Daikin R32 Split Series Manual de instalación - Página 6

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Daikin R32 Split Series Manual de instalación
4 Installation
a
Drain port
b
Bottom frame
c
Drain plug
d
Hose (field supply)
To close the drain holes and attach the drain
socket
NOTICE
In cold areas, do NOT use a drain socket, hose and caps
(1, 2) with the outdoor unit. Take adequate measures so
that the evacuated condensate CANNOT freeze.
1 Install drain caps 1 and 2 (accessory). Make sure the edges of
the drain caps close off the holes completely.
a
b
a
Bottom frame
b
Drain cap
2 Install the drain socket.
a
b
c
b
b
a
a
a
Drain hole. Install a drain cap (2).
b
Drain hole. Install a drain cap (1).
c
Drain hole for drain socket
4.2

Connecting the refrigerant piping

DANGER: RISK OF BURNING
4.2.1
Connections between outdoor and indoor
unit using reducers
INFORMATION
▪ Use reducers in case the indoor unit refrigerant piping
diameter does NOT match the outdoor unit refrigerant
piping diameter.
▪ Apply the reducers on the indoor unit side.
▪ ALWAYS use the same piping diameters as the
connections on the outdoor unit.
▪ See the installation manual of the reducers option.
Coat the threaded connection port of the outdoor unit where the flare
nut comes in with refrigeration oil.
NOTICE
Use an appropriate wrench to avoid damaging the
connection thread by overtightening the flare nut. Be
careful NOT to overtighten the nut, or the smaller pipe may
be damaged (about 2/3-1× the normal torque).
4.2.2
To connect the refrigerant piping to the
outdoor unit
▪ Piping length. Keep field piping as short as possible.
▪ Piping protection. Protect the field piping against physical
damage.
Installation manual
6
b
a
c
d
WARNING
Connect the refrigerant piping securely before running the
compressor. If the refrigerant piping is NOT connected and
the stop valve is open when the compressor is run, air will
be sucked in. This will cause abnormal pressure in the
refrigeration cycle, which may result in equipment damage
and even injury.
CAUTION
▪ Use the flare nut fixed to the unit.
▪ To prevent gas leakage, apply refrigeration oil only to
the inside of the flare. Use refrigeration oil for R32.
▪ Do NOT reuse joints.
1 Connect the liquid refrigerant connection from the indoor unit to
the liquid stop valve of the outdoor unit.
a
c
b
a
Liquid stop valve
b
Gas stop valve
c
Service port
2 Connect the gas refrigerant connection from the indoor unit to
the gas stop valve of the outdoor unit.
NOTICE
It is recommended that the refrigerant piping between
indoor and outdoor unit is installed in a ducting or the
refrigerant piping is wrapped with finishing tape.
4.3

Checking the refrigerant piping

4.3.1

To check for leaks

NOTICE
Do NOT exceed the unit's maximum working pressure (see
"PS High" on the unit name plate).
NOTICE
Make sure to use a recommended bubble test solution
from your wholesaler. Do not use soap water, which may
cause cracking of flare nuts (soap water may contain salt,
which absorbs moisture that will freeze when the piping
gets cold), and/or lead to corrosion of flared joints (soap
water may contain ammonia which causes a corrosive
effect between the brass flare nut and the copper flare).
1 Charge the system with nitrogen gas up to a gauge pressure of
at least 200  kPa (2  bar). It is recommended to pressurize to
3000 kPa (30 bar) in order to detect small leaks.
2 Check for leaks by applying the bubble test solution to all
connections.
3 Discharge all nitrogen gas.
4.3.2

To perform vacuum drying

DANGER: RISK OF EXPLOSION
Do NOT start the unit if it is vacuumed.
1 Vacuum the system until the pressure on the manifold indicates
−0.1 MPa (−1 bar).
2 Leave as is for 4-5 minutes and check the pressure:
RZAG35~60A2V1B
R32 split series
3P548265-1 – 2018.08