Johnson Controls Duct R-410A, Technical Manual

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505429-JTG-L-0512
4 Johnson Controls Unitary Products
Condensing Unit Features and Benefits
Features
• Meets or exceeds ASHRAE 90.1 standards.
• Scroll compressors provide both high efficiency and
reliability.
• Simplicity
®
Controls
• Dual refrigerant circuits on J**PD and J**YD models.
• Condensing unit coils are constructed of reliable and
durable Micro-Channel aluminum tube and fins for long
lasting, efficient operation. Mirco-Channel technology
provides exceptional durability along with reduced
product weight and less refrigerant charge. Heat pumps
units are equipped with aluminum fin, copper tube coils
providing durability, reliability and value.
• Multiple condensing unit and air handler match-ups
provide a wide range of application choices from
oversized indoor motors to dual indoor units matched-
up with single outdoor units.
• Crankcase heaters that de-energize when compressors
are operating.
• Both high and low pressure controls. Since these
controls are self-contained, there are no capillary lines
to be damaged.
• Internal compressor motor protection.
• Class 2, 24-volt thermostat control circuit protected by a
re-settable breaker.
• Standard factory installed service valves.
• Filter-driers are shipped in the unit's control box for field
installation in the liquid line leaving the outdoor unit.
• Copper stub-outs are factory mounted on the suction
and liquid lines to simplify the field piping connections.
• Simplicity ® Controls provide stable cooling operation at
ambient temperatures down to 40°F with low ambient
kits available for operation to 0°F.
• Capacity staging for more economical operation and
stable temperature levels within the conditioned space.
• Simplicity ® Controls prevent the unit from cycling on
safety control with “Three Outs” technology preventing
nuisance trips, but protecting the equipment when valid
operational issues are experienced.
• Simplicity ® Controls monitor each safety independently
(High pressure, low pressure, low voltage) allowing
ease of troubleshooting if any problems arise.
• Inherently protected condenser fan motors.
• Technicoat or ElectroFin coated outdoor coils for sea
coast or corrosive environment applications.
• Factory installed disconnect to allow power to be
removed from the unit when performing periodic
maintenance or for service.
• Factory installed powered or non-powered 115 volt GFI
outlet.
• Factory installed phase monitor to protect the unit from
phase loss or phase reversal.
Benefits
The Series 20 condensing units and heat pumps can be
applied on a rooftop or at ground level... due to their ample
sub-cooling capacity which allows them to be located three or
more stories below the evaporator coil.
After assembly, the unit is pressurized with a combination of
Refrigerant R-410A and nitrogen for pressure testing and
additional leak testing. During this pressure test, the
operation of the high pressure control is checked. As the unit
is being evacuated and dehydrated, the operation of the low
pressure control is also checked.
Every compressor, condenser fan motor, crankcase heater,
and electrical control circuit is checked to assure a trouble-
free start-up and years of reliable operation. The condenser
fan guards are vinyl-coated to provide additional rust
protection and to enhance the appearance of the unit.
Compressors are mounted on rubber isolators to reduce the
transmission of vibration. Vertical discharge condenser fans
direct sound upward and away from any surrounding
structures.
All sheet metal parts are constructed of commercial grade
galvanized steel. After fabrication, each part is thoroughly
cleaned to remove any grease or dirt from its surfaces. The
external parts are coated with a powder paint to assure a
quality finish for many years. This UL approved coating
system has passed the 1000 hour, 20% salt spray test per
ASTM Standard B117.
All condensing unit and heat pump models include a 5-year
limited warranty on the compressor(s) and 1-year limited
warranty on all other parts. The matching line of air handling
units carries a 1-year limited parts warranty.
Outdoor Unit Accessories
Coil Guards: Wireform coil guards for added protection of
outdoor coils. Designed to mount on each side of the product
if required to provide protection from minor impacts or large
debris.
Hail Guards: Hood type hail guards designed to protect the
outdoor coils from hail. Can be installed on a single side or
both to provide protection from storms that may produce hail.
Low Ambient Kits: Kits designed to allow the cooling only
units to operate between 0°F and 40°F in the cooling mode.
Standard cooling is allowed to 40°F. (Not designed for
operation on heat pump units).
Air Handling Unit Features and Benefits
Features
These air handlers can be arranged for a variety of air
discharge patterns in either the horizontal or vertical position.
Refer to the unit installation instructions for other application
possibilities.