Connecting The Refrigerant Circuit; Precautions When Handling Piping; Figure 3-Connecting The Refrigerant Circuit (1); Figure 4-Connecting The Refrigerant Circuit (2) - Daikin EWLQ025KCW1N Installation, Operation And Maintenance Manual

9

CONNECTING THE REFRIGERANT CIRCUIT

The units are equipped with a refrigerant outlet (discharge side) and a refrigerant inlet (liquid side) for
the connection to a remote condenser. This circuit must be provided by a licensed technician and must
comply with all relevant European and national regulations.
9.1

Precautions when handling piping

If air, moisture or dust gets in the refrigerant circuit, problems may occur. Therefore, always consider the following when
connecting the refrigerant piping:
Use clean and dry pipes only.
1.
Hold the pipe end downwards when removing burrs.
2.
Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
3.
When a condenser less unit is installed below the condensing unit, the following can occur:
To solve these phenomena, provide oil traps in the discharge pipe every 10m if the level difference is
more than 10m.
9.2 Connecting the refrigerant circuit
•
Use a pipe cutter and flare suitable for R410A.
Make sure to use installation tools (gauge manifold charge hose, etc.) that are exclusively used for R410A installations to
withstand the pressure and to prevent foreign materials (e.g., mineral oils such as SUNISO and moisture) from mixing into
the system.

Figure 3-Connecting the refrigerant circuit (1)

D-EIMHP01601-22_01EN 10/26
- when the unit stops, oil will return to the discharge side of the compressor. When
starting the unit, this can cause liquid (oil) hammer.
- The oil circulation will decrease

Figure 4-Connecting the refrigerant circuit (2)

1 remote condenser
2 indoor water chiller
3 discharge
4 oil trap
5 liquid
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