SMC Networks HRSH100-A 20 Series - Operation at Low Ambient Temperature or Low Circulating Fluid Temperature

HRX-OM-Q026
Chapter 3 Transport and Setting Up
3.2 Installation HRSH Series
3-6
3.2.2 Operation at low ambient temperature or low circulating fluid
temperature
(1) Circulating fluid
In order to avoid freezing of the circulating fluid, use aqueous solution of ethylene glycol.
Ambient temperature (°C)
Recommended circulating fluids
10 to 45
Tap water, ethylene glycol aqueous solution 15(wt)%
-5 to 10
Ethylene glycol aqueous solution 15(wt)%
-20 to -5
Ethylene glycol aqueous solution 40(wt)%
Circulating fluid
temperature(°C)
Recommended circulating fluids
10 to 35
Tap water, ethylene glycol aqueous solution 15(wt)%
5 to 10
Ethylene glycol aqueous solution 15(wt)%
Note 1) Concentration has to be 40(wt)% or less.
If the concentration is higher than 40(wt)%, pump will be overloaded.
Note 2) When 40% ethylene glycol aqueous solution is used, cooling capacity decreases
by 20%.
(2) And following instructions must be executed. If following instructions are not executed, not
only Thermo-chiller alarm will be generated, but also damage of the product can result.
- Power has to be supplied to the Thermo-chiller all the time.
- Turn on anti-freezing function (set parameter: SE.10) all the time.
- When the power supply to the Thermo-chiller is stopped for a long period of time,
discharge all the circulating fluid in the Thermo-chiller and customer's device and
piping. When the Thermo-chiller is refilled with the circulating fluid, supply the fluid
at normal temperature.