Honeywell ml7984b ユーザーズマニュアル

ML7984B 

SPECIFICATIONS •INSTALLATION 

FIG. 1 -- DIMENSIONS OF ML7984 VALVE ACTUATOR IN MM (INCHES). 

FIG.2 -- MINIMUM MOUNTING CLEARANCE. 

1. Installer must be a trained service technician. 
2.  DO NOT electrically operate the ML7984 
before assembly  to the valve because damage 
not apparent to the installer may occur. 

2. Although the actuator can be mounted in any position, it is 
preferable that the ML7984 is mounted above the valve body. 
This will minimize the risk of damage to the ML7984 in the 

1.Ensure that the valve body is installed correctly, that is, the
 arrow points in the direction of the flow. 

event of condensation or a valve gland leak. 
3. Remove the stem button (Fig. 3) from the valve stem. 
4. Slide the position indicator (plastic  disk or rubber O-ring) 
over the valve stem. (See inset, Fig. 3) Indicator will self­
align to the marking on the yoke after one complete operating 
cycle. 

1. The drive shaft of the ML7984 has a threaded hole to link 
with the valve stem. Slide the yoke over the valve bonnet 
(Fig. 4) 
2. Thread the ML7984 drive shaft onto the valve stem all the 
way, until it is completely attached (with no threads 
showing), by turning the valve actuator in a clockwise 
direction, as viewed from above (depending on the valve 
models, use a pin or wrench to keep valve stem from turning). 
Note that the valve actuator is shipped with drive shaft in the 
mid-position. 

4. Orient the conduit hole to the most desirable direction, then 
tighten the LOCKNUTS on the U-bolt. 

3. Care should be exercised when using the TOOLS on the 
valve stem during tightening. (Fig.4) DO NOT damage the 
threads or other parts of the stem. 

3