Technical staff manual
45
17.5 3 way valve dismantling
In order to dismantle the 3 way valve, it is necessary to:
1)
Dismantle the secondary heat exchanger (see
p. 5), page 44);
2)
Take out the clip 1 (see Scheme 27) of the electric motor’s fastening to the 3 way valve’s body frame
and take off the electric motor 2;
3)
Unscrew two screws 3of the fastening flange of the electric motor 4 to the 3 way valve’s body frame
and take off the fastening flange of the electric motor 4;
4)
Remove the sealing plug 5 of the 3 way valve’s body frame, pulling it hard aside;
5)
Take the 3 way valve’s details out of the body frame;
6)
Wash and lubricate all details;
7)
Replace the details that are out of order.
Assembly is performed in the reverse order..
17.6Bypass valve dismantling
In order to dismount the bypass valve it is
necessary to:
:
1)
Switch the boiler off (see p. 10.4, page 24);
2)
Close the stop valves at the boiler’s inlet and
output, drain the heat carrier out of the boiler (see p.
10.5, page 24)
(if there are no stop valves, drain the heat carrier
from the whole heating system);
3)
Remove the boiler’s coating (see p. 17.1,
page 41);
4)
Unscrew the nut 2 (see Scheme 28), turn the
pipe 1 and take out the bypass valve from the body
frame of the 3 way valve3;
5)
Replace the bypass valve if it is out of order.
Assembly is performed in the reverse order.
Scheme 27. 3 way valve dismantling
Scheme 28. Bypass valve dismantling