Mitsubishi PFD-P250VM-E, PFD-P500VM-E, PUHY-P250YHM-A(-BS), PUHY-P500YSHM-A(-BS), PQHY-P250YHM-A DATA BOOK
CLOSE CONTROL SYSTEM
PFD-P250VM-E
PFD-P500VM-E
PUHY-P250YHM-A(-BS)
PUHY-P500YSHM-A(-BS)
PQHY-P250YHM-A
CLOSE CONTROL SYSTEM
Energy Saving Technology
Low Running Cost
The inverter driven compressors can maximize the energy efficiency of PFD series,
leading to reduction of power consumption.
PFD series coefficient of performance (COP) are over 3.00 in cooling mode.
[Sensible heat factor (SHF) : 0.93]
Low Power Consumption
Plus, new PFD series adopt advanced R410A refrigeration and control technology to offer
lower power consumption.
Inverter-driven capacity control
10HP Outdoor Unit
100%
20HP Outdoor Unit
100%
Energy Saving Technology
Minimum Humidifiers
PFD series work without a humidifier in most specifications. Due to the use of an optimized
inverter driven compressor, PFD series minimize the excessive dehumidification whereas other
systems need a separate humidifier for each indoor unit.
Saturation line
Cool down
Temperature (DB)
Absolute Humidity
Evaporation
Temperature
Common Close Control Air Conditioner
Reheating
Humidifier
needed!
Saturation line
Cool down
Humidification
Temperature (DB)
Increase evaporation
temperature by reducing
compressor speed.
Absolute Humidity
Evaporation
Temperature
No humidifier
needed!
PFD Series
Inverter Control
Compressor Capacity Control
34%
Large
PFD series operates highly efficiently with using
newly developed inverter compressor
Load
Small
No.2
Compressor
Inverter Control
No.1
Compressor Capacity Control
20%
Compressor
Inverter Control
Large
No.1
Compressor
Inverter Control
Load
Small
This system will also help to minimize maintenance costs by removing the need for a humidifier and
doing away with the need to install water pipes for individual units.
Common Close Control Air Conditioner
A humidifier can be incorporated inside of the units.
Consult our sales office in your area for more detailed
information.
PFD Series
PFD series will not have excessive dehumidification
3 4
CLOSE CONTROL SYSTEM
MITSUBISHI ELECTRIC’s Close Control System (PFD series) is
specifically designed for computer rooms, laboratories etc,
where strict control of humidity and temperature is a must.
It possesses “High Reliability”, “Energy Saving Technology”, and
“Easy Installation / Maintenance”.
It can be connected to a computer network using our AG-150A
controller, in order to monitor from a distance and provide remote
email alarms.
High Reliability
Precise Room Temperature Control
(Cooling)
PFD series maintain a nearly constant
room temperature (within ±1.0
˚C) without
the typical temperature changes that
occur with conventional ON/OFF control
systems with inverter driven compressor.
Suction air temp
Time
Quick Recovery from Power Failure
After an initial setting of outdoor unit is completed within 20 seconds of power recovery, thermo ON
signal will turn on and it will take 5 seconds for an outdoor unit fan and compressor operation to start.
PFD unit will restart within 20 seconds+(indoor unit address/2). To prevent the inrush current when
recovering from power failure, the indoor unit system will restart one by one.
(example)
PFD
ON / OFF controlled air condditioner
OUTDOOR
UNIT
INDOOR
UNIT
Power
recovery
Initial setting
Within 20 sec
Initial setting
Within 20 sec + (indoor unit address /2)
Thermo ON =
Compressor ON
5 sec
1 sec.
Indoor units start one by one every sec.
Compressor in operation
Ex. In case of indoor unit address 1
Oudoor unit recovery in 25 sec
Indoor unit recovery in 20.5 sec
Indoor unit in operation
Indoor unit in operation
Protection of Confidential Information
As a compressor has been incorporated into the outdoor unit, the compressor can be serviced without
entering a computer room. Our close control system can protect confidential information.
NEW
PFD System Rotation
One unit in a system will alternatively be in stand-by position as a back-up unit in case of malfunction.
PFD series provide you with highly reliable computer room cooling system
1
2
Loading...