Viconics VT7606E Installation Manual - Manual (Page 6)

6
| PIR Ready VT7600 Series-Installation Guide
028-0363-02
T
erMinal
, i
denTifiCaTion and
f
unCTion
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 equip-
ment 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 – Economizer
Output
EC 0-10 VDC analog fresh air damper / economizer output.
10 – Analog
Heat Output
AO 0-10 VDC analog heating output.
11 – RS RS
Return air temperature sensor input. Used when com-
munication is lost. If remote sensor fails, thermostat will
use its on-board sensor to control.
12 – MS MS Discharge air temperature sensor input
13 – AI1 AI1 0-10 VDC analog input for CO2 transmitter
14 – Scom Scom Reference input for AI, RS, OS and DS
15 – OS OS Outside air temperature sensor input
16 –AI2 AI2 0-10 VDC analog input for airflow transmitter
Screw terminal arrangement and wiring
Controller terminals: