Installation Instructions

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Document No. 546-14401

February 27, 2004

LRC Electronic VAV/CV with HW Reheat and Slow

Actuation Venturi Supply and Exhaust — Analog Output

546-14401, Rev. 010 Page 1 of 7

Product Description

This Laboratory Room Controller (LRC) provides

Direct Digital Control (DDC) of a laboratory room

with one supply duct, one exhaust duct, and up to

four sources of external exhaust. It features VAV or

CV airflow control, slow actuation of venturi air

valves via 0 to 10V AOs, and hot water reheat. It can

operate stand-alone, networked, or with a field

panel. If CE compliance is desired, a ferrite filter and

an alternate room temperature sensor cable must be

used (see Product Numbers).

This LRC can be ordered with or without Air Velocity

Sensor (AVS) transducers mounted on the board. If

ordered without AVS transducers mounted on the

board, two Remote Air Modules (RAM) are required.

Shipping carton contains a controller assembly

(controller board and cover), a mounting rail, and

two self-tapping screws.

NOTE: Keep the controller in its static-proof bag

until installation.

Product Numbers

Product Description

550-264B

LRC with HW Reheat and Slow Actuation

Venturi Supply and Exhaust—onboard AVS

550-767A

LRC with HW Reheat and Slow Actuation

Venturi Supply and Exhaust—offboard AVS

(requires two Remote Air Modules)

550-818A

Remote Air Module (two required—ordered

and shipped separately)

The LRC is designed to work with GDE 161.1P electric

actuators (order separately).

Parts for CE Compliance

588-100A 25 ft (7.6 m)

588-100B 50 ft (15.2 m)

588-100C

2-RJ11 room sensor

cable with alternate

twisted pairing

100 ft (30.48 m)

550-705 clamp-on ferrite filter 10 pack

Installation Conventions

CAUTION

Equipment damage or loss of

data may occur if user does not

follow procedure as specified.

Required Tools

• Electro-Static Discharge (ESD) wrist strap

• Small and medium flat-blade screwdrivers

• Electric drill

• 1/4-inch (6.35 mm) hex nut bit

Additional tools if not using self-tapping option:

• 1/4-inch nut driver

• 1/8-inch (3 mm) bit

Prerequisites

• Wiring conforms to NEC and local codes

and regulations.

• Floor level network (FLN) with 24-volt wiring.

• Supply power to the unit OFF.

• Any necessary hardware installed: terminal

unit, actuator(s), sensor(s), etc.

• Room Temperature Sensor (RTS) installed

(optional). Note: a low-cost temporary RTS

(P/N 540-658P25) is available that plugs into

the RTS port on the LRC, providing

temperature input and actual space control

until a permanent RTS is installed.

Expected Installation Time

New controller installation 10 min.

Replacement with removable

terminal blocks

6 min.

Replacement without removable

terminal blocks

16 min.

NOTE: You may require additional time for

database work at the field panel.

Summary of content (7 pages)

PAGE 1
Installation Instructions Document No. 546-14401 February 27, 2004 LRC Electronic VAV/CV with HW Reheat and Slow Actuation Venturi Supply and Exhaust — Analog Output Product Description This Laboratory Room Controller (LRC) provides Direct Digital Control (DDC) of a laboratory room with one supply duct, one exhaust duct, and up to four sources of external exhaust. It features VAV or CV airflow control, slow actuation of venturi air valves via 0 to 10V AOs, and hot water reheat.
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Document No.
PAGE 3
Document No. 546-14401 Installation Instructions February, 2004 Installation Instructions NOTE: 1. Follow all safety regulations and local codes when installing this equipment. Using the mounting rail as a template (Figure 1 or Figure 2), mark the screw holes where you will install the LRC. 2. Do one of the following: • If using self-tapping screws, fasten the mounting rail using a drill and hex nut bit.
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Document No. 546-14401 Installation Instructions February, 2004 #8 TAPPING SCREW HOLE 11/64 (4) DIA. CLEARANCE 4-1/8 (105) C L + - S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3/16 (5) + - S + - S 1-27/32 (47) 10-29/32 (277) TEC0462R1 11-9/32 (287) DIMENSIONS IN INCHES MILLIMETERS IN PARENTHESES Figure 5. Dimensions for LRC Electronic with HW Reheat and Slow Actuation Venturi Supply and Exhaust. (Offboard AVS) #8 TAPPING SCREW HOLE 11/64 (4) DIA.
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Document No. 546-14401 Installation Instructions February, 2004 Wiring Diagrams CAUTION: The LRC DOs control 24 Vac loads only. The maximum rating is 12 VA for each DO. Use an interposing 220V 4-relay module (540-147) for any of the following: VA requirements higher than the maximum; 110 or 220 Vac requirements; DC power requirements; separate transformers used to power the load. NOTE: Consult with the local representative if terminations are missing or are different.
PAGE 6
Document No. 546-14401 Installation Instructions February, 2004 CAUTION: The LRC DOs control 24 Vac loads only. The maximum rating is 12 VA for each DO. Use an interposing 220V relay module (P/N 550-054) for VA requirements higher than the maximum, 110 or 220 Vac requirements, DC power requirements, or whenever a separate transformer is used to power the load. Consult with the local representative if terminations are missing or are different.
PAGE 7
Document No. 546-14401 Installation Instructions February, 2004 ANALOG INPUT TERMINATIONS - CAUTION: 24 VDC POWER SUPPLY + - + 4-20 mA SENSOR TEC0429R1 A SEPARATE power supply is required if a 4-20 mA sensor is used. Failure to follow wiring precautions will result in equipment damage. ENTIRE CIRCUIT MUST BE ISOLATED WITH NO EARTH GROUND, INCLUDING THE 4-20 mA SENSOR NOTE: Each 4-20mA sensor requires a SEPARATE, dedicated 24 VDC power supply.