).

(d)

After completing vacuum operation, fully open service valve (Both gas and liquid sides) with hexagon headed wrench.

(e)

Check for possible leakage of gas in the connection parts of both indoor and outdoor.

Additional refrigerant charge

Additional refrigerant charge is not required at all.

(2)

Connection of refrigerant piping

Indoor unit side

¡

Connect firmly gas and liquid side
pipings by Torque wrench.

Outdoor unit side

¡

Connect firmly gas and liquid side
pipings by Torque wrench.

¡

Specified torquing value:

Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m)
Gas side

(ø9.52) : 34.0~42.0N·m (3.4~4.2kgf·m)
(ø12.7) : 49.0~61.0N·m (4.9~6.1kgf·m)

¡

Use one more spanner to fix the valve.

Spanner

(for fixing
the piping)

Torque
wrench

¡

Specified torquing value:

Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m)
Gas side

(ø9.52) : 34.0~42.0N·m (3.4~4.2kgf·m)
(ø12.7) : 49.0~61.0N·m (4.9~6.1kgf·m)

¡

Since the system uses service ports differing in diameter from those found on the conventional models, a charge hose (for R22)
presently in use is not applicable.
Please use one designed specifically for R410A

¡

Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system.
Oil running back into an air-conditioning system may cause the refrigerant cycle to break down.

(4)

Insulation of connecting portion

(a)

Cover the connecting portion of the refrigerant piping with the pipe cover and seal them.
If neglecting to do so, moisture occurs on the piping and water will drip out.

(b)

Finishing and fixing
(i)

Tie up the piping with wrapping tape, and shape it so

that it conforms to which the pipe is attached.

(ii)

Fix them with clamps as right figure.

Cover the exterior portion with cov-
ering tape and shape the piping so
it will match the contours of the
route that the piping to take. Also
fix the wiring and pipings to the
wall with clamps.

Insulation

Refrigerant piping

Electrical wiring

Covering tape

Drain hose

Tapping screw

Vinyl tape

To cover the connecting portion with
insulation materials, cut upper portion and
then seal it with insulation materials.

Опубликовано TopClimat