AIREDALE ET05D - Page 17

Ecotel™Telecoms
17
Ecotel™ 5-15kW Technical Manual 9321381 V1.3.0 02_2018
Electronically Commutated (EC) Fan Motor
EC motors incorporate integrated electronics to convert AC power to DC for efcient and accurate speed control and are
adjustable via the microprocessor display keypad.
The fans offer maximum air ow performance while keeping sound levels to a minimum. This gives the exibility of
connecting to AC mains with the efciency and simple speed control of a DC motor. The EC fan offers signicant power
reduction in comparison with equivalent AC fan at both full and modulated fan speeds. The inbuilt EC fan control module
allows for fan speed modulation from 15-100%. A standard AC fan’s modulating range is typically 40-100% of full fan
speed.
Standard voltage regulated (VR) fan speed controllers offer a linear response. The following illustration shows a
comparison of the typical power input required by each method:
Input Power
Airflow
EC (Electronically Commutated) Fan Speed Control
Regulated (VR) Fan Speed Control
Key
Spring Return Air Damper Actuator
A spring return air damper actuator shall be tted. Manual override with integrated position stop.
G4 Filtration
Pleated disposable panel lters in a galvanised sheet frame. Conform to ISO16890. Access and removal from either
side. As standard the microprocessor provides an alarm following a pre set run time limit being exceeded.
M5 High Efciency Filters
45mm, pleated disposable panel lters conforming to ISO16890 shall be provided.
To maintain design external static pressure (ESP), fan selection may alter with high efciency lters.
Access and removal from either side of unit. As standard the microprocessor provides an alarm following a pre set run
time limit being exceeded.
Air Flow Switch
An adjustable differential pressure switch shall activate a visual alarm at the status panel. The airow fail alarm causes
the unit to go off by alarms until the airow switch is made again or the alarm is reset.
Introduction