Air
Mechanical Specifications
RKNL-B Series
68
3. Liquid Propane (LP) Conversion Kit
a. Package shall contain all the necessary hardware and instructions to convert a standard natural gas unit for use with lique-
fied propane, up to 2000 ft (610m) elevation.
4. Flue Shield
a. Flue shield shall provide protection from the hot sides of the gas flue hood.
5. Condenser Coil Hail Guard Assembly
a. Shall protect against damage from hail.
b. Shall be louvered style.
6. Unit-Mounted, Non-Fused Disconnect Switch:
a. Switch shall be factory-installed, internally mounted.
b. National Electric Code (NEC) and UL approved non-fused switch shall provide unit power shutoff.
c. Shall be accessible from outside the unit.
d. Shall provide local shutdown and lockout capability.
7. Convenience Outlet:
a. Powered convenience outlet.
b. Outlet shall be powered from main line power to the rooftop unit.
c. Outlet shall be powered from line side or load side of disconnect by installing contractor, as required by code. If outlet is
powered from load side of disconnect, unit electrical ratings shall be UL certified and rated for additional outlet amperage.
d. Outlet shall be factory-installed and internally mounted with easily accessible 115-v female receptacle.
e. Outlet shall include 15 amp GFI receptacles with independent fuse protection.
f. Voltage required to operate convenience outlet shall be provided by a factory-installed step-down transformer.
g. Outlet shall be accessible from outside the unit.
h. Non-Powered convenience outlet.
i. Outlet shall be powered from a separate 115-120v power source.
j. A transformer shall not be included.
k. Outlet shall be field-installed and internally mounted with easily accessible 115-v female receptacle.
l. Outlet shall include 15 amp GFI receptacle with independent fuse protection.
m. Outlet shall be accessible from outside the unit.
8. Flue Discharge Deflector:
a. Flue discharge deflector shall direct unit exhaust vertically instead of horizontally.
b. Deflector shall be defined as a “natural draft” device by the National Fuel and Gas (NFG) code.
9. Propeller Power Exhaust:
a. Power exhaust shall be used in conjunction with an integrated economizer.
b. Independent modules for vertical or horizontal return configurations shall be available.
c. Horizontal power exhaust is shall be mounted in return ductwork.
d. Power exhaust shall be controlled by economizer controller operation. Exhaust fans shall be energized when dampers
open past the 0-100% adjustable setpoint on the economizer control.
10. Roof Curbs (Vertical):
a. Formed galvanized steel with wood nailer strip and shall be capable of supporting entire unit weight.
b. Permits installation and securing of ductwork to curb prior to mounting unit on the curb.
11. Universal Gas Conversion Kit:
a. Package shall contain all the necessary hardware and instructions to convert a standard natural gas unit to operate from
2000-7000 ft (610 to 2134m) elevation with natural gas or from 0-7000 ft (90-2134m) elevation with liquefied propane.
12. 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.
13. Indoor Air Quality (CO2) Sensor:
a. Shall be able to provide demand ventilation indoor air quality (IAQ) control.
b. The IAQ sensor shall be available in duct mount, wall mount, or wall mount with LED display. The set point shall have
adjustment capability.
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