York YCIV0157E/V, Manual

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JOHNSON CONTROLS
FORM 201.23-EG1 (1013)
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alloy fins with full height collars. Subcooling coil
an integral part of condenser. Design working
pressure shall be 450 psig (31 barg).
2. Low Sound Fans: Shall be dynamically and stati -
cally balanced, direct drive, corrosion resistant
glass fiber reinforced composite blades molded
into low noise, full airfoil cross section, provid -
ing vertical air discharge from extended orifices.
Guards of heavy gauge, PVC (polyvinyl chloride)
coated or galvanized steel.
3. Fan Motors: High efficiency, direct drive, 3-phase,
insulation class “F”, current protected, Totally
Enclosed Air Over (TEAO), with double sealed,
permanently lubricated ball bearings.
2.05 POWER AND ELECTRICAL REQUIREMENTS
A. Power/Control Panel:
1. NEMA 3R (IP55), powder painted steel cabi -
nets with hinged, latched, and gasket sealed
outer doors equipped with wind struts for safer
servicing. Provide main power connection(s),
compressor starters and fan motor contactors,
current overloads, and factory wiring.
2. Panel shall include control display access door.
B. Single Point Power (As standard for 2 and 3 compres -
sor chillers)
1. Provide single point power connection to chiller,
shall be 3 phase of scheduled voltage.
2. Terminal Block connections shall be provided at
the point of incoming single point connection.
C. Control Transformer: Power panel shall be supplied
with a factory mounted and wired control transformer
that will supply all unit control voltage from the main
unit power supply. Transformer shall utilize scheduled
line voltage on the primary side and provide 115V/1Ø
on secondary.
D. Short Circuit Withstand Rating of the chiller electrical
enclosure shall be (380, 400, & 460V: 65,000 Amps).
Rating shall be IAW UL508.
E. Motor Starters: Motors starters shall be reduced inrush
type (Wye-Delta or Solid State) for minimum electrical
inrush. Across the line type starters will not be accept -
able.
F. Power Factor:
1. Provide equipment with power factor correction
capacitors as required to maintain a displace-
ment power factor of 95% at all load conditions.
2. The installing contractor is responsible for ad-
ditional cost to furnish and install power factor
correction capacitors if they are not factory
mounted and wired.
G. Exposed compressor and fan motor power wiring shall
be routed through liquid tight conduit.
2.06 CONTROLS
A. General:
1. Provide automatic control of chiller operation
including compressor start/stop and load/unload,
anti-recycle timers, condenser fans, evaporator
pump, evaporator heater, unit alarm contacts and
run signal contacts.
2. Chiller shall automatically reset to normal chiller
operation after power failure.
3. Unit operating software shall be stored in non-
volatile memory. Field programmed set points
shall be retained in lithium battery backed regu -
lated time clock (RTC) memory for minimum 5
years.
4. Alarm contacts shall be provided to remote alert
for any unit or system safety fault.
B. Display and Keypad:
1. Provide minimum 80 character liquid crystal
display that is both viewable in direct sunlight
and has LED backlighting for nighttime viewing.
Provide one keypad and display panel per chiller.
2. Display and keypad shall be accessible through
display access door without opening main con -
trol/electrical cabinet doors.
3. Display shall provide a minimum of unit setpoints,
status, electrical data, temperature data, pres -
sures, safety lockouts and diagnostics without
the use of a coded display.
4. Descriptions in English (or available language
options), numeric data in English (or Metric)
units.
5. Sealed keypad shall include unit On/Off switch.
C. Programmable Setpoints (within Manufacturer limits):
display language; leaving chilled liquid temperature:
setpoint, control range; local or remote control; units of
measure; compressor lead/lag; and maximum chilled
water setpoint reset temperature range.
D. Display Data: Chiller liquid return and leaving tempera-
tures, ambient, lead compressor identification, clock
and schedule, (variable) out of range, remote input
indication, chilled liquid reset setpoint, and history