Finned heating coils type LFA, LFB, LFD and LFE consist of a number of copper tubes with aluminum fins built into a frame of galvanized sheet steel.
The frame has flanges for mounting of the coil and connection to ducting.
The heating medium enters and leaves through steel headers which have screwed pipe connections.
The fields of application of the four types are listed in the table below.
The tubes of the heating coil are coupled together by means of bends to form circuits of 2, 4,6 or 8 passes. The number of passes that will make the coil best suited for the operating conditions concerned, is found by means of the selection charts.
Each of the four types is made in 140 standard sizes with face areas up to H (height) x B (width) = 1000 x 2000 mm and with 1, 2, 3 or 4 rows of tubes in the direction of the air flow. The standard sizes can be combined into banks on top of, beside or after each other.
The designation of a heating coil or a bank of coils is composed of the type designation plus a number of digits representing the dimensions of the face area, the number of rows of tubes, and the number of passes in each circuit, as illustrated by the examples overleaf. When ordering please state position designations.
