beautypg.com

Terminal, identification and function, Wiring – Viconics VZ7656H Wireless Installation Guide User Manual

Page 6

background image

6 | VZ7656R & VZ7656H-Installation Guide

T

ERMINAL

,

I

DENTIFICATION AND

F

UNCTION

Wiring

Terminal Use

Terminal

Identification

Description

Rooftop

Heat pump

RTU

HP

1

– Cool 2

Compressor

2

Y2

Output for cooling / compressor stage
number 2.

2

– Cool 1

Compressor

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

Reversing
valve

W2

O/B

Output for heating stage number 2 for
VZ7656R1000B
Output for reversing valve for
VZ7656H1000B

9

– By-pass damper

BPD

Local analog 0 - 10 VDC by-pass damper /
VFD output.

10

– Aux output

AU

Auxiliary output used to disable economizer
damper minimum position or control lighting
during unoccupied periods.

11

– Static pressure

SP

Local analog 0

– 5 VDC static pressure

input.

12 - DI1

DI

Configurable extra digital input. See
parameter section for more information.

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.





This manual is related to the following products: