Honeywell 107324A Manual De Usuario

68-0040—04

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threaded end of the spud can extend into the controlled 

medium. Consider this additional length when determining how 

far the well extends into the controlled medium.

The length of the well shell starting at the end of the spud 

defines the insertion length. This is the active part of the well 

where the fastest heat transfer occurs. The bulb should be the 

same length as the well shell; however, the well shell can be 

longer, but not shorter, than the length of the bulb. Longer 

shells require inserting the bulb until the end touches the well 

bottom. Shorter shells do not expose the full length of the bulb 

to the temperature of the controlled medium, inhibiting proper 

temperature controller operation.

REMOTE BULB APPLICATIONS
Securing the capillary at the spud with a spring clip or a 

mounting clamp holds the sensing bulb securely in place. See 

Fig. 1. Use the spring-loaded clip on well spuds with no 

mounting flange. Slip it over the capillary and snap it in place in 

the end of the spud. The mounting requires sizing to fit both the 

spud and the capillary diameter. The mounting clamp requires 

wells with a mounting flange at the spud end. The jaws adjust 

to fit both 1/2 and 3/4 in. spuds, and it holds a 5/64 in. capillary. 

Wells are available with and without the matching spring clip or 

mounting clamp. This mounting hardware is also available 

separately.

A few wells have a setscrew in the spud. These wells are 

designed for use on controllers with an armored capillary that 

has a brass plug at the sensing bulb end; for example, 

R8182H,J.

DIRECT INSERTION APPLICATIONS
Most Honeywell direct insertion controllers include provision for 

clamping the controller case on the immersion well spud. This 

requires a well spud with a mounting flange at the end. If the 

well spud has a setscrew, but no mounting flange, a 124904 

Well Adapter can provide the necessary flange. See Fig. 3. 

The well adapter is shipped with several Honeywell 

TRADELINE® direct-insertion controllers.

A capillary compression fitting includes a spud, several 

aligning washers, a neoprene packing ring and a packing nut. 

The spud is internally threaded to hold the packing material 

and the packing nut and externally threaded to fit standard 

boiler tappings. The washers and packing ring are sized to fit a 

particular capillary diameter.

Capillary compression fittings are used to replace an 

immersion well when the sensing bulb of a remote bulb 

controller requires direct insertion into the controlled medium. 

The fitting seals around the capillary. However, compression 

fittings cannot seal off against as much pressure as immersion 

wells. Capillary compression fittings can be used in duct 

applications to minimize air leakage from the duct; a waste nut 

is recommended to provide a secure mounting.

Capillary compression fittings are available in brass and 

stainless steel. In hydronic applications, brass fittings with 

copper sensing bulbs are used and stainless steel is used with 

all other fittings to minimize electrolytic action.

Capillary compression fittings must fit the tapping and the 

capillary diameter. Because the spud must slip over the bulb 

during installation, 11/16 in. bulbs require 3/4 in. spuds.

Bulb holders are used to support a remote bulb and capillary in 

a duct, but are not suitable for hydronic applications. A bulb 

holder must be selected according to the length needed to 

support the bulb in the main airstream and the need for 

plugging the opening in the duct wall.

For best response, string averaging elements evenly back and 

forth across the duct. The element is held in place with either 

perforated pipe strap or 314439 Mounting Clips. If access to 

the duct is limited, use the 7640HX Duct Mounting Kit. Always 

use a grommet to protect the element from abrasion where it 

enters the duct.

NOTE: To minimize heat loss through the fitting, use a waste 

nut and compression fitting.

1. Read these instructions carefully. Failure to follow them 

could damage the product or cause a hazardous 

condition.

2. Check the ratings given in the instructions and on the 

product to make sure the product is suitable for your 

application.

3. Installer must be a trained, experienced service techni-

cian.

4. After installation is complete, check out product opera-

tion as provided in these instructions.

Drain system before beginning well or compression 

fitting installation.

M17261

BACK 

OF 

CASE

WELL 
CLAMP 
SCREW

WELL
ADAPTER

IMMERSION 
WELL CLAMP

SENSING BULB

SETSCREW

WELL
SPUD

BOILER 
WALL

WELL 
SHELL