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Table 4.
Controller menu structure (continued)
Menu
Parameter
EXH1
OUT(c)
EXH2 OUT
ERV
STATUS
MECH COOL
FAN
SPEED(c)
W (HEAT
IN)(c)
MAT
SET(c)
LOW T
LOCK(c)
DRYBLB
SET(c)
ENTH
CURVE(c)
DCV
SET(c)
MIN
POS(c)
SETPOINTS
VENTMAX(c)
VENTMIN(c)
ERV OAT SP
EXH1
SET(c)
ACC-SVN203C-EN
Parameter
Parameter
Default
Range and
Value
Increment
OFF
ON/OFF
OFF
ON/OFF
OFF
ON/OFF
ON(c)
0
0, 1, or 2
N/A
LOW or HIGH
N/A
ON/OFF
38 to 70°F;
53ºF
increment by 1
-45 to 80°F;
32ºF
increment by 1
48 to 80°F;
63ºF
increment by 1
ES1, ES2, ES3,
ES3
ES4, or ES5
500 to 2000
1100ppm
increment by
2.8 V
2 to 10 Vdc
2 to 10 Vdc
2.8 V
100 to 9990 cfm
increment by 10
2 to 10 Vdc
2.25 V
100 to 9990 cfm
increment by 10
0 to 50°F;
32ºF
increment by 1
1 to 100%;
50%
increment by 1
Parameter
Recommended
(a)
(b)
Value
N/A
N/A
N/A
N/A
N/A
N/A
53ºF
32ºF
67ºF
ES3
ppm
1100ppm
100
2.8V/3.2V LO/2.8V
HI
or
2.8V/3.2V LO/2.8V
HI
or
2.25V/2.5V LO/
2.25V HI
N/A
50%/65% LO/50%
HI
Economizer Controller
Notes
Output of EXH1 terminal. Displays ON when damper
position reaches programmed percentage setpoint.
ON = 24 Vac Output; OFF = No Output
EXH2 OUT is not available
ERV is not available
Displays number of mechanical cooling stages that
are active
Displays speed of fan on a 2-speed fan unit
Displays status of heat on a 2-speed fan unit.
The economizer will modulate the OA damper to
maintain the mixed air temperature at the setpoint
Setpoint determines outdoor temperature when the
mechanical cooling cannot be turned on. Commonly
referred to as the Compressor lockout. At or below
the setpoint the Y1-O will not be energized on the
controller
Setpoint determines where the economizer will
assume outdoor air temperature is good for free
cooling; e.g.; at 63ºF setpoint unit will economizer
at 62ºF and below and not economize at 64ºF and
above. There is a a 2ºF deadband
Enthalpy boundary "curves" for economizing using
single enthalpy
See Table for description of enthalpy curves
Displays ONLY if a CO
sensor is connected.
2
Setpoint for Demand Control Ventilation of space
Above the setpoint, the OA dampers will modulate
open to bring in additional OA to maintain a space
ppm level below the setpoint
Displays ONLY if a CO
sensor is NOT connected.
2
With 2-speed fan units MIN POS L (low speed fan)
and MIN POS H (high speed fan) settings are
required. Default for MIN POS L is 3.2V and MIN POS
H is 2.8V
Displays only if a CO
sensor is connected. Used for
2
Vbz (ventilation max cfm) setpoint. VENTMAX is the
same setting as MIN POS would be if you did not
have the CO
sensor. Displays 2 to 10 V if <3
2
sensors (RA,OA and MA). In DCV CAL ENABLE AUTO
mode dampers controlled by CFM With 2-speed fan
units VENTMAX L (low speed fan) and VENTMAX H
(high speed fan) settings are required. Default for
VENTMAX L is 3.2V and VENTMAX H is 2.8V
Displays only if CO
sensor is connected. Used for
2
Va (ventilation min cfm) setpoint. This is the
ventilation for less than maximum occupancy of the
space. Displays 2 to 10 V if <3 sensors (RA,OA and
MA). Va is only set if DCV is used
In DCV CAL ENABLE AUTO mode dampers
controlled by CFM With 2-speed fan units VENTMIN
L (low speed fan) and VENTMIN H (high speed fan)
settings are required. Default for VENTMIN L is 2.5V
and VENTMIN H is 2.25V
ERV OAT SP is not available
Setpoint for OA damper position when exhaust fan
1 is powered by the economizer
With 2-speed fan units Exh1 L (low speed fan) and
Exh1 H (high speed fan) settings are required
Default for Exh1 L is 65% and Exh1 H is 50%
15
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