Wiring

• Control Wiring – Multi strand , Annealed tin copper ,with sheath and

PVC insulation

• Power Wiring – Multistrand Copper conductor with PVC insulation

• Communication wiring – Multistrand , sheathed , stranded PVC insulated

– CAT 5 or 6 Cable

DDC CONTROL LOOP

BACNet Router

SCHEMATIC DIAGRAM FOR BUILDING MANAGEMENT SYSTEM

Alarm / Report

Printer

Modem

Operator Work station

Remote Web browser client

BACnet / LON

DDC

DRAWING: AHU Control

T Two way valve actuator

Room Temperature sensor

www SMS

Soft Room Temperature Set point

from Operator Workstation

CAT 6 Cable

Shielded Twist Pair

Typical BMS System Architecture

Four-conductor shielded cable with

metal foil shield and drain wire.

Application & Use Type of Wire

1. Communication Cabling between

DDC to DDC

2 core Twisted & Shielded Pair of

Wire 0.8 sq mm to 1.5 sq mm

2. Signal Cabling between Thermistor

Temp. Sensors & DDC

2 core Twisted & Shielded Pair of

Wire 0.8 sq mm to 1.5 sq mm

3. Signal Cabling between Active

Sensors & DDC

2 or 3 or 4 core Twisted & Shielded

Pair of Wire 1 sq mm or 1.5 sq mm

4. Cabling between VAV Zone Sensor

& VAV

2/3/4 core depending upon the type

of Zone Sensor 0.8 sq mm to 1.5 sq

mm

5. Cabling between Valve Actuator &

DDC

2/4 core 1 or 1.5 sq mm

6. System Level Cabling CAT 6 cabling

Typical I-O DEVICES IN HVAC SYSTEM

Typical BMS Wiring Interlock with the Starter Panel

Differential Pressure Sensor Wiring Details

Building Room Pressure Transducer Wiring Details

VFD Wiring Details

Typical Chiller Motorized Isolation Valve Wiring

Typical DDC Wiring Details

BACNet Router

SCHEMATIC DIAGRAM FOR BUILDING MANAGEMENT SYSTEM

Alarm / Report

Printer

Modem

Operator Work station

Remote Web browser client

BACnet / LON

DDC

DRAWING : Networked VAVs

THROUGH GATEWAY

www SMS

VAV Controller ..n

VAV Controller-01

Gateway

Room Temperature &

Set point

Damper

Actuator

CAT 5 Cable

Shielded Twist Pair

Shie

lded

Tw

ist P

air

BACNet Router

SCHEMATIC DIAGRAM FOR BUILDING MANAGEMENT SYSTEM

Alarm / Report

Printer

Modem

Operator Work station

Remote Web browser client

BACnet / LON

DDC

DRAWING : Networked PACs

THROUGH GATEWAY

www SMS

Gateway

PAC PAC PAC

PAC= Precision Air Conditioning

CAT 5 Cable

Shielded Twist Pair

Shielded Twist Pair