Johnson Controls YVAHP0721CW Series, Service Manual

Page: 150 / 416

4.2 Installation Position
1. Horizontal Installation
Locate the “Y” union pipe section on the same horizontal plane. (Inclination within 30
o
)
Make the straight section a minimum of 1.6ft (0.5m) after the vertical bend.
2. Vertical Installation
Straight section of the pipe connection on the outdoor unit side is made as follows:
a) The collective pipe connection part is installed upward, the straight section must be a minimum of 1.6ft (0.5m).
b) The collective pipe connection part is installed downward, the straight section must be a minimum of 1.6ft (0.5m).
3. Piping Form from Multi-Kit to Indoor Unit
Upward
Downward
Horizontally
Total Straight Section
Min. 1.6ft (0.5m)
Inclination
within 30
o
30
o
A
Inclination
(View from A)
INCORRECT
Total Straight Section
Min. 1.6ft (0.5m)
Total Straight Section
Min. 1.6ft (0.5m)
Upward
Downward
Outdoor Unit
Outdoor Unit
Multi-Kit
Example: Recommended From each Indoor Unit to Multi-Kit have bending pipes and they will not tend to be deformed.
Bending Pipe
Connection Pipe
Example: Recommended
Indoor Unit
Straight piping does not allow for movement of the piping when it expands
or contracts.
Copper Piping will expand and contract due
to temperature changes in piping.
Copper Piping will expand and contract due to
temperature changes in piping.
NOTE:
[ Fixing for Liquid Piping, Low Pressure Gas Piping and High/Low Pressure Gas Piping ]
Multi-Kit
Install Horizontally
Due to the properties of copper piping
material, expansion and contraction take place
during seasons of heat and cold. Do not strap gas
refrigerant and piping containing liquids together
as deformation and cracks can result.
NOTE:
When on site piping is installed using
soft or hard copper make sure that the
piping is installed to allow for movement
of the piping. Caused by contraction
and expansion of the piping due to
temperature changes.
High/Low Pressure
Gas Piping
Installing Part for Piping
Liquid Piping
60
INSTALLATION