IBM 9835-415, Deployment Manual

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Sound pressure
Hearing protection must be worn while you service the FlashSystem A9000R
system.
Attention: Depending upon local conditions, the sound pressure might exceed 85
dB(A) during service operations. When working on the FlashSystem A9000R
system while either the front or rear door is in the open position, hearing
protection must be worn.
CAUTION:
Depending upon local conditions, the sound pressure might exceed 85
dB(A) during service operations. Hearing protection must be worn when you are
in a room that has an FlashSystem A9000R system while either the front or rear
door is open or when the front and rear doors are not installed.
Leakage current
The FlashSystem A9000R system incorporates electromagnetic-interference filter
capacitors that are required to prevent electrical noise from penetrating the power
grid. A characteristic of filter capacitors, during normal operation, is a high amount
of leakage current.
Depending on the storage configuration, this leakage current can reach 100 mA.
For the most reliable operation, do not use Ground Fault Circuit Interrupter
(GFCI), Earth Leakage Circuit Breaker (ELCB), and Residual Current Circuit
Breaker (RCCB) type circuit breakers with a FlashSystem A9000R system. The
FlashSystem A9000R system is certified for safe operation and is compliant with
IEC, EN, UL, CSA 60950-1 standards. However, if leakage detection circuit breakers
are required by local electrical practice, the breakers must be sized for a
leakage-current rating of 300 mA or greater to reduce the risk of server outage
caused by erroneous and spurious tripping.
Site preparation
The IBM service representative can only minimally reposition the rack at the
installation site, as needed to service the FlashSystem A9000R system. The
customer is responsible for using professional movers or riggers in the case of
equipment relocation or disposal.
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IBM FlashSystem A9000R Models 9835-415 and 9837-415 Deployment Guide