Fig.
12
—
Control
Board
Diagram
LEGEND
CCN
Carrier
Comfort
Network
R—
Relay
COM
Common
SIO
Serial
Input/Output
D—
Diode
SW
Switch
N.C.
Normally
Closed
T—
T
erminal
N.O.
Open
*Where
X
is
the
unit
control
software
version
(1
or
2).
14
