Daikin Super Multi NX 3MXS-G Series Engineering Data page 306

EDUS121131
Use the reducers supplied with the unit as described below.
(1) Connecting a pipe of φ1/2" to a gas pipe connection port for φ5/8":
(2) Connecting a pipe of φ3/8" to a gas pipe connection port for φ5/8":
(3) Connecting a pipe of φ3/8" to a gas pipe connection port for φ1/2":
● When using the reducer packing shown above, be careful not to overtighten
the nut, or the smaller pipe may be damaged. (about 2/3-1 the normal
torque)
● Apply a coat of refrigeration oil to the threaded connection port of the
outdoor unit where the flare nut comes in.
● Use an appropriate wrench to avoid damaging the connection thread by
overtightening the flare nut.
In order to protect the environment, be sure to pump
down when relocating or disposing of the unit.
1) Remove the valve cap from liquid stop valve and gas
stop valve.
2) Carry out forced cooling operation. See "Forced
Operation
3) After five to ten minutes, close the liquid stop valve
with a hexagonal wrench.
4) After two to three minutes, close the gas stop valve
and stop forced cooling operation.
Installation Manual
How to Use Reducers
No.1 No.2 No.3
φ5/8" φ1/2" φ5/8"
→ φ1/2" → φ3/8" → φ1/2"
Gasket (1) Gasket (2)
No. 1
Be sure to attach
No. 3
the gasket.
Connection port of outdoor unit
No. 5
No. 6
Be sure to attach the gasket.
Connection port of outdoor unit
No. 4
No. 2
Be sure to attach the gasket.
Connection port of outdoor unit
Pump Down Operation
No.4 No.5 No.6
φ1/2" φ5/8" φ5/8"
→ φ3/8" → φ3/8" → φ3/8"
Reduce and gasket
Inter-unit piping
Flare nut (for φ5/8")
Flare nut (for φ3/8")
Flare nut (for φ1/2")
Flare nut tightening torque
Flare nut for φ3/8"
Flare nut for φ1/2"
Flare nut for φ5/8"
Gas stop valve
Liquid stop
valve
Outdoor Unit
24.1-29.4 ft-lbf
36.5-44.5 ft-lbf
45.6-55.6 ft-lbf
Close
Hexagonal
wrench
Valve cap
2
301