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(6.) Outlet shall include a field installed “Wet in Use” cover.
14. Flue Discharge Deflector (04--14 sizes only):
a. Flue discharge deflector shall di rect unit exhaust vertically instead of horiz ontall y.
b. Deflector shall be defined as a “natural draft” device by the National Fuel and Gas (NFG) code.
15. Thru--the--Base Connectors:
a. Kits shall provide connectors to pe r mit ga s and elec trical connections to be brought to the unit through the
unit basepan.
b. Minimum of four connection loc ations per unit.
16. Supply Duct Cover: (16 size only.)
a. Required when field convert ing the factory standard vertic al duct supply to horizontal duct supply configur-
ation. One required per unit.
17. Propeller Power Exhaust:
a. Power exhaust shall be used in conjunct ion with an integrated economizer.
b. Independent modules for vertical or horizontal re turn configura tions shall be avail able.
c. Horizontal power exhaust is shall be mounted i n return duct work.
d. Power exhaust shall be controlled by economizer controller operation. Exhaust fans shall be energize d when
dampe rs ope n past the 0--100% adjustable setpoint on the economizer control.
18. Roof Curbs (Vertical):
a. Full perimeter roof curb with exhaust capability providing separate air streams for energy recovery from the
exhaust a ir without supply air contamination.
b. Formed galvanized steel with wood nailer strip and shall be capable of supporting entire unit weight .
c. Permits installation a nd securing of ductwork to curb prior to mounting unit on the curb.
19. High Altitude Gas Conversion Kit:
a. Package shall contain all the nece ssary hardwa re and instructions to conve rt a standa rd natural gas unit to
operate from 2000--7000 ft (610 to 2134m) elevation with natural gas or from 0--7000 ft (90--2134m) eleva-
tion with liquefied propane.
20. Outdoor Air Enthalpy Sensor:
a. The outdoor air enthal py se nsor shall be used to provide single enthalpy control. When used in conjunction
with a return air enthalpy sensor, the unit will provide differential ent halpy control. The sensor allows the
unit to determine if outside air is suitable for free cooling.
21. Return Air Enthalpy Sensor:
a. The return air enthalpy sensor shall be used in conjunction with an outdoor air enthalpy sensor to provide
differential enthalpy control.
22. Indoor Air Quality (CO
2
)Sensor:
a. Shall be able to provide demand ventilation indoor air quality (IAQ) control.
b. The IAQ sensor shall be avail able in duct mount, wall mount, or wall mount with LED display. The set-
point shall have adjustment capability.
23. Smoke det ectors (factory installed only):
a. Shall be a Four--Wire Controlle r and Detector.
b. Shall be environmental compensated with differential sensing for reliable, stable, and drift--free sensitivity.
c. Shall use magnet--activated test/reset sensor switches.
d. Shall have tool--less connection terminal access.
e. Shall have a recessed momentary switch for testing and resetting the detector.
f. Controller shall include :
(1.) One set of normally open alarm initiation contacts for connection to an initiating device circuit on a
fire alarm control panel.
(2.) Two Form--C auxiliary alarm relays for interface with rooftop unit or other equipment.
(3.) One Form --C supervision (trouble) relay t o control t he operat ion of the Trouble LED on a remote test/
reset station.
(4.) Capable of direct connection t o two individual detector modules.
(5.) Can be wired to up to 14 other duct smoke detectors for multiple fan shutdown applications
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