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Português
NOTICE
For new installations, use the standard pipe sizes.
When using existiong pipes, size-up is allowed as
mentioned in the table above.
Additional restrictions towards allowable pipe lengths,
as mentioned in the table 7.3
on page 13, must be
taken into account.
Not using the standard lpipe size may result in
capacity decrease. The installer must acknowledge
this and judge this very carefully in function of the
complete installation.
Existing or pre-installed piping can be used
1. Piping must comply with the criteria below.
• Piping diameter must comply with the limitations as
indicated
in paragraph "7.2. Refrigerant pipe size ".
• Piping length must be withinlimits of the allowable
piping length as in paragraph "7.3. Allowable pipe
length and height difference".
• Piping must be designed for R410A. See paragraph
"6.2. Selection of piping material".
2. Piping can be reused without cleaning when:
• Total 1-way piping length: ≤ 50m.
• No compressor breakdown has occurred in the
history of the unit to be replaced.
• A correct pump down operation can be executed:
- Operate the unit continuously for 30minutes in
cooling mode.
- Execute a pump down operation.
- Remove the air conditioning units to be replaced.
• Check the contamination inside the existing piping.
If you cannot meet all these requirements, the existing
pipes must be cleaned or replaced after removing the
air conditioning units to be replaced.
3. Prepare the flare connect ons for higher pressure.
See paragraph 6.2
Cautions on handling the stem cap
The stem cap is sealed where indicated by the arrow.
Take care not to damage it.
After handling the stop valve, make sure tighten the
stem cap securely. For the tightening torque, refer to
the table below.
Check for refrigerant leaks after tightening the stem
cap.
Cautions on handling the service port
Always use a charge hose equipped with a valve
depressor pin, since the service port is a Schrader
type valve.
After handling the service port, make sure to tighten
the service port cap securely. For the tightening
torque, refer to the table below.
Check for refrigerant leaks after tightening the service
port cap.
7. Refrigerant piping
7.1. Piping diagram for single split
Flare connection
3-way stop valve
Ball valve
Liquid pipe
Outdoor
unit
Indoor
Unit
Gas pipe
7.2. Piping size for single split
Model
Pipe
Diameter of
pipe
connecting
method
JZ100-A1
Liquid
pipe
Φ 9.52mm
flaring
connection
Gas
pipe
Φ 15.88mm
7.3. Limitations for one way piping length and
vertical height difference for single split
Model
JZ100-A1
One way piping
length
less than 50 m
Vertical height
difference
(between indoor
and outdoor)
less than 30 m
Install the removed flare
nuts to the pipes to be
connected, then flare the
pipes.
