Figure 1: Mounting sensing element inside coil
Note:
Allow for 1 in. (25 mm) of drop per 1 ft (305
mm) of run.
Table 1: Maximum drop by unit width
Unit width, ft (m)
Maximum drop per
segment, in. (mm)
Callout A
Callout B
5 (1.5)
5.25 (133)
10 (3.0)
10.50 (267)
15 (4.6)
15.75 (400)
20 (6.1)
21.00 (533)
25 (7.6)
26.25 (667)
30 (9.1)
31.50 (800)
Alternate installations
Alternate installations are shown in Figure 2 and Figure
3. If you select these installation methods, mount the
temperature control above the sensing element whenever
possible. If you cannot mount the control above the
element, loop the capillary or element slightly below the
control, then route the element toward the top of the coil,
and begin serpentining in a downward direction from the
top of the coil.
Keep the loop as short as possible, maximum of 4 ft (1.2
m). If you mount the control below the sensing element,
prevent possible nuisance alarms by mounting the control
in a conditioned space. When using the A11 Series control,
coil the excess capillary inside the conditioned space and
secure. The excess capillary is the small capillary between
the control and sensing element.
Figure 2: Mounting options - inside the duct
Figure 3: Mounting options - outside the duct
Table 2: Mounting options
Callout
Description
A
Control mounted inside duct, duct
surrounded by unconditioned space
B
Control mounted inside duct, space
surrounding duct is unconditioned
C
Ductwork installed inside conditioned space
only
D
Ductwork installed in heated space only
E
Ductwork inside heated or unheated space
Mounting guidelines
CAUTION
Risk of Environmental and Property Damage
Avoid sharp bends in capillary tubes. Sharp bends
can weaken or kink capillary tubes, which may result
in refrigerant leaks or restrictions of flow.
A11 Series Low Temperature Cutout Control Installation Guide
2
