Daikin RWEYQ144PTJU [51/95] Layout example

REFNET Pipe System EDUS301214-N

50 Installation of Outside Units

4. REFNET Pipe System

4.1 Layout Example

4.1.1 Heat Pump Series: Use of the particular branch fitting appropriate to each individual unit type not only

permits the pipes to be laid with ease but also increases the reliability of the system as a whole.

Units can be added by connecting them directly to the REFNET header or REFNET joint. Further branches cannot be included in the system

below the REFNET header branch. Notes:

1. When the capacity ratio of the indoor system to the outside unit is more than 100% and when all the indoor units are in operation at

the same time then the rated capacity of each unit will be somewhat reduced.

2. Special purpose REFNET pipe components must be used for all the pipe work. For further details concerning choosing components,

see REFNET and Piping Selection Rules.

3. The Daikin REFNET kits are supplied with insulation intended to fit over the main body of the REFNET joint after installation of the REFNET

kit is complete.

4. IMPORTANT: In applications where the REFNET kits are installed in an environment requiring fire-rated materials to be used, it is

necessary for the installer to obtain from a third-party supplier and to utilize, for insulation, fire-rated materials that meet all

applicable building codes and other requirements. TheFactory-provided insulation that is supplied with the REFNET kits should be

discarded in a manner meeting all applicable laws.

Type of

fitting

Sample systems

Line branch fitting

(Pipes containing REFNET joints only)

Header branch fitting

(Piping consists of REFNET headers only)

Mixed branch fittings

(Piping including both headers and joints)