Computer-selected Coil
Designed for draw through application, the computer-selected coil offers greater efficiency in the cooling and dehumidification process.
The Large Ceiling Systems (LCS) is designed for when floor space is limited but larger amounts of cooling are required. The LCS™ is the largest classification of the ceiling unit family, and comes in a variety of capacity ranges, from 6 – 13 tons. Single or dual circuit units are available.
SALES LITERATURE
DIMENSIONAL AND COMPONENTS DRAWINGS
Air Cooled DALA-XXXX-AO
Air Cooled DALA-XXXX-CO
Air Cooled DALA-XXXX-AO and CO with AUX Chilled Water
Water/Glycol Cooled DALW/G
Water/Glycol Cooled with Energy Saver DALW/G-xxx-E
Typical Mounting – LCS Unit Mounting for 6 – 13 ton
INSTALLATION, OPERATION & MAINTENANCE MANUAL
CABINET
The heliarc welded tubular steel frame provides maximum strength and ease of service access. Removable panels of galvanized steel are insulated with 1 inch thick, 1-1/2 pound density insulation for thermal protection and sound attenuation. All parts are easily accessible. The electrical panel is hinged and swings out for servicing.
COIL SECTION
Designed for draw through application, the computer selected coil offers greater efficiency in the cooling and dehumidification process. Air bypass is provided to prevent saturated air from being introduced into the controlled space. The coil section is provided with a stainless steel drain pan.
FAN SECTION
The centrifugal, forward curved, double width, double inlet blower configuration is engineered for quiet reliable operation. The belt driven variable pitch drive section provides adjustable air flow capability to match load requirements of the controlled space. The draw through design insures even air distribution across the coil and bypass, low internal cabinet losses, and static sealing of the filter section. Motors are mounted on an adjustable slide base and have internal overload protection.
FILTER SECTION
Units are provided with 4 inch deep pleated design, 30% efficient filters (based on ASHRAE Std. 52-76) MERV 8. The filter section is an integral part of the system and is accessible from either side.
REHEAT
Two stage electric reheat is standard. Low-watt density finned tubular sheathed coils are constructed of stainless steel and sized to maintain room dry bulb conditions during a call for dehumidification. Low-watt density coils eliminate ionization associated with open air electric resistance heating.
REFRIGERATION CIRCUIT
LCS™ is available with either a single or dual refrigeration circuit. The refrigeration circuit includes a hermetic scroll compressor. These durable, heavy duty, fully welded compressors have no gaskets or seals, eliminating the possibility of refrigerant or oil leaking into the controlled space or environment. Scroll compressors also bring a combination of reliability, efficiency, and improved system sound performance. The refrigeration circuit includes built-in compressor overload protection, crankcase heater, filter drier, sight-glass, adjustable expansion valve with external equalizer, low pressure override timer (air cooled units), manual reset high pressure control, and compressor short cycle timer.
Water/glycol cooled units include a plate fin condenser sized to provide the required capacity for heat rejection with minimum water/glycol flow and low total pressure drop. Head pressure regulating valves control the condensing temperature and maintain required capacity at various water/glycol flow rates and temperatures.
Air Cooled with Remote Outdoor Condenser
A wide range of outdoor condensers are available. Condensers are manufactured by Data Aire and sized to meet heat rejection and ambient conditions as required. The industrial duty design includes galvanized corrosion resistant housing, aluminum finned copper tube coils, coated fan guards, energy efficient thermally protected direct drive motors, and variable fan speed control on lead motor for proper control down to -20° F ambient temperatures. Additional fan motors are controlled with ambient thermostats.
Air Cooled with Outdoor Condensing Unit
When compressors are required to be out of the controlled space, LCS™ is available with a remote outdoor condensing unit. The condensing unit includes hermetic scroll compressor(s) with built-in overload protection, crankcase heater, filter drier, sight-glass, and condenser coil. The coil is constructed with copper tubes and aluminum fins. The housing is galvanized steel with vertical air discharge. The condenser fan motor is variable speed type for head pressure control down to -20° F ambient temperatures. Additional fan motors are controlled by ambient fan thermostats.
Water/Glycol Cooled with Remote Outdoor Dry Cooler
Remote outdoor dry coolers are available in a variety of sizes. Each dry cooler includes galvanized corrosion resistant housing, aluminum finned copper tube coil, coated fan guards, surge tank, pump contactor, and energy efficient thermally protected direct drive motors. Dry coolers with multiple motors have cycling control.
CHILLED WATER SYSTEMS
Chilled water systems include all the same features of the LCS™ product line. Designed for draw through application, the computer selected coil offers greater efficiency in the cooling and dehumidification process. Air bypass is provided to prevent saturated air from being introduced into the controlled space. Chilled water flow is controlled by a 3-way chilled water valve for accurate and economical temperature control and dehumidification.
CONTROL SYSTEM
Unit control is maintained with the microprocessor based Mini Data Alarm Processor-II. The Mini Data Alarm Processor-IIis a wall mounted, one row, 16 character control that not only monitors the controlled environment’s humidity, air flow, and cleanliness, but also provides alarm history and an automatic self-test of the microprocessor on system start-up. Multiple messages are displayed by automatically scrolling from each message to the next. All messages are presented in a clear vernacular format on the liquid crystal display (LCD). Multiple alarms are displayed sequentially in order of occurrence.
OPTIONS
EXTENDED COMPRESSOR WARRANTIES
Extended compressor warranties are available for periods of twenty-four (24) or forty-two (42) months in addition to the standard factory eighteen (18) month warranty. These warranties are for the replacement of compressors and do not include labor.