CLIVET MSE-XSC3 100.4, Installation And Operating Manual

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4 Water connections
4.1 Water quality
Water features
•
confi r ming to local regulations
•
total hardness < 14°fr
•
within the limits indicated by table
The water quality must be checked by qualified personne l .
Water with inadequate characteristics can cause:
•
pressure drop increase
•
reduces energy efficie nc y
•
increased corrosion potential
Acceptable water quality values:
SO
4
2-
HCO
3
-
/SO
4
2-
Total Hardness
Cl
-
PO
4
3-
< 100
> 1
4,5 ÷8,5
< 50
< 2,0
NH3 < 0,5
PH 7,5 ÷9,0
ppm
dH
ppm
ppm
ppm
Fe
3
+
Mn
++
CO
2
H
2
S
Temperature
< 0,5
< 0,05
< 50
< 50
< 65
Oxygen content < 0,1
Free Chlorine < 0,5
ppm
ppm
ppb
°C
ppm
ppm
ppm
Provide a water treatment system if values fall outside the limits.
The warranty does not cover damages caused by limestone formations, deposits and impurities from the water supply and / or failure from
failed system clearing to clean system.
4.2 Risk of freezing
If the unit or the relative water connections are subject to temperatures close to 0°C:
•
mix water with glycol, or
•
safeguard the pipes with heating cables placed under the insulation, or
•
empty the system in cases of long non-use
4.3 Anti-freeze solution
The use of an anti-freeze solution results in an increase in pressure drop.
Make sure that the glycol type utilized is inhibited (not corrosive) and compatible with the water circuit components.
D o not use diff erent glicol mixture (i.e. ethylene with propylene).
4.4 Water flow-rate
The project water-fl o w must be:
•
within exchanger operating range
•
guarantee, also with variable system conditions (for example in systems where some circuits are bypassed in particular situations).
4.5 Minimum system water content
Minimum system water volumes have to be satisfied o avoid continuous compressor swit ching on and off .
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