Refrigerant Piping - Haier 1UH071N1ERG Installation Manual

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:
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
50m.
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
1UH071N1ERG 1UH090N1ERG
1UH105N1ERG 1UH125P1ERG
1UH125P1ERK 1UH140P1ERG
1UH140P1ERK 1UH160P1ERG
1UH200W1ERK
1UH250W1ERK
90+0.5
7.3. Limitations for one way piping length and vertical
height difference for single split
1UH071N1ERG
M o d e l
1UH090N1ERG
1UH105N1ERG
One way piping
less than 50 m
length
Vertical height
difference
less than 30 m
(between indoor and
outdoor)
13
ball valve
Outdoor
unit
3-way stop valve
connecting
Pipe Diameter
method
of pipe
Liquid pipe 9.52mm
flaring
connection
Gas pipe
15.88mm
Liquid pipe
12.7mm
flaring
connection
Gas pipe
19.05mm
Liquid pipe 12.7mm
welding
Gas pipe
22.2mm
Install the removed flare nuts
to the pipes to be connected,
then flare the pipes.
1UH125P1ERG
1UH140P1ERG
1UH200W1ERK
1UH160P1ERG
1UH250W1ERK
1UH125P1ERK
1UH140P1ERK
less than 75 m
less than 75 m
less than 30 m less than 30 m