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6.4 Connecting the drainage hose to the indoor unit
The water coming from the pressure relief valve and the condensate water is collected in the drainage path.
The drainage hose should be connected to the drainage pipe.
Connect the drainage pipe with a throat bander and insert the drainage pipe into the floor drain.
6.5 Connecting the solar circulation piping (if needed)
If the solar kit is designed in the system. The solar circulation water pipe should be connected to the inlet and
outlet connector of indoor unit.
6.6 Water piping insulation
The complete water circuit including all piping, water piping must be insulated to prevent condensation during
cooling operation and reduction of the heating and cooling capacity as well as prevention of freezing of the outside
water piping during winter. The insulation material should at least of B1 fire resistance rating and complies with all
applicable legislation. The thickness of the sealing materials must be at least 13 mm with thermal conductivity 0.039
W/mK in order to prevent freezing on the outside water piping.
If the outdoor ambient temperature is higher than 30°C and the humidity is higher than RH 80%, then the
thickness of the sealing materials should be at least 20 mm in order to avoid condensation on the surface of the seal.
6.7 Water circuit anti-freeze protection
All internal hydronic parts are insulated to reduce heat loss. Insulation must also be added to the field piping.
The software contains special functions which use the heat pump and backup heater (if available) to protect the
entire system from freezing. When the temperature of the water flow in the system drops to a certain value, the
unit will heat the water by using the heat pump or the electric heating tap or the backup heater. The anti-freeze
protection function will turn off only when the temperature increases to a certain value.
In event of a power failure, the above features would not protect the unit from freezing.
When the unit is not running for a long time,make sure the unit is powered on all the time,if you want to cut off
the power,the water in the system pipe needs to be drained clean to avoid the pump and pipeline system be
damaged by freezing. Also the power of the unit needs to be cut off after water in the system is drained clean.
Throat bander
Floor drain
Fig.6-5
Fig 6-6
CAUTION
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