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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 bracket 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;
Take the 3 way valve's details out of the body frame;
5)
6)
Wash and lubricate all details;
7)
Replace the details that are out of order.
Scheme 27. 3 way valve dismantling
Assembly is performed in the reverse order..
17.6 Bypass 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);
Remove the boiler's coating (see p. 17.1, page
3)
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 valve 3;
5)
Replace the bypass valve if it is out of order.
Assembly is performed in the reverse order.
Scheme 28. Bypass valve dismantling
45
Technical staff manual
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