Daikin GYEQ20AN Service Manual page 48

Installation Work Manual
7
Installing the Outdoor Unit
Bringing the outdoor unit into the room
Decide in advance how you will transport the product to its installation location.
Follow the instructions on how to transport the outdoor unit indicated on the paper attached to the
front face of the outdoor unit.
Preparing the refrigerant piping
Any tools and instruments used to handle the refrigerant and the refrigerating machine oil during installation
work should be designed specifically for use with the R410A.
Piping materials
The refrigerant piping used should be made of the following material:
Material: Phosphate deoxidized seamless copper tube
Pipe size
Selecting the correct pipe size
Piping between the outdoor unit and refrigerant branch kit
The size of the pipes used should match the outdoor unit's
pipe size.
When you use long pipes (with an equivalent length of 90
m or greater), you can use a gas pipe that is one size
larger than the pipe diameter indicated in the table on the
right hand to minimize loss of cooling performance due to
the pipe length. (Reducer joints should be locally procured
if needed.) However, only when the outdoor unit is installed
in a location higher than the indoor unit with a height
difference more than 50 m but less than 70 m, using a gas
pipe that is one size larger than the pipe diameter to
minimize the loss of performance with long pipes is not
possible.
37
Size
Wall thickness t0.8 t0.8
7 Installing the Outdoor Unit
t0.8 t1.0 t1.0 t1.0
Pipe size (outside diameter x minimum wall
Outdoor
unit
Suction gas
capacity
GYEQ20AN
GYEQ30AN
– 9 –
SiAUY361411EA
t1.0 t1.0 t1.1 t1.4
thickness) (in mm)
Discharge Fluid pipe
pipe gas pipe
0FGHP-EN0801 DGJ002
Device Overview