York R-407C Optimized, Руководство пользователя, Страница: 6 / 120

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YORK INTERNATIONAL
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YORK INTERNATIONAL
FORM 201.19-EG4
Specifications
(Continued)
Standards, and ASHRAE/ANSI-15 Safety Code
for Mechanical Refrigeration.
• Units are Rated and Certified in accordance with ARI
Standard 550/590-98.
• All exposed power wiring routed through liquid-tight,
non-metallic conduit.
MICROPROCESSOR CONTROLS:
• Controls housed in a powder painted steel enclosure,
equivalent to NEMA 3R/12 (IP55) powder painted steel
cabinet with hinged, latched, and gasket sealed, door
equipped with lockable, external emergency stop
switch.
• Liquid crystal 40 character display with text provided
on two lines and light emitting diode backlighting for
outdoor viewing.
• Color coded, 32 button, sealed keypad with sections
for Display, Entry, Setpoints, Clock, Print, Program
and Unit On/Off.
• Standard controls include: brine chilling or thermal
storage, automatic pump down, run signal contacts,
demand load limit from external building automation
system input, remote reset liquid temperature reset
input, unit alarm contacts, evaporator pump control,
automatic reset after power failure, automatic system
optimization to match operating conditions, software
stored in non-volatile memory (EPROM) to eliminate
chiller failure due to AC power failure. Programmed
setpoints retained in lithium battery backed RTC
memory for a minimum 5 years.
• DISPLAY – In English (°F and PSIG) or Metric (°C
and Bars) units, and for each circuit:
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Return and leaving chilled liquid, and ambient
temperature.
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Day, date and time. Daily start/stop times. Holiday
and Manual Override status.
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Compressor operating hours and starts. Auto-
matic or manual lead/lag. Lead compressor iden-
tification.
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Run permissive status. No cooling load condition.
Compressor run status.
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Anti-recycle timer and anti-coincident start timer
status per compressor.
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System suction (and suction superheat), discharge,
and oil pressures and temperatures.
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Percent full load compressor motor current per
phase and average per phase. Compressor ca-
pacity control valve input steps.
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Cutout status and setpoints for: supply fluid tem-
perature, low suction pressure, high discharge
pressure and temperature, high oil temperature,
low and high ambient, phase rotation safety, and
low leaving liquid temperature.
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Unloading limit setpoints for high discharge pres-
sure and compressor motor current.
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Liquid pull-down rate sensitivity (0.5°F to 5°F [0.3°C
to 3°C] minute in 0.1°F increments).
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Status of: evaporator heater, condenser fans, load
and unload timers, chilled water pump.
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“Out of range” message.
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Up to 6 fault shut down conditions.
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Standard Display Language is English, with
Options
for: French and Spanish.
• ENTRY – Enter setpoint changes, cancel inputs, ad-
vance day, change AM/PM.
• SETPOINTS – Chilled liquid temperature, chilled liquid
range, remote reset temperature range.
• CLOCK – Time, daily or holiday start/stop schedule,
manual override for servicing.
• PRINT – Operating data or system fault shutdown his-
tory for last six faults, and software version. Printouts
through an RS-232 port via a separate printer (by
others).
• PROGRAM –
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Low leaving liquid temperature cutout, 300 to 600
second anti-recycle timer, lag compressor start time
delay, average motor current unload point, liquid
temperature setpoint reset signal from YORK ISN
or building automation system (by others) via:
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Pulse width modulated (PWM) input for up to
40°F (22°C) total reset as standard.
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Optional
Building Automation System interface
input card for up to 40°F (22°C) reset using a:
4 to 20 milliamp, 0 to 10VDC input, or discrete
(dry contact) reset input. [ NOTE: The Standard
MicroPanel can be directly connected to a YORK
ISN Building Automation System via the standard
on-board RS485 communication port. This Op-
tion also provides open system compatibility with
other communications networks (BACNET™ &
LONMARK
TM
) via interface through standard 485
or 232 port and an external YorkTalk Trans-
lator .]
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Additional functions (password protected) for pro-
gramming by a qualified service technician:
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Cut-outs for low and high ambient, low suc-
tion pressure, high discharge pressure, high
oil temperature.
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Refrigerant type.