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14
JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
Introduction
•
Compressor Sound Blankets – Optional factory
in stalled sound blankets can be installed to further
reduce com pres sor sound attenuation.
• Replaceable core fi lter driers – The optional
re place able core fi lter driers on the eco
2
provides
a con ve nient means for maintaining and optimiz-
ing the units refrigeration system. Eliminating
ad di tion al fi eld pen e tra tions into the refrigerant
circuit, which could lead to potential problems,
reduce the worry of re frig er ant circuit contamina-
tion.
• Low Ambient Operation – Head-pressure con-
trol is accomplished via a VFD motor controller
rather than an ineffi cient and noisy condenser fan
damper. By varying the speed of the condenser
fan, better control and quieter operation is ob-
tained during the colder months. Low ambient
controls are available on all systems offering
higher rooftop cooling capacity than competitive
units.
• Condenser Fan Motors – The condenser fan
mo tors used on the eco
2
unit are Totally Enclosed
Air Over (TEAO) to provide maximum durability
through any season.
• Condenser Coils – Are available in various
ma te ri als and coatings to suit almost any type of
ap pli ca tion. Alu mi num or copper fi ns, pre-coat ed
or post-coated fi ns are available. The coating is
applied us ing an epoxy coating on the aluminum
coil. Each coil option is benefi cial when the unit
must operate under ex treme con di tions. The use
of an epoxy coated coil is recommended for units
installed in a corrosive environment.
• Hot Gas By-pass – Is standard on VAV units.
• Condenser Coil Protection – The eco
2
is avail-
able with a wire mesh guard for optimum coil
protection.
Heating Section
• Staged gas heat – The eco
2
rooftop gas furnace
is an induced-draft gas furnace designed for
high ef fi cien cy and reliability. The furnace uses
an alu mi nized steel tubular heat exchanger and
op er ates at tem per a tures suffi cient to prevent
acidic ex haust gases from con dens ing in the
heat ex chang er at low fi re rates, unlike drum and
tube style fur nac es that generate condensation
for ma tion. Up to three stages of heat are avail-
able.
An optional stainless steel heat exchanger is also
available.
• Electric – The eco
2
is also available with an
elec tri cal heater that can range from 40kW up to
50kW. De pend ing on the size of the heat re quired,
the eco
2
can have 3 steps of control helping to
provide tighter control of the supply and zone
con di tioned air. With the uti li za tion of this multi
step func tion, the eco
2
can ef fec tive ly reduce en-
er gy con sump tion by bring ing on smaller stages
of heat while main tain ing the max i mum level of
com fort.
• Steam and Hot water – This option will be
available in the future.