Cleveland Controls DFS-448-153 AIR FLOW SW. POSITIVE # ONLY

AIR FLOW SW. POSITIVE # ONLY

Cleveland Controls' DFS-448-153 AIR FLOW SW. POSITIVE # ONLY Fluid Flow Switches. These switches have positive on/off action and are configured for DC voltage. They can also be configured for AC voltages varying from 12 VAC to 60 VAC by selecting the appropriate screw terminal configuration. The mounting threads on each switch is NPT1/4"-20 BSPT Threads.

Positive air flow switching valve DFS-448-153 for Cleveland Controls Commercial Heating and Cooling Systems range of units starting with Duraflame Modular Heat Pump system.

The new CLEVLAND Controls air-flow switch positive, model DFS-448-153 has two 0 to 10 cubic foot per minute (CFM) air inlet shut off valves with a 0-80% spring return. 3/4" NPT gauge ports are standard. It can be installed with the gas piping on the right or left side. The single acting design is a two piece noncontainment device and features U.L., cUL and I.A.C. listings, high quality plating that resists corrosion and meets all applicable ULs, CANADIAN ICES, CSA,

Cleveland Controls DFS-448-153 Positive Air Flow Switch for Power Vent Furnaces. PART NUMBER USABLE ON MODEL YEARS DFS-448-153 1978 – Present

The DCS-448 Air Flow Switch is used with the 441 or 442 Flow Switch display to monitor dry type and liquid immersion flow switches. In liquid, the straight blade indicates low level alarm setpoint while the flanged blades indicate high level alarm setpoint.

A manual reset positive position damper is a snap action type damper made for use in applications where automatic variable modulation is not needed. The damper positions are adjusted manually or mechanically by an external force instead of the air pressure inside the ducts.

The fan switch is an electro-mechanical (P/N 43100003), direct acting, 3 position, normally open, SPDT switch. The fan switch controls three main functions: