The water shortage in cooling operation could cause irreparable damage to the unit.
A water flow switch must be installed outside the unit for air conditioning operation to avoid any damage to the unit. The control
The DHW water tank must be with coil heat exchanger inside, so the tank water is clean and seperated with heat pump
After all connection is finished, connect the power supply, NOT SWITCHING ON THE UNIT.
-Open the tap water and let the tap water go into the heat pump hydraulic recycle.
-Open air discharge valve of inner water tank on the top and open air discharge valves of all fan coils. The water pump
-Close air discharge valve when water comes out continuously.
- Open a point of hot water consumption to flush the system.
* A water regulation valve(Normally 1.5-2.5 bar) must be installed before tap water go into the heat pump inlet.
* Check the correct rotation of water pump axis after uncover the maintenance screw with a scew driver.
.Before assure the water pump is working well and water flow is correct, Put the unit in HEATING mode.
- Check the water pressure gauge installed in the control panel of indoor unit, it must be between 1 and 2.5 bar
(normal 1.5 bar) for properoperation.
- Ensure that all secondary facility is found with water pressure and completely purged of air. The existence of air
in the air conditioning circuit can cause irreparable damage unit.For this reason, air discharge valve should be
installed in the highest part of the hydraulic circuit to remove all air from the system.
Water Flow Switch
Important:
Filling and pressure testing for Hydraulic Circuit
8. INSTALLATION
hydraulic recycle.
maintenance screw
choose air conditioning heating mode to fill the air conditioning side.
-Switch the inner 3 way valve to fill water for both side :
heating temp to 10 centigrade.
maintenance screw can also be loosed to purge air.
should be connect to IN5 of indoor unit control board.
In order to avoid compressor running, firstly set both Domestic hot water target temp and air conditioning
-Set target water temp back after complete installation and check everything ok
Turn on the unit and choose DHW mode, after DHW side air is purged completedly and filled with water,
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