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RT-SVX19A-E448
Figure 22 - Minimum fresh air adjustment
1 = ECA board
1234
1
2
1
2
1
2
1
2
1
2
1
2
1
2
EXF
EXF
MAT
OAH
AH
/
OAE
OAT
RAT
RAH
AH
/
RAE
DCV
DCV
2-10 VDC
2-10 VDC
FEED
FEED
BACK
INPUT
INPUT
+
-
+
-
2-10 VDC
2-10 VDC
CONT
ONT
ROL
OUTPUT
OUTPUT
MIN POS.
MIN POS.
SETPOINT
SETPOINT
0-50%
0-50%
ABCD
ABCD
SE
SE
TTING
TING
S
CO2 "PU
O2 "PU
RGE
GE
"
SETPOINT
SETPOINT
ADJUS
ADJUS
TMEN
MEN
T
500-1500 PPM
500-1500 PPM
GREEN
GREEN
LED
LED
POWER EXH
WER EXH
AUS
US
T
CON
ON
TACTS
MIXED AIR SENSOR INPUT
MIXED AIR SENSOR INPUT
COMMO
OMMO
N
COMMO
OMMO
N
OHS INPUT
OHS INPUT
NOT USED-
T USED-
OAT I
T I
S
CONNECTED
ONNECTED
TO
O
RTR
TR
M
RA INPU
A INPU
T
COMMO
OMMO
N
COMMO
OMMO
N
RHS INPUT
RHS INPUT
CO2 SENSOR INPU
O2 SENSOR INPU
T
COMMO
OMMO
N
P
P1
P1
REM
REM
OTE
MINIMUM
MINIMUM
POTENTIOMETE
TENTIOMETE
R
SHO
SHO
RTED=C
TED=C
LOSE
OSE
D
OPEN=ON B
OPEN=ON B
OARD P
ARD P
OT.
270 omega = 50%
270 omega = 50%
WHT
WHT
RED
RED
BLUE
MOD
MOD
BUS
-
+
COMMO
OMMO
N
24
24
VAC
+
1
POWER EXHAUST
CONTACTS
MIXED AIR SENSOR
INPUT COMMON
COMMON
OHS INPUT
NOT USED-OAT IS
CONNECTED TO
RA INPUT
COMMON
COMMON
RHS INPUT
CO
2
SENSOR INPUT
COMMON
SHORTED=CLOSED
OPEN=ON CARD POT.
270 omega = 50%
REMOTE
MINIMUM
POTENTIOMETER
CO2 “PURGE”
SETPOINT
ADJUSTMENT
500-1500 PPM
GREEN
LED
COMMON
24VAC
MODBUS
2-10 VDC
CONTROL
OUTPUT
2-10 VDC
FEEDBACK
INPUT
MIN POS.
SETPOINT
0-50%
ABCD
SETTINGS
WHT
RED
BLUE