CoolTherm
Manual / Bedienungsanleitung
3.5Control
The server cabinet temperature is controlled by the fan control board VR 2.2. A air temperature sensor continuously measures the temperature of the server cabinet (server feed air). The air circulation flow rate is controlled by the fan speed according to the current thermal load.
At temperatures lower than 20°C / 68°F fans rotate at 75% of maximum speed.
Between 20°C / 68°F and 23°C / 73,4°F speed increases proportional to the temperature up to 96% of maximum speed.
The failure of the temperature sensor set the fans to maximum speed.
Air temperature sensor
PDU – Box*)
*) by 12 kW rack under the roof
Status LED:
Green
System OK
Yellow
fault controller cooling/fans or rear door open
Red
fault controller cooling/fans and rear door open
Fuses for each fan and switching power supply
Space for optional equipment
Service socket and fuse
CoolTherm front view
The water flow rate is controlled by a
By using a blind sieve in the bypass a hydraulic volume control could be achieved (two way valve function).
In case of failure the valve opens and the all the chilled water flows through the heat exchanger. From 16°C / 60,8°F to 19°C / 66,2°F the
CoolTherm | 01_998_330_0_k | page / Seite 15/83 |