Operation
RT-SVX19A-E4
48
Figure 22 - Minimum fresh air adjustment
1 = ECA board
1
2
3
4
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
FEEDBACK
INPUT
INPUT
+
-
+
-
2-10 VDC
2-10 VDC
CONT
ONTROL
OUTPUT
OUTPUT
MIN POS.
MIN POS.
SETPOINT
SETPOINT
0-50%
0-50%
ABCD
ABCD
SE
SETTING
TINGS
CO2 "PU
O2 "PU
RGE
GE"
SETPOINT
SETPOINT
ADJUS
ADJUS
TMEN
MENT
500-1500 PPM
500-1500 PPM
GREEN
GREEN
LED
LED
POWER EXH
WER EXH
AUS
UST
CON
ONTACTS
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 IS
CONNECTED
ONNECTED
TO
O RTR
TRM
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
REMOTE
MINIMUM
MINIMUM
POTENTIOMETE
TENTIOMETE
R
SHO
SHORTED=C
TED=CLOSE
OSED
OPEN=ON B
OPEN=ON B
OARD P
ARD POT.
270 omega = 50%
270 omega = 50%
WHT
WHT
RED
RED
BLUE
MOD
MODBUS
-
+
COMMO
OMMO
N
24
24VAC
+
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