Data Sheet for Product

ManualsBrandsSiemens Manuals3rd party integrationMicrotech 2000 Water Source Heat Pump, Point Map

Point Map

Rev. 3, February, 2002

Siemens Building Technologies, Inc. Page 1 of 6

Document No. 127-0010

Systems Integration

APOGEE

Open Processor with McQuay Microtech

Driver: Three-Compressor Screw Chiller

Table 1. Three-Compressor Screw Chiller.

Point Type Description Range/Units

01 LAO Device Address —

02 LAO Application Number 5049

03 LAI Unit Status See Table 2

04 LAI Circuit 1 Status See Table 3

05 LAI Circuit 2 Status See Table 3

06 LAI Circuit 3 Status See Table 3

07 LAI Stage of Cooling 0 – 8

08 LAI Evaporator Leaving Water Temperature

-40 – 263°F

09 LAI Evaporator Entering Water Temperature

-40 – 263°F

10 LAI Outside Air Temperature

-40 – 263°F

11 LAI Circuit 1 Suction Temperature. Temperature of low-pressure

vaporized refrigerant entering the compressor.

-40 – 263°F

12 LAI Circuit 2 Suction Temperature. Temperature of low-pressure

vaporized refrigerant entering the compressor.

-40 – 263°F

13 LAI Circuit 3 Suction Temperature. Temperature of low-pressure

vaporized refrigerant entering the compressor.

-40 – 263°F

14 LAI Circuit 1 Liquid Line Temperature. Temperature of liquid refrigerant

entering the expansion valve.

-40 – 263°F

15 LAI Circuit 2 Liquid Line Temperature. Temperature of liquid refrigerant

entering the expansion valve.

-40 – 263°F

16 LAI Circuit 3 Liquid Line Temperature. Temperature of liquid refrigerant

entering the expansion valve.

-40 – 263°F

17 LAI Circuit 1 Superheat Temperature. Calculated by subtracting

evaporator refrigerant temp. (Point 11) from suction temperature.

0 – 263°F

18 LAI Circuit 2 Superheat Temperature. Calculated by subtracting

evaporator refrigerant temp. (Point 12) from suction temperature.

0 – 263°F

19 LAI Circuit 3 Superheat Temperature. Calculated by subtracting

evaporator refrigerant temp. (Point 13) from suction temperature.

0 – 263°F

continued on next page...

Summary of content (6 pages)

PAGE 1
Point Map Rev. 3, February, 2002 Systems Integration APOGEE¥ Open Processor with McQuay Microtech Driver: Three-Compressor Screw Chiller Table 1. Three-Compressor Screw Chiller.
PAGE 2
Table 1. Three-Compressor Screw Chiller. Point Type Description Range/Units 20 LAI Circuit 1 Subcooling Temperature. Calculated by subtracting liquid line temp. (Point 14) from condenser refrigerant temperature. 0 – 263°F 21 LAI Circuit 2 Subcooling Temperature. Calculated by subtracting liquid line temp. (Point 15) from condenser refrigerant temperature. 0 – 263°F 22 LAI Circuit 3 Subcooling Temperature. Calculated by subtracting liquid line temp.
PAGE 3
Table 1. Three-Compressor Screw Chiller. Point Type Description 55 LAI Circuit No. 2 Condition at Time of Alarm: Evaporator Leaving Water Temperature -40 – 263°F 56 LAI Circuit No. 2 Condition at Time of Alarm: Fan Stage 0–5 57 LAI Circuit No. 2 Condition at Time of Alarm: Evaporator Pressure 0 – 150 psi 58 LAI Circuit No. 2 Condition at Time of Alarm: Liquid Line Temperature -40 – 263°F 59 LAI Circuit No.
PAGE 4
Table 2. Unit Status (Point 03). Value Description 0 Off – Manual Set Point 1 Off – S-1 System Switch 2 Off – Remote Communication 3 Off – Remote Switch 4 Off – Time Schedule 5 Off – Alarm 6 Off – Pump-down Switches 7 Off – Ambient Lock 8 Starting 9 Waiting for Flow 10 Waiting for Load 11 Cool Stage-up 12 Cool Stage-down 13 Cool Staging 14 Manual Cool Staging Table 3. Circuit Status (Points 04–06).
PAGE 5
Table 4. Alarms (Points 41–43). Value Siemens Building Technologies, Inc. Document No.
PAGE 6
Table 5. Reset Option (Point 70). Value Description 0 No Chilled Water Reset 1 Return Chilled Water Reset. Constant return Chilled Water Temperature Set Point maintained. 2 4 – 20 mA Chilled Water Reset. Resets Chilled Water Set Point based on 4 – 20 mA signal. A signal less than 4 mA results in no reset of Chilled Water Temperature Set Point.