HP 40C User Manual download pdf (Page 69)

Power up procedure 69

IMPORTANT: To allow the POD ambient temperature to be raised in a controlled manner, open

the chilled water supply and return isolation valves to enable 908.49 lpm (240 gpm) at a

temperature of 13ºC to 24ºC (55ºF to 75ºF) to flow through the heat exchangers and allow the

circulation fans to bring the ambient temperature to >10ºC (50ºF).

• Portable heaters can be used to uniformly disperse supplemental heat throughout the POD.

• Electric portable heaters must be powered from an outside source.

ECS and EPO

Verify the following using the ECS touchscreen and EPO indicators:

• The ECS panel is operational and displays the user interface.

• POD lighting is operational.

• The EPO system is set to Armed (White) or Bypass (Green).

POD heating procedure

1. On the ECS touchscreen, verify that all system components are operational (green) and no alarm

conditions exist.

2. On the ECS touchscreen, verify that the POD chilled water flow rate is established on the flow rate

indicator.

3. Determine the hot aisle temperature:

o If the hot aisle temperature is at or above -25ºC (13ºF), continue to the next step.

o If the hot aisle temperature is not at or above -25ºC (13ºF), continue monitoring the hot aisle

temperature until it reaches -25ºC (13ºF) and continue this warm up procedure for 60 minutes

before proceeding.

4. Record the cold aisle temperature displayed on the ECS. The recorded temperature is the starting

temperature of the servers.

IMPORTANT: With non-operating servers, the temperature rate of change should not exceed

20ºC (68ºF) per hour. At higher elevations, the rate of change must be reduced by 1ºC (34ºF) for

every 305 m (1,000 ft) above sea level.

5. When the cold aisle temperature reaches a minimum of 10ºC (50ºF), maintain the temperature for at

least 60 minutes before proceeding.

6. Set the POD chilled water flow control and all fans to AUTO mode.

CAUTION: Do not continue the start up procedures unless the chilled water flow control valve

and the fans are in AUTO mode.

POD operation

1. In the hot aisle, close the power drop box breakers for each rack and ensure that the IT equipment is

operating.

2. In the cold aisle, monitor the flow control position, chilled water flow, and POD temperatures.

3. Wait 5 minutes to allow the system to stabilize.

The HP POD 40c G2 is now fully operational and the control system automatically controls the fans and the

flow control valve position.

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HP 40C User Manual Page 69