374 IBM z13s Technical Guide
10.1.7 New environmental class for IBM z13s servers: ASHREA Class A3
ASHRAE
2
(American Society of Heating, Refrigerating, and Air-Conditioning Engineers) is an
organization devoted to the advancement of indoor-environment-control technology in the
heating, ventilation, and air conditioning industry.
The IBM z13s server is the first z Systems server to meet the ASHRAE Class A3
specifications. Environmental specifications are presented in two categories:
Required and
Recommended. Obviously, meeting the required specifications is prerequisite to using the
z13s servers.
IBM strongly suggests you strive for more than the minimum requirements. The powerful
computing that z13s servers provide generates a great deal of heat. That heat must be
removed from the equipment to keep it operating at peak efficiency. Cooling the servers can
result in condensation on critical internal parts, leading to equipment failure, unless the
computer room environment is adequately maintained to prevent it. That is where operating
your data center with the goal of reaching recommended specifications instead of just the
required numbers will pay off for you.
Figure 10-3 depicts the environmental limits for previous and current generation of z Systems
servers.
Figure 10-3 Recommended environmental conditions
10.2 IBM z13s physical specifications
This section describes the weights and dimensions of z13s servers.
2
http://www.ashrae.org
A1
A2
A3
Temp range 15C (59F) to 32C (89.6F)
RH range 20% to 80%
Max dew point 17C (62.6F) (note 1 )
Alt 10,000 ft.
Temp range 10C (50F) to 35C (95F)
RH range 20% to 80%
Max dew point 21C (69.8F) (note 1)
Alt 10,000 ft.
Temp range 5C (41F) to 40C (104F)
RH range -12C (10.4F) min dewpoint; 8% to 85%
Max dew point 24C (75.2F) (note 1)
Alt 10,000 ft.
Temp range 18C (64.4F) to 27C (80.6F)
RH range 5.5C (41.9F) min dewpoint; up to 60%
Max dew point 15C (59F) (note 1)
zEC12
zBC12
z13
z13s
Recommended
(all)
Note 1: Actual inlet air moisture content range (grams moisture/Kg dry air)
A1: 2 - 12
A2: 1.5 - 16
A3: 1.5 - 19
Recommended: 6.2 - <10
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