DC INVERTER MULTI VRF INSTALLATION
167
Drainage hose (mm)( Outer Dia)
Thickness of Thermal Insulation Materials
(mm)
Φ17 ≥15
Φ27 ≥20
≥34.9 ≥20
※ Notes:
E. The inclination of drainage hose shall be within 75mm, so that the drainage insert will ①
not bear excessive force.
F. To connect the drainage hose s for multiple machines, please use the method of
multi-pipe collection, as shown below.
Fig. The specification of collecting drainage hose shall be suitable to the working capacity of
the unit
We may collect the drainage hose s of all the indoor units in one system (An outdoor unit
and all the indoor units connected to this outdoor unit are called one system), or collect the
drainage hose s of all the indoor units in several systems.
Notes: The ceiling height must be considered, and a specific gradient shall be ensured along
the water flow direction.
2
）Cassette Type (Including 4-way and 1-way)
a. Installation of drainage hose
¾ The drainage hose shall be installed to ensure smooth flow of water.
¾ The diameter of drainage hose shall be equal to or higher than the diameter of connection
pipe (PVC pipe) (exclusive of the rise section).
¾ The drainage hose shall be short and has a down gradient of 1/100 at least, thus to avoid air
bag
¾ If the inclination of the drainage hose is insufficient, drainage rise pipe shall be mounted.
¾ The installing height of drainage rise pipe shall be less than 280mm.
¾ The drainage rise pipe shall be in right angle to the unit and the distance to the unit shall not
exceed 300mm.
Thermal insulation o
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