Check Operation Of Domestic Hot Water System - Vaillant VCW 2O Instructions For Installation And Servicing

9.6 Sheet 6: Check Operation of Domestic Hot Water System
(Heating switch in position 0 switch for domestic hot water in position Zll
Go to sheet 1
Go to sheel 2 Go to sheet 3
Can Pilot be lit?
lamp in Main
Switch give
1
light? -z
-
Heating
\
Switch to l. Does
. Main Burner
Set Heatinq
Switch lo "o-"
and draw hot water
Note 14: For this purpose, open the control box as described in Note .l and remove front panel.
Thus the micro swilch is accessible and the movement of the switch Din of the water section can be observed. Ooen
the warm water tap. With a water flow.quantity ol approx. 1 l/min. the switch pin must move and operate the micro
switch via the switch lever which can be adiusted. lf the switch pin of the wdter section does not hove, the water
section must be removed and checked (diaphragm).
lf the micro switch does not operate despite the fact that the switch pin moves, the switch lever must be readiusted.
For this, unscrewthe support ofthe micro switch and push itdownward until the switch lever contacts thetop oiwater
section. Fix the suOport in this Dosition.
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