31
ENGLISH
Charging water
After installation is completed, the following procedures shall be used to charge water into the Outdoor Unit.
f
Connect water lines to water connections of Air-Water Heat Pump.
f
Air vent valve shall be open at least 2turns so that air can be eliminated
in the system.
f
Open the shut-off & drain valve in the water supply connection.
f
Water pressure of supply line shall be over 2.0 bar for good charging
work.
f
Stop water supply when the pressure indicates around 2.0 bar.
t
There shall be enough space for Service works.
t
Water pipe and connections shall be cleaned by using water or cleaner before operating the unit at first time.
t
Considering E.S.P and water pump performance, select water plumbing specification and under floor loofs.
t
Make sure to calculate the total resistance of piping system and determine the size of pipes before selecting the
required head of pumps. If the pressure loss of total water system is over than designed pressure, an external
water pump shall be installed on piping system in series.
t
Do not connect power supply while water is charging.
t
When initial installation or re-installation is required, remove air by air vent valve in water plumbings which are
installed by local installers to prevent air trap in the system while charging water.
t
Make sure that back flow preventer (check valves) shall be installed on main supply line to prevent from
contaminating the city water.
- It is recommended to install the make-up water assembly to prevent from contaminating the city water.
- Check valves in the make-up water assembly can prevent running water inside Outdoor Unit from
contaminating water supplies during installation or maintenance works.
CAUTION
Pressure relief valve
MONO Unit does not have a pressure relief valve. The valve shall prevents abnomal water pressure from damaging the the
system by opening at 3.0 bar.
t
Make certain that the discharged water out of drain pan does not affect other elements.
CAUTION
Filter / Strainer
Installation of Filter / Strainer is mandatory for water system. The Filter or Strainer shall be located in front of inlet pipe of PHE.
While operating the system, some dust and foreign materials can circulate the system and can make the whole system not
work well due to blockage of heat exchangers and corrosion in some components.
Filter mesh : #50
Piping insulation
The complete water circuit, inclusive all 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
time. The thickness of the sealing materials must be at least 9 mm with (0.035 W/mK) in order to prevent freezing on the
outside water piping.
If the 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 sealing.
Water Oulet
Water Inlet
AE080**
AE120/160**
