robatherm RM Series - Cooling Coil (CW - DX Coil)

Commissioning and Maintenance
© robatherm 37
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Cooling Coil (CW – DX Coil)
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Commissioning
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Caution
Observe general safety instructions on page 3!
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Caution
Avoid any contact with brine while charging or venting. Danger of poisoning and acid burns!
Observe manufacturer’s instructions.
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Caution
To avoid burns, do not touch hot/cold surfaces.
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Attention
Do not exceed permissible pressure range.
To avoid freezing of the cooling coil:
Add anti-freeze agent or mount the cooling coil downstream from the pre-heater.
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Inspection
Check inlet outlet connections for function (counter flow principle).
In the case of direct expansion coils, the nitrogen protection gas must escape with a hissing
noise following opening of the heat exchanger connections. Otherwise there is a leakage;
please inform our technical service.
Charging
The system must be rinsed (removal of contaminations) according to VDI 2035 and should
be filled with the heat exchanger fluid named in the design data sheet to the correct
concentration. Water quality to VDI 2035. Too high a concentration of glycol leads to
reduced performance, too low a concentration of glycol can lead to frost damage.
Venting
When charging the system according to VDI 2035 the air cooler and the system should be
vented carefully at the highest point of the system. For this purpose open the venting screw
at the top connection or open separate venting screw.
If incorrect venting takes place, cooling coils develop air locks which lead to a reduction in
capacity. Recommendation: Venting recovery system (stop-cock with hose nozzle).
After Commissioning
After commissioning check the screw fittings of the flange for leakage and retighten if
necessary (see page 12).
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