Data Aire DAFC-11 Especificaciones descargar pdf (Pagina 7)

FILTER SECTION

Units are provided with 4 inch deep, 30% efﬁ cient ﬁ lters (based

on ASHRAE Std. 52.1-92). The ﬁ lter section is accessible from

the top or side on downﬂ ow units and the right hand side on

upﬂ ow units.

REHEAT

Three stage electric reheat is standard. Low-watt density ﬁ nned

tubular sheathed coils are constructed of stainless steel and

provide ample capacity to maintain room dry bulb conditions

during dehumidiﬁ cation. Low-watt density coils eliminate ion-

ization associated with open air electric resistance heating.

HUMIDIFICATION

Modular Data Temp units include an electric steam genera-

tor humidiﬁ er with a “quick change” disposable cylinder and

an auto-ﬂ ush cycle. The steam generator humidiﬁ er with its

patented control system optimizes cylinder life and energy ef-

ﬁ ciency by concentrating incoming water to a predetermined

conductivity much higher than that of the entering water.

The control system continuously monitors the conductivity in

the cylinder through its electronics which allows water to be

ﬂ ushed as often as is necessary to maintain the capacity at this

design conductivity. The high design conductivity results in a

minimum ﬂ ushing of heated water, thereby saving energy. The

humidiﬁ er is designed to allow units at any voltage to produce

full rated steam output capacity at an optimum water level

based on the design conductivity.

REFRIGERATION CIRCUIT

The single circuit, refrigeration circuit is designed around a

high efﬁ ciency hermetic scroll compressor. These durable,

heavy duty, fully welded compressors have no gaskets or seals,

substantially reducing the possibility of refrigerant or oil leak-

ing into the controlled space or environment. Scroll compres-

sors bring a combination of reliability, efﬁ ciency and improved

system sound performance to the Modular Data Temp line.

The refrigeration circuit includes built-in compressor overload

protection, crankcase heater, ﬁ lter drier, sight-glass, adjustable

expansion valve with external equalizer, low pressure override

timer (air cooled units), manual reset high pressure control,

compressor short cycle timer, and rotolock service valves.

Water/glycol cooled units include a counterﬂ ow plate-ﬁ n

condenser sized to provide the required heat of rejection with

minimum water/glycol ﬂ ow for a low total pressure drop.

Head pressure water regulating valves control the condenser

water ﬂ ow to maintain proper head pressure under varying load

conditions.

Air Cooled with Remote Outdoor Condenser - A wide range

of outdoor condensers are available. Condensers are manu-

factured by Data Aire and sized to meet the heat rejection and

ambient conditions as required. The industrial duty design

includes aluminum corrosion resistant housing, aluminum

ﬁ nned copper tube coils, powder coated fan guards, energy

efﬁ cient thermally protected direct drive motors and variable

fan speed control on lead fan motor for proper control down

to -20° F. Additional fan motors are controlled with ambient

thermostats.

Air Cooled with Indoor Condenser - A wide range of ﬂ oor

mounted indoor condensers with horizontal intake and dis-

charge are available for applications where an outdoor con-

denser cannot be used. Finished to match the indoor evapo-

rator section, the condenser includes a centrifugal, forward

curved, double width, double inlet blower engineered for

quiet, reliable operation. The belt driven variable pitch drive

provides adjustable air ﬂ ow. The motor has internal over-

load protection and is mounted on an adjustable slide base.

Indoor condensers are provided with a factory mounted and

piped receiver, complete with a head pressure control valve

to maintain head pressure under varying ambient conditions

down to -30° F.

Air Cooled with Outdoor Condensing Unit - When compres-

sors are required to be out of the controlled space, Modular

Data Temp units are available with a remote outdoor con-

densing unit. The condensing unit includes a hermetic

scroll compressor with built-in overload protection, crankcase

heater, ﬁ lter drier, sight-glass and condenser coil. The coil is

constructed with copper tubes and aluminum ﬁ ns. The hous-

ing is corrosion resistant aluminum with vertical air discharge.

The condenser fan is a variable speed type for head pressure

control down to -20° F ambient temperature. Additional fan

motors are controlled by ambient fan thermostats.

Water/Glycol Cooled with Remote Outdoor Fluid Cooler

- Remote outdoor ﬂ uid coolers are available in a variety of

sizes. Each ﬂ uid cooler includes aluminum corrosion resistant

housing, aluminum ﬁ nned copper tube coil, coated fan guards,

surge tank, motor contactor, pump contactor and energy ef-

ﬁ cient thermally protected direct drive motors. Multiple fan

motors are staged to maintain the desired condenser supply

ﬂ uid temperature.

Design Features

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Data Aire DAFC-11 Especificaciones Pagina 7

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