AAON ASM02907 Motor Speed Controller
Ulwazi Lomkhiqizo
Imininingwane
- Product Name: Motor Speed Controller
- Voltage Izinketho: 240V kanye 480V
- Control Method: Phase control
- Motor Type Compatibility: Permanent split capacitor (PSC) or shaded pole
- Speed Modes: Low and High speed
- Control Power Inputs: 24 VAC
| ILOGU YOKUBUYEKEZA IGAMA LOMKHIQIZO | |
| UKUBUYEKEZWA NOSUKU | SHINTSHA |
| Rev. B, October 4, 2023 | Updated the logic power source in the 240V and 480V specification tables |
| Rev. A, September 16, 2021 | Okwangempela |
| IINGXENYE ZEINGXENYE ZEGAMA LOMKHIQIZO | |
| INGXENYE DESCRIPTION | INGXENYE NUMBER |
| Motor Speed Controller (240 V) | I-ASM02907 |
| Motor Speed Controller (480 V) | I-ASM02908 |
PHELILEVIEW
- The Motor Speed Controller is designed to control the speed of alternating current (AC) induction motors in combustion air blowers.
- The Motor Speed Controller is used with blower motors with Hall effect tachometer sensors included to help facilitate blower speed control.
Izici
There are two Motor Speed Controller options, the 240 V and the 480 V. Both controllers function the same, but are equipped with a different voltage power supply. See Figure 1, this page for details. The Motor Speed Controller controls speed based on the dip switch settings. The controller provides two speed modes, low and high speed. The two modes are controlled by 24 VAC control power inputs.
ISEXWAYISO: The controller uses a phase control method to adjust the voltage supplied to the motor. Confirm with the motor manufacturer that the motor being controlled is acceptable for this type of operation. Motor type must be permanent split capacitor (PSC) or shaded pole and be equipped with a one pulse per revolution Hall effect tachometer sensor.
Faka izilungiselelo zokushintsha
In Two Speed applications, the low speed is set by the sum of the rpm values for all switches that are in the open/off position. See Table 1, this page for dip switch settings.
| Dip Shintsha | RPM |
| 1 | 20 |
| 2 | 40 |
| 3 | 80 |
| 4 | 160 |
| 5 | 320 |
| 6 | 640 |
| 7 | 1280 |
| 8 | 2560 |
Ithebula 1: Dip Switch Settings
QAPHELA: If the dip switch setting is outside of the 1000- 3400 rpm range, it is invalid and the fan will run at 100%.
Faka izilungiselelo zokushintsha
Dip Switch Calculation
To determine the motor speed, calculate the sum of the values for all switches in the open/off position. For example, if switches 1 ,3 ,5, and 7 are open/off, the motor speed is 1700. See Figure 1, this page for details. 
Motor Speed Controller Dimensions
UKUFAKA KANYE NEZINKAMU
Izintambo
See Tables 2 and 3, this page for the Motor Speed Controller 240 V and 480 V specifications.
| Motor Speed Controller 240 V | |
| Ukucaciswa | Inani |
| Logic Power Source | 18-30 VAC@3VA |
| Motor Power Source | I-204-254 VAC |
| Imvamisa ye-AC yamandla | 59-61 Hz |
| Motor Current Rating | 4 A |
| Ukuhambisana Kwezimoto | Permanent Split Capacitor or Shaded Pole |
| Full Speed Startup Time | imizuzwana engu-15 |
| Izixhumanisi zamandla | 1/4” quick-connect tabs |
| Ukuxhumeka Kokufaka kwe-Analog | Terminal Block, 14 GA Max |
| Tach Sensor Connections | 3-pin 0.1” MTA Connector |
| Analog Control Range (2-10V) | 1000-3400 RPM |
| Izinga Lokushisa Lesitoreji | -40ºC to + 85 ºC |
| Izinga Lokushisa Lokusebenza | -40ºC to + 70 ºC |
| Ukuhlelwa kwe-UL | UL 60730-1,Automatic Electrical Controls |
Ithebula 2: Motor Speed Controller 240 V Specifications
ISEXWAYISO: Remove all power to the controller before making any connections or adjustments to avoid electrical shock or damage to the unit.
| Motor Speed Controller 480 V | |
| Ukucaciswa | Inani |
| Logic Power Source | 18-30 VAC@3VA |
| Motor Power Source | I-408-528 VAC |
| Imvamisa ye-AC yamandla | 59-61 Hz |
| Motor Current Rating | 4 A |
| Ukuhambisana Kwezimoto | Permanent Split Capacitor or Shaded Pole |
| Full Speed Startup Time | imizuzwana engu-15 |
| Izixhumanisi zamandla | 1/4” quick-connect tabs |
| Ukuxhumeka Kokufaka kwe-Analog | Terminal Block, 14 GA Max |
| Tach Sensor Connections | 3-pin 0.1” MTA Connector |
| Analog Control Range (2-10V) | 1000-3400 RPM |
| Izinga Lokushisa Lesitoreji | -40ºC to + 85 ºC |
| Izinga Lokushisa Lokusebenza | -40ºC to + 70 ºC |
| Ukuhlelwa kwe-UL | UL 60730-1,Automatic Electrical Controls |
Ithebula 3: Motor Speed Controller 480 V Specifications
Amandla Okulawula
There are three 1/4 inch quick-connect tabs for 24 VAC control power signal connections. The W1 terminal is 24 VAC common and ground. The W2 terminal is the high speed input, and terminal W3 is the low speed input. If W2 is supplied with 24 VAC power and W3 is unpowered, the motor is will run at full speed. If W2 and W3 receive power, or if W3 receives power while W2 is unpowered, the motor speed will be controlled to the analog input voltage or the dip switch setting.
Line and Motor Connections
The L1 and L2 quick-connect terminals should be connected to a 240 V or 480 V power supply. The M1 and M2 terminals should be connected to the motor.
Ukukhweza
The Motor Speed Controller has a factory mounted aluminum base plate. The metal base plate helps the controller regulate temperature and facilitate proper heat dissipation.
UKUFAKA KANYE NEZINKAMU
Two Speed Wiring
In Two Speed Mode, when 24 VAC power is applied only to terminal W2, the motor will operate at high speed. If 24 VAC power is applied to terminal W3 (instead of, or in addition to, terminal W2), the motor will operate at a speed determined by the dip switch setting. See Figure 4, this page for wiring details.
Okokufaka kanye Nemiphumela
I/O Imephu
See Table 4, this page for Motor Speed Controller inputs and outputs.
| Isilawuli sesivinini seMotor | |
| Okokufaka | |
| W1 | Ground (for 24 VAC control voltage) |
| J1 | Fan tachometer feedback |
| L1 | Ulayini voltage (240 VAC or 480 VAC) |
| L2 | Ulayini voltage (240 VAC or 480 VAC) |
| Okokufaka Kanambambili | |
| W2 | Fan high speed (24 VAC) |
| W3 | Fan low speed (24 VAC) |
| Okokufaka kwe-Analog | |
| I-TB1 | 2-10 VDC variable fan speed input |
| Imiphumela | |
| M1 | I-fan motor |
| M2 | I-fan motor |
Ithebula 4: Inputs and Outputs
UKULANDELANA KWEMISEBENZI
Izindlela Zokusebenza
Ukusebenza
The Motor Speed Controller is used to control the speed of PSC or shaded-pole fan motors. The binary inputs are used to switch between High and Low Speed Modes. In High Speed Mode, the fan operates at 100%. In Low Speed Mode, the fan is controlled by the rpm setpoint determined by the dip switch setting. Fan speed is provided to the controller by a Hall effect tachometer in the motor. If the fan speed is above or below setpoint, the voltage supplied to the fan will be decreased or increased to maintain the fan speed setpoint.
Imodi engekho
In Off Mode, there is no W2 or W3 input and the fan output is de-energized.
Imodi Yejubane Eliphezulu
In High Speed Mode, the W2 input is energized with 24 VAC power and the W3 input is de-energized. The fan runs at full speed. If the W2 and W3 inputs are both de-energized, the fan output will de-energize. If the W3 input is energized with 24 VAC power, the fan will switch to low speed.
Imodi Yejubane Eliphansi
- In Low Speed Mode, the fan will operate when the W3 input is energized or when the W2 and W3 inputs are energized with 24 VAC power.
- When the fan is powered on, it will run at high speed for 15 seconds before switching to low speed.
- The fan speed will be maintained at a speed determined by the dip switch settings.
- In Two Speed Mode, the fan rpms are labeled on the circuit board. The switch position should be set to OFF to add that position’s rpm value. For example, for 2560 rpm, positions 1-7 should be
set to ON and position 8 should be set to OFF. - If the W3 input is de-energized, the fan will switch to high speed operation.
- The fan output will de-energize if both W2 and W3 inputs are de-energized.
Motor Speed Controller Technical Guide G097900 · Rev. B · 231004
- AAON Controls Support: Support.Controls@aaon.com
- Izilawuli Ukusekela Webindawo: www.aaon.com/aaon-controls-technical-support
- AAON Usekelo Lwezobuchwepheshe Lwemboni: Technical.Support@aaon.com
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2425 South Yukon Ave • Tulsa, OK • 74107-2728
Ph: 918-583-2266 • Ifeksi: 918-583-6094
AAON P/N: G097900, Rev. B
Printed in the USA • Copyright October 2023 • All Rights Reserved
FAQ
Athini ama-voltage options for the Motor Speed Controller?
The Motor Speed Controller is available in 240V and 480V options.
Amadokhumenti / Izinsiza
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AAON ASM02907 Motor Speed Controller [pdf] Umhlahlandlela Womsebenzisi ASM02907, ASM02908, ASM02907 Motor Speed Controller, ASM02907, Motor Speed Controller, Speed Controller, Controller |