Notes On Replacing The Parts - Mitsubishi Electric EHST20C-VM6HB Service Manual

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
Loctite Henkel
Loctite remover Henkel
Note: When using the products above, refer to the appropriate manuals that come with the individual products.
Table 11-2
Part name *1
PRESSURE RELIEF VALVE 3bar
TEMPERATURE AND PRESSURE RELIEF VALVE
*1. For more details about the listed parts refer to the parts catalogue included in this manual.
*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-.
Always use a new O-ring or gasket.
Table 11-3
Size
[inch]
G1/4"
G3/8"
G3/4"
Gasket
G1"
G1 1/2"
G1 3/4"
Strainer cover
O-ring Flow switch
Air vent (Automatic)
Drain cock (primary circuit)
Attached packing
Air vent (manual)
Flare joint (for water circuit parts)
After the procedure is complete, ensure that no water leaks.
OCH531
No.
Loctite 577
Loctite 700 Gasket Remover
Recommended tightening
torque [Nm] *2
15 ± 1
15 ± 1
Recommended tightening torque
[Nm]
8 ± 1
15 ± 1
6 ± 
4 ± 
4 ± 
10 ± 1
45 ± 4.5
8 ± 1
15 ± 1
15 ± 1
15 ± 1
5 ± 
Note
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
Spray loctite remover over sealant on the threads, let the sealant
sit until soft, and then eliminate it with a wire brush.
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