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electrical Connections
Low Voltage Signal Connections
- Variable Torque Speed Control Option
The Evergreen CM can be controlled in a Variable Speed Torque control
mode using a PWM (Pulse Width Modulation) control on terminals (C) and
(1). The motor will operate from 10% to 100% of output depending on the
input from the ECM PWM speed controller.
A PWM control suitable for ECM motors must meet the following
specifications:
-
15-23 VDC at 67-93Hz or 127-199Hz
-
10% Guaranteed On and 5% Guaranteed Off Duty Cycle
1. Using a 1/4” Female Quick Connect Terminal and 22-18 AWG wire,
connect the (C) Common terminal on the motor to the common on the
PWM controller.
2. Using a 1/4” Female Quick Connect Terminal and 22-18 AWG wire,
connect terminal (1) on the motor to the PWM signal on the PWM con-
troller. Terminal (1) is setup for AUTOSWITCH. If a PWM signal is present, the
motor will switch from Discrete Speed outputs to Variable output torque
based on the PWM Duty Cycle.
DO NOT connect the Low Voltage SIGNAL (speed) connections to the
existing PSC motor connections on the HVAC system. Any voltage above
23VDC connected to these terminals will cause permanent damage to
the motor.
EvergreenCM ManPROOF 100713_Fnl.indd 9
7/2/14 9:15 AM
