How do you replace a Honeywell Type L8148A Aquastat?

Answer 1

From Honeywell:

Turn off all power and remove the old control. Refer to

the cover insert of the old control to identify and tag each

external lead as it is disconnected. If old well is

unsuitable for new installation, remove it and proceed

with instructions for new installation. If old well is suitable,

use it and a 124904 immersion well adapter (ordered

separately from form 68-0040, Wells and Fittings for

Temperature Controllers) for the installation. (If the well

clamp fits directly over the flange of the existing well

spud, adapter use is not necessary.) The adapter has a

flange at the wide end that fits into the well clamp and is

slotted lengthwise to accommodate both the capillary

tube and the short length of tube extending from the bulb.

1. Loosen but do not remove the well clamp screw on

the side of the control case.

2. Pull out the capillary until the bulb bottoms in the

well. Place adapter (if used) around the capillary

tube so it fits into the slot. See Fig. 2. Center the

loop of excess capillary tubing in front of the

immersion well so it cannot touch any electrical

parts.

NOTE: Some models have a tubing length adjustable to

3 in. (76 mm). For these models, extra tubing

inside the case can be pulled out, if needed.

3. Make sure the wide end of the adapter fits into the

hole in the case. Position immersion well clamp

snugly over the flange on the adapter and tighten

the clamp screw.

4. Insert sensing bulb into well as shown in Fig. 2.

(Distribute the heat-conductive compound in the

tube prior to bulb insertion.)

5. Securely tighten setscrew (if present on old well)

against adapter.

BRACKET POSITION FOR

VERTICAL MOUNTING

BRACKET POSITION FOR

HORIZONTAL MOUNTING

M8890