Change-Over Switches for Fan-Coil Systems

The MARS Series 390 change-over switches are used for

summer-winter change-over of electric thermo-stats in hydronic

heating - cooling fan-coil units.

Features:

• Color coded leads allow easy installation

• SL-8 thermostat is enclosed in sealed case for trouble-free operation

• Snap-acting disc type, insures accurate temperature repeatability

• Can be mounted in any position

• UL and CSA listings available

Installation

The SL-8 change-over switch is located on the main run of the supply line where it can quickly sense the maximum temperature of the hot or cold water passing through. If the SL-8 switch is exposed to surrounding temperatures, thermal insulation should be wrapped around the switch case to maintain desired thermal response.