Optional Cooling Tower Equipment

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	TTXL Optional Equipment
	Basin Heater Stainless steel electric immersion heaters are recommended when operating in low ambient temperature conditions in order to protect against basin freezing when the tower shut down. A NEMA 4 control panel is provided to control up to 4 individual elements (6 KW each). A remote temperature sensor is provided for mounting in the tower basin and the controller is preset to 45 degrees F. All heating elements must be located within the same tower water basin as the sensing element. Threaded flanges are installed in the tower’s cold water basin for mounting each heating element and the temperature sensor. The control panel must be field mounted and wired to each heating element and the temperature sensor. A power source separate from the cooling tower fans is recommended.
	Control Panel Panels are high quality, UL rated, NEMA 4 enclosures (epoxy painted steel) equipped for single-point wiring to a manual disconnect. Each control panel includes power distribution to individual motor starters with lock-out disconnect, magnetic overload protection, and solid state adjustable thermal overload protection. There is a door mounted H-O-A switch and RUN pilot light for each motor starter. Auxiliary motor starter contacts can be provided. A solid state PLC is provided for supply water temperature control with a door-mounted operator interface display panel and an RTD for remote mounting in the customer’s tower discharge piping. Standard water temperature control is done with fan staging through the pre-programmed PLC.
	Pre-Wire Termination TTXL Series Modular Cooling Towers™ are shipped with motors wired to a central junction box (NEMA 4). Motor wiring is Alpha brand quantum shielded 12-4 AWG oil resistant, VFD compatible, liquid tight flexible cable. As an option, motors can be wired to individual "lock-out/tag-out" rotary disconnect switches. Individual rotary disconnect switch
	Sub-Structure Kits Each Modular Cooling Tower has a 1-foot high stub leg kit for mounting on customer furnished support structure. As an option, towers can be furnished with optional leg kits from 4 feet to 12 feet in height. The most common configuration uses 6-foot high legs to allow convenient access to the fan inlet of the tower for inspections and maintenance. Sub-structure kits include FRP legs with integrated footpads (Nylon), angle braces (FRP), and stainless steel assembly hardware; and are shipped loose for installation at the time of delivery and tower installation.
	Variable Frequency Drives Optional water temperature control can be done with a remote mounted variable frequency drive (VFD) suitable for multiple motor operation. The VFD output is wired to the control panel disconnect switch. The output frequency of the VFD can be controlled through the pre-programmed PLC by means of a 4-20 ma or 0-24V analog output. If the VFD is bypassed for any reason, the PLC returns to fan staging control. Operating Tower Tech cooling tower fans through a VFD provides the tightest temperature control possible at the very lowest energy consumption. When operated with variable water flow, the combination of the VFD and the variable flow Rotary Spray Nozzle™ provide energy saving opportunities that no other cooling tower can match. Call your Tower Tech sales representative for details.