THESE SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE

HEAT RECOVERY UNIT FOR DOMESTIC HOT WATER FROM RESIDENTIAL HVAC SYSTEMS

DESCRIPTION: The ECU Waste Heat Water Heater is connected to a water heater and an air conditioner, heat pump, or refrigeration compressor. A small pump circulates cool water from the bottom of the water heater tank through the heat exchanger. Hot refrigerant gas from the compressor is routed through the gas side of the heat exchanger. An adjustable heat activated valve regulates the water flow rate to maintain the desired temperature at 120 or higher. The heated water is returned to the water tank for domestic use. The ECU heat recovery unit also reduces the compressor load, which increases compressor efficiency and extends compressor life. Reclaiming waste heat from high compressor discharge temperatures is a proven principle of energy recycling that produces abundant hot water safely and economically.

APPLICATION: The refrigerant side of the Heat Recovery Unit Heat Exchanger is installed in the refrigerant hot gas line between the compressor and condenser; or between compressor and reversing valve, if installed on a heat Pump System. The water side of the Heat Exchanger is connected to the water heater tank to form a circulation loop. Power is drawn from the compressor contactor. Waste heat may be collected when the compressor operates, and the water circulating from the water heater tank is less than 140F. On Heat Pump Models, a minimum refrigerant temperature of 125F is also required to allow Heat Recovery operation. CAUTION: Installations subject to freezing ambients must make provision for freeze protection. Heat Recovery Units containing freeze stats must draw power from the line side of the compressor contactor. Drainable hand valves are suggested in addition for freeze protection.

WARRANTY: ECU Heat Recovery Units offer a limited Parts Warranty as follows: Heat Exchanger- 5 years; Pump- 3 years; All other components- 1 year.

MOUNTING/LOCATION: ECU Heat Recovery Units may be mounted indoors or outdoors. They must be mounted vertically, at a height above the top of the Condenser. While normally located outdoors near the air conditioning equipment, they can be located in any convenient place, such as the garage or laundry room; but the refrigerant run should be kept to a minimum.

HEAT EXCHANGER: ECU Heat Recovery Units contain a corrosion resistant double wall heat exchanger of counterflow design for high thermal efficiency. Continuously vented along its entire length, the ECU Heat Exchanger meets strict IAPMO safety criteria, and exceeds UL requirements.

CONTROLS: All ECU models contain a water high limit control. It is factory set to 140 F. Heat Pump equipped models also contain a refrigerant gas low limit. It is set to 125 F. Freeze-protected models are equipped with a water low limit. It is factory set to 50 F, and is designed to operate when water temperatures of 40 F or less are detected, in the event of freezing ambients. DS06 models contain a factory mounted adjustable modulating temperature control valve. The temperature range is 120F to 160F.   The function of this valve shall be to allow water to leave the heat exchanger at a temperature not less than the valve setting. Recommended setting is 120F.

CIRCULATOR PUMP: ECU Heat Recovery Units contain a low wattage direct drive single stage circulator. Standard Models use a Taco 006 series circulator. This pump is water lubricated, water cooled, 3250RPM, 1/40 HP, .38 amps, 230/60/1. UL listed impedance protected motor delivers flow to 12 GPM and head to 10 feet. Patented dirt barrier and replaceable cartridge.

PERFORMANCE RATING: These units will produce 5-7 gallons per hour of hot water (heated 15 F temperature rise) per ton of compressor rating, based on 250 psi minimum high side pressure using R-22, R-134A, R-500 or R-502 refrigerant.
Example: A 5 ton compressor unit could produce 25 gallons of hot water per hour of compressor run time.