Table 2: Wiring diagram legend
Label Description
HGBP Hot gas bypass
HPCO High pressure cutout
K13, K14, K17 Relays mounted on I/O board. Refer to the operations manual Form 161.01-OM1.
L1 Inductor 4 A, 9 mH (460 VAC) or 8 A, 3 mH (230 VAC)
LCWT Leaving chilled water temperature
LLS Liquid level sensor (probe)
MBC Magnetic bearing controller
MOV Metal oxide varistor
MWT Motor winding temperature
OVA Cond. level control actuator
RES Resistor
Resistance temperature sensing element
Transient supressor
Terminal block, factory wiring
Terminal block, field connection
TB6 Terminal block, field (botttom), factory (top)
TB7 Terminal block, field (botttom), factory (top)
UPS Uninterruptible power supply
VGD Variable geometry diffuser
VSOP Variable speed oil pump
xSOL Solenoid valve
Field wiring
Factory wiring
Circuit board or enclosure boundary
Jack (J1, J2,…)
Plug (P1, P2, …)
Wire entrance hole in control panel
Option (as and when supplied) by YORK
Mechanical linkage
Shielded cable
Metal oxide varistor
Terminal located in starter (TB1 or 1TB)
Note: Drawing number: 035-26662-000 REV E, SHT. 5
9Unit Wiring and Field Connections for YZ Centrifugal Chiller with Magnetic Bearing Controller
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