14
Maintenance
continued
Cleaning/replacing the Thermovit regulator and strainer
1. Pay attention to the Danger note on page 4!
2. Undo hexagon bolt
N
and take cover
D
off body
K
.
3. Fully unscrew Thermovit regulator
G
and clean it.
4. Remove and clean strainer
H
.
5. Clean body
K
, inner parts and all sealing surfaces.
6. Replace Thermovit regulator
G
if it shows visible signs of wear or damage.
7. Coat all threads and sealing surfaces with heat-resistant lubricant (e.g. OKS 217).
8. Insert a new body gasket
J
.
9. Insert strainer
H
.
10. Screw in Thermovit regulator
G
and tighten to the torque specified in the table.
11. Place cover
D
on body
K
, and tighten hexagon bolts
N
and hexagon nuts
M
cross-
wise to the torques specified in the table.
Tools
■
Screwdriver 5.5/100, DIN 5265, form A
■
Combination spanner size 36 mm AF, DIN 3113, form B
■
Torque wrench 20–160 Nm, DIN ISO 6789
Torques
Item
Designation
Torque [Nm]
G
Thermovit regulator
140
NM
Hexagon bolts/hexagon nuts
45
A
Union nuts
30
All torques are based on room temperature 20°C, threads without lubricant.
