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GUIDE SPECIFICATIONS — 542J150,180 UNITS (cont)
15. Power Exhaust Accessory:
Power exhaust shall be used to provide system
exhaust of up to 100% of return air. The power exhaust
is a field-installed accessory (vertical applications).
16. Outdoor Air Enthalpy Sensor:
The outdoor air enthalpy sensor shall be used with
the EconoMi$er device to provide single enthalpy
control. When used in conjunction with a return air
enthalpy sensor, the EconoMi$er device will provide
differential enthalpy control. The sensor allows the
EconoMi$er controller to determine if outside air is
suitable for free cooling.
17. Return Air Enthalpy Sensor:
The return air enthalpy sensor shall be used with the
EconoMi$er device. When used in conjunction with
an outdoor air enthalpy sensor, the EconoMi$er
device will provide differential enthalpy control.
18. Return Air Temperature Sensor:
The return air temperature sensor shall be used with
the EconoMi$er device. When used in conjunction
with the standard outdoor air temperature sensor,
the EconoMi$er device will provide differential tem-
perature control.
19. Ultra-Violet Germicidal Lamps:
Ultra-violet germicidal lamps are designed to elimi-
nate odor causing mold and fungus that may develop
in the wet area of the evaporator section of the unit.
The high output, low temperature germicidal lamps
are field installed in the evaporator section of the
unit, aimed at the indoor coil and condensate pan.
The short wavelength ultra-violet light inhibits and
kills mold, fungus and microbial growth. The lamps
have an output rating at 45 F in 400 fpm airflow of
120 microwatts/cm
2
at 1 meter.
20. Hinged Panel Option:
Hinged panel option provide hinged access panels
for the filter, compressor, evaporator fan, and control
box areas. Filter hinged panels permit tool-less entry
for changing filters. Each hinged panel is perma-
nently attached to the rooftop unit.
21. Emergency Heat Control Package:
When mechanical heating is locked out, auxiliary
heat shall be activated when necessary.
22. Glycol Coil:
Coil shall be 2-row copper tube (
1
/
2
-in. OD) with alu-
minum plate fins (15 fins/in.) and 1.625 in. OD cop-
per headers. Input and output connections shall be
1.625 in. ODM copper stubs for sweat connection.
Coil shall be furnished with suitable support rails,
end plates, and hardware for ready field installation
in the heater compartment.
23. Winter Start Time Delay:
Used in conjunction with the accessory low ambient
kit or head pressure control device, the kit permits
operation in cooling at lower outdoor temperatures.
See price pages for more information.
24. Alternate Drive:
Alternate drive shall provide higher static drive capa-
bility to enhance indoor fan performance rpm range.
25. Stainless Steel Condensate Pan:
Stainless steel condensate pans shall be available
for condensate collection.
50TFQ004-012
542J150,180