HRX-OM-X010
Chapter 4 System Startup and Shutdown
4.3 Supply of Circulating Fluid HRZ Series
4.3 Supply of Circulating Fluid
4.3.1 Preparation of circulating fluid
When the circulating fluid is a 60% ethylene glycol aqueous solution
Always check the concentration of the circulating fluid.
When the circulating fluid is a fluorinated fluid
When the circulating fluid is water
Figure 4-1 Circulating Fluid Filll Port and Circulating Fluid Level Gauge
Circulating fluids to use vary with system models.
See section 8.1.1 “System specification” in Chapter 8 for the
designated circulating fluid for a specific model.
Low concentration EG in the circulating fluid may cause system failure due to it being frozen in the
system.
High concentration EG in the circulating fluid may cause circulating pump overload, which triggers
“Return Low Flow FLT”.
Potential cooling error may occur if the circulating fluid varies in concentration.
Make sure of no oil, moisture, and other foreign materials contaminate the
circulating fluid. Potential cooling error or system failure, due to contaminant
freezes internally, may occur if disregarded.
Attention should be taken on water quality. Ensure water quality is within specified
range, and other foreign materials contaminate the circulating fluid. Potential
cooling error or system failure, due to contaminant freezes internally, may occur if
disregarded.
Circulating fluid fill port
Circulating fluid level gauge
Circulating fluid
specified level
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