d.c _490 img_1

NHN 490 Series door closers incorporate the latest cam type technology, which offers easy opening with increased efficiency.

Incorporating the latest cam type technology, the NHN 490 series of door closers offers easy opening with increased efficiency on the closing torque.

The power is adjustable by allen key from EN2-4. The closing speed is easily adjusted via two independent adjustment valves. The slide arm can be fitted with a hold open device.

CE / EN3 approved to EU directives (89/106/EEC) by EN 1154:1996/A1:2002 and EN1634-1:2000. NHN 480 is backed up with a 10 years ‘No Quibble’ guarantee.

 

  • NHN 490 Series offers sizes EN2-4, spring power adjustable by allen key.
  • Back check function with cushion effect in track available.
  • Easy installation.
  • Easy speed and control adjustments by valve screws on the top of the closer body.
  • Slimline body.
  • Non-handed applications.
  • DS slide arm available for double swing action.
  • RAL9006 finish as standard with others available.

 

Power size
(EN)
Door width
(mm)
Door weight
(kg)
SLIDE ARMHOLD OPENBACK CHECKDOUBLE SWING
ACTION
285040490490S490BCC490DS
395060
4110080
CE EN3 ApprovedCECE

Introduction

d.c 490 img_2

 


Function

Closing & latching speed

The closing speed from maximum opening angle to 15° and the latching speed from 15° to 0° can easily be controlled by two independent valves on the top of the closer.

NHN 490 Series


Back-check function (optional)

This function is built into the track of the slide arm and gives a cushion effect to the outward swing of the door. Most suited where the opening door might hit a wall ie. in a corridor, or where it could injure someone if it opens too quickly. It is recommended for use on externally opening doors in windy environments.

The back check function is adjustable within the track. Recommended angle is between 70° and 85°.

IT SHOULD NOT BE REGARDED AS A DOOR STOP!NHN 490 Series1


Adjustment

For easy adjustment the closing speed screw, the latching speed screw are located on the top of the closer body.

The power adjustment screw by no. 490 Series is also located on the top of the closer body. The manual shows the setting and the number of turns required to change the power force of the no. 490 closer body.

The no. 490 series door closers are designed to allow a door opening angle of 110 o by using butt hinges with a maximum offset of 10mm. Using the door closers in top jamb application or using hinges with a different offset can limit the maximum opening angle of the door.

Using the optional DS slide arm and center pivot hinges the 490 door closer can be used on double swing action doors.

It is recommended to fit always a door stop.

NHN 490 Series3NHN 490 Series4


Installation

Standard installation

The closer body fitted into the door; the slide arm into the top jamb.

490 drawing1


Top jamb installation

The closer body fitted into the top jamb; the slide arm into the top of the door

490 drawing2

 


Double swing action installation

With the optional DS slide arm and using centre pivot hinges the door closer can be used on double swing action doors.

490 drawing3

Hold Open 

Hold open device in track

480 hold_open

Back Check

Back check cushion

490 bc cashion

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