Unit installation

035-000040-001 Page 10 of 18 DVA IOM 1.3 08-18-2014
ECM APPLICATION GUIDELINES
DV units with ECM motor have 5 pre-
programmed speeds to choose from. Which
speed is active is selected using the terminal
block.
How it works: Airflow, RPM and static pres-
sure is similar to a PSC motor but more sta-
ble and much more efficient.
1. As system static pressure goes up, RPM
goes up and CFM goes down.
2. At around 1050rpm, as SP increases,
CFM decreases rapidly down to zero at
1200rpm.
How to select the fan speed:
1. Use the airflow tables to locate the de-
sired operating point.
2. Identify the corresponding tap number
from the table.
3. Move Violet wire (504) to the matching
connection on terminal block TB2.
How to integrate with 24V thermostat:
Connect R, C and G connections on terminal
block TB1 to matching connections on ther-
mostat. Energizing the G connection will start
the fan.
Figure 6
ECM Motor Option
Unit Wiring
ECM ELECTRICAL DATA
Unit Size Coil
Motor
hp
115V 208-230V
DVA04 All 1/3 3.2 2.2
DVA06 All
DVA08 All
DVA10 All 1/2 6.8 4.1
Motor FLA
1/3
1/3
4.3
4.3
3
3
Notes:
1. Motor is Genteq X-13 or equivalent.
2. Overload Protection: ECM motor is electroni-
cally protected.
3. Locked Rotor Amps: If motor speed decreas-
es below a programmed stall speed, the mo-
tor will shut down and after a delay period, the
control will attempt to restart the motor. Start-
ing current is limited to significantly less than
full load current.
4. Agency Listings for the motor: UL File:
E100625 Vol. 9 for Motor, Vol. 7 Sect. 14 for
Control; CSA File: LR80176