Hydraulic set
80 © robatherm
Hydraulic set
Do not exceed approved pressure rating.
Observe technical data sheet.
In the case of a run around coil, the amount of frost protection agent must be selected depending on
the lowest outside air temperature (observe the manufacturer's information).
If no condensate pan is provided underneath a (HE-)RAC heating coil, the HRS system may only be
operated if no condensate is produced.
Inspection
Check for:
• proper installation of all parts
• correct connection of flow and medium return (counterflow principle)
• tight fit of all screw connections and stuffing-box seals
• Movement of all valves, slides, and flaps
Flushing
NOTE
Material damage due to inadequate flushing
If there is no or insufficient system flushing, oil residues may remain in the coil
(lubrication during the production process). Water/frost protection mixtures have
lipophilic properties, which dissolves the oil in the mixture. Subsequently, an
oil/water/frost protection mixture circulates inside the system and damages seals that
are not oil-resistant.
• Flush the system according to VDI 2035. Oil residues are dissolved during the
flushing process.
• In closed system circuits (e.g., RAC/ HE-RAC circuits) use oil-resistant seals.
The system must be flushed in accordance with VDI 2035 (removal of contamination). The oil residues
must be dissolved during the flushing process, otherwise they will remain in the system.
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