Lockwood Concealed Mechanical Door Coordinator for Double Doors Silver FD481 - primehardware
Lockwood Concealed Mechanical Door Coordinator for Double Doors Silver FD481 - primehardware
Lockwood
SKU: FD481

Lockwood Concealed Mechanical Door Coordinator for Double Doors Silver FD481

$2,565 $2,644.32
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Lockwood

Lockwood Concealed Mechanical Door Coordinator for Double Doors Silver FD481

Product code: FD481

The Lockwood FD481 is a concealed mechanical door coordinator for double doors where the active leaf is used as the passage door. It keeps the active leaf open while the inactive leaf is open, then closes the active leaf once the inactive leaf is almost closed so the leaves close and latch in the correct order.

40 mm (FD481, size 1–4)SilverFire & smoke doors

Specifications

Application Double doors, hinge distance 1100–2100 mm
Non-fire model Suits double doors to 2800 mm / 100 kg leaf
Minimum door thickness 40 mm (FD481, size 1–4)
Maximum opening angle 120°
Mounting Concealed
Finish Silver

Door Closer Functions Explained

Door coordinator. On a pair of doors, the coordinator makes the leaves close in the correct order — it holds the active (passage) leaf open until the inactive leaf has closed, so both doors close and latch properly. It works alongside the door closers, not in place of them.
Hold-open versions are also available — they park the door open at a set angle and close once released. A mechanical hold-open must not be used on a fire door unless it is an approved electromagnetic (fire-alarm released) hold-open.
Other functions offered across this closer range: Backcheck slows the door as it nears the fully open position so it can't slam into an adjacent wall (protecting the hinges, frame and wall) and delayed action holds the door open, or closes it slowly, for the first part of the swing to give extra time for wheelchairs, prams and trolleys. This model includes the functions listed above.

Standards & Compliance

  • Successfully fire tested up to 2 hours on fire door assemblies to AS 1905.1:2005 – Part 1: Fire Resistant Doorsets.

Available Finishes

SilverSatin Stainless SteelBlackGold

Swatch colours are indicative only. Living finishes develop a natural patina over time.

Warranty

✓25-Year Mechanical Warranty

Mechanical parts are warranted against defects in materials and workmanship under normal use, when correctly installed. Manufactured by ASSA ABLOY Australia. Lockwood warranty →

In stock. Silver and Black finishes are normally held in stock with the supplier. Other finishes are made to order — call Prime Hardware on 1800 329 028 to confirm availability and lead time.
How does the hold-open / coordinator work?

In normal use the door(s) are held open. When power is cut — for example when a smoke detector activates — the door releases and closes and latches. On double-door units a coordinator closes the leaves in the correct sequence.

Is it fire rated?

Yes. This family is fire tested on fire door assemblies to AS 1905.1:2005 – Part 1: Fire Resistant Doorsets. Check the Standards & Compliance section for the tested duration of this model.

Is it hard-wired?

The electromechanical hold-open runs on 24V DC (±15%, ~60 mA) and is wired into the building's fire-alarm/detection system so it releases on alarm.

What is backcheck?

Backcheck slows the door as it nears the fully open position so it can't be flung into an adjacent wall — protecting the hinges, frame, closer and wall. It is a cushioning feature, not a hold-open, and is useful in windy or exposed locations. Only closers whose title lists backcheck have this fitted.

What is delayed action?

Delayed action holds the door open, or closes it very slowly, through the first part of the swing before returning to normal speed — giving extra time for wheelchairs, prams, trolleys or moving furniture. It is common in hospitals and aged care. Only closers whose title lists delayed action (DA) have this fitted.

Is this finish in stock?

Silver and Black finishes are normally held in stock with the supplier. All other finishes (and no-finish/raw components) are made to order — call Prime Hardware on 1800 329 028 to confirm availability and lead time before you order.

What warranty applies?

Lockwood products carry a 25-Year Mechanical Warranty against defects in materials and workmanship. Electrical/electronic components, where fitted, carry a separate electronic warranty. Manufactured by ASSA ABLOY Australia.

How can I get help?

Call Prime Hardware on 1800 329 028, email sales@primehardware.com.au, or visit the showroom at 2/249 Annangrove Road, Annangrove NSW 2156. We can confirm sizing, finishes and matching components before you order.