Daikin EWWD170~600G-SS, Инструкция по установке, эксплуатации и обслуживанию

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D-EIMWC00208-16EN - 11/48
Fig. 3 - Water piping connections for evaporator
Fig. 4 - Water piping connection for heat recovery exchangers
Install a mechanical filter on the inlet to each heat exchanger. Failure to install a mechanical filter allows solid
particles and/or welding slag to enter the exchanger. Installation of a filter with a mesh size not exceeding 0.5 mm in
diameter is advised.
The manufacturer cannot be held responsible for any damage to exchangers ensuing from the lack of a mechanical
filter.
Water treatment
Before putting the machine into operation, clean the water circuit. Dirt, scaling, corrosion residue a nd other foreign
material can accumulate inside the heat exchanger and reduce its heat exchanging capacity. Pressure drops can
increase as well, thus reducing water flow. Proper water treatment therefore reduces the risk of corrosion, erosion,
scaling, etc. The most appropriate water treatment must be determined locally, according to the type of system and local
characteristics of the process water.
The manufacturer is not responsible for damage to or malfunctioning of equipment caused by failure to treat w ater or by
improperly treated water.
Table 1 - Acceptable water quality limits
PH (25°C)
6.8

8.0
Total hardness (mg CaCO
3
/ l)

200
Electricity conductivity

S/cm (25°C)

800 Iron (mg Fe / l)

1.0
Chloride ion (mg Cl / l)

200 Sulphide ion (mg S
2
/ l) Nessuno
Sulphate ion (mg SO
2
4
/ l)

200
Ammonium ion (mg NH
4
+
/ l)

1.0
Alkalinity (mg CaCO
3
/ l)

100
Silica (mg SiO
2
/ l)

50