NHN85VP-BC 85V NHN Silver Variable Power Size 4-6 Overhead Door Closer with Backcheck Function

Description

The D&E NHN80VP series of door closers are a multi-size range of door closers. It has successfully been type tested to BS EN 1154 and BS EN 1634-1 and is accredited with CE certification where applicable, the NHN80VP series is backed up with a 10 years 'No Quibble' Guarantee. All models are supplied complete with a parellel shoe to enable standard arm and parallel arm installations without dropping in performance.

These are the non hold open models in Silver, also available with Backcheck (BC) or Delayed Action (DA).

NHN83VP - Size 2-4

Power adjustment: variable via a 5mm hex key

Door Weight: 40 - 80kgs

Door Width: 850 - 1100mm

NHN85VP - Size 4-6

Power adjustment: variable via a 5mm hex key

Door Weight: 80 - 120 kgs

Door Width: 1100 - 1400mm

NHN87VP - Size 6-7

Power adjustment: variable via a 5mm hex key

Door Weight: 120 - 140 kgs

Door Width: 1400 - 1600mm

All models are supplied complete with fixing screws for timber and steel doors and full installation instructions.

Functions:

Latching action (Standard):

This is the acceleration of the door in the final 2° of closing. It is designed to overcome any resistance caused by seals, latch bolts etc... This also provides the complete and secure closure of the door.

Backcheck (BC) (Optional):

This is the checking of the outward opening door. This function works between 70° & 85°. The function on a closer is designed for use were the opening door might hit a wall for example in a corridor. Other recommended installations are on externally opening doors that may be subject to wind, or where the door might injure someone if it was opened too quickly.

The backcheck strength can be adjusted via the 'backcheck valve screw' located on the end of the closer body.

NOTE: THE BACKCHECK OPTION SHOULD NOT BE REGARDED AS A DOOR STOP.

Delayed Action (DA) (Optional):

This is the slowing down of the closing speed. This function allows people sufficient time to pass through the door opening i.e wheel chair users, the elderly, hospital staff with beds etc... The maximum delay of 90 seconds is achieved between 180° thru to 85°, after which the normal closing process takes effect to provide the complete and secure closing of the door.

The delay can be adjusted via the 'delayed action valve screw' located on the closer body next to the spindle.

Force adjustment:

Installation "A" Decreases the closing force by about 10% for the first 4° of closing.

Installation "B" Increases the closing force by about 10% for the first 4° of closing.