Honeywell L4008, L4007 Mounting Immersion Well, Installing Direct Immersion Models L4006C, L6006B

SETPOINT

INDICATING DIAL

DIFFERENTIAL

ADJUSTMENT

WHEEL

ADAPTER CLAMP

SCREWS

INSERTION 1

ELEMENT

2

1 WITH VERTICAL MOUNTING OF IMMERSION WELL, ELEMENT IS ATTACHED TO BOTTOM OF THE CASE.

M8806A	2 SELECT MODELS HAVE SCREW
	TERMINAL, NOT TAB TERMINAL.

Fig. 6. Internal view of L6006A.

Installing Direct Immersion Models (L4006C, L6006B)

Models that provide for direct immersion of the sensing element into the boiler include a bulb compression fitting assembly instead of an immersion well. Install the fitting in the boiler tapping as follows:

1.Be sure the sealing washer is in place as shown in

Fig. 7. Make sure that the spud of the bulb compression fitting is screwed in tightly enough to prevent leaking.

ADAPTER

CLAMP

SPLIT SLEEVE

ADAPTER CLAMPS

FIT OVER

GROOVE

SEALING WASHER

BULB COMPRESSION

FITTING

SENSING BULB M8774A

Fig. 7. Direct immersion model with fitting partially removed.

L4006,7,8; L6006,7,8 AQUASTAT® CONTROLLERS

2.Insert the immersion sensing bulb through the bulb compression fitting. Adjust the adapter clamp so that the clamp fits over the groove at the opening of the bulb compression fitting.

3.Tighten the adapter clamp screws so that the Aquastat Controller is firmly attached to the bulb compression fitting.

Mounting Remote Bulb Models (L4008A,B,E; L6008A,G,H)

The remote temperature-sensing bulb can either be installed in an immersion well (See Fig. 8) that extends into the boiler or tank, or it can be directly immersed in the controlled medium (See Fig. 9). For installations that do not use a well, secure the remote bulb with a bulb compression fitting (See Fig. 10), or capillary compression fitting. (See Fig. 11).

Order well, well adapter, bulb compression fitting or capillary compression fitting separately. See form no. 68-0040, Wells and Fittings for Temperature Controllers. If used, well must snugly fit sensing bulb for the best thermal response. Insert bulb until it rests against the bottom of the well. Hold it there while tightening the tubing clamp. (See Fig. 8).

The boiler manufacturer usually provides a tapping for the insertion of the Aquastat Controller sensing element. This tapping should be located at a point where typical water temperature can be measured. Never locate the bulb or protecting immersion well close to a hot or cold water inlet or a steam coil.

If the system is filled, drain system to a point below the boiler tapping, or wherever the sensing bulb is to be installed.

The bulb can also be installed in the supply line of an indirect water heater, in the direct water heater itself, or in the feed riser, about 6 in. (153 mm) above the boiler. If the riser is valved, the bulb can be installed between the boiler and the valve.

NOTE: Do not make sharp bends or kinks in the capillary. Make bends no sharper than 1 in. (25 mm) radius.

After installing the controller, carefully coil the excess capillary at the bottom of the controller case.

Mounting Immersion Well

1.Screw the well into the boiler, tank, or pipe tapping.

2.Insert the bulb in the well, pushing the tubing until the bulb bottoms in the well.

3.Attach the retainer clamp to the end of the well spud. Loosen the draw nut and spread the jaws of the clamp with the screwdriver if necessary. (See Fig. 8).

4.With the retainer clamp attached to the well spud (be sure the jaws of the clamp hook over the ridge at the end of the spud, as shown at points A in Fig. 8), adjust the tubing to fit through the retainer clamp groove, as shown at point B in Fig. 8.

5.Tighten the draw nut so that the retainer clamp is firmly attached to the well spud and the tubing is held securely in place.

9 60-2104—10