Data Sheet for Product

Siemens Building Technologies, Inc. Page 5 of 10
Document No. 127-0028
Table 2. Series 100 Centrifugal Chiller.
Point Type Description Range/Units
66 LAI Fault 5 See Table 4
67 LAI Fault 6 See Table 4
68 LAI Fault 7 See Table 4
69 LAI Fault 8 See Table 4
70 LAO Leaving Evaporator Temperature Set Point. Internal memory has a
limited life, so use network chilled water reset point (Point 71) instead
to adjust set point.
20 – 71°F
(Value of 0 or 255 indicates an
error)
71 LAO Network Chilled Water Reset (% of mA). Compressors are controlled
using the leaving evaporator set point (Point 70). Both compressors
must have the same set point. The reset option must be set to
“amp_chw” at value of 11.0.
0 – 20% = No Reset
20 – 100% = Linear Reset Values
[0 – Maximum Chilled Water Reset
(Point 80)]
72 LAI Calculated Leaving Evaporator Temperature Set Point
20 – 71°F
(Value of 0 or 255 indicates an
error)
73 LAO Network Amp Reset (% of mA). This reset limits the amp usage for
all chillers on the network. Both compressors must have the same
set point. A value of 20 or less will result in no demand limit. A value
written from 20 to 100 will linearly reset the maximum % RLA from
100% to 40% RLA respectively.
0 – 20% = No Reset
20 – 100% = Linear Reset Values
74 LAI Calculated Network Amp Set Point 0 – 100%
75 LAO Network Start/Stop. If the chiller loses power, this point is reset to 0
and normal operation resumes. It may be necessary to use PPCL to
periodically command the point to keep the chiller under network
control. Start mode must be set to “remote” at a value of 5.0.
0 = Normal Operation
255 = Shut down chiller
76 LDO Soft Reset Off/On
77 LAO Start Mode. This point is controlled locally if the value is 4. This point
should always be set to 5 for network control.
4 = Ignore Network Control
5 = Chiller Starts in Response to
Network
78 LDO Clear Current Fault Off/On
79 LAI Manual Amp Limit Set Point 0 – 100%
80 LAO Maximum Chilled Water Reset Set point
0 – 75°F
81 LAO Reset Option See Table 5
82 LAO Startup Differential Temperature
5 – 50°F
83 LAO Shutdown Differential Temperature
5 – 50°F
84 LAI Motor Current Amps A
99 LDI Device Communication Failure Normal/Failed