2
/05.2015/
opt_CRS
EN
Please note:
• After installation and during operation, if you notice air in the pipe between the reservoir and the pump, you have
a siphoning problem. Follow advice in ‘Preventing Siphoning’.
• The pump will only switch off when the float switch is at the bottom of the reservoir.
Fault: Pump stops and starts and makes a loud noise.
1. The water is siphoning back through the pump. Follow advice in ‘Preventing Siphoning’.
Fault: Pump runs but does not pump any water.
1. Are there any air-leaks in the pipe running to the pump?
2. Check that reservoir, filter and inlet tube are free of sludge and debris.
Fault: Pump isn’t operating at all.
1. Is the pump supplied by electric power? Is it correctly wired? Is the voltage correct?
2. Is the pump very hot? A thermal cut-out may have been activated to protect pump. This will automatically be reset
when the pump has cooled down.
Frontal air discharge (not available for size S)
With this option the air is discharged through the front panel. The unit sides are designed as closed panels. This
optional configuration of air flow can be used in the following cases:
• When there’s not enough space to install the units protruding beyond the rack front line. then lateral air delivery
is not possible.
• When it is necessary to put the unit at the end of a row. In some cases, the lateral air delivery towards the end
of the row cannot be closed, because air speed from the other opening would be too high. This creates a high
depression at the intake of the rack next to the air delivery. If this depression is higher than the available ESP of
rack fans, cold air cannot enter the rack.
Inside non-compartmented server rooms, units with frontal air delivery should be installed at the
end of a rack row. The air flow should be directed towards the side with racks. A minimum distance
of 0,8 m between the end of a row and the wall is recommended to avoid that the cold air layer
adheres to the wall.
Lateral air discharge to the left
The right air discharge (seen from the user standing in front of the unit) of the CyberRow unit is closed with a plate
to avoid a waste of cold air when the air conditioning unit is placed at the end of a row.
Lateral air discharge to the right
The left air discharge (seen from the user standing in front of the unit) of the CyberRow unit is closed with a plate to
avoid a waste of cold air when the air conditioning unit is placed at the end of a row.
Only for CRS 560 CW units: by closing one lateral opening, the airflow supplied by the other ope-
ning causes an underpressure of nearly 70 Pa at the air intake of the server rack next to the unit.
For the aspiration of cold air, the fans of this server rack must have an available static pressure of
70 Pa minimum.
