Idiomas disponibles
Idiomas disponibles
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
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 connections 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.
on page 13, must be
15
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
Gas pipe
Indoor
Unit
Liquid pipe
7.2. Piping size for single split
Model
Pipe
1U105S2SS1FA/B
Liquid
1U105S2SS2FA
pipe
1U125S2SN1FA/B
1U125S2SN2FA/B
Gas
1U140S2SN1FA/B
1U140S2SP1FA/B
pipe
1U140S2SP2FA/B
Liquid
pipe
1U160S2SP1FB
Gas
pipe
7.3. Limitations for one way piping length and
vertical height difference for single split
1U105S2SS1FA/B
1U105S2SS2FA
1U125S2SN1FA/B
Model
1U125S2SN2FA/B
1U140S2SN1FA/B
One way piping
less than 50 m
length
Vertical height
difference
less than 30 m
(between indoor
and outdoor)
Ball valve
Outdoor
unit
3-way stop valve
Diameter of
connecting
pipe
method
Φ 9.52mm
flaring
connection
Φ 15.88mm
Φ 9.52mm
flaring
connection
Φ 19.05mm
Install the removed flare
nuts to the pipes to be
connected, then flare the
pipes.
1U140S2SP1FA/B
1U140S2SP2FA/B
1U160S2SP1FB
less than 75 m
less than 30 m
