32
Table 5 -- Menu Structure* (cont)
Menu
Parameter
Parameter
Default
Value
Parameter
Range and Increment
{
EXPANDED PARAMETER NAME
Notes
SYSTEM
SETUP
INSTALL
01/01/10
Display order = MM/DD/YY
Setting order = DD, MM, then YY.
UNITS DEG
_
F
_
F or
_
C
Sets economizer controller in degrees Fahrenheit or Celsius.
EQUIPMENT
CONV
Conventional or HP
CONV = conventional;
HP O/B = Enable Heat Pump mode. Not available with 2---speed
See Menu Note 4
AUX2 I
W
W required for 2---speed
mode
W = Informs controller that system is in heating mode.
SD = Enables configuration of shutdown (not available on 2---Speed)
See Menu Note 4
FAN TYPE
2speed
2speed required
Sets the economizer controller for operation of 1 speed or 2 speed indoor
fan system.
See Menu Note 4.
FAN CFM
5000cfm
100 to 15000 cfm;
increment by 100
UNIT DESIGN AIRFLOW (CFM)
Enter ONLY of using DCVCAL ENA = AUTO
The value is found in the Project Submittal documents for the specific RTU.
AUX OUT
NONE
NONE
EXH2
SYS
Select OUTPUT for AUX1 O relay
NONE = not configured (output is not used)
EXH2 =
second damper position relay closure for second
exhaust fan
SYS =
use output as an alarm signal
OCC
INPUT
INPUT or ALWAYS
OCCUPIED MODE BY EXTERNAL SIGNAL
When using a setback thermostat with occupancy out (24 Vac), the 24 Vac
is input to the OCC terminal. RTU control circuit provides 24---Vac to OCC
through OCCUPIED terminals on Integrated Staging Control Board.
FACTORY DEFAULT
NO
NO or YES
Resets all set points to factory defaults when set to YES. LCD will briefly
flash YES and change to NO but all parameters will change to the factory
default values.
RECHECK AUX2 I and FANTYPE for required 2---speed
values.
ADVANCED
SETUP
MA LO SET
45
_
F
(7
_
C)
35 to 55
_
F;
(2 to 12
_
C)
Incremented by 1
_
SUPPLY AIR TEMPERATURE LOW LIMIT
Temperature to achieve Freeze Protection (close damper and alarm if
temperature falls below setup value)
FREEZE POS
CLO
CLO or MIN
FREEZE PROTECTION DAMPER POSITION
Damper position when freeze protection is active
CLO = closed
MIN = MIN POS or VENTMAX
CO2 ZERO
0ppm
0 to 500 ppm:
Increment by 10
CO
2
ppm level to match CO
2
Sensor start level.
CO2 SPAN
2000ppm
1000 to 3000 ppm;
Increment by 50
CO
2
ppm span to match CO
2
sensor.
STG3 DLY
2.0h
0 min, 5 min, 15 min,
then 15 min intervals.
Up to 4 h or OFF
COOLING STAGE 3 DELAY
Delay after stage 2 for cool has been active. Turns on 2
nd
stage of cooling
when economizer is 1
st
stage and mechanical cooling is 2
nd
SD DMPR POS
CLO
CLO or OPN
Function NOT AVAILABLE with 2---speed mode
DCVCAL ENA
MAN
MAN (manual)
Turns on the DCV automatic control of the dampers. Resets ventilation.
MATTCAL
0.0
_
F
(or C)
+/---2.5
_
F
(+/---1.4
_
C)
SUPPLY AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration supply air
temperature (SAT) sensor
OA T CAL
1.0
_
F
(or C)
+/---2.5
_
F
(+/---1.4
_
C)
OUTSIDE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration outside air
temperature (OAT) sensor
OA H CAL
0% RH
+/---10% RH
OUTSIDE AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of outside air enthalpy sensor
RA T CAL
2.0
_
F
(or C)
+/---2.5
_
F
(+/---1.4
_
C)
RETURN AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration return air
temperature (RA) sensor
RA H CAL
0% RH
+/---10% RH
RETURN AIR HUMIDITY CALIBRATION
Allows for the operator to adjust for an out of calibration return air enthalpy
sensor
DA T CAL
0.0
_
F
(or C)
+/---2.5
_
F
(+/---1.4
_
C)
DISCHARGE AIR TEMPERATURE CALIBRATION
Allows for the operator to adjust for an out of calibration discharge air
temperature (DAT) sensor
2SP FAN DELAY
5 Minutes
0 to 20 minutes in
1 minute increments
TIME DELAY ON 2
nd
STAGE ECONOMIZING
While in the Economizing mode, this is the delay between thermostat Y2
call and Y1---O output to mechanical cooling stage, to allow high speed fan
operation to attempt to cool space first.
Summary of Contents for WeatherExpert 50LC
Page 4: ...4 a50 9584 Fig 2 Unit Dimensional Drawing ...
Page 5: ...5 a50 9585 Fig 2 Unit Dimensional Drawing cont ...
Page 14: ...14 a50 9586 Fig 17 50LC 07 Electro mechanical Control Wiring Diagram ...
Page 15: ...15 a50 9592 Fig 18 50LC 07 RTU Open Control Wiring Diagram ...
Page 16: ...16 a50 9587 Fig 19 50LC 07 SystemVut Control Wiring Diagram ...