Page 6 - Application Guide 04-2003 / Rooftop BALTIC Series
FEATURES AND BENEFITS CONTROL
CONTROL
CLIMATIC™ ™ 50 Software (RT50)
The new generation of microprocessor based control,
CLIMATIC™ 50 will equip the BALTIC rooftop range.
It inherits 15 years of technology and field operating experience
from its predecessors the CLIMATIC™1 and CLIMATIC™ 2.
LENNOX has found the latest hardware technology available
on the market place and developped a software specifically
designed for rooftop applications, maximising the LENNOX
rooftops efficiency and performance.
CLIMATIC™ 50 has been thought to be more user-friendly than
CLIMATIC™ 2 and easier to understand. However CLIMATIC™
50 has been designed to be as powerfull and even more flexi-
ble.
CLIMATIC™ 50 provides flexibility and the ability to control
multiple rooftops on a single job site.
Enhanced with a 16 bit processor at 14Mhz and a 2 Megabytes
flash memory, CLIMATIC™ 50 has been designed to save
energy and to extend the operational life of the BALTIC product
range. It will, for example, optimise the running time of each
compressor, automatically switch between compressors from
those that start first and have an anti short-cycle program. It is
able to control 34 fault signals and manage security algorithms
generating various fault signals.
In terms of comfort, CLIMATIC™ 50 provides an innovative
PI control.
CLIMATIC™ 50 looks at difference between set point and room
temperature and calculate the time needed to reach the set
point and determines the capacity required.
This innovative control, will garanty a better temperature
accuracy, while saving energy in not bringing the full capacity
when not needed.
As cooling is often not the only requirement, hot water coils
or electric heaters can be provided with proportional control and
heat pump with multi step regulation is available as well.
As a standard feature, CLIMATIC™50 provides 4 scheduling
time zones per day on 7 days. This allows energy consumption
management according to the building use.
On each of the 4 time zones, heating set point, cooling set point,
minimum fresh air, humidity set point high and up, and even the
different authorisations for cooling and heating can be adjusted.
CLIMATIC™ 50 provides a choice of different remote displays
depending on customer requirement and application of the
system.
As a standard feature, it is possible to set alarms (adjustable
value low and high) on room temperature and humidity.
Step of heating priority
Unique feature on the market, CLIMATIC™ 50 allows the user
to decide which heating element will come first.
This works perfectly on dual fuel unit, it is possible to pioritize
heat pump mode down to an adjustable set point (for example
0°C) and switch to gas fired mode below this value.
This gives the benefits of the excellent heat pump COP
when outside temperature is not too cold and allows to use
gas heating when temperature is lower.
Flexibility
CLIMATIC™ offers incredible flexibility. For example, advanced
user can go in the heart of the regulation in deciding reactivity
of the PI algorythm or by setting supply temperature limits .They
might even decide to authorize or not some heating or cooling
device depending of the outside temperature.
Automatic summer/winter time change
CLIMATIC™ 50 offers an automatic time switch from winter to
summer. This had always been a problem in the past for
customer to keep there rooftop at the right time, jeopardising all
their effort to optimize energy consumption by smart scheduling.
Noise reduction feature
During unoccupied timezone, BALTIC rooftop will work on half
of its capacity by using only half of the
compressors and half of the condensing fans (For double cir-
cuits rooftops).
Therefore it may cycle more often but would be quieter when
running.
This option is very often used at night when capacity needed is
lower and when noise matters more.
Last 16 faults stored in the mother board
Part of the new features of CLIMATIC™50 is the storage in the
main mother board of the last 16 faults with time, date and fault
code. This can be seen with DS50 Service Display or Climalink
Climalook.. even if those were not connected when the fault
occurred.
Staggered start feature
If there is a power shortage, units will not restart at the same
time. To make this feature available, units have to be addressed
with a different number between 1 and 12. The unit will start a
number of minutes after power return depending on its address
(Address * 10 seconds).
Example, unit number 3 will start 30 seconds after power is
back.
This is a very important feature to avoid peaks of current.
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