Data Sheet for Product

Page 2 of 8 Siemens Building Technologies, Inc.
Document No. 127-0548
Table 1. Constant Volume, Return Air, Zone Control Rooftop Unit.
Point Type Description Range/Units
27 LDI Return Fan Status Off/On
28 LAI Reheat Operating Hours Hours
29 LAI Dew Point Temperature
°F
30 LAI Current Alarm (Buffer) See Table 6
31 LAI Cooling Stages Number
32 LAI Heating Stages Number
33 LAI Reheat Stages Number
34 LAI Reheat Set Point
°F
37 LDO Outside Air Source Type Local/Remote
38 LAO Reheat Deadband
0 – 10°F
39 LDO Humidity Control Type Humidity/Dewpoint
40 LAO Humidity Set Point 0 – 100%
41 LAO Humidity Deadband 0 – 10%
42 LAO Dewpoint Set Point
0 – 87°F
43 LAO Dewpoint Deadband
0 – 10°F
44 LAO Minimum Dehumidification Cool Stage 0 – 8
45 LDO Clear Alarm. Warning and problem conditions are normally self-
clearing once abnormal condition is resolved. Fault conditions cause
unit to shut down and must be manually cleared. Refer to alarms
later in this section for more information.
Point Automatically Reset to 0 After
Alarm is Cleared/Clears Active
Fault.
46 LAO Control Mode See Table 7
47 LAO Override Timer. The unit does not start if a shut down fault is active
or the unit is manually disabled through the keypad, monitor
program, or remote panel. Set to zero for unoccupied mode. ≤ 1 sets
point to occupied mode if manual mode set to auto.
0 – 300 Minutes
48 LAO Control Temperature Sensor See Table 2
49 LDO Set Point Source. Constant volume units can use space temperature
set points from a room thermostat or set points in software.
Thermostat/Point 50, Point 53
50 LAO Heating Space Set Point. If set point source point is 1, this point is
active heating set point. If it is 0, thermostat determines the set point.
Night setback (NSB) is active during unoccupied time period.
40 – 99°F
52 LAO Heating Space Deadband
0 – 10°F
53 LAO Cooling Space Set Point. If set point source point is 1, this point is
the active cooling set point. If it is 0, the thermostat determines set
point. The night setup (NSU) set point is active during the
unoccupied time period.
55 – 99°F
55 LAO Cooling Space Deadband
0 – 10°F
56 LAO Night Setback Space Set Point
40 – 99°F
57 LAO Night Setback Space Differential
1 – 10°F
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