Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 67)

Auto-Zone Plus
Section 2
Design Guide 2-35
CV-C Expansion Board Wiring
Notes:
Required VA For Transformer
Each CV-C Controller = 20VA Min.
Required VA For Transformer
Relay Expansion Board = 20VA Max.
24VAC
24VAC
GND
GND
Caution!
Relay Expansion Board Must Have Address Switches Set As
Shown Or The Board Will Not Function.
Caution:
Disconnect The Modular Cable Between The CV-C Controller And The
Relay Expansion Board Before Removing Power From The Relay
Expansion Board. Reconnect Power And Then Reconnect The Modular
Cable Between The CV-C Controller And The Relay Expansion Board.
1.)24 VAC Must Be Connected So
That All Ground Wires Remain
Common.
2.)All Wiring To Be In Accordance
With Local And National Electrical
Codes And Specifications.
Note:
Set-up, Programming And Monitoring Of The CV-C Controller Requires The
Use Of A Personal Computer And Prism Software.
EXPANSION
SENSOR
PRESSURE
T'STAT
24VAC
GND
Relay Outputs R6 Thru R13 May Be User
Configured For The Following:
0 - Not Used (Nothing connected to this
output )
1 - Heating Stage
2 - Cooling Stage
3 - Humidifier Enable
4 - Reheat Enable
5 - Scheduled Relay from Internal Schedule
6 - Scheduled Relay from External Schedule
(Only 1 Available!)
CV- C Controller
Relay Expansion Board
EXPANSION PORT
24VAC
IN OUT
COM
Connect Expansion Board
to CV-C Controller
with Modular Cable
Not Used
PO
W
E R
U4
U5
U3
U1
RELAY 1
RELAY 2
RELAY 3
ADDRESS
RELAY 4
RELAY 5
RELAY 6
RELAY 7
RELAY 8
N.
O
. C
O
NT
A
C
T S
1 -
8
RE
LA
Y
CO
M
M
O
N
S
9,
10
Warning:
If One Transformer Is Used To Power The CV-C Controller And The
Relay Expansion Board, Polarity Must Be Strictly Observed. If The
Polarity Is Reversed, Serious Damage To Both Boards Will Result.
Figure 2-24:
CV-C Expansion Board Wiring
Warning: Polarity is very important when connecting power to the controllers!
The grounded side of the control transformer must be connected to the
terminal labeled GND on the CV-C Controller. If a single transformer
is used to power more than one CV-C Controller you must connect
GND-to-GND and 24VAC-to-24VAC on each CV controller. Failure
to observe polarity will result in damage to one or more components
in your system.