Daikin ERX125A7W1B, Installation Manual

ERX125~250A7W1B
Inverter condensing unit
4PW30064-1D

Installation manual

5

6.4.

Connecting the refrigerant piping

1

Front connection or side connection

Installation of refrigerant piping is possible as front connection or
side connection (when taken out from the bottom) as shown in
the figure.

2

Removing the pinched piping

When connecting refrigerant piping to the outdoor unit, first
remove the pinched piping. Do not vent gases into the
atmosphere.
Removing of the pinched piping must be carried out according to
the following procedure:

1.

Make sure the stop valves are closed.

2.

Connect a charge hose to the service ports of all stop
valves.

3.

Recover the gas from the pinched piping.

4.

When all the gas is recovered from the pinched piping,
dissolve the brazing using a burner and remove the
pinched piping.

See 

figure 8

.

3

Piping connections

(See figure 9)

■

Front connection:
Remove the stop valve cover to connect.

■

Bottom connection:
Remove the knock holes on the bottom frame and route the
piping under the bottom frame.

■

Processing the gas side accessory pipe (2)
Only in case of connecting at lateral side, cut the gas side
accessory pipe (2) as shown in 

figure 16

.

4

Piping length restrictions

4.1 Installation limitations

1

Left-side connection

2

Front connection

3

Right-side connection

NOTE

Precautions when knocking out knock holes

■

Be sure to avoid damaging the casing

■

After knocking out the holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using the repair paint to prevent
rusting.

■

When passing electrical wiring through the knock
holes, wrap the wiring with protective tape to
prevent damage.

Any gas remaining inside the stop valve may blow off
the pinched piping, causing damage or injury.

1

Pinched piping

2

Stop valve

3

Service port

4

Point of melting the brazing metal

Precautions when connecting field piping.

■

Perform brazing at the gas stop valve
before brazing at the liquid stop valve.

■

Add brazing material as shown in the
figure.

■

Be sure to use the supplied accessory pipes when
carrying out piping work in the field.

■

Be sure that the field installed piping does not touch
other pipes, the bottom panel or side panel. Especially
for the bottom and side connection, be sure to protect
the piping with suitable insulation, to prevent it from
coming into contact with the casing.

1

2

3

A

Front connection
Remove the stop valve cover to connect.

B

Bottom connection:
Remove the knock holes on the bottom frame and route the piping 
under the bottom frame

1

Gas side stop valve

2

Liquid side stop valve

3

Service port for adding refrigerant

4

Gas side accessory pipe (1)

5

Gas side accessory pipe (2)

6

Liquid side accessory pipe (1)

7

Liquid side accessory pipe (2)

8

Brazing

9

Gas side piping (field supply)

10

Liquid side piping (field supply)

11

Punch the knockout holes (use a hammer)

1

Gas side accessory pipe

2

Cutting location

3

Gas side piping (field supply)

4

Base

Unit type

A

B

C

D

ERX125

(mm)

166

16

199

246

ERX200

(mm)

156

17

188

247

ERX250

(mm)

156

23

192

247

NOTE

■

When connecting the piping on site, be sure to
use the accessory piping.

■

Make sure the onsite piping does not come into
contact with other piping, the bottom frame or side
panels of the unit.

1

Outdoor unit

2

Valve kit

3

Air handling unit

Max (m)

Min (m)

L1

50

5

L2

5

—

A

–5 / +5

(a)

(a) Below or above the outdoor unit.

—

B

–30 / +30

(a)

—

L1

L2

A

B

1

2

3