Important:
On A11 low temperature cutout
controls, the brass tubing just below the
bellows is not temperature sensitive and
can be mounted in the ambient space
temperature. The copper sensing element
begins below the solder bead. This part is
temperature-sensitive, and you must properly
position it to work correctly.
8. Use the mounting bracket and self-tapping screws,
to fasten the control to the side of the duct.
9. Start at the bottom of the coil and secure the far
end of the sensing element.
10. Secure the sensing element with 1/4 in. (6.4 mm)
poly sleeve and tie wraps.
11. Position and mount the sensing element within
6 in. (152 mm) of the bottom of the coil.
12. Work your way back up to the bellows, stringing
the sensing element in a serpentine fashion
horizontally across the face of the coil, as shown in
13. Successive horizontal runs of the sensing element
should be inclined slightly upward.
14. Make sure that horizontal runs of the sensing
element are no more than 12 in. (305 mm) away
from each other.
Note:
On a wide coil, you could be left with
a very small S to get back up to the control.
Locate this topmost bend in the correct
position to use up any remaining slack in
the length of the sensing element. You may
need to build a support for the bracket at that
turning point.
15. To prevent damage caused by vibration or
abrasion, place a short piece of 1/4 in. (6 mm) poly
sleeve around the capillary at the point where it
passes through the entry hole in the duct work. Slit
the tubing lengthwise to permit easy installation.
You do not normally need caulking or sealant when
you use the right size hole and tubing.
16. At the bends, use a TE-6001-8 Averaging Element
Mounting Bracket to obtain the correct radius and
protect the sensing element. The radius of each
bend of the sensing element must be at least 3 in.
(76 mm), but not exceed 14 in. (355 mm).
Mounting in small ducts with
inaccessible coils
Note:
• Begin mounting at the bottom and work up to the
thermostat.
• When the duct is covered with insulation, mount
stat to standard electrical box and cover.
Figure 5: Mounting Low Temperature Cutout Controls
in small ducts with inaccessible coils
Table 4: Mounting controls in small ducts with
inaccessible coils callouts
Callout Description
A
A11
B
Support the element at both ends and every
2 in. to 3 in. along the element. Consider using
a short piece of poly over the element or
capilliary at the supports.
C
Use 3/8 in. copper or 1/2 in. EMT to support
the element.
D
Must be within 6 in. of the bottom of the coil.
The bottom is the most important part of the
coil to protect.
E
Minimum of 1 ft horizontal sensing. No coils
on the flat portion of the bracket.
F
Mount the element at a slight downward
incline. Keep the loops horizontal or below
and make them the same size.
G
Cut a hole of minimum 2 1/4 in. in size. Use
1/2 in. box connectors on each end of the EMT
to secure it to the box covers.
A11 Series Low Temperature Cutout Control Installation Guide
4
