Data Sheet for Product

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

Point Map

September 8, 2004

Systems Integration

APOGEE

Open Processor with McQuay Microtech

Driver: Two-Compressor Screw Chiller

Table 1. Two-Compressor Screw Chiller.

Point Type Description

Range/Units

LAO

Device Address

—

LAO

Application Number 5048

3LAI

Unit Status See Table 2

4LAI

Circuit 1 Status SeeTable 3

LAI

Circuit 2 Status See Table 3

6LAI

Stage of Cooling

0–8

LAI Evaporator Leaving Water

Temperature

-40–263°F

8 LAI Evaporat

or Entering Water

Temperat

ure

-40–263°F

9LAI

Condenser Leaving Water

Temperature

-40–263°F

10 LAI

Condenser Entering Water

Temperature

-40–263°F

11 LAI

Outside Air Temperature -40 – 263°F

12 LAI

Circuit 1 Suction

Temperature. Temperature

of low-pressure va porized

refrigerant entering the

compressor.

-40–263°F

13 LAI

Circuit 2 Suction

Temperature. Temperature

of low-pressure va porized

refrigerant entering the

compressor.

-40–263°F

14 LAI

Circui

t 1 Liquid Line

Temp e r

ature. Temperature

of liqu

id refrigerant entering

the exp

ansion valve.

-40–26

3°F

continued on next page...

iemens Building Technologies, Inc.

age 1 of 8

ocument No. 127-0011

Summary of content (8 pages)

PAGE 1
Point Map September 8, 2004 Systems Integration APOGEE® Open Processor with McQuay Microtech Driver: Two-Compressor Screw Chiller Table 1. Point Type Two-Compressor Screw Chiller.
PAGE 2
Table 1. Two-Compressor Screw Chiller. (continued) 15 LAI Circuit 2 Liquid Line Temperature. Temperature of liquid refrigerant entering the expansion valve. -40 – 263°F 16 LAI Circuit 1 Superheat Temperature. Calculated by subtracting the evaporator refrigerant temperature (Point 12) from the suction temperature. 0 – 263°F 17 LAI Circuit 2 Superheat Temperature. Calculated by subtracting the evaporator refrigerant temperature (Point 13) from the suction temperature.
PAGE 3
Table 1. Two-Compressor Screw Chiller. (continued) 27 LAI Compressor 1 Operating Hours 0 – 65,279 28 LAI Compressor 2 Operating Hours 0 – 65,279 29 LAI Compressor 1 Starts 0 – 65,279 30 LAI Compressor 2 Starts 0 – 65,279 31 LAI Circuit 1 Alarm See Table 4 32 LAI Circuit 2 Alarm See Table 4 33 LAI Circuit No. 1 Condition at Time of Alarm: Capacity 0 – 100% 34 LAI Circuit No.
PAGE 4
Table 1. Two-Compressor Screw Chiller. (continued) 46 LAI Circuit No. 2 Condition at Time of Alarm: Evaporator Pressure 0 – 150 psi 47 LAI Circuit No. 2 Condition at Time of Alarm: Liquid Line Temperature -40 – 263°F 48 LAI Circuit No.
PAGE 5
Table 2. Unit Status (Point 03). (continued) 12 Cool Stage-down 13 Cool Staging 14 Manual Cool Staging Table 3. Circuit Status (Points 04 and 05). Value Description 0 Off – S-1 System Switch 1 Off – Manual Set Point 3 Off – Pump-down Switch 4 Off – Wait for Cycle 5 Off – Wait for Flood 6 Off – Ready to Start 7 Start Pump-down 8 Pump-down 9 Start Requested 10 Pre-purge 11 Open Solenoid 12 Low Ambient Start 13 Cooling Table 4. Alarms (Points 31 and 32).
PAGE 6
Table 4. Alarms (Points 31 and 32). (continued) 19 Low Lift Pressure 21 No Liquid Start 22 Low Oil Pressure 26 Mechanical High Pressure 29 Bad Compressor Suction Temperature Sensor 30 Bad Evaporator Pressure Sensor 31 Bad Condenser Pressure Sensor 32 Bad Phase Voltage 33 Chilled Water Freeze Protect 34 Bad Voltage Ratio 35 Bad Leaving Evaporator Temperature Sensor Table 5. Value Reset Option (Point 51). Description 0 No Chilled Water Reset 1 Return Chilled Water Reset.
PAGE 7
Table 5. Siemens Building Technologies, Inc. Document No. 127-0011 Reset Option (Point 51). (continued) 3 Network Chilled Water Reset. Resets Chilled Water Set Point based on the Network Evaporator Leaving Temperature Reset. A signal of 0 – 100% results in a linear reset between the Chilled Water Set Point and the Maximum Chilled Water Reset Set Point plus the Chilled Water Set Point. 4 Ice Chilled Water Reset. Resets the Chilled Water Set Point (typically 23°F) based upon a 4 – 20 mA signal.
PAGE 8
Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2004 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 U.S.A. Document No.