Multifan 31EG81 Instrucciones De Instalación página 7

Panel Fan
4.2.1 Thermal protection
1~ fan motor thermal protection
Thermal detectors are built-in standard in 1~ fan motors. Thermal detectors
are of the thermostat type TB: thermostat opening on increase of
temperature.
In 1~ fan motors, the thermostat (TB) is by default wired in series with the
phase (L) of the supply. The motor is as such self-resetting: when the motor
overheats, the thermostat will switch off the motor automatically and once the
motor has cooled down, the motor will start automatically again.
The presence of the text "Thermally Protected" on the rating plate and/or
datasheet indicates that thermal protection is built-in the 1~ fan motor and that
it is wired in series with the phase (L) of the supply.
WARNING
If the unexpected start of the motor by the thermostat can
cause a hazard or is prohibited by local regulations, the ther-
mostat must be connected into a control circuit that will not al-
low the motor to restart until the circuit is manually reset.
3~ fan motor thermal protection (optionally available)
Thermal detectors are optionally available in 3~ fan motors. Thermal
detectors are of the thermostat type TB: thermostat opening on increase of
temperature.
In 3~ fan motors, the thermostats (TB) are by default wired to separate
terminals on the terminal block. An external control circuit can be connected
here. NOTICE! The thermostats in 3~ fan motors cannot be
wired in series with the power supply.
Maximum thermostat (TB) load
When connecting an external control circuit to the thermostats, the following
load limits must be observed:
AC ≤ 500 V
≤ 1.6 A
Cos φ ≥ 0.6
DC ≤ 12 V
≤ 40 A
Table 1: Maximum thermostat (TB) load
4.2.2 Speed control
Verify that this fan is suitable for speed control. On the datasheet and rating
plate the following (combination of) codes can be found:
F = suitable for frequency control / VFD (Variable Frequency Drive)
E = suitable for electronic voltage control (TRIAC / phase cutting)
T = suitable for transformer voltage control
WARNING
If none of these codes is listed, this fan cannot be speed con-
trolled!
Variable Frequency Drive (FC / frequency control)
• Do not reduce the frequency to less than 20% of the nominal frequency
as listed on the rating plate.
• When using a variable frequency drive, the wiring instructions of the vari-
able frequency drive manufacturer must be followed.
INS00002- B Original instructions
WARNING
Do not increase the frequency beyond the nominal value as
listed on the rating plate
Electronic Voltage Control (TRIAC / SOLID-STATE / phase
cutting)
• Do not reduce the voltage to less than 40% of the nominal voltage as
listed on the rating plate.
• Motor noise (humming) can occur due to this type of control
Transformer voltage control
• Do not reduce the voltage to less than 40% of the nominal voltage as
listed on the rating plate.
For US only:
For 3~ fans only:
WARNING
To Reduce The Risk of Fire or Electric Shock, Do Not Use This
Fan With Any Solid-State Speed Control Device
For Canada only:
For 3~ fans only:
WARNING
NOT SUITABLE FOR USE WITH SOLID-STATE SPEED CON-
TROLS
4.3 UL Installation instructions
WARNING
To reduce the risk of fire, electric shock, or injury to persons,
observe the following:
• Installation work and electrical wiring must be done by qualified per-
son(s) in accordance with all applicable codes and Standards, including
fire-rated construction.
• Sufficient air is needed for proper combustion and exhausting of gases
through the flue (chimney) of fuel burning equipment to prevent back
drafting. Follow the heating equipment manufacturer's guideline and
safety Standards such as those published by the National Fire Protection
Association (NFPA), and the American Society for Heating, Refrigeration
and Air Conditioning Engineers (ASHRAE), and the local code authori-
ties.
• When cutting or drilling into wall or ceiling, do not damage electrical
wiring and other hidden utilities.
• Ducted fans must always be vented to the outdoors.
Hose down
This fan is IP55 and can be hosed down with water. The installer is to use
rigid conduit or electrical metallic tubing with rain-tight fittings, or liquid-tight
flexible metal or non-metallic conduit with acceptable fitting.
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