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Honeywell buồm chuyển mạch (Hình T7) được sử dụng trong ngọn lửa bảo vệ các ứng dụng để chứng minh luồng khí đốt trước khi 1I1OJhloft ar.d trong khi ổ ghi đang chạy. Họ cũng có thể được sử dụng trong ducls không khí để đảm bảo rằng một lò là cung cấp và các ứng dụng đặc biệt. | Ệ Ìị ạọỊdÌ- interlocks ỊỆ Ệi SAIL SWITCHES Honeywell sail switches Fig. 77 are used in flame safeguard applications to prove combustion airflow before Ilghtoff and while the burner is running. They can also be used in air ducts to assure that a furnace is supplying enough warm air FIG. 77-HONEYWELL SAIL SWITCHES. A small metal sail mounted on a pivot extends into the air stream. Mechanical linkage transmits motion of the salt to a switch. The switch makes or breaks when the airflow reaches a specified velocity. The switch can be used in line or low voltage circuits. Honeywell sail switches available for use in flame safeguard systems are listed in Table V at the end of the section. Tabla VI includes switching action operating air velocity and direction sail size and material and special applications. For further Information refer to the Instruction sheets for the sail switches. TABLE VI-SUMMARY OF HONEYWELL SAIL SWITCHES MODELS SWITCHING ACTION ON INCREASING AIR VELOCITY OPERATING AIR VELOCITY SAIL SIZE DIRECTION OF AIRFLOW TO ACTUATE SAIL MATL SPECIAL APPLICATIONS FEET PER MINUTE METRES PER SECOND INCHES MILLIMETRES S43A spst mercury switch makes 600 3.05 5 X 4-1 2 127 X 114 Left to Right Steel Gas-fired unit heaters and air conditioning systems 1000 5.1 2 X 5-1 2 51 X 140 1000 5.1 4-1 2 X 5 114 X127 S43B Bp st mercury switch makes . 600 3.05 2-11 16X 7-1 2 68x191 Right to Left R to L Upward b 1000 5.1 2 X 5-1 2 51 X 140 1000 5.1 2-11 16 X 7-1 2 68 X 191 1000 5.1 4-1 2 X 5 114x 127 1250 6.4 4-1 2 X 5 114 X127 S43O spat mercury swttch. breaks 1000 5.1 2 X 5-1 2 51 X 140 Right to Left S437A spst snap-acting switch makes 1900 9.6 1 x3 25x76 horizontal11 Aluminum Farm crop dryers 950 4.8 1-1 2 X 4 38 X 102 S437B spst snap-acting switch makes 1900 9.6 1 x3 25x76 1000 5.1 1.5 X 3.8 38x96 S637A spdt snap-acting switch one set makes one set breaks 1900 9.6 1 x3 25x76 2200 11.2 1 X 2-1 2 25x64 a Forward bent sail. b Adjustable to actuate on upward airflow tor vertical duct
