Dual Pressure Relief Valves
Two safety valves in parallel of which one is operational
to assist in valve replacement during maintenance.
Suction Pressure Relief Valves
Additional pressure relief valve on suction side of
compressor when required.
PN16 Flanges
Welded PN16 flanges and companion flanges on the
water connections with gasket seals.
AVM (Resilient Pads)
Rubber anti-vibration pads underneath the unit to avoid
transmission of vibration to the plant room structure.
2.8 Nomenclature
AVM (Spring Isolators)
Spring and cage type isolators for mounting under the
unit base rails to avoid transmission of vibration to the
plant room structure (supplied loose with unit for field
assembly)
Water Filter
Field installed water filter at the cooler inlet to protect the
exchanger from excessive fouling.Wooden Crate
Special packing in a wooden crate to protect the chiller
from damages during transportation
Heat Pump Kit (YCSE only)
Capability to control the chiller based on the condenser
leaving water temperature.
2-3
035-21786-100 Rev. 1 (0909)
1 2 3 4 5 6 7 7 8 9 10 11
BASE PRODUCT TYPE NOMINAL CAPACITY UNIT DESIGNATOR / REFRIGERANT DESIGN SERIES
Y :York ###kW S : Standard Unit 50 : 380-415 / 3 / 50 + N
C : Chiller Standard Units B : R407C Refrigerant B : Design Level
S :S=Screw
:040 :050 :060
: R = Remote Air
:080 :100
Cooled Screw
E : European
YCSE100SB50B
VOLTAGE
Refigerant Flow Diagram
YCSE
Low-pressure liquid refrigerant enters the cooler and is evaporated and superheated by the heat energy absorbed
from the chilled liquid passing through the cooler plates. Low-pressure vapour enters the compressors where
pressure and superheat are increased. High pressure superheated refrigerant enters the condenser where heat is
rejected to the condenser water passing through the plates. The fully condensed and subcooled liquid leaves the
condenser and enters the expansion valve, where pressure reduction and further cooling takes place. The
low-pressure liquid refrigerant then returns to the cooler.
YCRE
Low pressure liquid refrigerant enters the cooler and is evaporated and superheated by the heat energy absorbed
from the chilled water passing through the cooler plates. Low pressure vapour enters the compressor where
pressure and superheat are increased. Heat is rejected by the remote condenser. The fully condensed and
subcooled liquid refrigerant then enters the expansion valve where pressure reduction and further cooling takes
place before returning to the cooler.
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