Chief Manufacturing Dual Stud Wall Arm CTA-225 ユーザーズマニュアル

Installation Instructions 

CTA-225 

 

 

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1.  Locate two lag bolts (40) and two flat washers (50).  

2.  Using a 15/64” drill bit, drill two pilot holes for 

anchoring the bottom stud-spanning adapter (20). 

3.  Using two 5/16” lag bolts (40) and two 5/16” flat 

washers (50), secure the bottom stud-spanning 
adapter (20) on the wall. See Figure 5. 

•  The front cover may be partially removed and 

reinstalled to conceal power/audio/video cables 
after the TV/Mount is installed. 

•  You may remove one or both knockouts on 

cover to assist routing to wall through cover. 

1.  Locate front cover (30) and four M4 8mm Phillips 

head cap screws (90). 

2.  Install the front cover (30) using four M4 8mm 

Phillips head cap screws (90). See Figure 6. 

 

1.  Locate M6 x 6mm set screw (100) and 1-1/2” NPT 

pipe or nipple (supplied with TV Mount or 
purchased separately). 

2.  Connect the 1-1/2” NPT pipe or nipple (supplied 

with TV Mount or purchased separately) to the wall 
arm (10). See Figure 7. 

3.  Using the M3 Allen key (110, supplied), install the 

M6 x 6mm set screw (100). Tighten the set screw. 

Make sure to tighten the M6 x 6mm set screw (100) 
to prevent equipment damage or personal injury.