Connection of pipe | Haier AE122BCAAA (H2EM-18H03) guide

Installation procedure Connection of pipe

1. Connection of pipe

Connection method

The connecting pipe max length of KRD-32N is 15m, and the max fall between indoor and outdoor unit is 5m; the connnecting pipe max length of KDR-70N is 50m, the max fall between indoor and outdoor unit is 30m.

The max fall between two indoor units in one system is 10m.	Joint	Nut
In order to guarantee the efficiency, the pipe should be	Spanner
as short as possible.	Spanner
Daub the refrigerant oil on the joint and the flared nut.
When bending the pipes, give the roundness as large
as possible, to avoid crashing the pipes.		Spanner
To connect the pipe, fit the center and use hand to screw		Spanner
the nut, then use spanner to tighten the nut, as shown in figure.
Pay attention not to let alien matters, such as	If do not fit the center and screw the
sand, vapor get into the pipe.	If do not fit the center and screw the
sand, vapor get into the pipe.	nut hard, the screw thread may be
The connection of indoor unit pipe must be	nut hard, the screw thread may be
The connection of indoor unit pipe must be	damaged, which will cause
performed by using two spanners.	damaged, which will cause
performed by using two spanners.	refrigerant leakage.
	refrigerant leakage.

2.The additional charging amount of refrigerant

The additional charging of refrigerant (R22) should be complied with the installation manual of outdoor unit. It must use measurer to quantificationally charge. The a dditional charging amount must be complied with the specified amount.Requirements: Both excessive charging and less charging of refrigerant will cause the compressor trouble. It must be complied with the specified amount.

3. For discharging, please refer to outdoor unit

4.Leakage detection

Use leakage detector or soap water to check if the connected part of the connection pipe and the valve cap leak.

5.Thermal insulation treatment

The thermal insulation of connection pipe should be performed at both gas side and liquid side. In COOLING, both liquid side and gas side are in low temperature, in order to prevent dew from forming, thermal insulation should be done.

The thermal insulation material at the gas side must use the material with the heat resistant temperature over 120C.

The connected part of indoor unit connection pipe should be thermal insulated.

The cut upward (Attached Figure)

On-site connection pipe side

Indoor unit

Accessorial thermal insulation pipe

AE122BCAAA (H2EM-18H03) specifications

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