Change Of Flow Switch Stuffing Box; Change Of Thermostatic Element; Reassembling - Vaillant VCW 2O Instructions For Installation And Servicing

8.14.2.1 Change of flow switch stuffing box
Remove complete flow switch as in 8.14.2.
Unscrew retaining screw (S9) and take off the
micro switch assembly. Unscrew adiustment
nut (S10), remove lever assembly, remove 3
screws securing top cover, unscrew stuffing
box, remove both rubber seals and fit new
seals, ensuring washer is fitted between the
seals. Reassemble in reverse order and adiust
lever assembly of the cold flow switch as
follows: Turn down the adjustment nut (S10)
slowly until micro switch closes the red to brown
circuit and make one more complete turn down.
8.14.2.2 Change of thermostatic element
Unscrew the 3 retaining screws (S11) and
remove the housing (S12). Reassemble in
reverse order, using new washers.
8.14.2.3 Changing internal seals
Remove housing as in 8.1 4.2.2.
Bemove seals R1 and R2 and replace with new
ones. Do not use any jointing compound or
grease.
8.14.3 Reassembling
Reassemble in reverse order, using new
wasners.
Check - earth continuity
- PolaritY
-
resistance to earth
according to INSTRUCTIONS FOR BRITISH
GAS MULTIMETER.
Note: position of notches on plug as shown.
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