SMC Networks HRS Series - Piping

DOC1001322
Chapter 3 Transport and Setting Up
3.3 Installation HRS Series
3-28
3.4 Piping
 Piping port size
Table 3.4-1 Piping port size
Description
Port size
Recommended
tightening torque
Recommended piping
specifications
Circulating fluid outlet
port
Rc1
36 to 38Nm
1.0 MPa or more
Circulating fluid return
port
Rc1
36 to 38Nm
1.0 MPa or more
Automatic fluid fill port
Rc1/2
20 to 25Nm
1.0 MPa or more
(Automatic fluid fill pressure:
0.2 to 0.5 MPa）
Overflow port
Rc1
36 to 38Nm
ID 25 mm or more
Tank drain port
Rc3/4
28 to 30Nm
ID 19 mm or more
[Tips]
<For HRS400-AN-46->
A set of thread adapters that converts the connections from Rc to NPT is
enclosed as an accessory. For NPT thread, be sure to use this adapter.
<For HRS400-AF46->
A set of thread adapters that converts the connections from Rc to G is
enclosed as an accessory. For G thread, be sure to use this adapter.
 Connect piping firmly. Incorrect piping might cause leakage of
supplied or drained fluid to surrounding area and facility.
 Use caution not to allow dust and foreign matter to enter the water
circuit, etc. during connection of piping.
 Securely connect the piping at the piping port with specific wrench
when tightening.
 Incorrect piping can burst when in service.
 Use non-corrosive material for fluid contact parts for the circulating
fluid and/or facility water. The use of corrosive materials such as
aluminum or iron for fluid contact parts, such as piping, may not
only lead to clogging or leakage in the circulating fluid and facility
water circuits but also refrigerant leakage and other unexpected
problems.
 Do not generate a rapid change of pressure by water hammer.
Internal parts of the product and/or the piping may be damaged.

It is recommended to use heat insulation to reduce the heat radiation
and absorption to/from customer's piping.
 Be sure to wear protective shoes and gloves to prevent injury from
the panel edges.