Lennox FLEXY FX 025 Application Manual page 11

GENERAL DESCRIPTION
CONTROL
OPTIONAL
Advance control pack (control of humidity and enthalpy
control on economizer)
Where a higher level of controllability is required to make the
FLEXY FX even more fl exible, LENNOX have compiled a pack
that includes two advanced control features.
-»Enthalpy control on economiser».
Software and its sensors will ensure that the economiser does
not use 100% fresh air if the outside air has a higher enthalpy
than the return air. This feature is relevant in regions where the
relative humidity is high or when the desired room air condition
is very dry.
- «Humidity control» software and its sensors, are able to ana-
lyze dry and wet bulb temperatures, and therefore can control a
dehumidifi cation algorithm. This will dehumidify the air in cooling
mode as it passes through the coil, then reheating it with either
electric heater or hot water coil. If there is a need to humidify the
air, a proportional signal is now available to control a humidifi er
that will be provided by the customer.
DC 50 : Comfort
Display
This is a remote control-
ler for non-technical
customer. It has been
wanted to aesthetically
fi t inside a room and be
very easy to use. It can
be installed at maximum
500 meters from the unit.
This graphical display gives information such as running mode
of the unit, status of the fan, set point, % of fresh air, outside air
temperature.
Customer can change the scheduling of the different time zone,
can modify temperature set point and % of fresh air for each zone.
Customer can also override the scheduling in either changing the
set point for 3 hours or in forcing the rooftop to unoccupied mode
for 1 to 7 days. ON/OFF key is also available.
DC50 Comfort display shows faults number when rooftop is in the
failure mode. Customer can reset fault thanks to a combination
of keys.
Time and day of the rooftop can be seen and modifi ed easily
through the DC50.
DM 50 : Multi rooftop Display
The DM 50 display has the exact same features of the DC50, but
it can manage up to 12 rooftops on a single Bus. On a multirooftop
site it makes the installation less expensive because, not only
because of DM50 price, but because only one bus-wire has to be
connected down to the DM50.
Application Guide • FLEXY FX-AGU-1112-E
DS 50 : Service Display
This service display controller directly plugs on the unit.
This allows service personal to set up to 207 settings, read up
to 188 variables, up to 45 faults and read the history of the last
32 faults.
This controller has been designed to be very user friendly, with 6
different keys, a 4 lines display and this controller includes scrolling
menus and true language (no codes). It will be in English or another
alternate language. (12 different languages are available today)
TCB (Thermostat Control Board)
This board has been developed for any customer who wants
to take over the control of the unit. With 6 logical inputs (Com-
pressor stage 1 and stage 2, heating step 1 and 2, change-over
compressor and fan), this board will replace the control algorithm.
However CLIMATIC 50 controller will stay in charge of all safety
algorithm, defrost operation or free cooling operation. All Input is
volt free contact.
This is the perfect board, to have FLEXY FX rooftop managed by
a zoning system, a universal thermostat or even a BMS system.
Communication interface / Modbus interface
Electronic board needed for ADALINK use. One board required
per rooftop.
This board is a well a modbus interface, which is needed for
anyone who would like a BMS system to talk to the FLEXY FX with
«Modbus protocol» with RS485. No other hardware than this board
is required to have modbus dialog. One board required per rooftop.
This board is required when ADALINK is used.
LonTalk® interface
This board is a LonTalk® interface, which is needed for anyone
who would like a BMS system to talk to the FLEXY FX with «Lon
protocol» with FTT10. No other hardware than this board is required
to have LonTalk® dialog. One board required per rooftop.
Bacnet® interface
This board is a Bacnet® interface, which is needed for anyone
who would like a BMS system to talk to the FLEXY FX with "Bacnet
protocol» RS485.
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