GRE HPG25, Owner'S Manual, Page: 34 / 278

31
9. Maintenance
Warning !
-Before any maintenance work on the appliance, you must cut the electricity supply as there is a risk of
electric shock which may cause material damage,serious injury or even death.
- It is recommended that the appliance undergo general servicing at least on a yearly basis to ensure its
proper operation, maintain performance levels and prevent any possible failures.These operations are
carried out at the user's expense, by a qualified technician.for maintenace to be carried out by a qualified
technician.
-for maintenance to be carried out by a qualified technicain, please read the safety instructions in the
previous pages provided in the chapter entitled "maintenance: warnings concerning appliances containing
R32 refrigerant" before performing any of the maintenance operations described below.
(1) You should check the water supply system regularly to avoid the air entering the system and occurrence
of low water flow, because it would reduce the performance and reliability of HP unit.
(2) Clean your pools and filtration system regularly to avoid the damage of the unit as a result of the dirty of
clogged filter.
(3) In another way, you should check the unit is water fully before the unit start to run again.
(4)After the unit is conditioned for the winter season, it’s recommended to cover the heat pump with special
winter cover.
(5)When the unit is running, there is all the time a little water discharge under the unit.
(6) R32 pressure and temperature mapping table
Condition Power OFF
Ambient Temperature -5- 5
℃
5-15
℃
15-25
℃
25-35
℃
Water temperature / / / /
Pressure gauge reading
0.68-0.93
MPa
0.93-1.25
MPa
1.25-1.64
MPa
1.64-2.1
MPa
Condition Running (Heating)
Ambient Temperature / / / / /
Water temperature 10-15
℃
15-20
℃
20-25
℃
25-30
℃
30-35
℃
Pressure gauge reading
1.3-1.8
MPa
1.5-1.9
MPa
1.6-2.3
MPa
1.9-2.8
MPa
2.1-3.5
MPa
(7) Please always empty the water in heat pump during winter time or when the ambient temperature drops
below 0
℃
, or else the Titanium exchanger will be damaged because of being frozen, in such case, your
warranty will be lost.