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GUIDE SPECIFICATIONS — SIZES 155-300 (cont)
18. Glycol Coil:
Coil shall be 2-row copper tube (
1
/
2
-in. OD) with
aluminum plate fins (590 fins/m; 15 fins/in.) and
(41.28 mm; 1.625 in. OD) copper headers. Input and
output connections shall be (41.28 mm; 1.625 in.
ODM) copper stubs for sweat connections. Coil shall
be furnished with suitable support rails, end plates,
and hardware for ready field installation in heater
compartment.
19. Alternate Drive:
Shall provide higher static drive capability to en-
hance evaporator-fan performance rpm range.
20. Hail Guard, Condenser Coil Grille:
Shall protect the condenser coil from hail, flying
debris, and damage by large objects without increas-
ing unit clearances.
21. 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
different enthalpy control. The sensor allows the
EconoMi$er controller to determine if outside air is
suitable for free cooling.
22. Return Air Enthalpy Sensor:
The return air enthalpy sensor shall be used with the
EconoMi$er device. When used in conjunction with
an outdoor air enthalpy sensor, the EconoMi$er
device will provide differential enthalpy control.
23. Return Air Temperature Sensor:
The return air temperature sensor shall be used with
the EconoMi$er device. When used in conjunction
with the standard outdoor air temperature sensor,
the EconoMi$er device will provide differential tem-
perature control.
24. Light Commercial Thermidistat:
Field-installed wall-mounted thermidistat is used to
control temperature and activation of the dehumidifi-
cation package. The thermidistat can be set for
humidity settings from 50% to 90% relative humidity.
551A/558F/559F155-300