HP Performance-Optimized Datacenter, 12 m (40 ft) User Guide

Installation 17
8.
Inside the HP POD, close the breaker on each drop box that is connected to a rack of IT
components.
9. Power up your remaining racks and IT components, following your standard IT startup procedure.
Starting up the HP POD in cold weather
IMPORTANT: When the internal HP POD ambient air temperature is below 50°F (10°C), to
ensure that the IT is not subjected to air temperatures that are too cold, you must follow
incremental procedures.
1. Verify that all HP POD installation requirements are complete.
o All utility connections are complete, with main power breakers open and main water valves off.
o All main and branch circuit breakers are open in house panels A and B.
o Optional auxiliary power for ECS is connected from an outside power source. The ECS is
powered off.
2. When the HP POD interior space temperature is below 50°F (10°C), open the main water valves to
enable 240 gal/min of 55° to 75°F (13° to 24°C) water to flow through the heat exchangers. This
action warms the air plenum space before starting the blowers.
Portable heaters can be used as supplemental heat to uniformly disperse heath throughout the HP
POD. Electric portable heaters must be powered from an outside source.
3. Power up the ECS through auxiliary power so temperature sensors can monitor space temperature.
4. If the HP POD air plenum or hot aisle space temperature is at or above 13°F (-25°C) for at least 60
minutes, then omit this step. While water is flowing through the heat exchangers, monitor the hot
aisle space temperature until it has reached -13°F (-25°C) and continue this warm up for 60 minutes
before proceeding to the next step.
5. To energize the HP POD blowers, switch the following breakers to the closed position:
o Main power
o House panel main
o All fan power branches
NOTE: With non operating servers, HP POD space temperature rate of change should not
exceed 36°F (20° C) per hour. At higher elevation the rate of change must be reduced by
1.8°F (1°C) for every 305 m (1,000 ft) above sea level.
6. Record the cold aisle space temperature through the ECS. The recorded temperature is the starting
temperature of the servers.
7. Monitor the cold aisle temperature. Be sure to stay within the temperature rate of change. If the cold
aisle temperature rises too quickly, then temporarily suspend heating by powering off the fans or
portable heaters. Manually cycle the fans or heaters on and off to stay within the recommended
temperature rate of change.
8. When the cold aisle space temperature has reached a minimum of 50°F (10°C), continue to
maintain this temperature for at least 60 minutes before proceeding to the next step.
9. Close the Starline busway breakers and all branch circuit breakers in house panels A and B. If the
ECS is on auxiliary power, then switch ECS back to house power and disconnect the power source
to auxiliary power transformer.