Dormakaba 8900 JT Manual de usuario

8900 JT/JTH

Jamb track pull side mount with

hold open (JTH) and backplate (BP89)

Installation instructions

08280161 – 09-2019

| EN |

28900 Surface Applied Closers 09-2019

08280161

dormakaba 8900 JT/JTH Installation Instructions Table of Contents

Table of contents

1 Technical specifications 3

. Overview 

. Tools recommended 

. Handing the door 

2 Instructions - track mount 4

. Installing backplate and surface closer 

. Assemble and secure track 

. Securing main arm to closer 

3 Adjustments 6

. Adjust closing speeds: sweep, latch, backcheck,

delayed action 

. Adjust hold open (optional) 

. Adjust spring force 

4 Install covers 7

dormakaba 8900 JT/JTH Installation Instructions

08280161 09-20198900 Surface Applied Closers 3

Technical specifications

1 Technical specifications

. Overview

Caution: sex nuts are required for attachment

of components to unreinforced doors and to

wood or plastic faced composite type fire doors,

unless an alternative method is identified in the

individual door manufacturer’s listings.

Maximum door opening degree is 180°.

Arrow on backplate points upward.

Hold open range is from 80° to 145° with

optional hold open kit.

Know the swing of the door which is being

installed prior to installation.

Verify closer spring size prior to installation.

Make sure door efficiently operates prior to

installing closer.

Drill bits: # Phillips screwdriver

Metal: /” drill bit; /-

tap

/” flat head screwdriver

Wood: /” and /” bit mm hex key

/” box wrench

. Tools recommended

Table 

. Handing the door

Fig.

Hinge Hinge

Interior side of door

Left hand door (LH) Right hand door (RH)

Exterior side of door

dormakaba 8900 JT/JTH Installation Instructions

08280161 09-20198900 Surface Applied Closers

Backplate and surface closer

Track

2 Instructions - track mount

. Installing backplate and surface closer

. Assemble and secure track

Fig.

Fig.

BP LH

.. Reference template  and

.

.. Secure backplate. Arrow points downward.

.. Secure closer body.

NOTE: Ensure pinion is oriented toward the hinge.

Pinion

.. Attach arm to slide shoe using

screw supplied.

.. Tighten securely.

.. Insert slide shoe, rubber stop, hold

open mechanism (if necessary), and

end blocks into track.

.. Secure track to door.

NOTE: JTH Units ONLY: Hold open

mechanism and slide shoe must be

installed with arrows pointing AWAY from

the door hinges.

NOTE: Mounting screws pass through

end blocks.

End block Slide

shoe

End

block

Rubber

stop

Hold open

mechanism

Hold open

mechanism

Arrow

Screw

dormakaba 8900 JT/JTH Installation Instructions

08280161 09-20198900 Surface Applied Closers 5

Main arm

. Securing main arm to closer

Fig.

.. Preload arm by placing wrench on

bottom pinion.

Main arm

Pinion

screw

PINION

45°

Hinge

.. Rotate wrench ° AWAY FROM hinge

edge of door.

.. With main arm parallel to door,

place main arm onto top pinion.

.. Secure arm to closer with pinion screw.

View from top of door

Pinion

45°

dormakaba 8900 JT/JTH Installation Instructions

08280161 09-20198900 Surface Applied Closers

Adjust closing speeds

Adjust hold open

3 Adjustments

Confirm closer spring size prior to making any

closing speed adjustments.

Do not back valve heads out beyond closer casting. Door should close in  to  seconds from º.

Maximum opening angle is º.

Do not close valves completely.

. Adjust closing speeds: sweep, latch, backcheck, delayed action

Fig.

Increase

Decrease

Increase

Decrease

Backcheck &

Delayed Action

Sweep & Latch

.. Adjust closing sweep speed: ° to start of latch speed.

• Increase sweep speed: Turn valve counter-clockwise

• Decrease sweep speed: Turn valve clockwise.

.. Adjust closing latch speed: ° to close.

• Increase latch speed: Turn valve counter-clockwise

.. Adjust opening backcheck: beginning at °.

• Increase resistance: Turn valve clockwise

• Decrease resistance: Turn valve counter-clockwise.

.. Adjust closing delayed action: angle ° to start of sweep.

• Increase delayed action: Turn valve clockwise

• Decrease delayed action: Turn valve counter-clockwise

DEL

POS

. Adjust hold open (optional)

Fig.

OFF

.. Place the hold open mechanism in desired

position and tighten screw.

.. To adjust hold open force:

• To increase = turn CW

• To decrease = turn CCW

.. To enable: push white slide into hold open

mechanism.

.. To disable: pull white slide away from hold open

mechanism.

dormakaba 8900 JT/JTH Installation Instructions

08280161 09-20198900 Surface Applied Closers 7

Adjust spring force

Secure covers

. Adjust spring force

Fig.

Increase

Decrease

8916 - supplied with a size 4

8956 - supplied with a size 6

8916 ONLY - Barrier free openings: Take an opening

force reading from the pull on the door. If required,

adjust the spring force to meet the barrier-free

requirement.

• Decrease force: turn counter-clockwise;  turns max.

• Increase force: turn clockwise;  turns max.

Depending on opening conditions, a door adjusted to

meet barrier-free forces may not have sufficient power

to reliably close and latch the door.

Track mount

Closer size Max door

weight (lbs)

Door width Full turns

Interior



  ’ 

  ’” +

  ’ +

   ’” 

+  ’ +

4 Install covers

Fig.

Snap valve

adjustment

wrench inside

cover.

.. Place tab in cover slot, opposite main

arm.

.. Place cover over closer and fasten

securely with screws provided.

www.dormakaba.us

dormakaba

DORMA USA, Inc.

T: 800-523-8483

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