Product specifications

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6. Microcomputer Remote Monitoring Capabilities - shall include a complete Full Function
communication system through the following means:
a. PC Connection - shall provide communications to a 3.1 or higher level
Personal
Computer, or BMS (Building Automation System) to provide, as a minimum, the following:
1. Dynamic system data update of all outputs, inputs, control states, and alarms
2. Complete History Storage of all data needed for both Static and Dynamic graphing
3. Multiple Authorization Code Levels based on operator or full service authorization for
modification of setpoints and manual status
4. Capability of up to 20 Chiller Packages networked together via RS485 (up to 6000 feet)
b. (Remote Mounted-Stand Alone Control Terminal - shall communicate and control a single unit,
or network of up to twenty (20) units in a network, from a remote location up to 6000 feet away.
The RS485 communications port shall be wired with a 2 wire shielded cable for up to the 6000
feet away from the chiller, or 100 feet (30 meters) away through the RS232 communication
system via a (3) wire shielded cable).
1. This option utilizes a duplicate display and keypad Control Terminal, similar to the one that
shall be installed in the packaged chiller, or chiller network, and shall provide a full function
operating terminal.
2. This remote Control Terminal must be in addition to the unit mounted controller, so the unit
can be fully serviced locally, without using the Remote Control Terminal that may be as much
as 6000 feet away.
3. The remote communications shall be accomplished through the RS485 high speed
communications system up to 6000 feet (1829 meters) away, or the RS232 communication
system up to 100 feet away.
c. (Telephone Modem - for extended distance communications to a remote BMS System or a remote
PC Computer through the telephone system.)
1. A 14400 baud modem shall be connected directly to the RS232 port on the microcomputer.
2. The Modem Option shall be capable of operating a network of up to 20 units in the network,
connected via the RS485 port high speed communication system and a GATEWAY card, then
connected through the modem for extended network communications via the telephone
system.
d. (Communications to a Building Management System (BMS) - shall be connected to the packaged
chiller (or chiller network system) as follows for remote communication:
1. (A modem shall be connected to the RS232 communication port for long distance
communication through the telephone system, and a translator must be provided for
communication with the Building Management System.)
2. (The RS232 communication system shall be used for connection up to 100 feet (30 meters)
away from the chiller (or chiller network) when connected by a 4 wire shielded cable, and a
translator must be supplied for communication with the Building Management System.)
3. (The RS485 high speed communication system shall be connected up to 6000 feet (1829
meters) away from the packaged chiller (or chiller network) when connected with a 3 wire
shielded cable, and a translator must be supplied for communication with the Building
Management System.)
e. (Chiller Link Translator - shall be supplied for communication from the Chiller (or Chiller Network)(
to the BMS (Building Management System) through BACnet, MODBUS or Johnson Controls® N2
Bus communicating systems).
2.13 Starting Equipment
A. Unit mounted contactors with compressor motor module protection for each compressor.
B. Five (5) minute anti-recycle timer
C. (Non-fused disconnect switch with through-the-door interlocking handle.)
D. (Unit mounted power transformer to provide 115 VAC control power.)
E. (Multiple small horsepower compressors for reduced inrush starting.)
F. ( G r o u n d f a u l t i n t e r r u p te r. )
2.14 Additional Equipment
A. (Copper Fin/Copper Tube condenser coil.)
B. (Silicone polyester Poly-Coat condenser fin coating per ASME B117 specification for maximum salt spray
and corrosion resistance.)
C. (Convenience Outlet 115 volt AC powered dual 3 prong ground fault receptacle powered by dedicated
transformer and fused for 15 amps.)
D. (Hot gas bypass valve to permit operation down to 50% of unit mechanical unloading capability.)
E. (Low ambient control to 0°F (-17.8°C) minimum starting ambient.)
F. ( E x t r a l o w a m b i en t c o n t r o l t o - 2 0 ° F (- 2 8 ° C ) m i n i mu m s t a r t i n g a m b i e n t . )