AKO 226.0220 Series Instructions de montage et d'entretien - Page 9
Parcourez en ligne ou téléchargez le pdf Instructions de montage et d'entretien pour {nom_de_la_catégorie} AKO 226.0220 Series. AKO 226.0220 Series 10 pages. Temperature regulator selfactuated, three-way temperature regulator with interior thermostat, balanced, with flange connections
Imprimer la page
Mounting and Servicing Instructions
AKO Temperature Regulator selfactuated
10. Service and Maintenance
AKO temperature valves are virtually maintenance free. However, if the medium
contains pollutants or deposits occur in the control valve, it may be necessary to clean the
control valve at large intervals.
Please check from time to time in order to recognize any possible malfunction.
11. Fault detective and corrective
In case of mal function it has to be checked, if installation and setting have been
executed according to this operations manual.
Reasons for control temperature exceeds being too high
-thermostats soiled, limed up or sticking
(clean valve and replace sealing kit)
-radiator capacity too low
(clean radiator and check cooling capacity)
-temperature range of thermostats too high
(fit thermostats with appropriate set point)
-heat source supplies too much heat, control valve underdimensioned
(recalculate dimensioning of control valve)
-pressure loss of cooler too high
(reduce pressure difference between port B and C)
Reasons for control temperature being too low
-the temperature range of the thermostats is too low
(fit thermostats with appropriate set point)
-heat source supplies to few heat, control valve overdimensioned
(recalculate dimensioning of control valve)
-control valve installed incorrectly. Ports B and C inverted. At low temperatures the
complete flow of coolant runs through the cooler.
(correct installation of the valve)
-thermostats have been overheated, sliders of the thermostats do not close properly
(replace thermostat)
12. Exchanging a thermostat
When repairing the following points must be overserved:
-
pressureless pipe system
-
medium must be cool
-
plant must be drained
-
purge piping systems in case of caustic, inflammable, aggressive or toxic media
12.1 Removing of the thermostat
- lock all pipes leading to the control valve, release remaining pressure
- open valve cover bolts M8 (pos.5) and remove valve cover (pos.2)
- extract thermostat (pos.4)
- check inside of valve body for soils and clean if necessary.
- check condition and proper seating of the thermostat slider.
- check and replace flat seal (pos.7) in the guiding ring (pos.3) and the o-ring (pos.6)
Friedrich-Sertürner-Straße 14 • D-51377 Leverkusen • Tel.: +49 (0) 214 / 840599-0 • Fax: +49 (0) 214 / 840599-29
AKO Regelungstechnik GmbH & Co KG
eMail: [email protected] • Web: http://www.ako-regelungstechnik.de
9