York YCAS0130 Program, Multiple Point Power Connection Standard, Control Circuit Terminal Block

Entry – Used to confirm Set Point changes, cancel inputs, advance day, and change AM/PM.

Setpoints – For setting chilled liquid temperature, chilled liquid range, remote reset temperature range.

Clock – Used to set time, daily or holiday start/stop schedule and manual override for servicing.

Print – Used to display or print operating data or sys- tem fault shutdown history for last six faults. Printouts through an RS-232 port via a separate printer.

Program

For setting low leaving liquid temperature cutout, 300 to 600 second anti-recycle timer, average motor current unload point, liquid temperature setpoint reset signal from YORK ISN or building automation system.

Additional functions (password protected) for pro- gramming by a qualified service technician:

Cutouts for low and high ambient, low suction pres- sure and high discharge pressure, refrigerant type, high discharge pressure unload setpoint.

ACCESSORIES AND OPTIONS

Multiple Point Power Connection (Standard)

Standard field power wiring connection on all models is Multiple Point Power Connection. Field provided power supply circuits, with appropriate branch circuit protection, are connected to factory provided terminal blocks, non-fused disconnect switches or circuit breakers with lockable external handles located in the two power compartments.

Single-Point Power Connection with Individual Circuit Protection

A single-point supply circuit with field provided pro- tection is connected to a factory provided terminal block or non-fused disconnect switch located in the options compartment. Factory wiring is provided from the ter- minal block or disconnect switch to factory supplied internal branch circuit breakers with lockable external handles in the power compartments.

FORM 201.19-NM1 (204)

Single-Point Power Connection with Combined Circuit Protection

A single-point supply circuit with field provided protection is connected to a factory provided circuit breaker with lockable external handle located in the options compartment. Factory wiring is provided from the circuit breaker to factory supplied terminal blocks in the power compartments.

Single-Point Power Connection without Circuit Protection

A single-point supply circuit with field provided pro- tection is connected to a factory provided terminal block or non-fused disconnect switch located in the options compartment. Factory wiring is provided from the ter- minal block or disconnect switch to factory supplied terminal blocks in the power compartments.

Control Circuit Terminal Block

A 120V, 20A control circuit power terminal strip located in the control panel to accept a field provided control power supply, rather than the standard factory mounted control circuit transformer. The supply with appropriate branch circuit protection in accordance with applicable Local codes, provides the unit control circuit power sup- ply via the panel mounted Emergency Stop Switch.

Building Automation System (BAS) Interface

Provides a means to reset the leaving chilled liquid tem- perature or percent full load amps (current limiting) from the BAS (Factory-mounted):

Printed circuit board to accept 4 to 20mA, 0 to 10VDC, or dry contact closure input from the BAS.

A YORK ISN Building Automation System can pro- vide a Pulse Width Modulated (PWM) signal direct to the standard control panel via the standard on-board RS485 port.

Condenser Coil Protection

The standard condenser coils have Aluminum fins, cop- per tubes, and galvanized steel supports for generally adequate corrosion resistance. However, these materials are not adequate for all environments.

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