Acme Engineering EC-S Installation Manual
Read and Save These Instructions
Form 613084A
INSTALLATION & MAINTENANCE INSTRUCTIONS
EC Motor Wiring Diagrams
This publication applies to Acme fan models shipped with the EC Motor (Electronically Commutated Motor)
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install, operate or maintain
the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in
personal injury and/or property damage!
This section applies only to EC Motor Part Numbers 921728, 921733, 921735, 921736, 922711, 922712, 922713, and 923250
Potentiometer Dial Only*- (See Figure 1) Motor features a potentiometer dial located on the side of the motor allowing the user to make
necessary speed adjustments with a small at tip screw driver. The 3 control wires are not used. The motor can also be controlled by
a separate 0-10 VDC and 24 VAC to the control wires, in this set up the potentiometer dial needs to be set to full speed (CW).
Optional Speed Controller (See Figure 2)
Remote Speed Controller Single Speed (Optional)*- (See Figure 2-A) Set the potentiometer dial located on the side of the motor to
full clockwise. When selected with this option the fan will come with a 24 VAC transformer mounted for the purpose of powering the
logic circuits in both the motor and the remote speed controller. The remote speed control will supply a DC signal that varies from 0 to
10V. This signal will vary the motors speed. The motor will shut off between 0-1.9v.
Mounted Speed Controller Two Speed (Optional)*- (See Figure 2-B) Set the potentiometer dial located on the side of the motor to full
clockwise. When selected with this option the fan will come with a 24 VAC transformer mounted for the purpose of powering the logic
circuits in both the motor and the dual speed controllers mounted on fan. The supplied toggle switch will select the Low (LO) or High
(HI) speed on the speed controllers based on the dial settings. The motor will shut off between 0-1.9v.
Customer Building Controller - (See gure 2-C) Set potentiometer dial located on motor side to full clockwise. Connect Red (010VDC) and White (Common) to building controller. Motor requires factory mounted 24VAC transformer to run motor logic boards. The
motor shuts off between 0-1.9V.
* All 115, 208 or 230V connections will be made in the supplied junction box. Wire to the remote speed control is to be supplied by
others and must meet all applicable codes.
NOTE: When using a remote variable speed control the potentiometer on the motor (if present) should be set to full clockwise.
The remote speed control location is limited by a maximum wire length of 100 feet. Up to 6 fans can be operated from one remote
control. Only one transformer should be used.
FAN MOTOR
MCMILLIAN
EC MOTOR
115 VAC,
208 VAC, OR
230 VAC
POWER INPUT
LINE
115, 208, OR
230 VAC
POTENTIOMETER DIAL ONLY (FIGURE 1)
SET POTENTIOMETER FOR
SPEED CONTROL
ISOLATED
CONTROL INPUT
WHT - L1
BLK - L2
GREEN - GROUND
WHT L1
BLK L2
GREEN - GROUND
SAFETY
DISCONNECT
SWITCH
RED - 1-10 VDC
WHITE - COMMON
BLACK - 24 VAC
0-10 VDC OUTPUT
POWER INPUT
LINE
MCMILLIAN
EC MOTOR
115 VAC,
208 VAC, OR
FAN MOTOR
115, 208, OR
230 VAC
MOTOR SPEED CONTROL
SINGLE SPEED CONTROL ACCESSORY
REMOTE CONTROL
MAY BE MOUNTED UP TO 100 FT FROM FAN
RED - 1-10 VDC
WHITE - COMMON
BLACK - 24 VAC
FIGURE 2-A
LO
BLACK - LO
BLACK - 24 VAC
SHIPPED MOUNTED IN FAN
MAY BE MOVED UP TO 100 FT FROM FAN
DUAL SPEED CONTROL
WHITE - HI
WHITE - COMMON
RED - 1-10 VDC
FIGURE 2-B
HI
REMOTE SPEED SWITCH
MAY BE MOUNTED UP TO 100
WHITE - COMMON
BLACK - 24 VAC
WHITE - COMMON
BLACK - 24 VAC
OFF
LO
HI
FT FROM FAN
WHITE - HI
BLACK - LO
RED - 1-10 VDC
1 2 3
Note: If pin numbers are missing or worn off
orient speed controller as shown (single speed
controller shown 2 speed control same as single
speed.)
OPTIONAL EC MOTOR CONTROLS (FIGURE 2)
FIGURE 2-B DUAL SPEED
FIGURE 2-A SINGLE SPEED
FIGURE 2-C BUILDING CONTROL (BY OTHERS)
REMOTE CONTROL
0 - 10 VDC SUPPLIED
FROM BUILDING CONTROL
COMPUTER
0-10 VDC INPUT FROM
ENVIROMENTAL
COMPUTER
INSULATE THE 24 VAC
RED - 1-10 VDC
WHITE - COMMON
BLACK - 24 VAC
FIGURE 2-C
LINE
RED - 1-10 VDC
WHITE - COMMON
BLACK - 24 VAC
CONTROL INPUT
SET POTENTIOMETER TO
FULL SPEED (FULL CW)
ISOLATED
WIRE
ORG 230 VAC
BRN 277 VAC
CONNECT TO LINE
CORRESPONDING TO
MOTOR VOLTAGE AND
INSULATE THE REST
WHT - L1
BLK - L2
GREEN - GROUND
NUT
YEL
YEL/WHT
WHT 115 VAC
WHT 115 VAC
BLK COMMON
RED 208 VAC
GREEN - GROUND
WHT L1
BLK L2
SAFETY
SWITCH
DISCONNECT
WHT L1
BLK L2
GREEN - GROUND
24 VAC OUTPUT
115, 208, OR 230 VAC
INPUT
TRANSFORMER
2
230 VAC
2
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