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 8

Document No. 127-0025

Systems Integration

APOGEE

Open Processor with McQuay MicroTech

Driver Point Map: Reciprocating Chiller Controller (US)

Table 1. Reciprocating Chiller Controller (US).

Point Type Description Range/Units

01 LAO Device Address –

02 LAO Application Number 5006

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 Stage Of Cooling. Normal mode for chiller while cooling. Point

displays number of currently active cooling stages which only

indicate system capacity and not which compressors or circuits are

on.

1 – 8

07 LAI Leaving Evaporator Water Temperature

-40 – 263°F

08 LAI Entering Evaporator Water Temperature

-40 – 263°F

09 LAI Leaving Condenser Water Temperature

-40 – 263°F

10 LAI Entering Condenser Water Temperature or

Outside Air Temperature

-40 – 263°F

11 LAI Circuit 1 Suction Temperature

-40 – 263°F

12 LAI Circuit 2 Suction Temperature

-40 – 263°F

13 LAI Circuit 1 Liquid Line Temperature

-40 – 263°F

14 LAI Circuit 2 Liquid Line Temperature

-40 – 263°F

15 LAI Circuit 1 Superheat. Suction temperature minus evaporator

temperature.

°F

16 LAI Circuit 2 Superheat. Suction temperature minus evaporator

temperature.

°F

17 LAI Circuit 1 Condenser Approach Temperature. Condenser refrigerant

temperature minus leaving condenser refrigerant temperature.

°F

18 LAI Circuit 2 Condenser Approach Temperature. Condenser refrigerant

temperature minus leaving condenser refrigerant temperature.

°F

19 LAI Circuit 1 Subcooling. Leaving condenser water temperature minus

liquid line temperature.

°F

continued on next page...

Summary of content (8 pages)

PAGE 1
Point Map Rev. 3, February, 2002 Systems Integration APOGEE¥ Open Processor with McQuay MicroTech Driver Point Map: Reciprocating Chiller Controller (US) Table 1. Reciprocating Chiller Controller (US). Point Type Description Range/Units 01 LAO Device Address – 02 LAO Application Number 5006 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 Stage Of Cooling. Normal mode for chiller while cooling.
PAGE 2
Table 1. Reciprocating Chiller Controller (US). Point Type Description Range/Units 20 LAI Circuit 2 Subcooling. Leaving condenser water temperature minus liquid line temperature.
PAGE 3
Table 1. Reciprocating Chiller Controller (US). Point Type Description 52 LAO Network Demand Limit. A maximum number of cooling stages which can be achieved using this point. For example, if there are eight possible stages, 50% of the network demand limit is four stages. Range/Units 0 – 100% This is vital for systems which seek to reduce chiller capacity at certain times to avoid peak electrical demand charges.
PAGE 4
Table 2. Unit Status (Point 03). Value Page 4 of 8 Description 0 Off – Manual Set Point 1 Off – S-1 Switch. System switch is in stop position. 2 Off—System Communication 3 Off – Remote Switch. Chiller commanded off via the network. 4 Off – Time Schedule. The time schedule indicates an off time period. 5 Off – Compressor 1 or 2 Fault (Alarms). Condition exists that prevents normal operation. Chiller disabled. 6 Off – Pump-down Switches PS-1 and PS-2. Chilled water requirements met.
PAGE 5
Table 3. Circuit Status (Point 04 and 05). Value Description 0 Off – S-1 Switch 1 Off – Manual Set Point 2 Off – Alarm 3 Off – Pump-down Switch 4 Off – Wait for Cycle 5 Off – Ready to Start 6 Start Pump-down 7 Pump-down 8 Wait for Cooling Pressure 9 Cooling Table 4. Alarms (Points 34 through 37).
PAGE 6
Table 4. Alarms (Points 34 through 37).
PAGE 7
Table 5. Reset Option (Point 48). Value Siemens Building Technologies, Inc. Document No. 127-0025 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 4mA results in no reset of Chilled Water Temperature Set Point.
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. Other product or company names mentioned herein may be the trademarks of their respective owners. © 2002 Siemens Building Technologies, Inc. Siemens Building Technologies, Inc. 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 U.S.A. Printed in the U.S.A. Document No.