To Install The Outdoor Unit; To Provide Drainage; Piping Installation; Preparing Refrigerant Piping - Daikin RXM25A5V1B Installation Manual

5 Piping installation

(mm)
a 100 mm above expected level of snow
4.2.2

To install the outdoor unit

4.2.3

To provide drainage

NOTICE
If the unit is installed in a cold climate, take adequate
measures so that the evacuated condensate CANNOT
freeze.
NOTICE
If the drain holes of the outdoor unit are blocked up by a
mounting base or floor surface, place additional foot bases
≤30 mm under the outdoor unit's feet.
INFORMATION
For information on the available options, contact your
dealer.
1 Use a drain plug for drainage.
2 Use a Ø16 mm hose (field supply).
Installation manual
12
4× M8/M10
b
a
c
d
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
5 Piping installation
5.1

Preparing refrigerant piping

5.1.1

Refrigerant piping requirements

CAUTION
Piping and joints of a split system shall be made with
permanent joints when inside an occupied space except
joints directly connecting the piping to the indoor units.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant piping.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping diameter
Pipe outer diameter
Liquid piping
Ø6.4 mm (1/4")
Refrigerant piping material
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
6.4 mm (1/4") Annealed (O)
9.5 mm (3/8") Annealed (O)
Gas piping
Ø9.5 mm (3/8")
(a)
Thickness (t)
Ø
≥0.8 mm
t
RXM-A, ARXM-A
R32 split series
3P645642-7N – 2023.11