aci A/FS-1 Installation And Operation Instructions

Description
Electro-mechanical, low-temperature limit/cut-out thermostat with a 20 ft, 10 ft or 6 ft capillary sensing element, auto- or
manual reset, and 1-SPDT or 2-SPDT switched output.
Applications
The thermostat and its capillary sensing element provide an antifreeze function. It detects temperature drops below a fixed
safety value (setpoint), i.e. heaters in A/C units, exchangers in cooling systems, etc.
Operation
Any 1-foot length of the sensing element subjected to temperatures below the low cut-out setpoint setting of the thermostat will
actuate the thermostat switch mechanism regardless of the temperature being sensed by the remainder of the element.
The low cut-out setpoint is factory set and can be adjusted by turning the slotted screw on top of the enclosure.
NOTICE: The Freeze Thermostat is factory set at 40°F. This is the ideal setting that will provide the best protection while
avoiding nuisance trips.
Auto-reset types will automatically switch back to the normal position if the temperature returns to normal conditions.
Manual-reset types will switch back only if both the temperature returns to normal conditions and the reset button (at the
enclosure's front) is manually pushed.
Wiring
All wiring should comply with National and Local Electrical Codes.
A M20 watertight fitting is installed in the ½" conduit knockout. If the ½" knockout is needed, remove the M20 fitting and
install the appropriate conduit fitting in the 0.830" knockout in the bottom of the enclosure.
Maximum wire size is 14 AWG (2.5mm) two copper wires. Use a screwdriver to loosen the terminal connections screws.
Strip wire ends 3/8" and insert into box connectors on the switch block and securely retighten the screws.
Now replace the cover and tighten the screw on the front cover.
NOTICE: The Freeze Thermostat is factory set at 40°F. This is the ideal setting that will provide the best protection while
avoiding nuisance trips.
Installation
Locate the sensing element where it can sense the average temperature of the space to be controlled.
Locate the thermostat case where the ambient temperature is always warmer than the set point.
Thermostat enclosure to be surface mounted; avoid locations subject to excessive vibration.
Mount to flat surface using oval holes only. (See Wiring Diagrams) Mounting with round holes in middle of freeze stat
may damage the instrument and cause improper operation.
Install the capillary sensing element across the face of the coil, horizontally serpentine only. If too much of the element is
vertical, it will not operate properly.
Avoid sharp bends or kinks in the sensing element.
Install the thermostat in an upright position so that the bellows point down and the capillary tube exits the bottom of the unit.
AUTOMATION COMPONENTS, INC
2305 Pleasant View Road
Middleton, Wisconsin 53562
www.workaci.com (888) 967-5224
Carefully Read These Instructions Before Installation!
Page 1 of 3
Installation and Operation Instructions
A/FS-1, A/FS-1A, A/FS-2, A/FS-2A,
A/FS-3, A/FS-3A, A/FS-4, A/FS-4A,
A/FS-5, A/FS-5A, A/FS-6, A/FS-6A
Version : 3.0
I0000298