Air Makeup
RDCA
Options
Cabinet:
• Dedicated 100% outside
air intake and filter transition (provides uniform filter and cooling coil
loading) OR dedicated mixed air intake cabinet (both outside air intake
and upflow return air opening)
• Outside air intake hood
with 1" permanent pre-filters
Filters:
• 2" or 4" pleated (25-40%
average efficiency)
• 2" permanent (filter rack
is field convertible for both filter sizes)
Cooling Section:
• Coil designs for both
humid and dry climate applications
Reheat Section:
• Series reheat (sub-cooling
condenser) recovery with medium and high cooling demand (model RDCA with
sub-cooling reheat option)
Heat Section:
• 316 stainless steel
• Furnace sizes of 100,
150, 200, 250 and 300 MBH input
• Propane gas
• Modulation option, 6:1
turndown (natural gas only)
Condensers:
• Dry climate applications
(e.g. Southwest U.S.) - high ambient to 125°F
Refrigerant Controls:
• Hot gas bypass options
on two lead circuits
Blower Motors:
• Totally enclosed or premium
efficiency (RDCA only)
Inlet Air Dampers:
• 100% outside air opening
located and sized to provide optimum air distribution across filters and
coils, equipped with damper with 2-position motor (open/closed)
• Motorized outside air
and return air dampers with multi-position options and remote selectors
• Motorized outside and
return air dampers to maintain building pressure in return air applications
• Special control configurations
for emergency sequences
Roof Curb:
• 14" high, insulated 16-gauge
roof curb with integral supply and return air duct connections
Disconnect Switch:
• NEMA 3 rated lockable,
non-fusible, indoor/outdoor disconnect switch
Convenience Outlet:
• 115 volt (20 amp, field-wired)
phase loss protection:
• Monitor shuts down system
if phase is reversed or lost. Protects scroll compressor from reverse rotation
during startup if phase is reversed from the factory setting.
Controls:
• Optional room override
humidistat
• Optional room override
temperature dial
• Optional timeclock DDC
interface card
• Optional N2 Open Network
Building Automation System (BAS) Interface Card
Warranty:
• Optional four-year extended
warranty on the compressors
• Optional four- or nine-year
extended warranty on the gas-fired heat exchanger
2 - 20 ton
cooling capacity
800 - 4600 CFM
100 - 300 MBH optional heating,
TCORE2 ® combustion system (patent pending)
208/230/460/575 volts 3
phase (Note: 575V limited to model RDCA with more than 6.5 tons of cooling)
130 - 800 CFM/ton
Up to 5 BHP blower motor
Reznor® packaged cooling
and cooling makeup air systems are available as model series RDCA.
The RDCA series packaged
direct expansion rooftops are designed to cool, dehumidify and heat high
outside air year round for makeup air and ventilation applications. These
rooftop systems include the same approaches to outside air treatment found
in field engineered or split systems.
The RDCA unit is designed
to provide an average cooling supply air temperature of 50° to 55°F
in humid to temperate climates and 60° to 75°F in dry (e.g. Southwestern
U.S.) climates. When specified with a gas heat section, the indirect fired
gas furnace can provide a staged or modulated temperature rise up to 100°F.
> Standard Features > Optional
Features
Capacity Steps:
• Standard 3-stage gas heating
and cooling/dehumidification in 1/3 incremental steps to minimize temperature
swing and improve operating reliability
Cabinet:
• Double-wall insulated
cabinet with outer casing of G90 galvanized steel substrate with 60 gloss
painted finish coat
• Hinged service panels
(double wall construction and gasketed)
• Dedicated downflow configuration
for rooftop application (reduced size and weight)
• "Z" channel base rail
design (reduces unit weight and provides structural integrity)
Filters:
• Standard with filter rack
field convertible for both filter sizes
Cooling Section:
• Removable stainless steel
condensate drain with minimum 1/8" per foot slope for positive drainage
• Multiple cooling coil
pressure drop conforms to less than 0.75" w.c. at 500 FPM
Heat Section:
• Gas heating with minimum
80% thermal efficiency
• Temperature rise 45-100°F
• 409 stainless steel
• Furnace sizes of 100,
150, 200, 250 and 300 MBH input
• Power vented
• 80% thermal efficient
• Natural gas
• Intermittent spark ignition
• Design certified to meet
ANSI Z83.9
Blowers:
• Slide-out fan system -
forward curve, belt drive, adjustable sheave
• Class I blowers
Condensers:
• Single-phase fan motors
– open drip with slinger
• Internal overload protection
• Dry climate applications
(e.g. Southwest U.S.) - high ambient to 125°F
Refrigerant:
• Factory charged - R22
Compressors:
• Scroll compressor design
with internal motor overload protection
• Each unit is equipped
with standard phase loss and reversal protection
Refrigerant Controls:
• External low pressure
cutouts, liquid line filter dryers, TXV’s, cooling coil frost protection
Low Ambient Cooling:
• Down to 55°F dewpoint
with 100% outside air and 60°F operating condenser ambient
Blower Motors:
• EPACT open dripproof
Disconnect Switch:
• Through-the-panel, lockable,
non-fusible, indoor/outdoor disconnect switch
Controls:
• Solid state DDC control
package for enhanced system operation and performance standard
Warranty:
• One-year parts warranty |
