For enhanced evaporator capacity, system stability, compressor protection and oil return.

Nominal SLHE selections should be based on system horsepower, which will provide a nominal 10ºF subcooling and a nominal 20ºF suction superheat for R-22, R-502, R-404A, R-507, R-407A, R-504, R-134A, R-407C and R-410A at 110ºF condensing and 25ºF suction. For example, for a 1-1/2 HP system, select an SLHE 1-1/2. Do not select undersized models to avoid high suction pressure drops and gas whistling.

Selections based on suction and liquid line sizes are appropriate for standard low, medium and high temperature refrigeration systems provided the system HP rating closely matches the SLHE selection.
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Unit of Measure
Items
Suction Line Heat Exchangers

1 Horsepower (hp), 5/8 Inch (in) Gas Connection, and 13-3/4 Inch (in) Length Suction Line Heat Exchanger
Suction Line Heat Exchangers

1-1/2 Horsepower (hp), 7/8 Inch (in) Gas Connection, and 14-1/2 Inch (in) Length Suction Line Heat Exchanger
Suction Line Heat Exchangers

2 Horsepower (hp), 1-1/8 Inch (in) Gas Connection, and 15 Inch (in) Length Suction Line Heat Exchanger
Suction Line Heat Exchangers

1/2 Horsepower (hp), 1/2 Inch (in) Gas Connection, and 11-1/2 Inch (in) Length Suction Line Heat Exchanger
Suction Line Heat Exchangers

3/4 Horsepower (hp), 5/8 Inch (in) Gas Connection, and 11-3/4 Inch (in) Length Suction Line Heat Exchanger
Description N/A For enhanced evaporator capacity, system stability, compressor protection and oil return.

Nominal SLHE selections should be based on system horsepower, which will provide a nominal 10ºF subcooling and a nominal 20ºF suction superheat for R-22, R-502, R-404A, R-507, R-407A, R-504, R-134A, R-407C and R-410A at 110ºF condensing and 25ºF suction. For example, for a 1-1/2 HP system, select an SLHE 1-1/2. Do not select undersized models to avoid high suction pressure drops and gas whistling.

Selections based on suction and liquid line sizes are appropriate for standard low, medium and high temperature refrigeration systems provided the system HP rating closely matches the SLHE selection.
Brands N/A Doucette Industries, Inc.
Power N/A 1 hp N/A 1-1/2 hp N/A 2 hp N/A 1/2 hp N/A 3/4 hp
Gas Connection Size N/A 5/8 in N/A 7/8 in N/A 1-1/8 in N/A 1/2 in N/A 5/8 in
Liquid Connection Size N/A 3/8 in N/A 3/8 in N/A 3/8 in N/A 1/4 in N/A 3/8 in
Length N/A 13-3/4 in N/A 14-1/2 in N/A 15 in N/A 11-1/2 in N/A 11-3/4 in
Design Working Pressure (DWP) N/A 700 psig N/A 700 psig N/A 400 psig N/A 500 psig N/A 500 psig
Weight N/A 2 lb N/A 3 lb N/A 3 lb N/A 1 lb N/A 2 lb
Additional Information N/A Selection of oversized models will provide additional liquid subcooling and suction superheat. Oversized models are acceptable only if the suction gas temperature to the compressor is not raised above 65ºF for proper compressor performance.

Standard and custom models can be selected by Doucette to meet any performance criteria, up to 60ºF subcooling. For exacting subcooling and superheat performance please contact the factory.