CLIVET WDAT-iZ4, Manual For Installation, Use And Maintenance

Page: 12 / 72

12
4 WATER CONNECTIONS
The unit must always be protected
from freeze.
Otherwise irreversible damage may
occur.
Minimum water flow
Maximum water flow
Risk of freeze
If the unit or the relative water connections can be subject to
temperatures close to 0°C:
x
Mix water with ethylene glycol, or
x Safeguard the pipes with heating cables placed under the
insulation, or
x
Empty the system in cases of long non-use
Anti-freeze solutions
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).
Water flow-rate
The design water flow-rate must be:
x
inside the exchanger operating limits (see the TECHNICAL
INFORMATION chapter)
x
guaranteed also with variable system conditions (for example,
in systems where some circuits are bypassed in particular
situations)
If the system capacity is below the minimum flow, bypass the
system as indicated in the diagram.
If the system capacity exceeds the miaximum flow, bypass the
system as indicated in the diagram
Minimum system water content
Minimum system water contents are given in the ‘General
technical data’ section and they have to be satisfied to stop the
compressor from continuously switching on and off.
Water filter
Use filter with mesh pitch:
1,6 mm
Ÿ Must be installed immediately in the water input of the unit,
in a position that is easily accessible for cleaning.
Ÿ The filter never should be removed, this operation invalidates
the guaranty.