aci FREEZE STATS Series Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
Version: 10.0
I0000298
FIGURE1: DIMENSIONS
FREEZE STATS SERIES
Installation & Operation Instructions Phone: [phone]
Website: workaci.com
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.
FS-1
FS-2
FS-3
FS-4
FS-50 4.53”
(115.01mm)
Available with 6’, 10’, 20’
& 50’ Capillary Lengths
4.35” (110.49mm)
2.18”
(55.25mm)
FS-5
FS-6
4.53”
(115.01mm)
Ø0.375”
(9.53mm)
3.65”
(92.71mm)
4.35” (110.49mm)
2.18”
(55.25mm)
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. 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..
WIRING INSTRUCTIONS
All wiring should comply with National and Local Electrical Codes.
A M20 watertight tting is installed in the ½” conduit knockout. If the ½” knockout is needed, remove the
M20 tting and install the appropriate conduit tting 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.
Note: The Freeze Thermostat is factory set at 39°F. This is the ideal setting that will provide the best
protection while avoiding nuisance trips.

FIGURE 2: MOUNTING
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 10.0
I0000298
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.
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. 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..
WIRING INSTRUCTIONS
All wiring should comply with National and Local Electrical Codes.
A M20 watertight tting is installed in the ½” conduit knockout. If the ½” knockout is needed, remove the
M20 tting and install the appropriate conduit tting 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.
Note: The Freeze Thermostat is factory set at 39°F. This is the ideal setting that will provide the best
protection while avoiding nuisance trips.
CAUTION!

FIGURE 2: WIRING
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 3
Version: 10.0
I0000298
(BLUE)
(WHITE)
(RED)
(BLUE)
(WHITE)
(RED)
FS-1
FS-1A
FS-3
FS-3A
FS-5
FS-5A
FS-6
FS-2
FS-2A
FS-4
FS-4A
FS-6
FS-6A
FS-50
FS-50A
Note: Falling Temperature and attained low cut-out point
Contact Connection: Red to Blue
White
Red
Blue
N/C
Common
N/O
Schematic Diagram
Note: Falling Temperature and attained low cut-out point
Contact Connection: Red to Blue
White
Red
Blue
N/C
Common
N/O
Schematic Diagram
White
Red
Blue
N/C
Common
N/O

PRODUCT SPECIFICATIONS
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. Do not dispose of with household waste. Do not burn.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 4
Version: 10.0
I0000298
Self-contained, electromechanical
Vapor-lled capillary
Temperature in air
14°F to 54°F (-10°C to 12°C)
392°F (200°C), maximum 60 minutes
To lowest temperature sensed by any 1 ft section of the capillary element
Copper
Duct and across coil mounted
Ø0.08 in. (2 mm) (6’ Length models have a larger bulb at the end)
ON/OFF, low-level single-stage or cut-out control, with One (1) microswitch output
At 39°F (4°C), and safety-lock secured
14°F to 54°F
Over full operating range, via screwdriver slot
Form 1C (SPDT Contact)
250 VAC
15 (8) A
1.8°F (1°K), auto- or manual reset
14°F to 131°F (-10°C to 55°C)
0 to 95% RH, non-condensing
14°F to 158°F (-10°C to 70°C)
Steel, galvanized
ABS, re retardant
NON-SPECIFIC INFORMATION
Thermostat Type:
Sensing Element:
Sensing Media:
Sensing Temperature Operating Range:
Sensing Capillary Overload
Temperature:
Sensing Response:
Sensing Capillary Material:
Sensing Capillary Length:
Sensing Capillary Diameter:
Type of Control:
Low-Level Setpoint (Factory Set):
Low-Level Setpoint Visual Range:
Low-Level Setpoint Adjustment:
Contact Form:
Maximum Contact Switching Voltage:
Maximum Contact Switching Current:
Switching Differential:
Enclosure Operating Temperature
Range:
Operating Humidity Range:
Storage Temperature Range:
Enclosure Base Material:
Enclosure Cover Material: