Protection Against Contamination When Installing Pipes - Daikin ERQ200A7W1B Installation Manual

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.
3 Piping connections
(See figure 10)
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.
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 pipe stop valve
2 Liquid pipe 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)
 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
1 Gas side accessory pipe
2 Cutting location
3 Gas side piping (field supply)
4 Base
Model
ERQ125
(mm)
ERQ200
(mm)
ERQ250
(mm)
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.
Installation manual
6
figure 11.
A B C
166 16 199
156 17 188
156 23 192
4 Piping length restrictions
4.1 Installation limitations
3
2
1
L1
1 Outdoor unit
2 Expansion valve kit
3 Air handling unit
L1
L2
A
B
(a) Below or above the outdoor unit.
4.2 How to calculate the additional refrigerant to be charged
Additional refrigerant to be charged R (kg)
R should be rounded off in units of 0.1 kg
R=(Total length (m) of liquid piping size at Ø9.5)x0.059
Determine the weight of refrigerant to be charged additionally
referring to the item
and fill in the amount on the fluorinated greenhouse gas label.
4.3 Diameters
Outdoor unit type
125
200
250
6.5. Protection against contamination when installing
pipes
- Take measures to prevent foreign materials like moisture and
contamination from mixing into the system.
More than a month
Less than a month
Regardless of the period
- Great caution is needed when passing copper tubes through
walls.
- Block all gaps in the holes for passing out piping and wiring
using sealing material (field supply). (The capacity of the unit
will drop and small animals may enter the machine.)
Example: passing piping out through the front
D
246
247
247
1
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak check.
A
L2
B
Max (m)
50
5
(a)
–5 / +5
(a)
–30 / +30
"Additional refrigerant charge" on page 13
Piping size (mm)
Gas
Ø15.9
Ø19.1
Ø22.2
Installation period
Pinch the pipe
Pinch or tape the pipe
1 Plug the areas marked with "
(When the piping is routed from the
front panel.)
2 Gas side piping
3 Liquid side piping
2 3
Min (m)
5
—
—
—
Liquid
Ø9.5
Ø9.5
Ø9.5
Protection method
".
ERQ125~250A7W1B
Inverter condensing unit
4PW51323-1D – 2022.10