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COMMUNICATIONS DEPARTMENT - Armstrong Pumps

By Marion Martinez,2014-09-26 09:37
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COMMUNICATIONS DEPARTMENT - Armstrong PumpsCOMM

GENERIC SPECIFICATION

    IPS Controller 9500

Mechanical and Electrical Details

    The Integrated Pumping System (IPS) pump logic controller shall be Armstrong IPS Controller 9500. The IPS pump logic controller shall be specifically designed for the control of multiple pump HVAC heating and/or chilled water systems that involve up to 6 variable speed primary pumps operating in parallel or in standby configuration. The IPS pump logic controller shall allow field adjustments of control parameters as described below.

    The IPS controller 9500 shall be capable of accepting and processing appropriate signals for the following dedicated terminal blocks:

    1. Up to 18 analog inputs (AI) for zone differential pressure (DP) transmitter signals 4-20 mA

    2. 1 AI for DP transmitter for primary pump run-out protection (if selected)

    3. 6 digital inputs (DI) for up to 6 primary pump DP switches

    4. 1 DI for system remote start/stop signal from BMS

    5. 5 DI’s for primary pump remote start/stop signals from up to 5 chillers

    6. 6 DI’s for VFD fault signals on up to 6 primary pumps

    7. 1 digital output (DO) for alarm horn (buzzer)

    8. 1 DI for alarm silencer

    9. 6 analog outputs (AO) for VFD speed signals on up to 6 primary pumps

    10. 6 DO’s for up to 6 primary pump run signals

    11. 4 DO’s for alarms:

    a. Pump/motor/VFD alarm,

    b. DP transmitter alarm,

    c. General system alarm,

    d. Primary pump fatal alarm

    12. 6 DO’s for up to 6 VFD automatic bypass run signals on primary pumps

    13. 6 AI’s from primary motor temperatures selectable between NTC or PT1000

    14. 6 DI’s from VFD run feedback signals on primary pumps

    15. 5 AI’s from primary and distribution flow measurement, kW, supply and return temperature sensors

    16. 1 serial port for communication with the BMS

    17. 1 serial port for communication with the VFD’s

    The IPS pump logic controller shall have an internal circuit breaker and run on 230/1/50 power supply. The logic controller shall be based on Flash style memory, older style EEPROM style memory is not acceptable.

    The IPS controller shall include a 10.4" back-lit touch-screen for all necessary user interface functions. Keypad based interfaces, LCD readouts and LED displays shall not be accepted. The IPS pump logic controller shall perform online self-diagnostic testing of the CPU(s), RAM and flash memory. No data shall be lost during power supply interruptions.

    The IPS pump logic controller shall have an IP54 rated cabinet. IP55 and IP65 are available as an option. The IPS controller shall have three levels of password security: one level for field adjustable parameters, a second for factory / commissioning setup parameters and a third for BMS communication commissioning.

The IPS complies with the requirements for the following harmonised standards:

    ; Safety requirements for Low Voltage Switchgear & Controlgear Assemblies; BS EN 60439-1 (1999) ; Electromagnetic Compatibility (EMC) Part 6-3: Generic Standard;

     Electromagnetic Compatibility (EMC) Emission Standard for Residential,

     Commercial & Light-Industrial Environments.

     BS EN 61326 Industrial, BS EN 55022, BS EN 55011, BS EN 61000-6-3 (2007)

     Armstrong Integrated Limited S. A. Armstrong Limited Wenlock Way 23 Bertrand Avenue

     Manchester Toronto, Ontario

     United Kingdom, M12 5JL Canada, M1L 2P3 T: +44 (0) 8444 145 145 T: 416-755-2291

     F: +44 (0) 8444 145 146 F: 416-759-9101 ? S.A. Armstrong Limited 2011

    Page 1 of 2

; Electromagnetic Compatibility (EMC) Part 6-2 : Generic Standard;

     Electromagnetic Compatibility (EMC) Immunity Standard for Industrial Environments.

     BS EN 61326 Industrial, BS EN 61000-6-2 (2005)

    The IPS conforms with the provisions of the following European Directives:

    ; Low Voltage Directive: 2006/95/EC

     including all current amendments thereof.

    ; Electromagnetic Compatibility (EMC) Directive: 2004/108/EC

     including all current amendments thereof.

Performance and Operating Logic

    The IPS pump logic controller shall determine the most efficient combination of operating variable speed primary pumps and pump operating speed based on the zone DP sensor signals and based on the operating chillers or boilers. The IPS Controller 9500 pump logic controller shall respond to the most dissatisfied zone by increasing either, the number of operating primary pumps, or the primary pump speed. In the case where all zones are satisfied the IPS pump logic controller shall respond by decreasing either, the number of operating pumps, or the pump speed so as to optimize the energy efficiency of the pumping operation while meeting system demands.

    The IPS Controller 9500 shall be capable of receiving up to 6 remote start/stop signals from operating chillers, boilers or from BMS. These signals shall operate the primary pumps available for the primary circuit whether they are dedicated or headered to the chillers or boilers. In the headered configuration the controller shall, through a signal from the lead chiller, boiler or BMS, start the lag primary pump in case the lead primary pump has failed. Also the controller shall alternate automatically the primary pumps based on hours of operation. Variable speed primary pumps shall be operated at speeds to achieve the lowest kW draw or highest wire-to-water efficiency of the pumping system while maintaining the system demand with the required number of chillers or boilers operating at the same time.

    The IPS pump logic controller shall continuously monitor all zone signals to determine an active control zone. Use of a multiplexer for multiple sensor inputs is not acceptable. To prevent un-necessary changes to the operating pump speed, to become the active control zone, the candidate zone must have a greater error from setpoint than the current active control zone for greater than 5 minutes. This transition delay period, 5 minutes, shall be a password protected field adjustable parameter that can be altered by the user.

    The IPS pump logic controller shall alternate the primary pumps based on a field adjustable interval of operating hours with a “bumpless” transfer algorithm. The logic controller shall incorporate embedded logic to prevent hunting, pump flow surge and motor overloading. The logic shall incorporate an adjustable PID control loop. PID control at the VFD is not acceptable.

    Should one VFD/pump/by-pass unit fail, the appropriate alarm signal shall be activated. The standby VFD/pump unit shall be operated in variable speed mode. If the system demand is too great with the standby on VFD the IPS pump logic controller shall send (if enabled during commissioning) an automatic by-pass signal to each VFD/by-pass assembly to operate in by-pass.

    The IPS controller shall have Hand-Off-Automatic (H-O-A) control for each variable speed primary pump. The virtual H-O-A switch shall be accessible through the HMI and pump speed could be controlled manually or automatically using the PID loop in the controller.

    The IPS pump logic controller shall provide a data logging feature including alarms and events (adjustment to system parameters). The IPS pump logic controller shall offer the option for expanded memory of 4 megabytes for a rolling record of system parameters at 10 second intervals, with a time stamp.

    The IPS pump logic controller shall be self-prompting. All messages shall be displayed in plain English. The operator interface shall have: multi-fault memory and recall, on-screen help functions and separate user screens for:

     Armstrong Integrated Limited S. A. Armstrong Limited Wenlock Way 23 Bertrand Avenue

     Manchester Toronto, Ontario

     United Kingdom, M12 5JL Canada, M1L 2P3 T: +44 (0) 8444 145 145 T: 416-755-2291

     F: +44 (0) 8444 145 146 F: 416-759-9101 ? S.A. Armstrong Limited 2011

    Page 2 of 2

     Zone setup including set-point and calibration of DP sensor range

     Primary pump setup including pump staging strategy (wire-to-water BEP, pump BEP and % pump speed)

     DP, flow, kW and temperature sensors setup

     BEP speed setup

     PID control parameters setup

     BMS communication setup

     Design set-point and end-of-curve data setup

     Alarm history and event review

     Display of zone, pump and system overview

     Display of system schematic showing operating primary pumps and operating parameters

     Factory default / commissioning setup data

    The IPS Controller shall be capable of staging and de-staging operating primary pumps to yield the best wire-to-water efficiency of the hydronic system (requires optional DP and flow sensors). This can be either done by receiving the VFD output kW consumption or by using a kW transmitter. Also the Controller shall be capable of displaying the wire-to-water efficiency continuously.

    The IPS controller shall be capable of both hard-wired and serial communications with the BMS using BACnet, Modbus, LonWorks, Trend and Metasys as standard protocols. The IPS controller shall offer the option of a gateway to communicate using TCP/IP protocol.

    The IPS pump logic controller shall automatically disable any zone differential pressure signals that are not within limits and alert the operator of a possible transmitter failure. Should all sensors fail or system failure be detected the primary pump speed will default to a pre-defined percent of full speed (factory default loaded as 90% of full speed). The IPS pump logic controller shall have a minimum speed limit entered as a field adjustable parameter (factory default loaded at 30% of full speed).

     Armstrong Integrated Limited S. A. Armstrong Limited Wenlock Way 23 Bertrand Avenue

     Manchester Toronto, Ontario

     United Kingdom, M12 5JL Canada, M1L 2P3 T: +44 (0) 8444 145 145 T: 416-755-2291

     F: +44 (0) 8444 145 146 F: 416-759-9101 ? S.A. Armstrong Limited 2011

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