Daikin VRV III REMQ120PBTJ, Engineering Data

Page: 12 / 130

EDUS391004-N REFNET Pipe System
Installation of Outdoor Units 11
3.2 Field Refrigerant Piping
3.2.1 Heat Pump Series
1. The following materials should be used for all refrigerant piping.

Materials: Deoxidized phosphorous seamless copper pipe or equivalent
2. The tips for insulation

Both Gas, Liquid piping must be insulated.

Materials: Glass fiber or heat resistant polyethylene foam.
Thickness: 1/2 inch or more
3.2.2 Heat Recovery Series

Suction, Discharge Gas piping, liquid piping must be insulated.

Example of thermal insulation work.

Insulation of both liquid and gas pipe

3 piping section (between outdoor unit and Branch Selector
unit)

2 piping section (between Branch Selector unit and indoor
unit)