V - TECHNOLOGIES VI - OPTIONS

Technical guide
V - TECHNOLOGIES
BEARING SYSTEMS
tropical environment. In particular, protection
against humidity complies with norm
NFC20703 (test 3B 21 days) # MIL STD 202*
methode 103B.
CODE 14 - The reference is followed by 3 digits.
They are allocated to each individual case.
This requirement is always produced to customers’ specification. It is suitable for fans to
operate in temperatures lower than - 10°C and
higher than + 70°C or in special environmental
conditions.
CODE 17 - This manufacturing method could
apply to marine specifications.
• Salt spray protection (non operating) E 507
specification issued by RCPM. Paragraph
3-21. Severity 6.
• Dry heat (non operating) E 507 specification
issued by RCPM-Paragraph 3-21. Severity 5.
• Damp heat (operating) NFC 20703 specification
(severity 5 Ref.3B) # MIL STD 202* methode
103B.
• Shocks (operating) NFC 20727 specification
(test 8B. Severity 30 A / 30 g - 11 ms) # MIL
STD 202* methode 213B.
• Vibrations (operating) E508 specification
issued by RCPM. Paragraph 2-32 (23 Hz;
+- 1 mm, 1 hour)
This manufacturing method applies to most
of ball-bearing fan versions.
The fan rotors are equipped with two sleeve
bearings or 2 sealed ball bearings lubricated
for life, according to the required life expectancy,
noise level and environmental conditions.
They can also be equipped with mixed bearings.
Shielded, stainless steel bearings, very high
temperature grease are available for extended
temperature range.
DESIGN CODE
Our fans can be made in accordance with four
internal manufacturing codes which are identified as follows:
a) according to the maximum air temperature
at the inlet of the fan
b) according to the climatic environment
(humidity, tropical surroundings,etc.)
The manufacturing methods are coded as follows:
CODE 11 - Suitable for fans to operate in an
atmosphere without special humidity conditions.
CODE 13 - Suitable for fans to operate in an
atmosphere between - 10°C and + 70°C in humid
VI - OPTIONS
DEGREES OF PROTECTION - IP
rotation will vary according to the ambient
temperature.
For more information regarding the VARIOSPEED
Fans, please consult factory.
ETRI supplies a full range of AC and BDC fans
offering high level of protection against dust
or water.
Most of our standard models, and all our high
performance fans are available with protection
for use in specific conditions, up to IP55
environments.
SPEED SENSORS AND ALARM SIGNALS
Most ETRI DC and AC Fans feature a speed
sensor that detects number of pulses per
revolution, or a rotation detector (on/off signal)
which indicates if the fan works correctly.
These options are codified as follow:
Speed sensor: 3 - Eg.: 280DH2LP13000
Alarm: 4 - Eg.: 280DH2LP14000
ETRI provides also a full range of alarm box (relay
+ dry contact) to read directly the signal of the
speed sensor or alarm output (see pages 164-166).
For more information regarding the protection
levels, see the corresponding table page 170.
VARIABLE SPEED
The "VARIOSPEED" option is now available on
some BDC series. With this option, the speed
CONVERGIE Group
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Website: www.etrinet.com
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