Würth IVT LATENTO XXL 500 Notice De Montage page 37

Loss of storage water
 Is the storage tank cover closed with the clamps?
 Check the seat of the store cover – tight?
 Is the drain valve on the lower front screw down mounting tight?
The storage tank has identical temperatures on top and bottom
 Are the submersible sensors fitted at the right height?
 Has a too strong circulating pump been installed?
 Is the running time of the circulating pump too long?
 Does hot water enter the cold water supply?
Pressure drop in the system
 Pressure drop in the first weeks through escaping dissolved
air is normal!
 Pressure fluctuations of up to 0.3 bar are normal during operation!
 Check system for leak tightness.
 Check safety valve for correct installation, leak tightness and function
 Was the bleeding valve shut again after filling?
 Has the expansion vessel been regulated correctly or is it broken?
Storage tank cools down over night without hot water consumption
 Does the solar circuit pump run at night? Check the
controller settings!
 Is the collector temperature higher than the outdoor temperature at
night? Check the gravity brakes in the flow and return tube of the
solar pump group!
 Are all connections insulated?
 Has the hot water outlet been directly laid upwards? (Micro circula-
tion!) Make the connection to the side or use siphon design!
 Does the solar circuit pump run at night? Change timer setting!
 Are the gravity brakes functional? Possibly clean them?
 Is the gravity circulation in the circulation line too strong? Employ a
stronger reflux valve or integrate an electric 2-way valve after the
circulating pump!
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