Filter
Top Products
RT-PRC017-EN54
Mechanical
Specifications
General
Units shall be convertible airflow.
Operating range in cooling shall be
between 46°C and -18°C (115°F and 0°F)
cooling as standard from the factory for
all units. All units shall be factory
assembled, internally wired, fully
charged with R-22, and 100 percent run-
tested before leaving the factory. Wiring
internal to the unit shall be colored and
numbered for simplified identification.
Casing
Unit casing shall be constructed of zinc
coated, heavy gauge, galvanized steel.
Exterior surfaces shall be cleaned,
phosphatized, and finished with a
weather-resistant baked enamel finish.
Cabinet construction shall allow for all
maintenance on one side of the unit.
Service panels shall have lifting handles
and be removed and reinstalled by
removing only a single fastener while
providing a water and air tight seal. All
exposed vertical panels and top covers
in the indoor air section shall be
insulated with a cleanable foil faced, fire-
retardent permanent, odorless glass
fiber material. The base of the unit shall
be insulated with 13 mm, 16 kg (1/2 inch,
1 pound) density foil-faced, closed-cell
material. All insulation edges shall be
either captured or sealed. The unit’s base
pan shall have no penetrations within
the perimeter of the curb other than the
raised 29 mm (1
1
/8 inch) high downflow
supply/return openings to provide an
added water integrity precaution, if the
condensate drain backs up. The base of
the unit shall have provisions for forklift
and crane lifting, with forklift capabilities
on three sides of the unit.
Evaporator And Condenser Coils
Internally finned, 8 mm (5/16”) copper
tubes mechanically bonded to a
configured aluminum plate fin shall be
standard. Coils shall be leak tested at the
factory to ensure pressure integrity. The
evaporator coil and condenser coil shall
be leak tested to 1375 kPa (200 psig) and
pressure tested to 3100 kPa (450 psig).
The condensate coil shall have a patent
pending 1 +1+1hybrid design with slight
gaps for ease of cleaning. A removeable,
reversible, double-sloped condensate
drain pan is standard. Provision for
through the base condensate drain is
standard.
Gas Heating Section
The heating section shall have a
progressive tubular heat exchanger
design using stainless steel burners and
corrosion resistant steel throughout. An
induced draft combustion blower shall be
used to pull the combustion products
through the firing tubes. The heater shall
use a direct spark ignition (DSI) system.
On initial call for heat, the combusiton
blower shall purge the heat exchanger
for 20 seconds before ignition After three
unsuccessful ignition attempts, the entire
heating system shall be locked out until
manually reset at the thermostat/zone
sensor. Units shall be suitable for use with
natural gas or propane (field-installed kit).
Outdoor Fans
The outdoor fans shall be direct-drive,
statically and dynamically balanced,
draw-through in the vertical discharge
position. The fan motor shall be
permanently lubricated and shall have
built-in thermal overload protection.
Unit Top
The top cover shall be one piece
construction or, where seams exist, it
shall be double-hemmed and gasket-
sealed. The ribbed top adds extra
strength and prevents water from
pooling on unit top.
Filters
25 mm (1 inch), throwaway filters shall
be standard on all 5 ton units.. The filter
rack can be converted to two inch
capability. 50 mm (2 inch) filters shall be
factory supplied on all 6-10 ton units.
Optional two inch pleated filters shall be
available.
Compressors
All units shall have direct-drive,
hermetic, scroll type compressors with
centrifugal type oil pumps. Motor shall
be suction gas-cooled and shall have a
voltage utilization range of plus or minus
10 percent of unit nameplate voltage.
Internal overloads shall be provided with
the scroll compressors. Low and high
pressure switches shall be standard.
Refrigerant Circuits
Service pressure ports, and refrigerant
line filter driers shall be factory-installed
as standard. An area shall be provided
for replacement suction line driers.