Water Treatment - Daikin EWAQ GZ Serie Manual Del Usuario

10. If case of unit substitution, the entire water system
must be emptied and cleaned before the new unit is
installed. Regular
treatment of water are recommended before starting
up the new unit.
11. In the event that glycol is added to the water system
as anti-freeze protection, pay attention to the fact
that suction pressure will be lower, the unit's
Figure 6 - Water piping connection for heat recovery exchangers

Water treatment

Before putting the unit into operation, clean the water circuit.
Dirt, scales, corrosion debrits and other material can
accumulate inside the heat exchanger and reduce its heat
exchanging capacity. Pressure drop can increase as well, thus
reducing water flow. Proper water treatment therefore reduces
pH (25°C)
Electrical conductivity S/cm (25°C)
-
Chloride ion (mg Cl / l)
Sulphate ion (mg SO
Alkalinity (mg CaCO
3
tests and proper chemical
Figure 5 - Water piping connection for evaporator
1. Pressure Gauge
2. Flexible connector
3. Flow switch
4. Temperature probe
1. Pressure Gauge
2. Flexible connector
3. Temperature probe
Table 1 - Acceptable water quality limits
6,88,0
800
200
2 - 200
/ l)
4
100
/ l)
performance will be lower and water pressure drops
will be greater. All unit-protection systems, such as
anti-freeze, and low-pressure protection will need to
be readjusted.
12. Before insulating water piping, check that there are
no leaks.
5. Isolation Valve
6. Pump
7. Filter
4. Isolation Valve
5. Pump
6. Filter
the risk of corrosion, erosion, scaling, etc. The most
appropriate water treatment must be determined locally,
according to the type of system and water characteristics.
The manufacturer is not responsible for damage to or
malfunctioning of equipment caused by failure to treat water or
by improperly treated water.
Total Hardness (mg CaCO
Iron (mg Fe / l)
2 -
Sulphide ion (mg S / l)
Ammonium ion (mg NH
Silica (mg SiO / l)
2
D-EIMAC01109-14EU - 15/208
 200
/ l)
3
 1.0
None
+  1.0
/ l)
4
 50