Environmental requirements
This chapter describes the environmental requirements for IBM z14 Model ZR1 servers. It also lists the dimensions, weights, power, and cooling requirements that are needed to plan for the installation of an z14 ZR1 server.
The following features are available for physically installing the server:
•Air cooling
•Installation on a raised floor or non-raised floor
•I/O and power cables can exit under the raised floor or off the top of the server frame
•AC power supply
For more information about physical planning, see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
This chapter includes the following topics:
 
10.1 Power and cooling
The z14 ZR1 server is a 19-inch, single-frame system that supports installation on a raised floor or non-raised floor.
The following features are available to allow I/O cables and line cords to exit the frame from the top, bottom, or both sides of the frame:
•Top Exit cabling feature (FC 7917). For more information, see 10.3.2, “Top Exit cabling feature (optional)” on page 350.
•Bottom Exit cabling feature (FC 7919). For more information, see 10.3.4, “Bottom Exit cabling feature” on page 352.
10.1.1 Power requirements and consumption
This section describes the power requirements and consumption for z14 ZR1 servers.
Power requirements
The z14 ZR1 is designed with a fully redundant power system. It has one or two intelligent Power Distribution Unit (PDU) pairs to power the components of the server. To make full use of the redundancy that is built into the server, the PDUs within one pair must be powered from different power distribution panels. In that case, if one PDU in a pair fails, the second PDU ensures continued operation of the server without interruption.
The second PDU pair is installed when the second PCIe+ I/O drawer or the 16U Reserved feature is ordered. For more information, see Figure 10-1 and Table 10-1 on page 345.
Power cords for the PDUs are attached to 1-phase, 50/60 Hz, 200 - 240 V AC power.
Figure 10-1 The PDU pairs in the rear of the frame
For non-IBM Z components in the optional 16U Reserved rack space, such as the rack-mounted Hardware Management Console (HMC), and its Keyboard/Mouse/Monitor (KMM) assembly, use the appropriate PDU outlets.
For more information, see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
Table 10-1 PDU pairs driven by I/O Drawers and 16U Reserved feature
PCIe+ I/O drawers
0
1
2
3
4
PDU pairs
1
1
2
2
2
Notes: Adding the 16U Reserved feature (FC 0617) to the rack always drives the second PDU pair.
 
Each PDU features one 30 A line cord. Therefore, the number of line cord pairs is the same as the number of PDU pairs.
Power consumption
The maximum power consumption for the z14 ZR1 is listed in Table 10-2.
Table 10-2 Power consumption (kW)
CPC drawer feature
Number of PCIe+ I/O drawers
0
1
2
3
4
Max4 (FC 0636)
1.36
2.26
-
-
-
Max12 (FC 0637)
1.77
2.67
3.58
-
-
Max24 (FC 0638)
2.59
3.48
4.39
5.29
6.12
Max30 (FC 0639)
2.59
3.48
4.39
5.29
6.12
Note: The power consumption numbers that are listed in this table assume that the CPC drawer and PCIe+ I/O drawers include the maximum power features (that is, memory and I/O adapters and fanouts). Also assumed is that the system is running at the maximum allowable ambient temperature.
 
Considerations: The total power capacity that is available for the non-IBM Z components in the 16U space is 3400 W (for more information, see Appendix G, “16U Reserved feature” on page 465).
Power consumption is lower in a normal ambient temperature room, and for configurations that feature a lesser number of I/O slots, smaller amount of memory, and fewer PUs.
Power estimation for any configuration, power source, and room condition can be obtained by using the power estimation tool that is available at the IBM Resource Link website (login required).
On the Resource Link page, click Tools → Power and weight estimation.
10.1.2 Cooling requirements
The z14 ZR1 servers are air-cooled. They require chilled air, ideally coming from under a raised floor, to fulfill the air-cooling requirements. However, a non-raised floor option is available.
The front-to-rear airflow within the system is regulated by intake fans in the front of the machine for the CPC and the PCIe+ drawers. Therefore, all cabling exits the z14 ZR1 from the rear of the machine.
z14 ZR1 servers include a recommended (long-term) ambient temperature range of 18°C (64.4°F) - 27°C (80.6°F). The minimum allowed ambient temperature is 5°C (41°F) and the maximum allowed temperature is 40°C (104°F).
 
Consideration: When the 16U Reserved feature (FC 0617) is installed, all customer-installed hardware in those 16U must meet the front-to-rear airflow requirement.
All z14 ZR1 components meet ASHRAE A3 environmental class level. Therefore, any non-IBM Z components that are installed in the 16U Reserve space of the rack with ASHRAE class below A3 lower or restrict the ASHRAE class of the full rack.
When two or more PCIe+ drawers are installed, or the 16U Reserved is ordered, more hardware in the form of a cable management spine is installed to route cabling through the frame without blocking the front-to-rear airflow.
For more information about the environmental specifications, see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
Rack placement
The z14 ZR1 system is built in an IBM 19-inch rack that fits most standardized data centers and simplify installation.
A generic example of hot and cold airflow and the arrangement of server aisles is shown in Figure 10-2.
Figure 10-2 Hot and cold aisles
As shown in Figure 10-2, rows of servers must be placed front-to-front. Chilled air is provided through perforated floor panels that are placed in rows between the fronts of servers (the cold aisles). Perforated tiles generally are not placed in the hot aisles.
If your computer room causes the temperature in the hot aisles to exceed a comfortable temperature, add as many perforated tiles as necessary to create a satisfactory comfort level. Heated exhaust air exits the computer room above the computing equipment.
For more information about the requirements for air-cooling options, see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
10.2 Physical specifications
This section describes the weights and dimensions of z14 ZR1 server. The z14 ZR1 is the first IBM Z server that is based on a 19-inch rack; therefore, dimensions and weights are significantly different from previous generations of IBM Z servers.
The z14 ZR1 can be installed on a raised or non-raised floor. For more information about weight distribution and floor loading tables, see the IBM 3907 Installation Manual for Physical Planning, GC28-6974. This data is used with the maximum frame weight, frame width, and frame depth to calculate the floor loading.
 
Note: Components that are installed in the 16U Reserve feature space must not weigh more than 20.4 kg (45 lbs) per EIA location. For example, a 4U unit can weigh up to 81.65 kg (180 lbs).
The power and weight estimation tool for Z servers on Resource Link covers the estimated weight for your designated configuration. The tool is available for download from the IBM Resource Link website (login required).
On the Resource Link page, click Tools → Power and weight estimation.
10.3 Physical planning
This section describes the floor mounting, power, and I/O cabling options. For more information, see the IBM 3907 Installation Manual for Physical Planning, GC28-6974.
10.3.1 Raised floor or non-raised floor
z14 ZR1 servers can be installed on a raised or non-raised floor. The following options and features are available for I/O cabling and line cords.
 
Note: On the z14 ZR1, all I/O cabling and line cords come from the rear of the machine; therefore, all related features for Bottom and Top Exit cabling are in the rear of the frame.
Raised floor
If the z14 ZR1 server is installed in a raised floor environment, the following top and bottom exit features or options are available to route I/O cables and line cords:
•Optional1 Top Exit cabling feature (FC 7917)
•Route cabling directly through the top of the frame
•Bottom Exit cabling feature (FC 7919)
The Top Exit and Bottom Exit cabling feature options of z14 ZR1 servers in a raised floor environment are shown in Figure 10-3.
Figure 10-3 Raised floor options
Non-raised floor
If you install the z14 ZR1 server in a non-raised floor environment, you can select the optional2 Top Exit cabling feature (FC 7917) or you can directly route the cabling through the top of the frame. All cables must exit from the top of the z14 ZR1 server, as shown in Figure 10-4.
Figure 10-4 Non-raised floor options
10.3.2 Top Exit cabling feature (optional)
The optional Top Exit cabling feature (FC 79176) allows for I/O cabling and line cords to exit the top of the frame. This feature adds cable management options, such as trunking and retainer brackets, as shown in Figure 10-5. The Top Exit cabling feature can be placed as shown in Figure 10-5, with the exit area towards the front of the frame, or with the exit area towards the rear of the frame.
Figure 10-5 Top Exit cabling feature
The Top Exit cabling feature adds 117.5 mm (4.63 in.) to the height of the frame and approximately 5.4 kg (12 lbs) to the weight.
If the Top Exit cabling feature is not ordered, two sliding plates are available on the top of the frame (one on each side of the rear of the frame) that can be partially opened. By opening these plates, I/O cabling and line cords can exit the frame, as shown in Figure 10-6.
Figure 10-6 Sliding panels (no Top Exit cabling feature)
10.3.3 Top or bottom exit cables
Features allow for Top Exit Cabling (FC 7917) or Bottom Exit Cabling (FC 7919) cabling, or a combination of both. These features are independent of raised floor or non-raised floor installations and offer flexible possibilities for the data center.
All external cabling enters the rear of the rack from under floor or from above the rack. Different from previous Z Systems, no cabling access or cable plugging is available at the front of the rack. The top view of the rack with and without FC 7917 is shown in Figure 10-7.
Figure 10-7 ZR1 rack with and without the Top I/O Exit feature
The Top Exit Cabling feature provides new hardware. The new hardware resembles a rectangular box with an open side that faces the front or rear of the rack. It includes other hardware to organize and fasten cables.
The Top Exit Cabling option can be used for routing power cables and IO cables out the top of the machine.
Without the Top Exit Cabling feature, power and cables still can be run out the top of the rack through two adjustable openings at the top rear of the rack, as shown on the left side of Figure 10-7.
The Bottom Exit Cabling feature provides tailgate hardware for routing power cables or IO cables out the bottom of the machine.
For more information, see IBM 3907 Installation Manual for Physical Planning, GC28-6974, and 10.3, “Physical planning” on page 348.
10.3.4 Bottom Exit cabling feature
The Bottom Exit cabling feature (FC 7919) is required for raised floor environments, where I/O cabling or line cords must exit from the bottom of the frame. This feature includes the hardware to allow bottom exit, and other components for cable management and filler plates to preserve the recommended air circulation, as shown in Figure 10-8.
Figure 10-8 Bottom Exit cabling feature
10.3.5 Frame Bolt-down kit
A bolt-down kit (FC 8006) is available for the z14 ZR1 servers. The kit provides hardware to enhance the ruggedness of the frame, the frame stiffener, and to tie down the frame to a concrete floor.
The frame tie-down kit can be used on a non-raised floor where the frame is secured directly to a concrete floor, or on a raised floor where the frame is secured to the concrete floor underneath the raised floor. Raised floors 241.3 mm (9.5 inches) - 1270 mm (50 inches) are supported.
The kits help secure the frames and their contents from damage when they are exposed to shocks and vibrations, such as in a seismic event. The frame tie-downs are intended for securing a frame that weighs up to 1308 kg (2885 lbs).
For more information see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
10.3.6 Service clearance areas
z14 ZR1 servers require specific service clearance to ensure the fastest possible repair in the unlikely event that a part must be replaced. Failure to provide enough clearance to open the front and rear covers results in extended service times or outages.
For more information, see IBM 3907 Installation Manual for Physical Planning, GC28-6974.
10.4 Energy management
This section describes the elements of energy management to help you understand the requirements for power and cooling, monitoring and trending, and reducing power consumption. The energy management structure for the server is shown in Figure 10-9.
Figure 10-9 z14 energy management
The hardware components in the z14 ZR1 server are monitored and managed by the energy management component in the Support Element (SE) and HMC. The graphical user interfaces (GUIs) of the SE and HMC provide views, such as the Monitors Dashboard and Environmental Efficiency Statistics Monitor Dashboard.
The following tools are available to plan and monitor the energy consumption of z14 ZR1 servers:
•Power estimation tool on Resource Link
•Energy Management task for maximum potential power on HMC and SE
•Monitors Dashboard and Environmental Efficiency Statistics tasks on HMC and SE
10.4.1 Environmental monitoring
This section describes energy monitoring HMC and SE tasks.
Monitor task group
The Monitor task group on the HMC and SE includes monitoring-related tasks for z14 ZR1 servers, as shown in Figure 10-10.
Figure 10-10 HMC Monitor task group
Monitors Dashboard task
In z14 ZR1 servers, the Monitors Dashboard task in the Monitor task group provides a tree-based view of resources. Multiple graphical views display data, including history charts. This task monitors processor and channel usage. It produces data that includes power monitoring information, power consumption, and the air input temperature for the server.
An example of the Monitors Dashboard task is shown in Figure 10-11.
Figure 10-11 Monitors Dashboard task
Environmental Efficiency Statistics task
The Environmental Efficiency Statistics task (see Figure 10-12) is part of the Monitor task group. It provides historical power consumption and thermal information for the CPC.
The data is presented in table format and graphical “histogram” format. The data can also be exported to a .csv-formatted file so that the data can be imported into a spreadsheet. For this task, you must use a web browser to connect to an HMC.
Figure 10-12 Environmental Efficiency Statistics task
 
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