Chilled Water Supply And Return Header Pressure Sensors - HP Performance Optimized Datacenter 20c Maintenance And Service Manual

IMPORTANT:
the fluid system isolation process that your site established.
•
Removal of a sufficient amount of chilled water from the HP POD 20c to keep the installed IT equipment
from getting wet.
•
Testing of the fluid system integrity to be sure that overall integrity is re-established before returning the
HP POD 20c to normal operation.
The HP POD 20c fluid system includes the following:
•
All chilled water system piping, piping connections, and valves
•
Chilled water heat exchangers
•
System penetrating installed sensors:

Chilled water supply and return header pressure sensors

o
Chilled water supply and return header temperature sensor
o
Chilled water flow meter sensor
o
Chilled water supply and return header pressure sensors
The HP POD 20c contains two chilled water pressure sensors. One is located in the chilled water supply
header and one is located in the return header.
The chilled water supply and return header pressure sensors are located in the cold aisle where the headers
penetrate the HP POD 20c.
You need a wrench to remove and replace the pressure sensors.
Removing the chilled water supply and return header pressure sensor
Observe the sensor alignment direction.
1.
Disconnect the sensor wiring.
2.
Using a wrench, disconnect the sensor from the tubing connection by rotating the nut counterclockwise.
3.
To isolate the POD chilled water system from the site chilled water system, follow
Removal and replacement procedures 45