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GUIDE SPECIFICATIONS — 581A210-300 UNITS (cont)
11. Non-Fused Disconnect Switch:
Switch shall be factory-installed, internally mounted,
NEC and UL approved. Non-fused switch shall pro-
vide unit power shutoff. Shall be accessible from out-
side the unit and shall provide power off lockout
capability.
12. Hail Guard, Condenser Coil Grille:
Grille shall protect the condenser coil from hail, flying
debris, and damage by large objects without increas-
ing unit clearances.
13. Horizontal Kit:
Horizontal kit shall contain all the necessary hard-
ware to convert a vertical airflow unit to a horizontal
airflow unit.
The unit shall also be available as a horizontal air-
flow unit directly from the factory.
14. Return Air Smoke Detector:
The smoke detector shall send input to the controller
to shut down the unit in case smoke is detected. The
smoke detector shall be factory installed in the return
air section or shall be available as a field-installed
accessory.
15. Two-Position Damper:
The damper shall admit up to 25% outdoor air and
shall close upon shutdown. The package shall
include a single-blade damper and motor.
16. Manual Damper:
The damper shall have a manually adjustable out-
side air intake for up to 33% outside air.
17. 30% Filters:
The filters shall be 30% efficient. The filters shall be
2-in., pleated filters.
18. Standard Motor with Alternate Drive:
The alternate drive shall provide high-static drive
capability to enhance evaporator fan performance.
19. Alternate Motor with Standard Drive:
The alternate motor shall provide high-static motor
capability to enhance evaporator fan performance.
20. Alternate Motor with Optional Drive:
The alternate motor and optional drive shall provide
high-static motor and drive capability to enhance
evaporator fan performance.
21. Four-in. Filter Capability:
The unit shall be capable of accepting 4-in. filters by
removal of the factory-supplied 2-in. filters and filter
rack and installation of a specially designed filter
bracket.
22. Supply Air Smoke Detector:
The smoke detector shall send input to the controller
to shut down the unit in case smoke is detected. The
smoke detector shall be factory installed in the sup-
ply air section or shall be available as a field-
installed accessory.
23. Supply and Return Air Smoke Detector:
The smoke detector shall send input to the controller
to shut down the unit in case smoke is detected. The
smoke detector shall be factory installed in the sup-
ply and return air sections or shall be available as a
field-installed accessory.
24. HACR Breaker:
The HACR circuit breaker shall be factory installed.
25. Thru-the-Curb Utility Connectors:
Kit shall provide connectors to permit gas and elec-
trical connections to be brought to the unit through
the roof curb.
26. Condensate Overflow Switch:
The condensate overflow switch shall close when
the condensate level in the pan rises above switch.
27. Outdoor Air Enthalpy Sensor (EconoMi$er IV):
The outdoor air enthalpy sensor is used to sense
outdoor air enthalpy for the EconoMi$er IV device.
The outdoor air humidity sensor, in conjunction with
the standard outdoor air temperature sensor, shall
be used with the EconoMi$er IV device to provide
outdoor enthalpy. Outdoor air enthalpy shall be cal-
culated by the EconoMi$er IV device from the out-
door air temperature and enthalpy readings. When
the outdoor air enthalpy sensor is installed, the
EconoMi$er IV can perform Outdoor Air Enthalpy
control. With the additional installation of an acces-
sory return air temperature sensor and return air
enthalpy sensor, differential enthalpy control can
also be performed.
28. Return Air Enthalpy Sensor (EconoMi$er IV):
The return air enthalpy sensor is used to sense
return air enthalpy for the EconoMi$er IV device.
The return air enthalpy sensor, in conjunction with
the accessory return air temperature sensor, shall be
used with the EconoMi$er IV device to provide
return air enthalpy. Return air enthalpy shall be cal-
culated by the EconoMi$er IV device from the return
air temperature and humidity readings. With the
additional installation of an accessory return air tem-
perature sensor and outdoor air enthalpy sensor, dif-
ferential enthalpy control can also be performed.
29. Return Air Temperature Sensor (EconoMi$er IV):
The return air temperature sensor is used to sense
return air temperature for the EconoMi$er IV device.
When the return air temperature sensor is installed,
the EconoMi$er IV can perform Differential Tempera-
ture control. The return air temperature sensor, in
conjunction with the accessory return air humidity
sensor, shall be used with the EconoMi$er IV device
to provide return air enthalpy. Return air enthalpy
shall be calculated by the EconoMi$er IV device
from the return air temperature and humidity read-
ings. With the additional installation of an accessory
return air enthalpy sensor and outdoor air humidity
sensor, differential enthalpy control can also be per-
formed.
30. Indoor Air Quality (CO
2
) Room Sensor (EconoMi$er
IV:
Sensor shall have the ability to provide demand ven-
tilation control through the EconoMi$er IV. The IAQ
sensor shall be wall mounted with an LED display in
parts per million. The set point shall have adjustment
capability.
31. Return Air CO
2
Sensor (EconoMi$er IV):
Sensor shall have the ability to provide demand ven-
tilation control through the EconoMi$er IV. The IAQ
sensor shall be duct mounted. The set point shall
have adjustment capability.