Greenheck Vari-Green Motor User Manual

Document 473681

Vari-Green® Motor and Controls

Installation, Operation and Maintenance Manual

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!

Table of Contents

Reference part number listed in chart to locate speciﬁc motor information page number.

RPM

HP Voltage

1/6 115 300-1725 TENV

1/6 208-240 300-1725 TENV 1.6 Pot/0-10V

1/4 115 300-1725 ODP

115/

1/4

208-240

1/4 208-240 300-1725 ODP 2.3 Pot/0-10V

1/2 115 300-1725 ODP

115/

1/2

208-240

1/2 208-240 300-1725 ODP 4.2 Pot/0-10V 313235 3

1/2 115 300-2500 ODP

3/4 115 300-1725 ODP

115/

3/4

208-240

3/4 208-240 300-1725 ODP 6.6 Pot/0-10V 314534 3

3/4 115 300-2200 ODP

1 115 300-1725 ODP 12.4 Pot/0-10V

115/

208-240

115/

208-240

1 208-240 300-1725 ODP 8.6 Pot/0-10V 314945 3

2 208-240 300 - 1725 TEFC 12.0 Pot/0-10V 310420 4

Actual maximum RPM may vary. See RPM column in chart on

Range

300-1725 ODP 3.3/1.8 Pot/0-10V 310175 6

300-1725 ODP 6.8/3.5 Pot/0-10V 310176 6

300-1725 ODP 9.0/4.9 Pot/0-10V 310177 6

300-1725 ODP 11.4/6.3 Pot/0-10V 310178 6

300-1725 TEFC 12.0/6.0 Pot/0-10V 311156 4

Encl. FLA

10.1 0-10V Only 309026

10.1 Pot Only 309029

10.6 Pot/0-10V

11.3 0-10V Only 310306

11.3 Pot Only 310475

11.3 Pot/0-10V 312361 3

Control Method

3.1 0-10V Only 311352

3.1 Pot Only 311353

3.4 Pot/0-10V

3.9 0-10V Only 310107

3.9 Pot Only 310108

3.7 Pot/0-10V

6.2 0-10V Only 309025

6.2 Pot Only 309028

6.7 Pot/0-10V 311812 3

6.5 0-10V Only 310307

6.5 Pot Only 310476

6.5 Pot/0-10V 312360 3

pg.10 for speciﬁc motor and fan combinations.

Motor

Part No.

311731

313712

313233

313713

311377

313714

313234

313715

311388

312619

310359

312362

Pg.

3312359

Controls .................................7-9

Maximum RPM Table ....................... 10

Vari-Green® Motor

The Vari-Green Motor is an electronically commutated (EC) motor that uses AC input power and internally converts it to a DC power supply which provides an 80% turndown capability and increased energy savings.

NOTE

When using a clamp meter to measure input amp draw, the meter must be capable of reading a non-linear current. Erroneous readings will occur otherwise.

WARNING

To reduce the risk of fire or electric shock, do not use this motor with any solid-state speed control device.

Vari-Green Motor and Controls

Features, Operation, Wiring and Troubleshooting

Features

Soft start – All motors feature soft-start technology which eliminates inrush current at startup. The motors will reliably start at any speed setting.

Overload protection – If the motor becomes overloaded, it will automatically reduce its speed until it is no longer overloaded. This means that the motor will never operate in the “service factor” which is possible with many AC motors.

Locked rotor protection – If the motor ever encounters a locked-rotor scenario, the motor will automatically shut itself down. It will try to restart up to 3 times, and if after the 3rd time the motor will still not rotate, the motor will not attempt to start again until power is cycled.

Thermal protection – The motors have a one-shot fuse thermal protector. This is meant to protect the motor from a severe temperature rise. Additionally, the motors have on-board temperature sensors which will reduce the speed of the motor should it become too hot. The fuse is used as a last resort to prevent a ﬁre.

RPM measurement – The motors have a small shaft extension on the end of the motor to measure motor RPM with either a contact or optical tachometer.

Operation and Wiring

Potentiometer Dial Only

Part Numbers Covered in this Section

309028 309029 310108 310475 310476 311353

These motors feature a potentiometer dial on the motor for speed adjustment. A small screwdriver can be used to make the speed adjustment. To increase the speed, rotate the dial clockwise. To decrease the speed, rotate the dial counter clockwise.

The motor is pre-wired at the factory and cannot be changed inside the motor. Connect single-phase power at the voltage listed on the nameplate.

These motors cannot be converted to receive a remote control signal – a different motor is needed. Please consult the factory.

Operation and Wiring

- 0-10V Input Only

Part Numbers Covered in this Section

309025 309026 310107 310306 310307 311352

These motors will accept a 0-10 VDC control signal for speed control. From 0-1.9V, the motor will be off, and will operate in the 2-10V range. 24 VAC/DC power is also required for operation. The motor will consume

0.7VA at 24 VAC or 25mA at 24 VDC. A factory mounted transformer is available to supply this voltage. See Fig. 1

The motor is pre-wired at the factory and cannot be changed inside the motor. Connect single-phase power at the voltage listed on the nameplate, along with the 0-10 VDC and 24V signal for speed control.

NOTE: The motor will not operate without the proper control voltages.

Fig. 1 0-10 VDC External connection with factory mounted transformer

Transformer Assembly

100 ft. or less

White

Black

Red

COM

24V

0-10V

COM

24V

0-10V

N.C.

COM.

N.O.

TO REMOTE DEVICE

PROVICED BY

OTHERS

Low voltage, route away

from high voltage lines

and/or use shielded cable

Vari-Green Motor and Controls

Factory Wiring

Field Wiring

Auxiliary

Contact

Trip Point = 1.85VDC Contact Rating: 10A @ 24-240VAC 5A @ 30VDC

Control

TRANSFORMER

to match motor name plate

Motor

115/230 VAC input

Green indiator light —Power present

2 x 4

Junction

Box

Operation and Wiring

- Potentiometer Dial and 0-10V Input

Part Numbers Covered in this Section

310359 311731 311377 311388 311812 312359 312360 312361 312362 312619 313233 313234 313235 313712 313713 313714 313715 314534 314945

These motors have both a potentiometer dial on the motor for speed adjustment AND have the ability to accept a 0-10 VDC signal for remote speed control.

There is a 4 second delay between the application of power and the motor starting.

The motor is pre-wired at the factory and cannot be changed inside the motor. Connect single-phase power at the voltage listed on the nameplate. If remote control is desired, connect the 0-10 VDC and 24V signal for remote speed control.

Dial on motor – A small screwdriver can be used to make the speed adjustment. To increase the speed, rotate the dial clockwise. To decrease the speed, rotate the dial counter clockwise. There is no need to connect the control wires.

0-10 VDC signal – The dial on the motor must be rotated fully clockwise to achieve the full speed range. If this is not done, the dial will act as a maximum speed limiter.

From 0-1.9V, the motor will be off, and will operate in the 2-10V range. 24 VAC/DC power is also required for operation. The motor will consume 0.7VA at 24 VAC or 25mA at 24 VDC. A factory mounted transformer is available to supply this voltage. See Fig. 1

A low voltage wiring harness is needed to supply the 0-10V signal to the motor. This harness is available from the factory if conversion is necessary.

Low Voltage Harness Part Numbers

Type Use with Motor 18 in. long 36 in. long

3-pin 311731, 310359 384431 384432

312359, 311377, 311812, 311388, 312360, 312361, 312362, 312619,

9-pin

313233, 313234,

384804 384805 313235, 313712, 313713, 313714, 313715, 314534, 314945

NOTE

The 9-pin connector on the motor contains 6 wires. The red, black and white wires are used for the external control signal and the other three are used for factory initialization and programing.

0-10V Analog input connection

Red + 0-10 VDC

White Common*

Black +24 VAC/DC

* Common is shared between both 24V power

and 0-10V signal.

The impedance of 0-10V circuit is 12KΩ

Troubleshooting

Motor does not operate

1. Check all wiring connections to ensure they are correct and secure.

2. Verify that all voltages are present at the motor, including 24V and 0-10 VDC, if applicable.

3. Make sure that the fan wheel will rotate freely and there are no foreign objects in the wheel. If fan wheel does not rotate freely, disconnect power from the motor and adjust the wheel or housing until the wheel can freely rotate. Apply power and the motor should restart.

4. If motor has both the dial on the motor and 0-10VDC control option, control wiring issues can be tested by disconnecting the control wires from the motor. The motor should then operate using the dial on the motor for speed control.

Motor will not reach maximum speed

1. Make sure dial is rotated full clockwise, if applicable.

2. Make sure motor is receiving 10 VDC, if applicable.

3. There are some motor/fan combinations where the motor may not reach nameplate RPM. See Max RPM table on page 10 for the maximum motor speed for your application.

Factory Mounted Transformer (Fig. 1)

A factory mounted transformer is available to supply 24 VDC power to the motor when the 0-10V signal is by others. This transformer has the capability to power a remote device if desired. The power available to a remote device is 400mA at 24 VDC. If the remote device is powered by a different source, connect the analog output to the 0-10V and COM terminals of the transformer. This will pass the signal through to the motor.

WARNING

Do not connect an external 24V supply to the transformer's control terminal labeled 24V. If the external device providing the 0-10V signal is powered elsewhere, this terminal can remain unused.

Vari-Green Motor and Controls

Part Numbers Covered in this Section

310420 311156

0-10V Analog input connection

Red + 0-10 VDC

White Ground

Features

Speed control These motors can be controlled by either a dial on the motor or a 0-10 VDC signal for remote control.

Soft start – All motors feature soft-start technology which eliminates inrush current at start-up. The motors will reliably start at any speed setting. There will be up to a 30 second delay between the application of power and the motor starting. The motor will "rock" back and forth upon startup as part of its normal operation.

Overload protection – If the motor becomes overloaded, it will automatically shut itself down. The maximum programed motor speeds have been selected to prevent this from happening in normal operation.

Locked rotor protection – If the motor encounters a locked-rotor scenario, it will automatically shut itself down. It will try to restart up to 3 times, and if after the 3rd time the motor will still not rotate, the motor will not attempt to start again until power is cycled.

Thermal protection – The motors have an automatic reset thermal protector. This is meant to protect the motor from a severe temperature rise.

RPM measurement – The motor RPM can be measured by removing the cooling fan cover and using a contact or optical tachometer. Be sure to replace the cooling fan cover when ﬁnished.

Reversible rotation – The motor direction has been pre-set at the factory for the rotation of the fan but can be reversed if necessary.

Operation and Wiring

These motors can be controlled by either a dial on the motor or a 0-10 VDC signal for remote control. The motor will be supplied from the factory with the correct accessory depending on what was ordered.

Dial on Motor - Turn the dial with your ﬁngers to adjust. To increase the speed, rotate the dial clockwise. To decrease the speed, rotate the dial counter clockwise. Turning the dial full CCW will turn the motor off.

0-10 VDC Signal - From 0-1.9V, the motor will be off, and will operate in the 2-10V range. This motor does not require 24V power for operation.

Wiring

1. All high and low voltage wiring connections are made inside the motor control box at the factory. Normally, there is no reason to enter the control box of the motor. If there is a need to enter the control box, disconnect power and wait at least ﬁve minutes to allow the capacitors to discharge.

2. The motors are factory wired for the ordered voltage. If the factory wired voltage does not match the desired voltage, the voltage can be changed, with exception of the 2HP motor (310420), which is 208-240V only.

115V: Connect 115 VAC to L1, connect Neutral to N. The L2 terminal remains empty. Connect ground to grounding stud.

115V Connection inside control box

208-240V - Connect Line voltage to L1 and L2. The N terminal remains empty. Connect the ground to the grounding stud.

208-240V Connection inside control box

Vari-Green Motor and Controls

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