AIREDALE ET05D - Airflow Components

Ecotel™ Telecoms
16
Ecotel™ 5-15kW Technical Manual 9321381 V1.3.0 02_2018
Airow Components
Features
System Conguration
ET05/08D-HX ET12/15D-HX
Airow
EC Centrifugal Evaporator Fans
● ●
Upgraded EC Centrifugal Evaporator Fans
○ ○
-48VDC Centrifugal Evaporator Fans
○ ○
AC Axial Condenser Fan
● ●
EC Axial Condenser Fan
○ ○
230VAC Air Damper Actuator - Spring Return
● ●
-48VDC Air Damper Actuator - Spring Return
○ ○
G4 Filtration
● ●
M5 Filtration
○ ○
● Standard Features ○ Optional Features — Feature Not Available
EC Centrifugal Fan
Evaporator Fans
The evaporator fans used in the Ecotel units shall be backward curved, centrifugal EC plug fans. They shall be speed
regulated via a 0-10V signal supplied as an analogue output from the controller. The evaporator fans shall operate
differently depending on which mode the unit is in.
● In freecooling mode, the speed of the evaporator fans shall be regulated to determine the amount of outdoor air
supplied into the cabin, and therefore used to maintain the temperature setpoint.
● In concurrent mode, the evaporator fan speed shall be xed at a design speed to help maintain the temperature
setpoint without causing moisture carryover from the evaporator coil.
● In mechanical mode and heating mode, the evaporator fan speed shall be xed at a design speed. This is to
prevent moisture carryover in mechanical mode, and to ensure sufcient airow over the heating elements in
heating mode.
An upgraded evaporator fan shall be available if additional freecooling is required.
Condenser Fan
The condenser fan used in the Ecotel units shall be an axial fan. As standard an AC fan will be used, however, an
optional EC variant shall be available to aid in increasing the overall unit efciency (EER). In both circumstances, the
speed of the fan is to be controlled via a 0-10V signal which is sent from the controller as an analogue output.
The air path for the condenser fan and coil is isolated from any other part of the system. Neither supply nor return air is
used to cool the condenser coil. The speed of the condenser fan shall be regulated to control head pressure when the
refrigeration circuit(s) are being used in concurrent and mechanical modes.
Spring Return Air Damper Actuator Fire Rated Damper
Introduction