HRX-OM-I051
Chapter 3 Transporting and Installation
3.3 Procedure for Installation
HRZ Series
3-14
3.3.6
Installation of circulating fluid and facility water piping
Pipe diameter
Table 3-3 Pipe Diameter
Pipe
Diameter
Recommended torque
(Material: SS* vs SS)
Facility water inlet
Rc1/2
28 to 30N
•
m
(20.7 to 22.1ft-lbf)
Facility water outlet
Rc1/2
28 to 30N
•
m
(20.7 to 22.1ft-lbf)
Circulating fluid supply
Rc3/4
28 to 30N
•
m
(20.7 to 22.1ft-lbf)
Circulating fluid return
Rc3/4
28 to 30N
•
m
(20.7 to 22.1ft-lbf)
Main tank drain port
Rc3/8 (with valve)
Piping not necessary
Sub tank drain port
Rc3/8 (with valve)
Piping not necessary
Drain pan port
Rc3/8
Piping not necessary
*: SS Stainless steel
Choose proper external piping with consideration for pressure,
temperature and compatibility with the circulating fluid. Potential pipe
rupture during operation may occur if disregarded.
Always insulate external circulating piping. Potential insufficient cooling
performance due to heat absorption from the pipe surface and potential
insufficient heating performance caused by thermal radiation if
disregarded.
Use clean pipes and pipe fittings, free of particles, oil and moisture.
Apply air blow to the parts before using. The presence of particles, oil or
moisture in the circulating fluid circuit causes insufficient cooling,
system failure attributed to moisture freeze when entering the system, or
foaming of the circulating fluid in the tank.
The total capacity of circulating fluid required by external piping should
remain under the capacity of the sub tank. Potential problem of tank
overflow, when pump stop, may occur if disregarded. See “Appendix 8.1.1
System specification
” in Chapter 8 for the capacity of the sub tank.
Be sure to choose a circulating fluid pipe capable of letting the fluid flow
at rated flow rate or better. See “Pump performance” defined in
“Appendix 8.1.1 System specification” for the flow rate rating.
Have a drip pan available incase of a fluid leak.
Make sure of the locations of ports for the circulating fluid supply, return,
facility water inlet, outlet and their corresponding connections are
correct.
Secure the piping connector section with a pipe wrench, and provide
proper tightening to the pipe. See Figure 3-11 on page 3-13.
Do not give an impact when the piping connector section is fixed or
tightened. It may damage the piping or cause leakage.
