22
Table 6 - Menu Structure (Cont.)
a
Menu
Parameter
Parameter
Default
Value
Parameter range and
Increment
b
Notes
Setpoints
MAT SET
53° F
38 to 65° F
Increment by 1
Setpoint determines where the economizer will
modulate the OA damper to maintain the mixed air
temperature.
LOW T LOCK
32° F
- 45 to 65° F
Increment by 1
Setpoint determines outdoor temperature when the
mechanical cooling cannot be turned on. Commonly
referred to as the Compressor lockout.
DRYBULB SET
63° F
48 to 80° F
Increment by 1
Setpoint determines where the economizer will
assume outdoor air temperature is good for free
cooling; e.g.; at 63
° F unit will economize at 62° Fand
below and not economize at 64
° F and above. There
is a 2
° F deadband.
ENTH CURVE ES3
ES1, ES2, ES3, ES4, or
ES5
Enthalpy boundary “curves” for economizing using
single enthalpy
DCV SET 1100 ppm
500 to 2000 ppm
Increment by 1
Displays only if CO2 sensor is connected. 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.
MIN POS 4.4V 2to10VDC Displays ONLY if a CO2 sensor is NO T connected.
VENTMAX With 2- speed
fan units VENTMAX L (low
speed fan) and VENTMAX H
(high speed fan) settings
are required
4.4V
2to10VDC
or
100 to 9990 cfm
Increment by 10
Displays only if a CO2 sensor is connected. Used for
Vbz (ventilation max cfm) setpoint. Displays 2 to 10 V
if <3 sensors (RA,OA, and MA). In AUTO mode
dampers controlled by CFM.
VENTMAX L 6V
VENTMAX H 4.4V
VENTMIN With 2- speed
fan units VENTMIN L (low
speed fan) and VENTMIN H
(high speed fan) set
2.8V
2to10VDC
or
100 to 9990 cfm
Increment by 10
Displays only if a CO2 sensor is connected. Used for
Ba (ventilation min cfm) setpoint. Displays 2 to 10 V if
<3sensors(RA,OA,andMA).VaisonlysetifDCVis
used. This is the ventilation f or less than maximum
occupancy of the space. In AUTO mode damp ers
controlled by CFM.
VENTMIN L 3.7V
VENTMIN H 2.8V
ERV OAT SP
32° F
0to50° F
Increment by 1
Only when AUX1 O = ERV
EXH1 SET With 2- speed
fan units Exh1 L (low speed
fan) and Exh1 H (high
speed fan) settings are
required
50%
0 to 100° F
Increment by 1
SetpointforOAdamperpositionwhenexhaustfan1
is powered by the economizer.
Exh1 L 65%
Exh1 H 50%
EXH2 SET With 2- speed
fan units Exh2 L (low speed
fan) and Exh2 H (high
speed fan) settings are
required
75%
0 to 100° F
Increment by 1
SetpointforOAdamperpositionwhenexhaustfan2
is powered by the economizer. Only used when AUX
is set to EHX2.
Exh2 L 80%
Exh2 H 75%
40QQ
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