95
OCH714D
Notes on replacing the parts
Replacement of the parts listed below requires the following procedure.
After the parts are removed, eliminate loctite on threads by applying loctite remover, apply new loctite, and then install and tighten the parts to the specified tightening
torques below. For details about recommended loctite and loctite remover, refer to Table 11-1, and for details about the replacement parts and their tightening torques,
refer to Table 11-2.
Table 11-1
Recommended
Manufacturer
No.
Applied parts
Note
Loctite
Henkel
Loctite 5400
PRESSURE RELIEF VALVE (3 bar
and 10 bar)
Apply loctite all over from the end of external thread to the
second ridge. After installing the parts, fix the parts for at least
30 minutes
Loctite 5776
TEMPERATURE AND PRESSURE
RELIEF VALVE
Loctite remover
Henkel
Loctite 7200
Gasket Remover
PRESSURE RELIEF VALVE (3 bar
and 10 bar) and TEMPERATURE
AND PRESSURE RELIEF VALVE
Spray loctite remover over sealant on the threads, let the seal-
ant sit until soft, and then eliminate it with a wire brush.
Note: When using the products above, refer to the appropriate manuals that come with the individual products.
Table 11-2
Part name *1
Recommended tightening
torque [Nm] *2
PRESSURE RELIEF VALVE 3 bar
15 ± 1
PRESSURE RELIEF VALVE 5 bar
15 ± 1
PRESSURE RELIEF VALVE 10 bar
15 ± 1
TEMPERATURE AND PRESSURE RELIEF VALVE
15 ± 1
*1. For more details about the listed parts refer to the parts catalogue.
*2. Undertightening and overtightening the parts affect water seal life. Tighten the parts to the appropriate tightening torques.
When installing the parts that are not listed above, observe the tightening torques in accordance with Table 11-3.
Always use a new O-ring or gasket.
Table 11-3
Size
[inch]
Recommended tightening torque
[Nm]
Gasket
G1/4"
8 ± 1
G3/8"
15 ± 1
G3/4"
42 ± 2
G1"
42 ± 2
G1 3/4"
10 ± 1
Packing
Strainer cover
40 ± 2
O-ring
Flow sensor
30 ± 2
Air vent (Automatic)
3.5 ± 1
Attached packing
Drain cock (primary circuit)
0.25 ± 0.05
Drain cock
(P-HEX sanitary circuit)
0.25 ± 0.05
Air vent (manual)
0.25 ± 0.05
Flare joint (for water circuit parts)
35 ± 2
After the procedure is complete, ensure that no water leaks.