Haier 1U28HS1ERA Installation Manual page 15

Installation Procedure
1. Piping diagram
1U28HS1ERA 1U36HS1ERA 1U48LS1ERA 1U48LS1ERB 1U48LS1EAB
1U48IS1EAB 1U60IS1ERA 1U60IS1ERB 1U60IS1EAB AU60NAIESA
Flare connection
Gas pipe
Indoor
unit
Liquid
pipe
2. Piping size
1U28HS1ERA 1U36HS1ERA
1U48LS1ERA 1U48LS1ERB
1U48LS1EAB 1U48IS1EAB
1U60IS1ERA 1U60IS1ERB
1U60IS1EAB AU60NAIESA
3. Limitations for one way piping length and vertical height difference
M o d e l
1U28HS1ERA 1U36HS1ERA
1U48LS1ERA 1U48LS1ERB 1U48LS1EAB
1U48IS1EAB 1U60IS1ERA 1U60IS1ERB
1U60IS1EAB AU60NAIESA
Precautions for refrigerant piping
Do not twist or crush piping.
Be sure that no dust is mixed in piping.
Bend piping with as wide angle as possible.
Keep insulating both gas and liquid piping.
Check flare-connected area for gas leakage.
4. Piping connection method
Apply refrigerant oil to the joint and the flange.
To bend a pipe, give the roundness as possible not to crush
the pipe.
When connecting pipe, hold the pipe centre to centre and then
screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands enter
the pipe.
Forced fastening without centering may damage the threads and cause a gas leakage.
3-way stop valve
Outdoor
unit
3-way stop valve
9.52x0.8mm
Liquid pipe
15.88x1.0mm
Gas pipe
9.52x0.8mm
Liquid pipe
19.05x1.0mm
Gas pipe
One way piping length
less than 30 m
less than 50 m
13
90+0.5
Install the removed flare nuts to the pipes
to be connected, then flare the pipes.
Vertical height difference
(between indoor and outdoor)
less than 20 m
less than 30 m
Spanner
Spanner
Pipe diameter Fastening torque (N.m)
Liquid pipe 6.35mm
Liquid pipe 9.52mm
Gas pipe 12.7mm
Gas pipe 15.88mm
Gas pipe 19.05mm
Piping Connection
Joint
Nut
14.2-17.2
32.7-39.9
49.5-60.3
61.8-75.4
97.2-118.6