Daikin REYQ96MTJU, Инструкция по проектированию, установке и испытаниям, Страница: 37 / 236

Si39-406 Installation
General Information 31
3.2.4 Thermal Insulation Work (Refrigerant Piping)
„
Operational steps
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
of Thermal
Insulation 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.
Attention should be paid to the unit model and its operating conditions since there are occasions
when the gas and liquid pipes also need to be thermally insulated.
„
Important points
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 and humid. (Refer to Installation manual "6-5 Pipe insulation" for more detail)
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 or less then thermal insulation will also be required for the liquid pipes.
Refrigerant pipe
work Insulation
(jointed areas)
Insulation (with
the exception of
the jointed
areas)
Air tight test
(V0985)
Pipe size in. (mm) Thickness of insulation material
φ
1/4~
φ
1 (6.4mm~25.4mm)
φ
1/2 or more (12.5mm or more)