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ManualsBrandsBelimo ManualsDampersSpring Return, Multi-Function Technology Valve Actuator, 24 VAC

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA

Multi-Function Technology

Operation

Motion Parameter Variables Description

New Generation AF

70 to 220 seconds Running time is selectable allowing for customizing the actuator for the

application at hand. Adjustable running time allows for:

• Matching HVAC system sequence of operation.

• Improving control loop stability.

• Reducing actuating noise (slower running).

• Retrofit applications

The running time is constant and independent of load.

New Generation NF

40 to 220 seconds

Running Time

AF / NF / LF / TF

75 to 300 seconds

AM*

90 to 350 seconds

NM*

45 to 150 seconds

AH*

75 to 150 seconds

LM*

35 to 150 seconds

LH*

75 to 150 seconds

Rotation

Direction of Rotation

Default or Reversed The direction of rotation can be "Direct" or "Reverse" acting of the control

signal. The direction of rotation is selected from a CW and CCW switch

located on the actuator.

An alternative method of changing the direction of rotation is to use the

PC-Tool software. This option allows you to make remote set-up corrections

without having the need to be at the actuator.

Selection of the direction of rotation is only possible via the PC-Tool

software or manually with the switch on the actuator. Selection via a preset

configuration is not an option.

Intermediate

Position

Control

(Override Control)

• Minimum Position (Default 0%)

• Intermediate Position (Default 50%)

• Maximum Position (Default 100%)

Intermediate Positions are achieved

through ‘forced override’ positions.

SEE FIGURE A – FORCED OVERRIDES.

All intermediate settings are adjustable from 0 to 100%. Programmed as

default, these control positions are possible by using the wiring diagram in

FIGURE A. The override functions can be used as a means to test the

actuator’s functionality during equipment servicing or troubleshooting.

Intermediate positions can also be integrated into the control circuit as a

part of the sequence of operation.

The Min, Mid, and Max positions can be used in any MFT control mode.

• VDC: For stand-alone controllers where a minimum position is needed.

• PWM: Eliminate add-on accessories.

• Floating Point: New functionality to a common application.

• On/Off: New functionality to a common application.

– Satisfy combustion air requirements or boiler sequencing with O/A damper.

– Eliminates secondary minimum position dampers.

* Quicker running actuators are available. Contact Belimo Customer Service for details.

FIGURE A – Forced Overrides