McQuay MicroTech II® Chiller System Manager

Cost effective HVAC system control solutions

The Chiller System Manager has powerful chiller plant management capabilities that can improveoperating efficiency and provide reliable cooling.

The MicroTech II Chiller System Manager (CSM) packspowerful chiller plant management flexibility into an easy touse, packaged program. McQuay’s CSM includes chillerplant management capabilities that can improve the systemoperating efficiency and provide reliable cooling.

Typical Applications• McQuay MicroTech II air or water-cooled chiller systems

with 2 to 12 chillers• Primary/secondary or primary only chiller sequencing • Stand-alone control or easy integration with your choice

of third party BAS using open, standard protocols

Benefits• Flexibility to accommodate most chiller sequencing

schemes for higher operating efficiency, lower energy costsand reliable cooling

• Single source responsibility for chillers and chiller systemstartup

• Reduced installation and commissioning costs due tofactory-packaged application

• Packaged graphical-based application is easy for operatorsto learn and use

• Scalable platform can grow as your chiller system expands

Chiller System Manager status screen for a typicalthree-chiller system

CapabilitiesChiller Sequencing Control• Constant volume or primary/secondary (de-coupled)

system control• Parallel chillers• Series chillers

- 2 or 3 series chillers per group- Parallel or counter flow

• Flexible chiller sequencing logic- Specified chiller sequencing order- Automatic sequencing based on run time- First on/last off chiller- Standby chiller(s)- Any combination of the above

Cooling Tower Control Options• Primary pump, condenser pump and cooling tower

dedicated to each chiller• Single tower system common to all chillers

Chilled Water Flow Control (De-coupled System)Constant differential pressure control• Lead/standby control of two variable speed cooling load

pumps based on run time or• Up to 6 variable speed cooling load pumps or• Up to 6 constant speed cooling load pumps or• Loop bypass valve control

Graphical Scheduling For Stand-alone Applications• Weekday schedules• Holiday schedules• Special event schedules• External input for remote scheduling by others

Optimal Start / Adaptive Optimal Start

Packaged, Flexible Chiller Plant Control

Password Protection

Rapid Restart on Power Loss Recovery

Inhibit Stage Up• Based on time of day (i.e. end of day)• Based on third party BAS output

Low Ambient System Lockout

Load Limiting• System demand limiting• Load balancing• Soft loading on system startup

Evaporator Leaving Water Temperature ResetFor improved chiller efficiency or temporary improveddehumidification, the chiller evaporator leaving watertemperature setpoint can be reset based on:• Return evaporator water temperature or• Outdoor air temperature or• External analog input or• Maintaining constant return evaporator water temperature

Chiller and Chiller System Alarms• Display, logging, acknowledgement and clearing of

individual chiller and chiller system alarms• Annunciation by alarm type (problems, warnings, faults) to:

- E-mail addressees (3 different “To” and “Cc” addresssets based on day of week and time of day)

- BACnet addressees (3 different designations based onday of week and time of day)

- Chiller System Manager LED- External horn- External contact closure

SpecificationsPlatform• Motorola RISC processor - 8245 family• 64 MB Ram• 32 MB Flash for database backup

User Interface• Non-dedicated PC with:

- Microsoft Internet Explorer™ Version 5.0 or higher- Microsoft Windows NT™ 4.0 with Service Pak 4 or

higher, Windows 2000, or Windows XP operatingsystem

• Temporary user access is required for initial system setupand configuration

Building Automation System Integration Choices• BACnet Ethernet• BACnet IP• Optional Modbus

Optional Integration Into Your Building Automation System of Choice

System Architecture

Communications• One 10/100 MB Ethernet, JR-45 connector:

- Direct connection - Intranet connection - Internet connection (requires an ISP connection)

• One, two-wire RS-485 port, non-isolated for dedicatedLONWORKS® network communication loop- McQuay MicroTech II air or water-cooled chillers- Optional MicroTech II Remote I/O Panel(s) for

input/output interface beyond onboard I/O capabilities(See MicroTech II Remote I/O Panel documentationfor specification data.)

• Optional internal auto-dial/auto-answer 56k modem; RJ-11 connector

Agency Listings• UL 916 • FCC part 15 Class A

Onboard Inputs and Outputs• 8 form C (SPDT) relay outputs rated for 24 VAC/DC @

2 Amps resistive; LED for each relay• 16 universal inputs for Type 3 (10k) thermistor, 4/20 mA

current loop, 0-10 volts, or dry contact- 12-bit A/D converter- Thermistor sensor range: -10° to 135°F (-23° to 57° C).

Accuracy = +/-1% of range- 0-10 volt or 4/20 mA accuracy = +/-2% of span

without user calibration. Uses an external resistor forcurrent input (four provided). Self powered or boardpowered sensors acceptable

- Dry contacts 20 Hz. Max. frequency. 3V open circuit,300-uA short-circuit current

- Board provides 20 VDC @ 80 mA to drive 4/20 mApowered sensors

• All I/O use screw terminals on 0.2” centers

Power Supply• 120 VAC or 240 VAC, 50/60 Hz.• 35 VA max.• Lead wires for hot/neutral (wire nut), stud for ground

connection

Battery Backup• Battery backup provided for all on-board functions• Battery is monitored and trickle charged• Battery maintains processor operation through power

failures for a pre-determined interval, then writes all datato flash memory, shuts processor down, and maintainsclock for a minimum of five years

Chassis• Intended for indoor wall mounting only• Cooling: internal air convection• Dimensions: 15.5” (39.4 cm) wide x 16.9” (42.8 cm) high

x 4” (10.2 cm) deep• Weight: net 16 lbs. (7.3 kg.) / gross 18 lbs. (8.2 kg.)

Environment• Operating temperature range: 0°to 50°C (32° to 122°F)• Storage temperature range: 0° to 70°C (32° to 158°F)• Relative humidity range: 5% to 95%, non-condensing

MicroTech II Chillers and/or Remote I/O Modules

ChillerSystem

Manager

Ethernet LAN(1) (BACnet® IP or BACnet Ethernet)

LONWORKS®

Optional MultipleUser Access(2)

Optional Modemto Remote PC(2)

Optional Modbus®

to BAS(3)

Optional InternetCapability(2)

Optional TemporaryUser Access(2)

Internet

(1) LAN not required for single Ethernet device interface.(2) Non-dedicated personal computer(s) with Microsoft Internet Explorer® version 5.0 or higher and Windows® 2000, XP, or NT 4.0 or higher operating system.(3) Optional Modbus available over RS-232 or RS-485 connection.

The CSM supports standard objects including chiller systemdata and individual MicroTech II chiller data for effectiveintegration with your BAS of choice.

Typical Integration Data

©2007 McQuay International (800) 432-1342 www.mcquay.com A/SP 31-187 (06/07)

®™ The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE, Modbus from Gould, Inc.; Internet Explorer and Windows NT from MicrosoftCorp.; Niagara Framework from Tridium, Inc.; MicroTech II from McQuay International; LONMARK and the LONMARK Logo are managed, granted, and used by LONMARK International under alicense granted by Echelon Corporation.

McQuay International reserves the right to change design and specifications without notice in support of continuous product and product data improvement.

Typical Chiller System Points (R=Read, W=Write)*Chilled Water Supply Temp (R)Chilled Water Return Temp (R)Leaving Condenser Water Temp (R)Entering Condenser Water Temp (R)Outside Air Temp (R/W)Decoupler Line Water Temp (R)Measured Flow Rate (R)Loop Differential Pressure (R)External Chilled Water Reset Signal (R)External Demand Limit Signal (R)Relative Humidity (R/W)Chiller Setpoint (to all chillers) (R)Decoupler Line Flow Rate (R)Cooling Load Pump VFD Speed (%) (R)Tower Bypass Valve Position (%) (R)Tower VFD Speed (%) (R)Loop Bypass Valve Position (%) (R)Demand Limit Setpoint (R/W)Cooling Tower Stage 1 Setpoint (R/W)Cooling Tower Valve Setpoint (R/W)Constant Approach Temp Differential (R/W)Loop Differential Pressure Setpoint (R/W)Low Ambient Lockout Setpoint (R/W)System Setpoint (R/W)Constant Return Setpoint (R/W)External Start/Stop (R)Chilled Water Reset Override (R)Cooling Load Pump (each pump) (R/W)Cooling Load Pump Status (each pump) (R)Schedule Input (R/W)Stage Up Inhibit (R/W)Clear CSM Alarms (W)CSM On/Off (R)Load Balancing Flag (R/W)Soft Load Flag (R/W)Cooling Tower On/Off (R/W)Free Cooling On/Off (R/W)Constant Approach Flag (R/W)Recirculate On/Off (R/W)Optimal Start Flag (R/W)Low Ambient Lockout Flag (R/W)

Typical Chiller System Alarms (R=Read, W=Write)*Cooling Tower Fail (R)Leaving Cond. Water Temp Sensor Fail (R)Entering Cond. Water Temp Sensor Fail (R)Chilled Water Flow (R)Communication Failure (each chiller) (R)Communication Failure (each Remote I/O Module) (R)Decoupler Flow Meter Fail (R)Chiller Off-line (R)Cooling Load Pump Fail (each pump) (R)Outside Air Temp Sensor Fail (R)Decoupler Temperature Sensor Fail (R)Return Chilled Water Temperature Sensor Fail (R)Supply Chilled Water Temperature Sensor Fail (R)Loop Differential Pressure Sensor Fail (R)Relative Humidity Sensor Fail (R)CSM Alarms (Multistate) (R)Chiller In Alarm (each chiller) (R)Stage Up Inhibit Has Restricted Enabling A Chiller (R)

Typical MicroTech II Chiller Points (Each MicroTechII Chiller) (R=Read, W=Write)*Active Chiller Setpoint (R)Actual Chiller Capacity (R)Chiller Run Mode (R)Chiller Capacity Limit (R)Chiller Evap. Leaving Water Temp. (R)Chiller Evap. Entering Water Temp. (R)Chiller Cond. Leaving Water Temp. (R)Chiller Evap. Entering Water Temp. (R)Chiller Evaporator Pressure (R)Chiller Cond. Saturated Refrigerant Temp. (R)Chiller Condenser Pressure (R)Chiller Cond. Saturated Refrigerant Temp. (R)Chiller On/Off (R)Chiller Run Enable/Disable (R)Chiller Evaporator Flow Switch Status (R)Chiller Condenser Flow Switch Status (R)Chiller Remote or Local Control (R)Chiller Limited (R)Chiller Alarm (R)Chiller System Alarms (for centrifugal chillers only) (W)

Typical MicroTech II Chiller Alarms (Each MicroTechII Chiller) (R=Read, W=Write)*Chiller Alarm Log (R) (BACnet only)

*Data available is dependent upon chiller type and/or options,and system configuration and/or installed devices.