User's Manual

Frequently asked questions 58
Frequently asked questions
In this section
HP Modular Cooling System frequently asked questions.............................................................................. 58
HP Modular Cooling System frequently asked
questions
Question Answer
What cooling capacity ranges are
available in the MCS unit?
The cooling capacity of the heat exchanger units depends on the
water supply temperature and the server inlet set point. The MCS
unit is capable of cooling rack-mounted components consuming up
to 35 kW of electrical power.
Is special IT equipment required for
use with the MCS unit?
No, all IT equipment that uses the front-to-back cooling system (99%
of IT equipment) can be used without restriction in conjunction with
the MCS unit.
Does the additional heat from the
MCS unit increase the room
temperature?
In some cases, up to 10% of the total power supplied to the rack
may be lost to the room, depending on the server air setting and the
room temperature.
Can the level of heat removal be
regulated in proportion to the waste
heat generated?
Yes, the control system automatically adjusts the water flow and air
flow to remove heat generated in the rack.
How is water connected to the MCS
unit?
The water is connected to the unit using a 1 1/4 in flexible hose
and quick-disconnect automatic shutoff hose fittings. For more
information, see the HP Modular Cooling System Site Preparation
Guide on the HP website.
Can the MCS unit operate with the
front or rear door open?
Yes, due to the air curtain effect, the air will function normally with
little air lost. When the doors are open during operation, room air
mixes with air supplied to the servers.
Does the MCS unit require
maintenance?
No, assuming that the water quality is maintained, the MCS unit is
maintenance-free. For more information about water quality, see the
HP Modular Cooling System Site Preparation Guide on the HP
website.
Is a false floor necessary? No, a false floor is not necessary to operate the MCS unit. For more
information, see the HP Modular Cooling System Site Preparation
Guide on the HP website.
Does condensation form? During normal operation some condensation may form, but the MCS
unit condensation control system ensures that the condensation does
not reach any rack-mounted components or cause any damage. In
most cases, the condensation evaporates prior to reaching the MCS
unit condensation control system.
How does the MCS unit control
humidity?
There is some room-air interchange, so the moisture content of the
air inside the unit is the same as the room.