Onicon System-30 MODBUS BTU Manual do Utilizador descarregar pdf (Página 10)

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System-30 BTU Measurement System MODBUS RTU RS485 04/14 - 0583-1 / 18345 Page 10

3.2 MECHANICAL INSTALLATION

3.2.1 Main Unit Installation

SYSTEM-30 BTU MEASUREMENT SYSTEM WITH INTEGRAL

FLOW METER & TEMPERATURE SENSORS

0333-2

INCORPORATED

ISOLATION VALVE

Normally Open

ISOLATION VALVE

Normally Open

BYPASS VALVE

Normally Closed

20"

CHILLED WATER

SUPPLY

Y Strainer Upstream

Of Flow Meter

CHILLED WATER

RETURN

CONTROL SYSTEM

BACnet MS/TP

NETWORK

24 VAC POWER

FAN COIL UNIT

AIR HANDLING UNIT

1500 North Belcher Road, Clearwater, FL 33765 • Tel (727) 447-6140 • Fax (727) 442-5699

www.onicon.com • [email protected]

01-13-09

RETURN TEMP

FLOW

DIAGNOSTIC

LED’S

CONTROL SYSTEM

MODBUS RTU

NETWORK

24V AC/DC

CAUTION

Before you attempt to use the BTU measurement system, isolate the main unit, open the bypass

and ush the entire system so that it is free of ux, solder, pipe and tube cuttings and any other

free moving particles.

Installing the meter body

1. Make sure the unions are free of nicks or scratches on either end of the ow

meter body and on the process connections.

2. Spray the union faces with a silicone spray or apply a thin coat of beeswax to enhance

seating. Do not use paste thread sealant on union faces.

3. Orient the ow arrow on the meter with the direction of ow.

4. Recommended torques for union seal: 70 ft/lbs minimum

5. Make sure alignment of pipe does not put lateral stress on either joint.

Process

Connection

Process

Connection

Unions

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 45 46

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