SMC Networks HRS Series - Page 48

DOC1001322
Chapter 3 Transport and Setting Up
3.5 Circulating Fluid Supply HRS Series
3-32
 Ethylene glycol aqueous solution
When ethylene glycol aqueous solution is used, prepare the ethylene glycol
aqueous solution separately.
Refer to "3.2.2 Operation at low ambient temperature or low circulating fluid
temperature" for the concentration of the ethylene glycol aqueous solution.
To control the concentration of the ethylene glycol aqueous solution, a
densitometer is available (sold separately) from SMC.
Item
No
Remarks
Ethylene glycol aqueous solution 60%
HRZ-BR001
Dilute to with clean water (tap water).
Densitometer
HRZ-BR002
－
 Piping of the overflow
Description
Port size
Specification
Automatic fluid fill port
Rc1/2
Supply pressure: 0.2 to 0.5 MPa
Overflow port
Rc1
The piping should be ø25 mm or more and the length of 5
meters or less.
Avoid riser piping (trapping part).
Fig. 3-18 Piping to the automatic fluid fill port and overflow port
 When using ethylene glycol aqueous solution, collect the
overflowed fluid in the recycling pit and dispose it according to the
local law of the country and area that the product is installed.
 When using ethylene glycol aqueous solution, check the
concentration periodically because the density will be reduced due
to the automatic fluid fill function.
No riser piping
Obstacle
To drainage pit
To drainage pit
Piping to automatic
fluid fill port
Piping to automatic
fluid fill port
Piping to
overflow port
Riser piping
Piping to
overflow port