Replacement server room air
conditioning for Saga Healthcare
Orion air conditioning has completed
the installation of a replacement server
room air conditioning system for Saga Healthcare in Hatfield. The
existing mix of cassette and wall mounted air conditioning units
were R22 which is now banned for use in the UK and R407c which
is banned for use in the UK from 2015. Because the units were
old and fixed speed (either on or off according to the thermostat) the
efficiency had dropped and the technology had become outmoded.
The systems were at the end of their economical and safe
air conditioning units are renowned for long reliable life span and are
ideal for server rooms and Comm's rooms were a failure can mean
the complete shut down of an entire business or at worst server
damage. The new units are energy efficient inverter systems
which have a high COP and modulated inverter compressor which can
save up to 40% on server room air conditioning that can run 24 hours / 7 days a
Pictures of the project:
What air conditioning units were installed
at Saga Healthcare:
4 x Mitsubishi
Electric Air Conditioning Power Inverter Mr Slim
PKA-RP100KAL (10kW / 33000 Btu)
which provided enough cooling for the 15 meter square area and 6
server racks in the server room with spare cooling capacity in
case of failures. The full replacement of the existing systems
with all wall air conditioning units, instead of a mix of
cassettes was a safer option because when air conditioning unit
fails they tend to leak water. If the water leaks out of a
cassette it can drip into the top of important server equipment,
with wall units this limits the leakage to the sides of the
room. These Mitsubishi PKA-RP100KAL can be found worldwide and
have a amazing COP (3.61 x initial electrical input) which means
that every 1000w of electrical energy going in produces 3610
watts of cooling.
For more information on air conditioning
suitability for server rooms visit our
Server room air conditioning efficiency
and CO2 emissions:
This air conditioning system,
because oversized for the area meant we had spare capacity in
case of any failure on any of the systems. The clients servers
held critical medical data relating patients so could never
fail. The bonus of the extra capacity was that the systems
ticked over at sub 50% capacity and the outdoor inverter units slowed
down because the temperature had been reached, therefore just
pumping small amounts of cooling energy in to maintain the server room.
The energy saving was phenomenal and CO2 emissions significantly
Why use a Vapac humidifier for
your Server room:
The Vapac humidifier is another
world renowned product for reliable and safe production of
humidity for server rooms, this is ideal when air conditioning
is being used as it counter acts the drying affect air
conditioning tends to have on a area. The Vapac unit can be controlled by a humidistat
which gives you the option of setting the actual humidity
percentage for a particular application. For server rooms there
are two reasons why you should have humidity control. Firstly
ASHRAE’s "Design Considerations for Data and Communications
Equipment Centres" recommends relative humidity conditions
between 40% and 55%, with an allowable level between 20% and 80%.
If a server room has a very low humidity the chance of static
can rise to problem levels even with earth strips installed. Secondly if the server room is
worked in by personnel the affect of dry air sub 20% is
detrimental to health, skin and eyes.
Power / Heat-Loss Summery:
Server room efficiency: 85% approximately
Total power of servers: 20000 Watts
Total heat loss: 2550 Watts@85%
Room in Square Meters: 18750 Watts
Total Heat Load: 21300 Watts
Key points to think about when getting air
conditioning for server rooms:
Use inverter air
conditioning as it will save energy in the long run.
Always follow the
ASHRAE’s Design considerations for data and communications
equipment centres guidelines towards humidity
conditioning units do not work in cold weather because they do
not have a outside fan speed controller (low ambient kit)
Use a established
brand so if a part fails on you Server room air conditioning you
are not waiting 8 weeks for a spare part.
Sometimes it is
worth having two server room air conditioning units because if
one fails you still have some cooling.
To establish the
heat load of you servers add up all the power supplies of your
servers rack and assume a 40% loss to heat. i.e- If you have 10
servers with 400watt power supply the total watts will be 4000
watts. assuming a 40% loss the heat load will be 1600 watts.
Work on a average
watts per/Msq of 125watts, so if you server room is 5 x 5 meters
you will require a base of 3.5kw/12000btu + the heat load.
Advised manufactures for server room
air conditioning Mitsubishi, Daikin, Fujitsu and Lg
Always use auto-restart units for
server room air conditioning units as power failures can shut
budget air conditioning down.
If your server room
is temporary (ie short term lease on building) or has building
portable air conditioning maybe your only
If using portable
air conditioning for your server room then make sure it recycles
the water for better cooling performance of that it has a
integral condensate pump.
Use a established
business who will not be going out of business for your server
room air conditioning installation as the warranty of the air
conditioning is with the supplier not the manufacturer.
We offer a complete service to IT
Managers, Building Managers and Server Room / Computer / COMS room managers.
Call us for a comprehensive quotation
on varied air conditioning manufactures to suit any budget on
new installations. We have worked with many Blue-chip
organisations in helping them develop their server room air
+44(0)845 567 7080 for details on server room
humidification and air
We offer a international
supply and installation service.