359583-YTG-B-0208
TECHNICAL GUIDE
HIGH-EFFICIENCY
WATER SOURCE HEAT PUMPS
AND WATER COOLED
AIR CONDITIONERS
HORIZONTAL & VERTICAL MODELS
1/2 - 5 TONS
GENERAL
All Models 1/2 - 5 tons ship as factory-charged packages.
Horizontal units are designed for suspended ceiling mount-
ing. Horizontal models are shipped with ‘straight-through’
evaporator fan discharge as standard. Fan orientation is
field convertible to side discharge. Vertical units are
designed for free-standing floor mounting. All units are
completely factory wired and pre-piped. Water supply,
water outlet, and condensate drain connections are via
female pipe thread fittings.
CABINET
All cabinets are completely constructed of 18 Ga. corrosion
resistant “Galvalume” coated steel. The horizontal units are
complete with integral hanger channels. The entire unit
interior (both evaporator and condensing section) is insu-
lated with 1/2” thick, 2 lb. density insulation. Service panels
are equipped with lifting handles for ease of removal and
handling. All units provide excellent service access to the
reversing valve, thermal expansion valve, and compressor
with the unit remaining in location. An integral duct collar is
provided on the blower discharge opening. An optional dis-
charge plenum is available for Vertical models.
REFRIGERANT CIRCUITS
All models utilize hermetic rotary or reciprocating type com-
pressors. Compressors are mounted on rubber isolators to
minimize vibration transmission. Internal overload protec-
tion is provided. External high pressure and low pressure
cutout switches are included in each compressor control
circuit. Each refrigeration circuit includes an adjustable bi-
flow thermal expansion valve (with external equalizer),
bi-flow liquid line filter drier, and service gauge ports. The
reversing valve is a pilot operated, sliding piston type with a
replaceable magnetic solenoid coil.
The refrigerant-to-air heat transfer coils are constructed of
internally enhanced copper tubes mechanically bonded to
enhanced aluminum plate fins. The evaporator coil is
employed in a draw-through configuration. Large evapora-
tor coil face area minimizes potential water blow-off.
The coaxial refrigerant-to-water heat exchangers feature a
convoluted inner tube design for high heat transfer effi-
ciency. Standard models feature a copper inner tube sur-
rounded by a steel outer tube, and carry a 400 psig water
side working pressure rating.
