Installation Instructions

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Document No. 546-00092

August 10, 2011

Laboratory Electronic Actuator Assembly

Item No. 546-00092(HA) Page 1 of 6

Product Description

The Lab Electronic Actuator (Figure 1) is a compact,

high-speed actuator designed for modulating and

floating control of dampers or air valves. The

complete actuator consists of three parts: the Lab

Electronic Actuator, Mounting Bracket kits (90° OR

45°/60° rotation) and Interface Board.

Figure 1. Electric Actuator

The LEA Interface Board (also known as the Analog

Output-Electronic, AO-E board) powers and controls

motion the Actuator based on input signals. The

interface board supports floating (digital) 24VAC

pulses or analog 0-10vdc, and analog 4-20mA input

signals. Capacitors on the Interface Board provide

power for fail-safe positioning. Through the Interface

board, the actuator can be connected to the Fume

Hood Controller (FHC), Lab Room Controller (LRC)

or other DDC controllers with VAV lab applications

requiring high-speed actuator positioning.

Figure 2. LEA Interface Board.

WARNING:

Venturi Air Valves and Terminal Boxes (blade

dampers), all sizes draw 25 VA maximum per

LEA Interface board.

NOTE:

A three-wire power trunk must be run from the

transformer to the LEA Interface board for the

electronic actuator. The ‘E’ connection of

terminal block J1 must be connected to

ground.

The Lab Electronic Actuator Assembly (Figure 3)

includes the interface board, the actuator and the

90° Rotation Mounting Bracket kit installed in a

galvanized steel enclosure. The LEA enclosed

assembly can be field or factory mounted over the

bare shaft of any supply or exhaust terminal. When

mounting on terminals with their own device

enclosures, provide the three components and not

the Assembly. Be careful to select the mounting kit

that matches the terminal’s rotation.

Figure 3. Electronic Actuator Assembly for Terminal

Units.

Summary of content (6 pages)

PAGE 1
Installation Instructions Document No. 546-00092 August 10, 2011 Laboratory Electronic Actuator Assembly Product Description The Lab Electronic Actuator (Figure 1) is a compact, high-speed actuator designed for modulating and floating control of dampers or air valves. The complete actuator consists of three parts: the Lab Electronic Actuator, Mounting Bracket kits (90° OR 45°/60° rotation) and Interface Board. Figure 1.
PAGE 2
Document No. 546-00092 Installation Instructions August 10, 2011 Product Numbers Mounting 546-00437B Lab Electronic Actuator -Analog/Floating Actuator Only, w/o brackets or Interface. LEA Interface board LEA Bracket Kit for 90° LEA Bracket Kit for 45° and 60° rotation 1. If the Electronic Actuator Assembly has already been manufacturer installed on the Terminal Unit or this is a Venturi Air Valve installation, skip to Section 3– Floating Control (Digital) Applications.
PAGE 3
Document No. 546-00092 Installation Instructions August 10, 2011 8. To change to an opposite full open/closed position with actuator retracted, loosen the crank arm bolt from the damper shaft. Reposition the damper to the full closed or open position, and tighten the crank arm bolt using the open-end wrench. Verify that the crank arm bolt is firmly tightened to prevent slippage of the damper shaft. NOTE: The linkage is designed for 1/2-inch to 3/4inch shafts.
PAGE 4
Document No. 546-00092 Installation Instructions August 10, 2011 NOTE: Switch SW1 is not used for Floating Control (Digital) Applications. 3. Perform the steps in the Section 5 – Functional Verification. 4. Replace the cover on the enclosure and tighten the butterfly screws. Installation for a floating control (digital) application is complete. 3. Perform the steps in the Section 5 – Functional Verification. 4. Replace the cover on the enclosure and tighten the butterfly screws.
PAGE 5
Document No. 546-00092 Installation Instructions August 10, 2011 Table 1. Switch Settings.
PAGE 6
Document No. 546-00092 Installation Instructions August 10, 2011 12. Install the AC power to the unit (J1). Replacement Instructions Electronic Actuator – Terminal Unit Installation 13. Perform the steps in the Section 5 – Functional Verification before using the LEA Interface/electronic actuator assembly. 1. Remove the cover on the enclosure. 2. Remove the AC power to the unit (J1). 14. Replace the cover on the LEA Interface/Actuator enclosure. Installation of the replacement actuator is complete.