The information below is from the unit Power Wiring diagram, below that is a visual on changing the motor speed on an electromechanical Precedent unit.
To Increase/Decrease Voltage/RPMs (See IDM PRM Indication Table below):
- Push and hold the Set button for 3 sec. Board will display
Motor 1 parameter Name: HI 1. - Slow push Set again to display the parameter's current value =
7.50 Volts. - Push on + or - button to adjust parameter to desired value =
XXX Volts. - Push and hold Set button for 3 sec to "Save" the value. After save is complete
HI 1will show again. After the voltage
HI 1is successfully changed, the display sequence will be:- MTR 1 → XXX → MTR 2 → 0.00 → FST1 → ON → FST2 → ON/OFF → EhEn → ON/OFF
and the motor will ramp up or down to adjust to the input signal.
| IDM RPM INDICATION | |||||||
|---|---|---|---|---|---|---|---|
| RPM | VOLT | RPM | VOLT | RPM | VOLT | RPM | VOLT |
| N/A | 1.00 | 465 | 2.75 | 976 | 4.50 | 1425 | 6.25 |
| N/A | 1.25 | 544 | 3.00 | 1044 | 4.75 | 1475 | 6.50 |
| N/A | 1.50 | 630 | 3.25 | 1115 | 5.00 | 1533 | 6.75 |
| N/A | 1.75 | 716 | 3.50 | 1203 | 5.25 | 1581 | 7.00 |
| N/A | 2.00 | 775 | 3.75 | 1253 | 5.50 | 1615 | 7.25 |
| 325 | 2.25 | 845 | 4.00 | 1312 | 5.75 | 1615 | 7.50 |
| 402 | 2.50 | 912 | 4.25 | 1368 | 6.00 | ||
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.