TYPICAL ROOF-TOP INSTALLATION
FIELD-INSTALLED ACCESSORIES
SINGLE INPUT ELECTRONIC ENTHALPY ECONOMIZER -
Includes a slide-in / plug-in damper assembly with fully
modulating spring return motor actuator capable of introducing
up to 100% outdoor air, one outdoor air electronic enthalpy
sensor and a rainhood with filters. The rainhood is painted to
match the basic unit and must be field-assembled before
installation. Economizer dampers are 2% low leakage type. The
fixed outdoor air damper (shipped as standard equipment with
every unit) can be used for barometric relief on units with an
economizer.
DUAL INPUT ELECTRONIC ENTHALPY ECONOMIZER -
Includes the same damper system and rainhood with filters as
described for a single enthalpy economizer above except this
accessory contains two enthalpy sensors. It uses a differential
enthalpy control that compares the outdoor air versus the return
air. The logic module then optimizes the economizer operation
for additional savings over the single input economizer. The
fixed outdoor air damper (shipped as standard equipment with
every unit) can be used for barometric relief on units with an
economizer.
MOTORIZED AIR DAMPER - Includes slide-in / plug-in damper
assembly with rainhood and filters. The outdoor air dampers open
when the indoor fan motor is energized. Damper capable of
providing 0% thru 100% of outdoor return air opening.
MANUAL OUTDOOR DAMPER - Provides 0% thru 35% or 0%
thru 100% of outdoor return air opening (field adjustable).
Designed for duct mounted side or bottom supply / return
applications. Includes both hood assembly and filters.
ROOF CURB
- This 14" high full perimeter roof curb is shipped
knocked down for field assembly and contains duct supports
and an insulated deck in the area under the unit’s outdoor
section.
ANTI-RECYCLE TIMER
- A timer to prevent unit compressors
from short cycling. It assures 5 minutes off time between
compressor cycles.
PROPANE CONVERSION KIT - Converts a gas-fired heater
from natural gas to propane. It contains main burner orifices, a
pilot orifice and a gas valve.
GAS PIPING - This kit contains 3/4" pipe nipples, fittings and
gas cock (including panel access gaskets) required for bottom
gas supply connection with external shut-off.
HIGH ALTITUDE CONVERSION (NATURAL AND PROPANE)
- Provides orifices for proper furnace operation at altitudes up
to 6,000 ft. For propane applications, the propane conversion
kit will also be required.
WALL THERMOSTAT - The units are designed to operate with
24-volt electronic thermostats. All units operate with two stage
heat / two stage cool thermostats (with or without an
economizer).
511.17-TG2Y
14
Unitary Products Group
