Installation Instructions

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Document No. 546-00334

December 8, 2011

Laboratory Room Dual Duct Supply Air

Terminal

Item Number 546-00334, Rev. EA Page 1 of 5

Product Description

The laboratory room dual duct supply terminal (LGD)

is a one-piece insulated and Insul-Guard



lined

laboratory room airflow control device that provides

heating and cooling through two supply ducts. The

terminal consists of a duct section, three damper

blades, and a Flo-Cross



Sensor. There are two

round duct inlet collars and a slip and drive

connection on the discharge. The low-leakage

terminal is constructed with 22-gauge galvanized

steel only.

Options

• Sizes 4", 5", 6", 7", 8", 10", 12", 14", 16"

• Laboratory Room Controller (LRC) and

enclosure

Electronic Actuation

• Control packages including an Electronic

Actuator assembly with mounting bracket,

and a differential pressure transmitter

(optional). These parts are included in an

enclosure that is factory-mounted to the

outside of the terminal.

Pneumatic Actuation

• Control packages including one or all of the

following: Analog Output–Pneumatic (AO–P)

Transducers, No. 3 pneumatic actuator, and

one differential pressure transmitter. These

parts can be included in an optional

enclosure that is factory-mounted to the

outside of the terminal.

Product Numbers

Contact your Siemens Industry, Inc. representative

for detailed parts information.

Warning Notation

WARNING

Personal injury/loss of life may

occur if you do not follow a

procedure as specified.

Required Tools

• Small flat-blade screwdriver

• 3/8-inch open end wrench

• Needle nose pliers

• Duct tape

• Sealant

• Four 1/2-inch ‘J’ bolts*

• 1/2-inch threaded rod*

• Hanger wire or hanger straps*

• Hanger brackets*

• Angle iron 1-inch*

• Sheet metal screws

• 1/4-inch poly tubing

*Needed for suggested installation.

Expected Installation Time

30 minutes

Prerequisites

• Terminal ductwork free of debris

• Construction filters in place

• Supply ductwork installed

• Air lines installed (pneumatic applications)

NOTE: Terminals should be located so that they do

not come in contact with rigid conduit,

sprinkler piping, Greenfield metal covering,

or rigid pneumatic tubing. Do not install

terminals tight against concrete slabs or

columns because vibrations are amplified

through these structures. Also, allow

clearance for service access to controls.

Summary of content (5 pages)

PAGE 1
Installation Instructions Document No. 546-00334 December 8, 2011 Laboratory Room Dual Duct Supply Air Terminal Product Description The laboratory room dual duct supply terminal (LGD) is a one-piece insulated and Insul-Guard lined laboratory room airflow control device that provides heating and cooling through two supply ducts. The terminal consists of a duct section, three damper blades, and a Flo-Cross Sensor. There are two round duct inlet collars and a slip and drive connection on the discharge.
PAGE 2
Document No. 546-00334 Installation Instructions December 8, 2011 Instructions 1. Move the terminal to the installation area. Remove the terminal from the shipping package. Do not handle the Flo-Cross Sensor, damper extension rod, or any controls. Terminal measurements and weights are included in Figure 1, Figure 2, and Table 1. Installation instructions for the LGDs are presented in the following two sections: − Section 1 applies to mounting the terminal unit. − Section 2 applies to actuation.
PAGE 3
Document No. 546-00334 Installation Instructions December 8, 2011 Figure 1. Dual Duct Supply Air Terminal with Controls Enclosure. Figure 2. Dual Duct Supply Air Terminal with Controls Enclosure and LRC. Siemens Industry, Inc.
PAGE 4
Document No. 546-00334 Installation Instructions December 8, 2011 2. For angle iron hangers. Cut two pieces of angle iron 4 inches wider than the terminal box (Figure 3) and mount them to the bottom of the terminal using sheet metal screws. Mount the angle iron so that it does not interfere with internal parts or the access panel. Figure 4. Hanger Bracket Installation. 7.
PAGE 5
Document No. 546-00334 Installation Instructions December 8, 2011 Wiring Connections Several electrical connections must be made from the field panel, or UC to the terminal to operate the AO–P Transducers and the differential pressure transmitter. NOTE: The AO–P Transducer used in these steps is P/N 545-113. 1. Connect a two-conductor 20 AWG cable to the field panel’s 0 to 10V output or UC’s universal output.