CRL Jackson® Adjustable Spring Power Multi-Size 90º Hold Open Extended Spindle Overhead Concealed Closer
 
Adjustable Spring Power Size 1 (Barrier-Free) to Size 4 (Regular)
Can Retrofit Existing Fixed Spring Closers
Standard and Extended Spindle Models
5 Year Limited Warranty

This CRL Jackson® Adjustable Spring Power Overhead Concealed Closer Body is designed for A.D.A. barrier-free applications and features a 7/8" extended spindle, the preferred length when used in conjunction with Patch Fittings or Rail Hardware on all glass doors. Its spring power is adjustable from a size 2 through 4 using Patented Dual Compression Technology providing finer spring tension adjustment and greater spring efficiency. With fully independent valves, this closer affords maximum adjustability when trying to balance building codes, stack pressure and keeping the door closed. It will easily retrofit most all fixed spring size Overhead Concealed Closers and is the choice of professionals the world over.

A.D.A. NOTE: Although the Adjustable Spring Power Door Closer can be adjusted to compensate for site conditions, adequate closing force might not be obtained while complying with A.D.A. opening force requirements.

Product Warning:

Closers set to comply with A.D.A. specified opening forces might not provide adequate spring power to control and close the door due to varying site conditions and door size. Mounting clips are not included with this closer body. Unless the existing mounting clips are used, you will need to purchase the appropriate clip package for your application. Contact Jackson® Technical Sales Department for assistance in selecting the correct Mounting Clip Package.
Most shipping weights are approximate and have not been verified.
 
PRODUCT DESCRIPTION:
 
 Jackson Overhead Concealed Door Closers (OHC) are available from C.R. Laurence as closer bodies only or as standard packages for center hung and offset door installations. The standard packages include the closer mechanism, mounting brackets, arms, and pivots. OHC's are divided into three groups: Standard OHC's (Brown) are offered with four (4) fixed spring sizes for doors from 2'6" to 4'0" wide (see chart on page 14). Other options include 90 degree and 105 degree hold open and non-hold open versions. Grade 1 OHC's (Black) have been tested to ANSI Grade 1 Standards (2 million cycles). They feature a valve adjustable hydraulic backcheck and are available in 90 degree and 105 degree hold open and non-hold open models. Adjustable OHC's (Blue) allow the opening spring force to be adjusted from 4.5 lbs. to 15 lbs. Adjustability is especially useful when attempting to balance between stack pressure and ADA requirements. The standard factory adjusted spring pressure is set to the size "Light Duty" and is intended for a 7'0" x 3'0" door. To increase the spring force by one size, turn the adjustment screw four (4) turns clockwise. Adjustable OHC's are also available in 90 degree and 105 degree hold open and non-hold open models. All Jackson OHC's are non-handed, double-acting, and work with center hung and offset applications. Additionally, the body size and mounting holes of standard and adjustable OHC's are identical and interchangeable with one another
 
The closer has been fully tested and adjusted at the factory. The closing and latching speeds have been pre-set to achieve a 6 to 8 second closing cycle. The optional hydraulic backcheck has not been factory pre-set. After installation, cycle the door 10 or more times from the maximum open position to the full closed position prior to making final adjustments. To increase either the closing or latching speeds, turn the appropriate adjustment valve counter-clockwise. To decrease either the closing or latching speeds, turn the appropriate adjustment valve clockwise. Set the latching speed (Valve "L") first, then set the closing speed (Valve "C"). Check and readjust if necessary. Hydraulic Backcheck (if so equipped) turn the adjustment valve clockwise to increase backcheck resistance which dampens and slows the momentum of the door when opened with excessive force. Decrease resistance by turning the adjustment valve counter-clockwise. The adjustment valve must not be adjusted so that the backcheck function is used as a rigid backstop. Using the backcheck as a rigid backstop may cause damage to the closer or door. Adjustable Spring Power (if so equipped) the adjustable spring power has been factory set to Size 2. To increase the spring power, turn the adjuster clockwise. To decrease, turn the adjuster counter-clockwise. Typical door opening force adjusts at the rate of approximately 1 pound of force (4.5 N) for each 3 to 4 revolutions of the adjuster. IMPORTANT: Do not attempt to adjust the spring power with the door open beyond 20 degrees from fully closed.