Notes On Replacing The Parts - Mitsubishi Electric EHST20C-VM2C.UK 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 tighten-
ing 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
PRESSURE RELIEF VALVE 10bar
TEMPERATURE AND PRESSURE RELIEF VALVE
*1. For more details about the listed parts refer to the parts catalog.
*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]
G1/4"
G3/8"
Gasket G3/4"
G1"
G1 3/4"
Packing Strainer cover
Flow sensor
O-ring
Air vent (Automatic)
Drain cock (primary circuit)
Drain cock
Attached packing
(P-HEX sanitary circuit)
Air vent (manual)
Flare joint (for water circuit parts)
After the procedure is complete, ensure that no water leaks.
OCH570
No. Applied parts
Loctite 577 PRESSURE RELIEF VALVE (3bar
and 10bar)
Loctite 5776 TEMPERATURE AND PRESSURE
RELIEF VALVE
Loctite 7200 PRESSURE RELIEF VALVE (3bar
Gasket Remover and 10bar) and TEMPERATURE
AND PRESSURE RELIEF VALVE
Recommended tightening
torque [Nm] *2
15 ± 1
15 ± 1
15 ± 1
Recommended tightening torque
[Nm]
8 ± 1
15 ± 1
36 ± 2
42 ± 2
10 ± 1
40 ± 2
30 ± 2
15 ± 1
0.25 ± 0.05
0.25 ± 0.05
0.25 ± 0.05
35 ± 2
83
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 seal-
ant sit until soft, and then eliminate it with a wire brush.