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9 About the system
WARNING
Before operating the unit, be sure the
installation has been carried out
correctly by an installer.
WARNING
The appliance shall be stored so as to prevent mechanical
damage and in a well-ventilated room without continuously
operating ignition sources (e.g. open flames, an operating
gas appliance, or an operating electric heater). The room
size shall be as specified in the General safety precaution.
9
About the system
WARNING
Do NOT modify, disassemble, remove, reinstall or repair
the unit yourself as incorrect dismantling or installation may
cause an electrical shock or fire. Contact your dealer.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
10
Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
CAUTION
NEVER expose little children, plants or animals directly to
the airflow.
This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark. If your
installation has a customised control system, ask your dealer for the
operation that corresponds to your system.
Operation modes:
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
This operation manual offers a non-exhaustive overview of the main
functions of the system.
For more information about the user interface, see the operation
manual of the installed user interface.
Installation and operation manual
16
11
Operation
11.1
Operation range
The following conditions are standard operating limits. For different
conditions, please consult the dealer.
Mode
Condition Air
temperature
limit, (DB/WB)
Cooling
Min.
15/6 (RH%20)
(˚C)
Max.
33/26 (RH%58) 18/28
Heating
Min.
15/**
(˚C)
Max.
27/**
12
Energy saving and optimum
operation
Observe the following precautions to ensure the system operates
properly.
▪ Adjust the air outlet properly and avoid direct air flow to room
inhabitants.
▪ Adjust the room temperature properly for a comfortable
environment. Avoid excessive heating or cooling.
▪ Prevent direct sunlight from entering a room during cooling
operation by using curtains or blinds.
▪ Ventilate often. Extended use requires special attention to
ventilation.
▪ Keep doors and windows closed. If the doors and windows remain
open, air will flow out of your room causing a decrease in the
cooling or heating effect.
▪ Be careful NOT to cool or heat too much. To save energy, keep
the temperature setting at a moderate level.
▪ NEVER place objects near the air inlet or the air outlet of the unit.
Doing so may cause a reduced heating/cooling effect or stop
operation.
▪ Condensation may form if the humidity is above 80% or if the
drain outlet gets blocked.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
CAUTION
Do NOT operate the system when using a room
fumigation-type insecticide. Chemicals could collect in the
unit, and endanger the health of people who are
hypersensitive to chemicals.
13
Maintenance and service
13.1
Maintenance safety precautions
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
NOTICE
Keep the air filter clean and check the airflow rate
periodically.
Water
Water
temperature
delta T,
limit, (in/out)
ΔT
5/8
3 to 10
35/30
5 to 20
90/70
FWE-F
Fan coil units
3P756931-1 – 2023.11
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