7
#12:
SYSTEM
CIRCUIT
#11:
THERMOSTAT
CIRCUIT
CH ECK OU T
PR OC EDUR E
#13:
DAMPER
CIRCUIT
K6
K7
R6
R7
C7
+
C6
+
D11
D12
D10
D6
D4
D9
D5
D3
D21
D22
D20
D19
D24
D23
D25
D26
C
W
Y
R
ZONE
2
T'STAT
C
W
Y
R
R1
0
B
G
ZONE
1
T'STAT
CAUTION
0
R
C
+
-
PLEASE read all
instructions carefully
before starting the
installation
procedures.
ADDITIONAL
ZONE
PANEL
D15
D16
D18
D17
C
W
Y
R
ZONE
3
T'STAT
HEATING MODE
OFF MODE
COOLING
MODE
STAT
DAMPER
CALLING
OPEN
NOT
CALLING
CLOSED
24
VOLTS
24
VOLTS
COMMON
COMMON
O
VOLTS
O
VOLTS
O
VOLTS
O
VOLTS
O
VOLTS
24
VOLTS
24
VOLTS
24
VOLTS
24
VOLTS
24
VOLTS
INPUT
TO
PANEL:
COMMON
24
VOLTS
NOTE:
Conditions
shown
are
with
at
least
one
thermostat
always
calling.
When all thermostats satisfy, damper
position
will
depend
on
position
of
"OPEN-CLOSED"
switch.
In
"OPEN"
position,
damper
will
drive
to
open
position.
In
"CLOSED" position,
all
voltage is removed from damper motor;
motor will remain in whatever position it
was in when all thermostats satisfied.
If 24 volts is present from M1 to M4 and
M1 to M6, damper motor may either be
turning
or
stuck
between
open
and
closed postions.
EWC Controls Inc.
•
385 Highway 33
•
Englishtown, NJ
07726 •
800-446-3110
• FAX 732-446-5362
K9
K8
K3
K5
K4
K2
K1
SW2
SW1
OPEN
OPEN
CLOSE
CLOSE
OPEN
CLOSE
M1
M2
M4
M6
ZONE3
M1
M1
M2
M2
M4
M4
M6
M6
ZONE2
ZONE1
MOTOR
MOTOR
MOTOR
X
R
G
W
Y
B
O
1
2
24V
T'FORMER
EWC-ST-3E
CONTROLS
Englishtown
K9
K8
K3
K5
K4
K2
K1
SW2
SW1
OPEN
OPEN
CLOSE
CLOSE
OPEN
CLOSE
M1
M2
M4
M6
ZONE3
M1
M1
M2
M2
M4
M4
M6
M6
ZONE2
ZONE1
MOTOR
MOTOR
MOTOR
X
R
G
W
Y
B
O
1
2
24V
T'FORMER
EWC-ST-3E
CONTROLS
Englishtown
O
VOLTS
24
VOLTS
COMMON
COMMON
24
VOLTS
24
VOLTS
COMMON
COMMON
24
VOLTS
24
VOLTS
CB1
CB1
