Protection Against Contamination When Installing Pipes - Daikin CMSQ200A7W1B 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 One outdoor unit installed
(See figure 6)
■
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
Unit type
CMSQ200
(mm)
CMSQ250
(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 12.
A B C
166 16 199
156 17 188
4 Branching the refrigerant piping
■ For installation of the refrigerant branching kit, refer to the
installation manual delivered with the kit.
(See figure 14)
1 Horizontal surface
Follow the conditions listed below:
- Mount the refnet joint so that it branches either
horizontally or vertically.
- Mount the refnet header so that it branches horizontally.
■ Installation of the multi connection piping kit
(See figure 18)
- Install the joints horizontally, so that the caution label (1)
attached to the joint comes to the top.
Do not tilt the joint more than 15° (see view A).
Do not install the joint vertically (see view B).
- Make sure that the total length of the piping connected to
the joint is absolute straight for more than 500 mm. Only
if a straight field piping of more than 120 mm is
connected, more than 500 mm of straight section can be
ensured.
- Improper installation may lead to malfunction of the
outdoor unit.
5 Piping length restrictions
Make sure to perform the piping installation within the range of
the maximum allowable pipe length, allowable level difference
and allowable
"6.6. Example of connection" on page
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
1
After all the piping has been connected, make sure there is
no gas leak. Use nitrogen to perform a gas leak check.
D
246
247
length after branching
7.
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
as indicated in
Protection method
".
CMSQ200+250A7W1B
Air conditioning system
4PW47543-1C – 07.2010