Secondary surface (fins) are of the plate-fin design using aluminum or copper, with die-formed collars. The fin design for 5/8” & 1/2” O.D. tubes is to be flat, waffle, or sinewave in a staggered tube pattern to meet performance requirements. The fin design for 3/8” O.D. tubes is to be flat, louvered, or sinewave in a staggered tube pattern to meet performance requirements. Collars will hold fin spacing at specified density and cover the entire tube surface. Aluminum properties are to be Alloy 1100 per ASTM B209, with O (soft) temper; copper is to be Alloy 11000 per ASTM B152-06 with soft (anneal) temper. Fins are to be free of oils and oxidations.
Tubes and return bends shall be constructed from seamless UNS C12200 copper conforming to ASTM B75 and ASTM B743. Properties shall be O50 light annealed, with a maximum grain size of 0.040mm. Tubes are to be mechanically expanded into plate fins for maximum heat transfer.
Standard headers are to be constructed of seamless UNS C12200, Type L copper material sized to match specified connection size. Headers are to have finished integral spin-closed ends designed to withstand test pressure.
Evaporator coils shall be designed with brass liquid distributors (as required) and copper sweat suction connections. Distributors shall be capped using soft-solder for ease of cap removal; suction connections shall be capped.
Coil casing material shall be of G90 galvanized steel, 16 gauge minimum. Heavier gauge and optional material casings are available as required. Intermediate tube supports are to be provided on all coils 50” and longer fin length. Coil casings on top and bottom of coils are to have double-flange construction, allowing for vertical stacking of coils.
Coils shall be tested at 550 PSIG using dry nitrogen, submerged under water. Dual-operator verification shall determine that all coils are leak-free. Coils shall be certified to withstand 750 PSIG working pressures and guaranteed up to 200° F working temperature.
Our coils are UL recognized as Refrigerant Containing Component. Coils to be used with refrigerant R-410A will have undergone cycle testing and will be safety listed with a 750 PSIG rating.
DX EVAPORATOR COILS
Standard/Base in Bold Below
DX EVAPORATOR COILS
Standard / Optional
|Fin Material||Aluminum||Optional -Copper; Stainless Steel|
|Casing Material||Galv. Steel 16 gauge||Optional - Galv. Steel 12, 14, 16 and 18 gauge •
304, 316 Stainless Steel 12, 14, and 16 gauge • 14 Gauge aluminum
|Header Material||Copper||Optional - Type K Copper|
The HVAC industry has many manufacturers of units that all have heating and/or cooling coils as an integral part of their......