Data Sheet for Product

Point Map

Rev. 3, February, 2002

Siemens Building Technologies, Inc. Page 1 of 2

Document No. 127-0026

Systems Integration

APOGEE

Open Processor with McQuay Microtech

Driver: Lead-Lag-Load Balance

Table 1. Lead-Lag-Load Balance.

Point Type Description Range/Units

01 LAO Device Address —

02 LAO Application Number 5005

03 LAO Mode See Table 2

04 LAO Chilled Water Reset. Compressors are controlled using the leaving

evaporator set point. Both compressors must have the same set

point.

0 – 100%

05 LAO Demand Reset. This reset limits the amp usage for all chillers on the

network. Both compressors must have the same set point. The

demand reset ranges from no demand to the maximum demand limit

set point.

0 – 100%

06 LDI Chiller 1 Communication Status Error/OK

07 LDI Chiller 2 Communication Status Error/OK

08 LDI Chiller 2 In Lead Chiller 1 Lead

Chiller 2 Lag/Chiller 1 Lag

Chiller 2 Lead

09 LAI Enable Lag Run Load Amps (RLA) 80 – 100%

10 LAI Disable Lag Run Load Amps (RLA) 35 – 60%

11 LAI Delay Time Control 1 – 10 minutes

99 LDI Device Communication Failure Normal/Failed

PAGE 1
Point Map Rev. 3, February, 2002 Systems Integration APOGEE¥ Open Processor with McQuay Microtech Driver: Lead-Lag-Load Balance Table 1. Lead-Lag-Load Balance. Point Type Description 01 LAO Device Address — 02 LAO Application Number 5005 03 LAO Mode See Table 2 04 LAO Chilled Water Reset. Compressors are controlled using the leaving evaporator set point. Both compressors must have the same set point. 0 – 100% 05 LAO Demand Reset.
PAGE 2
Table 2. LLLB Mode (Point 03). Value Description 0 No Open Protocol (Normal Operation) 1 Off – Compressor 1 and 2 Disable 2 On – Auto Lead/Lag 3 On – Compressor 1 Lead, Compressor 2 Lag 4 On – Compressor 2 Lead, Compressor 1 Lag 5 On – Compressor 1 Enable, Compressor 2 Disable 6 On – Compressor 2 Enable, Compressor 1 Disable Information in this document is based on specifications believed correct at the time of publication.