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FORM
Accessories and Options
•CONTROL CIRCUIT TERMINAL STRIP – Provides power input terminals for field provided power input
in lieu of factory mounted control circuit transformer. 115V, 1∅ Control Circuit Power Terminal Strip lo- cated in the Microprocessor Panel to accept a field provided control power circuit with appropriate branch circuit protection in accordance with appli- cable Local and National codes. Provides unit con- trol circuit power, including supply to the 24V, fused Microprocessor panel transformer.
•BUILDING AUTOMATION SYSTEM (BAS) INTER- FACE – Provides means to reset the leaving chilled liquid temperature or percent full load amps (cur- rent limiting) from the BAS (Factory Mounted):
♦Printed circuit board to accept 4 to 20 milliamp, 0 to 10 VDC, or dry contact closure input from the BAS.
♦A YORK ISN Building Automation System can pro- vide a Pulse Width Modulated (PWM) signal di- rect to the standard control panel via the standard
•PRIMARY CHILLER POWER CONNECTIONS – See Electrical Data on pages 78 through 89 for spe- cific voltage and options availability. Separate ex- ternal branch circuit protection and disconnecting means must be supplied by others in accordance with applicable Local and National codes. (Factory Mounted)
âMultiple Point Supply – Standard field power wiring connection on all models is Multiple Point Power Connection to factory provided Terminal Blocks. Two field supplied electrical power circuits with appropriate branch circuit protection provide power to each of two motor control center cabi- nets, located adjacent to each other at one end of the chiller. Each cabinet contains starter elements for one or two compressors and their associated fan motor starters.
Optional to the Terminal Blocks for field power connection are
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Fused Disconnect Switch with external, lockable handle (in compliance with Article
♦
•STAR
•CONDENSER COIL PROTECTION – Standard con- denser coil construction materials include aluminum fins, copper tubes, and galvanized tube supports for generally good corrosion resistance. However, these materials are not adequate for all environments. The system designer can take steps to inhibit coil corro- sion in harsh applications and enhance equipment life by choosing from these options based on project design parameters and related environmental fac- tors. For additional application recommendations refer to Form
♦Black Fin Condenser Coils – Condenser coils constructed using black epoxy coated aluminum fin stock for corrosion resistance comparable to copper fin coils in typical seashore locations. Ei- ther this or phenolic (below) recommended for units installed in coastal environments.
♦Phenolic Coated Condenser Coils – Completed condenser coil assemblies are covered with a cured phenolic coating. Probably the best choice for seashore or where salt spray may hit the fins,
YORK INTERNATIONAL | 7 |