GRE HPM20, Owner'S Manual

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Attention:
Ensure the power plug is secure Never pull out the power plug during Never use damaged electric wires
If the plug is not secure, it may cause
operation or unspecified electric wires.
an electric shock, over-heating or Otherwise, it may cause an electric Otherwise it may cause an electric
fire shock or a fire due to over-heating. shock or a fire.
After all connections have been made and checked, carry out the following procedure:
1. Switch on the filter pump. Check for leaks and verify that water is flowing from and to the swimming pool.
2. Connect power to the heat pump and press the On/Off button on the electronic control panel.
The unit will start up after the time delay expires (see below).
3. After a few minutes, check whether the air blowing out of the unit iscooler.
4. When the filter pump is turned off, the unit should also turn off automatically.
5. Allow the heat pump and the filter pump to run 24 hours a day until the desired water temperature is
reached. The heat pump will stop running at this point. After this, it will restart automatically (as long as
the filter pump is running) whenever the swimming pool water temperature drops 2 degree below the set
temperature (for example, if you sent the temperature 28 ºC, the heat pump will stop when the
temperature at 28ºC. While it will restart when the temperature of the water down to 26ºC).
Depending on the initial temperature of the water in the swimming pool and the air temperature, it may
take several days to heat the water to the desired temperature. A good swimming pool cover can
dramatically reduce the required length of time.
Time delay - The heat pump has a built-in 3-minute start-up delay to protect the circuitry and avoid
excessive electrical contactor wear. The unit will restart automatically after this time delay expires. Even a
brief power interruption will trigger this time delay and prevent the unit from restarting immediately.
Additional power interruptions during this delay period do not affect the 3-minute duration of the delay.
4.5 Condensation
The air drawn into the heat pump is cooled by the operation of the heat pump for heating the pool water,
which may cause condensation on the fins of the evaporator. The amount of condensation may be as much as
several litters per hour at high humidity. The condensate will drain from the bottom of the heat pump. This is
sometimes mistakenly regarded as a water leak. .