Product Overview
Table Of Contents
- Application
- Features
- Specifications
- General Information
- Installation
- When Installing this Product…
- Immersion Well Mounting
- Insert Sensing Bulb in Well
- Securing Bulb with Mounting Clamp
- Securing Bulb with Spring Clip
- Securing Bulb in Wells with Setscrew
- Capillary Compression Fittings
- Element Holders
- Bulb Holders
- Duct Mounting with Capillary Compression Fitting
- Averaging Element Holders
- Bulb Shields
- Strap-On Mounting
- Checkout
- Cross Reference
IMMERSION WELLS AND COMPRESSION FITTINGS
11 68-0040—05
Fig. 9. Installing capillary in 107324A
and 131524A Bulb Holders.
Fig. 10. Mounting bulb holder in furnace plenum.
Fig. 11. Mounting sensing bulb and
311266D Bulb Holder in duct.
NOTE: Dimensions shown in in. (mm).
Duct Mounting with Capillary
Compression Fitting
In some duct-mount application, it is desirable to use a
compression fitting to reduce air leakage at the sensing
element location. For these applications, first mount a waste
nut on the duct to ensure secure mounting. See Fig. 12. See
Table 6 for part numbers.
NOTE: Do not use this mounting method for liquid
applications.
Fig. 12. Mounting sensing bulb in duct using waste nut and
compression fitting.
Averaging Element Holders
The averaging element must be supported so it is distributed
evenly across the entire height and width of the duct. It can
be fastened to perforated strap iron (see Fig. 13) or mounted
with 314439 Mounting Clips (see Fig. 14). This type of
mounting requires threading the element through a grommet
inserted in a hole in the duct wall.
For ducts with limited access, the 7640HX Averaging Element
Mounting Kit allows mounting the element through a single
hole in the side of the duct. This kit requires a length of 1/2 in.
EMT conduit. See Fig. 15.
Fig. 13. Mounting averaging element with
perforated strap iron.
PINCH TOP EDGES OF
HOLDER TOGETHER
AT EACH SEGMENT
CAPILLARY
TUBING
SENSING
BULB
BE SURE EXTENSION TUBE IS
UNDER BULB HOLDER, AS SHOWN
M7217
M17265
CAPILLARY
TUBING
SCREW
HOLES IN
WALL OF
PLENUM
INDOOR
BULB
COMBUSTION CHAMBER
KEEP BULB WELL ABOVE COMBUSTION CHAMBER
14 (356)
3-1/4
(83)
1-3/8
(35)
1-5/8
(41)
3-1/4
(83)
2-3/4
(70)
2-1/4 x 2-1/4 (57 x 57) APPROXIMATE
HOLE IN DUCT FOR INSTALLATION
ADJUSTABLE
SPRING
CLIPS (2)
THERMOMETER
BULB
ACCESS
HOLE
RUBBER GROMET
NO. 8 SHEET METAL
MOUNTING SCREWS (2)
CONTROLLER BULB
M7355
CAPILLARY
COMPRESSION
FITTING
CAPILLARY
TUBING
DUCT
WALL
WASTE
NUT
BULB
(CAPSULE)
M17266
DUCT
WALL
WIRE FASTENINGS
CAPILLARY
TUBING
GROMMET
ELEMENT
M17269