CLIVET WSAN-XIN 21-141, Installation And Operating Manual, Page: 12 / 72

12 WSAN-XIN 21-141 M0R940E13-00
5 Water connections
5.1 Water quality
The water quality can be checked by qualified personnel.
Water with inadequate characteristics can cause:
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pressure drop increase
•
energy efficiency decrease
•
corrosive symptom increase
Acceptable water quality values:
Provide a water treatment system if values fall outside the limits.
5.2 Risk of freeze
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
5.3 Anti-freeze solution
Consider that the use of anti-freeze solution determines an increase in a pressure drop.
Make sure that the glycol type utilized is inhibited (not corrosive) and compatible with the hydraulic circuit components.
Do not use different glicol mixture (i.e. ethylic with propylene).
5.4 Water flow-rate
The project water-flow must be:
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inside the exchanger operating limits (see the TECHNICAL INFORMATION section)
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guarantee, also with variable system conditions (for example in systems where some circuits are bypassed in particular situations).
5.5 Operation sequence
1. Carefully wash the system with clean water: fill and drain the system several times.
2. Apply additives to prevent corrosion, fouling, formation of mud and algae.
3. Fill the plant
4. Execute leakage test.
5. Isolate the pipes to avoid heat dispersions and formation of condensate.
6. Leave various point of service free (wells, vent-holes etc).
Neglecting the washing will lead to several filter cleaning interventions and at worst cases can cause damages to the exchangers and the
other parts.