Honeywell 107324A Manual De Usuario

IMMERSION WELLS AND COMPRESSION FITTINGS

68-0040—04

Bulb Shields

A bulb mounted outdoors requires protection of a bulb shield.

1. Expose the bulb to representative air temperature but

not direct sunlight.

2. Mount it high enough so:

a. Accumulated snow, leaves or other debris can-

not obstruct air circulation around it.

b. Children cannot reach it.

c. Avoid vents from the building.

3. Drill a 3/4 in. (19 mm) hole in the outside wall.

4. Bring the sensing bulb through the hole.

5. Mount the bulb in the bulb shield. See Fig. 16.

6. If the seal-off tube extends outside the shield, bend it

under the shield.

7. Hold the shield over the mounting location and form a

small-radius bend in the tubing.

8. Place the split plug (provided with 34886A; or order

107323A Split Plug separately) around the tubing and

move the bulb and shield into mounting position as a sin-

gle unit.

9. Push the split plug into the hole until it is wedged

securely in place.

10. Fasten the shield on the wall with screws (provided with

34886A).

11. If the tubing is properly shaped and the split plug

installed as directed, the shield covers the split plug and

conceals the hole in the wall.

Fig. 16. Mounting bulb in bulb shield.

Strap-On Mounting

Occasionally, applications require the sensing bulb to be

strapped to the outside of a pipe. For these applications, use

either the 105900 Pipe Strap or metal hose clamps. The pipe

strap fits pipe up to 3/4 in. OD.

External mounting of the sensor produces a slight offset in the

temperature control point. Typically, the control temperature

increases as much as 5°F (2.8°C) with a bare sensor strapped

to the discharge pipe. Applying insulation around the sensor

and pipe decreases the offset. Insulation must be used if large

fluctuations in ambient temperature occur near the pipe.

Mount the bulb on the pipe as follows:

CAUTION

Significant Calibration Shift Hazard.

Overtightening clamps distorts bulb calibration.

Do not overtighten hose clamps.

1. Secure the bulb to the pipe with a 105900 Pipe Strap or

metal hose clamps. See Fig. 17 and 18.

2. If necessary, cover the bulb and pipe with foam rubber

insulation that extends at least 6 in. (152 mm) beyond

both ends of the bulb. See Fig. 19.

IMPORTANT

Do not allow the duct tape to come into contact with

the pipe.

3. Secure foam rubber with duct tape.

Fig. 17. Mounting bulb to pipe with pipe strap.

NOTE: When using a pipe strap, the maximum pipe OD is 3/4

in.

Fig. 18. Mounting bulb to pipe with metal hose clamps.

Fig. 19. Covering bulb and pipe with foam rubber

insulation.

M17272A

OUTDOOR

SENSING

BULB

EXTENSION

TUBE

BULB SHIELD

CAPILLARY

TUBING

3/4 IN. (19 mm)

HOLE IN WALL

PLUG HOLE WITH

ACCEPTABLE MATERIAL

BULB

T-CLAMP

CAPILLARY

TUBING

SUPPLY WATER PIPE

M8836

CAPILLARY TUBE

METAL HOSE CLAMPS

M17267

M17268

FOAM RUBBER WRAP (EXTEND

6 in. (152 mm) BEYOND ENDS OF BULB)

CAPILLARY

TUBE

PIPE

DUCT

TAPE