Viconics VZ7656E Installation Guide Manual do Utilizador descarregar pdf (Página 6)

6 | VZ7656E1000W Installation Guide

TERMINAL, IDENTIFICATION AND FUNCTION

Wiring

Terminal Use

Terminal

Identification

Description

1 – Cool 2

Y2

Output for cooling / compressor stage

number 2.

2 – Cool 1

Y1

Output for cooling / compressor stage

number 1.

3 - Fan

G

Output for the fan.

4 - 24 V ~ Hot

RC

Power supply of controller, hot side

(Delivered from the RTU).

5 - 0 V ~ Com

C

Power supply of controller, common side.

Also used as reference for the analog BPD

output when used (Delivered from the RTU).

6- Heat Switch Leg

RH

24 VAC switched leg for the heating stages.

 If heating stages are part or RTU,

install a jumper across RC & RH.

 If heating stages are part of separate

equipment with a different power

supply, feed external switched power

leg through RH without installing a

jumper across RC & RH.

7 – Heat 1

W1

Output for heating stage number 1.

8- Heat 2

W2

Output for heating stage number 2.

9 – By-pass damper

BPD

Local analog 0 - 10 VDC by-pass damper /

VFD output.

10 – Economizer Output

EC

0-10 VDC analog fresh air damper /

economizer output.

11 – Static pressure

SP

Local analog 0 – 5 VDC static pressure

input.

12 – AI

AI

0-10 VDC analog input for airflow transmitter

13 - RS

RS

Return air temperature sensor input. If

sensor fails, controller will use the on-board

thermistor sensor to control if the

communication is lost.

14 - Scom

Scom

Reference input for DI 1, RS, OS & DS.

15 - OS

OS

Outside air temperature sensor input.

16 - DS

DS

Discharge air temperature sensor input.

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