Volume-2 - Delhi Metro Rail Corporation

2.3 CHILLER SYSTEM MANAGER (CSM)
General:-
TENDER NO. DMRC/ELECT./IT&PD/ILBS/HVAC-LV-FF-02
The chiller supplier shall provide a chiller plant management system to perform chiller plant control,
automation, and energy management functions. The chiller plant control system shall have the
capability to monitor and control chillers, primary and secondary pumps, condenser water pumps,
cooling towers and motorized valves to provide the chiller plant operator with control, monitoring,
and management information.
The controller should features high-level algorithms and user interface. The controller should be
suitable for the management of 2- or 4-pipe systems, with regulation on one water circuit, for chiller
or heat pump units and relevant mode change-over, and also with regulation on two circuits, with
independent set-points and parameters, thus exploiting the simultaneous supply of chilled- and hot
water.
The controller should manage up to 10 chiller units, with activation logic focused at the balancing of
operation times and at the achievement of the highest energy efficiency. It should possible to define
conditions of dynamic stand-by and priority as regards the units activation. The alarm management
should be featured, with plain text descriptions and possible notification to remote recipients. There
are minimum two relay outputs should be available, associated to unit- and device alarms.
The multi-level menu should feature the language selection and differentiated access profiles (user
and maintenance).
The circuit temperatures and the status of both system- and unit- operation should be displayed, via
one overview page plus detailed pages.
The regulation can be based on proportional- or proportional + integral logics, or also on a dead-band
algorithm with dynamic adjustment, with relevant temperature inputs managed by the device.
The main Features should be, Set-point offset, outdoor temperature, demand limit should be
included, with relevant analog inputs.
System Hardware :-
The chiller plant control system shall consist of the following hardware:
Chiller Gateway – The BMS vendor should procure the gateway based on their protocol from chiller
vendor.
Field - mounted microprocessor - based chiller plant control panels BACnet compatible building
controller & PROGRAMMABLE CONTROL MODULES (Input/output controller). The Building
controller shall reside on a BACnet inter-network using the ISO 8802-3 (Ethernet or ARCNET
(ASTM 878.1) Physical/data link layer protocol. Each building controller shall perform routing to a
network of Custom Application and Application Specific Controllers. The Building controller shall
also be capable of residing on client's high speed network which supports Internet Protocol (IP). The
Building Controller shall use the Read (Initiate) and Write (Execute) Services as defined in Clauses
11.5 and 11.8, respectively, of ASHRAE Standard 135-95, to communicate with BACnet objects in
the internet work. Objects supported shall include: Analog input, analog output, binary input, binary
output and device.
PAGE No 21 of 204 Nov.2011