York YCIV - Power Supply;Connections; Protective Chiller Panels

JOHNSON CONTROLS78
FORM 201.23-EG2 (713)
data for last ten shutdown faults. Compressor suc-
tion,discharge,andoilpressuresandtemperatures,
suctionanddischargesuperheats,percentoffull-load,
operatinghours,starts,andanti-recycletimerstatus.
StatusMessagesformanualoverride,unitswitchoff,
compressor run, run permissive, remote controlled
shutdown,nocoolingload,daily/holidayshutdown,
anti-recycletimer.
E. Predictive Control Points:  Unit controls shall avoid
safetyshutdownwhenoperatingoutsidedesigncon-
ditionsbyoptimizingthechillercontrolsandcooling
loadoutputtostayonlineandavoidsafetylimitsbe-
ingreached.Thesystemshallmonitorthefollowing
parametersandmaintainthemaximumcoolingoutput
possible without shutdown of the equipment: motor
current,suctionpressureanddischargepressure.
F. SystemSafeties:Shallcauseindividualcompressor
systemstoperformauto-resetshutdown;manualreset
required after the third trip in 90 minutes. Includes:
highdischargepressureortemperature,lowsuction
pressure,high/lowmotorcurrent, highmotor tem-
perature,highpressureswitch,high/lowdifferentialoil
pressure,highoiltemperature,lowsuctionsuperheat,
criticalsensormalfunction,loworhighcurrent,phase
loss/singlephasepower,overloadofmotorwindings,
andlowvoltage.
G. Unit Safeties: Shall be automatic reset and cause
compressorstoshutdownif:highorlowambient,low
leavingchilledliquidtemperature,undervoltage,and
ow switch operation. Contractor shall provide ow
switch and wiring per chiller manufacturer require-
ments.
H. Manufacturer shall provide any controls not listed
above,necessaryforautomaticchilleroperation.Me-
chanicalContractorshallprovideeldcontrolwiring
necessaryto interface sensorstothe chiller control
system.
2.07 ACCESSORIES and OPTIONS
Someaccessoriesandoptionssupersedestandardprod-
uctfeatures.YourJohnsonControlsrepresentativewillbe
pleasedtoprovideassistance.
A.SoundReduction
1. Providethefollowingoptionsasrequiredtomeet
scheduledsound performancedataatallload
points.
a.Normalspeedfansandunlinedcompressor
enclosure.(Factory Mounted)
b.Two-speedfansandacousticalllylinedenclo-
sure.(Factory Mounted)
c. Soundpoweroctavebanddata,dBperAHRI
standard70andIAWISO3744at35°Cambi-
entand7°Cleavingchilledwater.
2. Provideoptionalcontrolinputtolimitsoundout-
putofthechillerbasedontimeofday.Shallbe
programmableatthechillerpanelorcontrolled
remotelyviasignal(4-20mAor0-10VDC)from
BASsystem.Chillerswithoutthisfeatureshall
beprovidedwiththenecessarysoundattenua-
tiontomeetthescheduledsoundperformance
dataatallloadpoints.
B.PowerSupply/Connections:
1. Circuitbreakerisoptionalatpointofincoming
single point connection to provide disconnect-
ingmeansANDbesizedtoprovidethemotor
branch circuit protection, short circuit protec-
tion and ground fault protection for the motor
branch-circuit conductors, the motor control
apparatusandthemotors.Circuitbreakershall
beequippedwithlockableoperatinghandlethat
shallextendthroughpowerpaneldoorsothat
powermaybedisconnectedwithoutopeningany
paneldoors.
C.CondenserCoilEnvironmentalProtection:
1. PRE-COATED FIN CONDENSER COILS –
 Theair-cooledcondensercoilsareconstructed
ofepoxy-coatedaluminumns.
2. COPPER FIN – Provide condenser coils with
coppernsinlieuofaluminumns.
3. POST-COATEDEPOXYDIPPEDCONDENSER
COILS –Theunitisbuiltwithdipped-curedcon-
densercoils.
D.ProtectiveChillerPanels(Factory Mounted):
1.Louvered Panels (condenser coils only): Painted
steeltomatchunitpanels,overexternalcondenser
coilfaces.
2.WirePanels(fullunit):Heavygauge,weldedwire
mesh, coated to resist corrosion, to protect con-
denser coils from incidental damage and restrict
unauthorizedaccesstointernalcomponents.
3. Louvered Panels (full unit): Painted steel to
match unit panels, to protect condenser coils
fromincidentaldamage,visuallyscreeninternal
components,andpreventunauthorizedaccess
tointernalcomponents.
4. Louvered/WirePanels:Louveredsteelpanelson
externalcondensercoilfaces,paintedtomatch
Guide Specications