Technical Guide

HIGH-EFFICIENCY

WATER SOURCE HEAT PUMPS AND WATER COOLED

AIR CONDITIONERS

HORIZONTAL & VERTICAL MODELS 1/2 - 5 TONS

359583-YTG-B-0208

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.