Tightening Torque - Hitecsa 105 Manual De Instrucciones De Uso, Mantención E Instalación

EN
• If the appliance is installed in an area that is subject to temperatu-
res lower than 0°C and there is a risk of a power failure in the heat
pump, the water must be mixed with a suitable amount of inhibited
monoethylene glycol.
• Clean the system beforehand in the case of new installation or emptying
the circuit. After each cleaning phase or when the water is changed or
glycol is added, in order to guarantee proper product operation, check
that the appearance of the liquid is clear, without visible impurities and
that the hardness is below 20 °f.
Connection to the water circuit
Problems may arise if air, moisture or dust penetrates the water circuit.
Therefore, always consider the following when connecting the water
circuit:
• Only use clean pipes.
• Cover the pipe end when inserting it through a wall so as to prevent dust
and dirt from penetrating.
• Use a good thread sealant to seal the connections. The seal must be
able to withstand the pressures and temperatures of the system.

Tightening torque

From 15 to 30 N.m. (150 to 350) kgf cm.
• The unit must only be used in a closed water system. The application
in an open water circuit can cause excessive corrosion in the water
pipes.
Insulating the pipes
The entire water circuit, including all the pipes, must be insulated to
prevent condensation during the cooling phase and a reduced cooling and
heating capacity.
If the outdoor air temperature exceeds 30°C and the relative humidity
exceeds 80%, the thickness of the sealing materials must be at least 20
mm to prevent condensation on the sealing surface.
Make sure to insulate the pipes so as to prevent the water from freezing.
Section II :: Installation and maintenance
Loading water
Check the following before loading the water:
• The pre-load water pressure is 1.5 bar.
• Make sure to prepare a suitable drain for the pressure relief valve and
• You must provide air bleed holes in all the high points of the system. The
• Pay attention to the components installed in the hydraulic pipes as they
• Never use zinc-coated components in the water circuit. They may
Load the water and bleed the air in the hydraulic circuit
1) Connect the water supply to a drain and filling valve.
2) Loosen the cap of the bleed valve to release the air from the hydraulic
3) Load water in the hydraulic circuit until the pressure gauge indicates a
4) Actuate the circulator to release the air from the hydraulic circuit.
5) When all the air has been released, tighten the cap of the bleed
37
prevent the water from coming into contact with the electrical
components.
air bleed holes must be positioned in places where they are easily
accessible so as to carry out the commissioning phase. An automatic air
bleed is supplied inside the unit. Check that the air bleed valve is not too
tightened excessively so that the air in the water circuit can still be
relieved.
must withstand the water pressure.
corrode excessively.
circuit. The cap must not be removed.
Air bleed
valve
pressure of about 2.0 bar.
When you press PUMP SW on the PCB Display, the water pump is
activated to circulate the water.
Each digital segment on the right side of the PCD display lights up in
sequence while the pump is operated.
The pump is automatically stopped after 10 minutes of operation. If it
was not possible to bleed the air from the water circuit, press PUMP SW
again after the pump stops. If you want to stop the pump before it stops
automatically, press PUMP SW again.
valve again.
Cap
Loosen
Tighten
PCB DISPLAY
PUMP.SW