Daikin VRV II Series Design, Installation & Testing Instructions page 34

Installation
3.2.4 Thermal Insulation Work
!
Materials
The thermal insulation materials which are used must be well able to withstand the heat from the pipes.
Example:
Heat pump type: Heat resistant polyethylene foam (heat resistance of at least 120°C)
Cooling only: Polyethylene foam (heat resistance of 100°C or more)
Essential Points
The insulation of jointed areas such as the soldered, flared or flanged sections should only be carried out
after the successful completion of the air tight test.
of Thermal
Attention should be paid to the unit model and its operating conditions since there are occasions when the
Insulation
gas and liquid pipes also need to be thermally insulated.
!
1. The thickness of the thermal insulation material must be determined in the light of the pipe sizes.
2. It will be necessary to increase the values in the above table for top floors or where conditions are hot
3. Where a customer supplies his own specifications then these must be adhered to.
4. Where it is anticipated that the air conditioning unit will be operated at external air temperatures of 10°C
28
(Refrigerant Piping)
Operational steps
Refrigerant pipe
work
Important points
Pipe size Thickness of insulation material
6.4mm~25.4mm
28.6mm~38.1mm
and humid.
or less then thermal insulation will also be required for the liquid pipes.
Insulation (with
the exception of
Air tight test
the jointed
areas)
10mm or more
15mm or more
Si39-303
Insulation
(jointed areas)
(V0985)
General Information