Installation Instructions

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Document No. 546-00333

December 8,

2011

Laboratory Room Single Duct Supply Air

Terminal

Item Number 546-00333, Rev. EA Page 1 of 8

Product Description

The laboratory room single duct supply air terminal

(LGS) is a one-piece Insul-Guard



lined laboratory

room airflow control device that provides cooling

only or optional cooling with hot water reheat air to a

room. This device consists of a duct section, a

damper blade mounted on a solid, stainless steel

damper shaft with Teflon

bearings, and a

Flo-Cross



sensor. There is a round duct inlet collar

and a rectangular slip and drive connection on the

discharge. The low leakage terminal is constructed

with 22-gauge galvanized steel.

Options

• Sizes 4", 6", 8", 10", 12", 14", 16", 18"

• Laboratory Room Controller (LRC) and

enclosure

• Room Pressurization Controller (RPC) and

enclosure

• Hot water reheat coils (one or two row)

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–Pnuematic (AO–P)

Transducers, No. 3 pneumatic actuator, and

one differential pressure transmitter

(optional). 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 sealant

• Four 1/2-inch ‘J’ bolts*

• 1/2-inch threaded rod*

• Hanger wire or hanger straps*

• Hanger brackets*

• 1-inch angle iron*

• 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

• Reheat coils and valves properly sized

(if reheat coils are used)

• Supply ductwork installed

• Water lines installed (if reheat coils are used)

• 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 (8 pages)

PAGE 1
Installation Instructions Document No. 546-00333 December 8, 2011 Laboratory Room Single Duct Supply Air Terminal Product Description The laboratory room single duct supply air terminal (LGS) is a one-piece Insul-Guard lined laboratory room airflow control device that provides cooling only or optional cooling with hot water reheat air to a room. This device consists of a duct section, a damper blade mounted on a solid, stainless steel ® damper shaft with Teflon bearings, and a  Flo-Cross sensor.
PAGE 2
Document No. 546-00333 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 Sensors, damper extension rod, or any controls. Terminal measurements and weights (with and without heating coils), and coil connection information is included in Figures 1 through 6, Table 1, and Table 2.
PAGE 3
Document No. 546-00333 Installation Instructions December 8, 2011 Figure 1. Single Duct Supply Terminal without Reheat. Figure 2. Single Duct Supply Terminal with Reheat and Controls Enclosure. Siemens Industry, Inc.
PAGE 4
Document No. 546-00333 Installation Instructions December 8, 2011 Figure 3. Single Duct Supply Terminal with Reheat, Controls Enclosure, and LRC. Table 2. 18-inch Single Duct Supply Terminal Dimensions. Duct Size Dimensions (See Figures 4, 5, and 6) Inches Outlet Side L 1. 2. 3. 4. 5.
PAGE 5
Document No. 546-00333 Installation Instructions December 8, 2011 Figure 4. 18-inch Single Duct (High Capacity) Supply Terminal. Figure 5. 18-inch Single Duct (High Capacity) Supply Terminal with Reheat. Siemens Industry, Inc.
PAGE 6
Document No. 546-00333 Installation Instructions December 8, 2011 Figure 6. 18-inch Single Duct (High Capacity) Supply Terminal with Reheat, Controls Enclosure, and LRC. 2. For angle iron hangers. Cut two pieces of angle iron 4 inches wider than the terminal (Figure 7) and mount the angle iron 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. 4. For hanger brackets.
PAGE 7
Document No. 546-00333 Installation Instructions December 8, 2011 6. For threaded rod. Using threaded rod suspended from the building’s bar joist or from mounting anchors properly secured to the building’s structure with lugs or poured-in-place hangers, secure the terminal and level it in each direction (See Figure 7 and Figure 8). Percussion nails are not adequate anchors. 7.
PAGE 8
Document No. 546-00333 Installation Instructions December 8, 2011 Figure 10. AO-P Transducer Wiring Connections. 2. Connect a two-conductor 20 AWG cable to the field panel’s 4 to 20 mA input or UC’s universal input. Connect it to the differential pressure transmitter or through the wiring bushing/knockout on the controls enclosure (Figure 9) to the differential pressure transmitter inside the enclosure. Connect the cable to the differential pressure transmitter (Figure 11). Figure 11.