Conditioned Air (CA) System


A cooling and heating solution for the most demanding requirements and severe environments. Television production trailers, mobile medical units, telecommunication portable units, mobile command and control centers, and custom coaches are just a few of the applications with critical heating, ventilation, and air conditioning (HVAC) needs solved with HydroThrift conditioned air (CA) systems. Custom engineered to operate in extreme ambient conditions from -20ºF to 122ºF, HydroThrift CA systems will exceed their rated performance at the most severe ambient design conditions - continuously, efficiently and with minimum maintenance.

Continuous compressor operation with hot gas bypass. Sensitive electronic television production, communication, and medical equipment can't tolerate voltage surges caused by cycling an air-conditioning compressor off and on for temperature control. HydroThrift CA systems operate the air-conditioning compressors continuously and, when the temperature control is satisfied, a full 100% hot gas and refrigerant bypass system stops air-cooling entirely. Full 100% and continuously variable 0-100% partial hot gas bypass prevents over cooling equipment and personnel like typical hot gas bypass designs that reduce cooling capacity by only 25%.

Completely automatic and reliable operation. Personnel or equipment cooling requirements are controlled by HydroThrift's Vision terminal providing automatic operation with intelligent monitoring by a programmable control relay. HydroThrift's Vision terminal monitors the cooling and heating system for faults and reports any problems on an LCD display. Fault tolerant logic allows the system to remain operational while reporting minor warnings and operators may bypass some faults with the Vision terminal to continue operation. A fail safe manual hand switch will also bypass the automated control system when the cooling system simply must operate providing an exceptional operation reliability.

Engineered systems boost capacity and reliability. HydroThrift conditioned air systems are custom engineered to meet application requirements for optimum efficiency and dependability. As a worldwide supplier of industrial cooling and heating solutions, HydroThrift specialists engineer, design, and fabricate CA systems to rigorous industrial requirements and quality standards. Each system is assembled and tested by a certified refrigeration technician to guarantee rugged, dependable, and efficient operation with the endurance to survive over-the-road travel.

ALSO AVAILABLE: Economical upgrades to commercial units. As an economical alternative to a custom engineered and fabricated mobile HVAC system, HydroThrift provides quick turn-around upgrades of commercial wall-mount units to incorporate a 0-100% partial and full 100% hot gas bypass system and enhanced low-ambient condenser fan speed control. Available in individual unit sizes up to 6 tons cooling capacity, HydroThrift upgrades are available for both right and left hand units such that two units can be mounted on the front of a trailer.

System Profile

Expanding 53-Foot Television Production Trailer Conditioned Air Unit. The HydroThrift G-Force Model CA+20 consists of (2) 50% capacity, independent HVAC systems mounted in a rugged, light weight aluminum tubular frame for enhanced control and reliability. The CA+20 is designed to circulate 7,000 SCFM of airflow at 0.75" WC ESP. For equipment cooling and personnel comfort, the air conditioning system is rated to provide at least 20 tons of cooling in ambient conditions from -20ºF to 122ºF and will continue to operate at higher temperatures. Electric resistance heaters provide 30 KW of heat for winter comfort. Electrical power requirements are typically 208 Volts, three-phase, 60-hertz with a permissible voltage range of 190 to 250 Volts. The CA+20's compact design including a mounting flange facilitates installation on the front of the trailer without interference with the truck. The unit can be supplied complete with casing and doors or an open frame that the trailer manufacturer can finish to match the end-user's requirements.

Premium refrigeration equipment. Each half of the G-Force Model CA+20 air conditioning system features a scroll compressor, custom-engineered micro-channel condenser and evaporator coils, stainless steel drip pan, refrigerant receiver, and service valves. The CA+20 uses common Sporlan refrigeration components including a balanced-port thermostatic expansion valve, liquid line filter and solenoid valve, suction filter, hot gas discharge bypass valves, desuperheat thermostatic expansion valve, and sight glass with moisture indicator. System ventilation is provided by a belt-driven, double inlet, forward curved centrifugal fan and a non-overloading drive motor. High-velocity pleated filters provide filtration.

Variable Frequency Drive for Low Ambient Control. The HydroThrift G-Force CA+20 has a direct drive axial flow fan that draws air from below the unit and exhausts warm air out the front of the condenser coil. Condenser head pressure is maintained at low load conditions and low ambient conditions with a variable frequency drive that is controlled by HydroThrift's programmable control relay. The R-410A refrigerant receiver maintains the proper volume of refrigerant in the system regardless of load and ambient conditions.

System safeties and gauges. Receiver pressure relief, manual-reset high pressure switch, automatic reset low pressure switch, heater automatic and manual reset switches, air flow switch, and an electrical power and phase monitor are standard safety features of the CA+20. Compressor discharge and suction pressure transmitters provide these important refrigeration parameters to the HydroThrift Vision terminal for easy and continuous monitoring. Exterior system high and low pressure service ports are provided for diagnostic and maintenance purposes.

Automatic control. A NEMA 4 electrical enclosure contains all electrical components including motor and heater contactors, the variable frequency drive, programmable control relay, and a non-fused disconnect switch. The control circuit is 208 single phase and 24 VDC. The programmable control relay monitors blower, compressor, and heater operating time, compressor discharge and suction pressures, the variable frequency drive, and the system safeties.

HydroThrift Corporation • 1301 Sanders Ave. SW • P.O. Box 1037 • Massillon, Ohio 44648-1037 • Map • Phone: 330-837-5141
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