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FREEZE STATS SERIES
Installation & Operation Instructions
GENERAL INFORMATION
The FS Series are low limit controllers, also
known as "Freeze Stats". These devices were
designed for use on HVAC equipment that
require low-temperature cutout protection to
prevent cooling coils from freezing. They should
be mounted between the heating and cooling
coils on the supply side of the fan unit and
respond to the lowest temperature sensed
along any one foot section of the sensing
element. The FS Series has manual and
automatic reset versions, as well as, models that
feature one or two sets of SPDT contacts.
Numerous capillary lengths are also available.
MOUNTING INSTRUCTIONS
• Do not uncoil more element or capillary
than is required for the application.
• Do not sharply bend the element or
capillary more than necessary bending
hardens the element and makes it brittle. If
the element or capillary can be subjected to
vibration, protect any surface that makes
contact.
Strap the element on a coil; for example, in an
area where freezing can occur, or mounted in a
duct. Use as much of the element as necessary
for maximum protection. Use metal straps to
fasten the element to the coil to be controlled.
Use clips for mounting the element in a duct.
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.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
FIGURE1: DIMENSIONS
FS-1
FS-2
FS-3
FS-4
FS-50
4.35" (110.49mm)
2.18"
(55.25mm)
FS-5
FS-6
3.65"
(92.71mm)
2.18"
(55.25mm)
4.35" (110.49mm)
Page 1
Phone: 1-888-967-5224
Website: workaci.com
4.53"
(115.01mm)
Available with 6' , 10' , 20'
& 50' Capillary Lengths
4.53"
(115.01mm)
Ø0.375"
(9.53mm)
Version: 10.0
I0000298
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Summary of Contents for aci FREEZE STATS Series
- Page 1 FREEZE STATS SERIES Phone: 1-888-967-5224 Installation & Operation Instructions Website: workaci.com FIGURE1: DIMENSIONS GENERAL INFORMATION The FS Series are low limit controllers, also FS-1 FS-2 known as "Freeze Stats". These devices were FS-3 designed for use on HVAC equipment that FS-4 4.53”...
- Page 2 FIGURE 2: MOUNTING CAUTION! Thermostat enclosure to be surface mounted; avoid locations subject to excessive vibration. Mount to at 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.
- Page 3 FIGURE 2: WIRING FS-1 FS-1A (WHITE) FS-3 FS-3A FS-5 FS-5A (BLUE) FS-6 (RED) Schematic Diagram Note: Falling Temperature and attained low cut-out point White Contact Connection: Red to Blue Common Blue FS-2 FS-2A FS-4 (WHITE) FS-4A FS-6 FS-6A (BLUE) FS-50 FS-50A (RED) Schematic Diagram...
- Page 4 ABS, re retardant Enclosure Cover Material: WARRANTY The Freeze Stat Series is covered by ACI’s Two (2) Year Limited Warranty, which is located in the front of ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s website: www.workaci.com. W.E.E.E. DIRECTIVE At the end of their useful life the packaging and product should be disposed of via a suitable recycling centre.