Specifications
51JOHNSON CONTROLS
FORM 160.80-EG1 (511)
during chiller operation. The chiller shall ship with a 3
micron absolute oil lter, (two lters for dual lter option)
maintaining a clean oil system and ensuring superior
compressor life.
A 1500W immersion oil heater shall be provided and
temperature actuated to effectively remove refrigerant
from the oil. Power wiring to the Control Center shall be
factory installed. The oil cooler shall be refrigerant cooled
and factory piped, requiring no auxiliary water or refrig-
erant piping in the eld. An oil eductor shall be provided
to automatically remove oil which may have migrated to
the evaporator and return it to the compressor. The oil
separator shall be of a horizontal design with no moving
parts, and shall provide effective oil separation before the
refrigerant enters the heat exchangers. The oil separator
shall be designed, tested and stamped in accordance
with ASME Boiler and Pressure Vessel Code, Section
VIII – Division 1.
MOTOR DRIVELINE
The compressor motor shall be an open drip-proof,
squirrel-cage, induction type operating at 3570 RPM (2975
RPM for 50 Hz operation).
The open motor shall be provided with a D-ange, bolted
to a cast-iron adaptor mounted on the compressor to allow
the motor to be rigidly coupled to the compressor to pro-
vide factory alignment loof motor and compressor shafts.
Motor drive shaft shall be directly connected to the
compressor shaft with a exible disc coupling. Coupling
shall have all metal construction with no wearing parts
to assure long life, and no lubrication requirements to
provide low maintenance. For units utilizing remote elec-
tromechanical starters, a large steel terminal box with
gasketed front access cover shall be provided for eld
connected conduit. Overload/overcurrent transformers
shall be furnished with all units. (For units furnished
with factory packaged Solid State Starters, refer to the
“Options” section.)
EVAPORATOR
Evaporator shall be of the shell-and-tube, ooded type
designed for 300 psig (2069 KPa) working pressure on
the refrigerant side. Shell shall be fabricated from rolled
carbon steel plate with fusion welded seams; have carbon
steel tube sheets, drilled and reamed to accommodate the
tubes; and intermediate tube supports spaced no more
than four feet apart. The refrigerant side shall be designed,
tested and stamped in accordance with ASME Boiler and
Pressure Vessel Code, Section VIII – Division 1. When
required by the refrigeration safety code, the vessel shall
have a refrigerant relief device(s) set at 300 psig (2069
KPa). Tubes shall be high-efciency, internally enhanced
type. Each tube shall be roller expanded into the tube
sheets providing a leak-proof seal, and be individually
replaceable. Water velocity through the tubes shall not
exceed 12 FPS (3.6 m/s). Liquid level sight glass shall
be located on the side of the shell to aid in determining
proper refrigerant charge.
Water boxes shall be removable to permit tube clean-
ing and replacement. Stubout water connections having
ANSI/AWWA C-606 grooves shall be provided. Water
boxes shall be designed for 150 psig (1034 KPa) design
working pressure and be tested at 225 psig (1551 KPa).
Vent and drain connections with plugs shall be provided
on each water box.
CONDENSER
Condenser shall be of the shell-and-tube type, designed
for 300 psig (2069 KPa) working pressure on the refriger-
ant side. Shell shall be fabricated from rolled carbon steel
plate with fusion welded seams; have carbon steel tube
sheets, drilled and reamed to accommodate the tubes;
and intermediate tube supports spaced no more than four
feet apart. A refrigerant subcooler shall be provided for
improved cycle efciency. The refrigerant side shall be
designed, tested and stamped in accordance with ASME
Boiler and Pressure Vessel Code, Section VIII – Division
1. When required by the refrigeration safety code, the
vessel shall have a refrigerant relief device(s) set at 300
psig (2069 KPa). Tubes shall be high-efciency, internally
enhanced type. Each tube shall be roller expanded into the
tube sheets providing a leak-proof seal, and be individu-
ally replaceable. Water velocity through the tubes shall
not exceed 12 FPS.
Water boxes shall be removable to permit tube clean-
ing and replacement. Stubout water connections having
ANSI/AWWA C-606 grooves shall be provided. Water
Boxes shall be designed for 150 psig (1034 KPa) design
working pressure and be tested at 225 psig (1551 KPa).
Vent and drain connections with plugs shall be provided
on each water box.
REFRIGERANT SYSTEM
The YS chiller is equipped with a refrigerant metering
device consisting of a xed orice and solenoid valve
controlled via the OptiView Control Center. This control
ensures proper refrigerant ow to the evaporator over a
wide range of operating conditions, including thermal stor-