Lockwood Concealed Electromechanical Hold Open Single Door Closer Silver FD480
Lockwood Concealed Electromechanical Hold Open Single Door Closer Silver FD480
The Lockwood FD480 is a concealed electromechanical hold-open door closer for single fire and smoke doors. It is fitted into the door and frame so it stays out of sight, holds the door open at a selected angle for normal daytime use, and releases the door to close and latch when the fire alarm cuts power (for example when a smoke detector activates).
Key Features
Specifications
| Application | Single doors, 350–1100 mm |
| Minimum door thickness | 40 mm |
| Hold-open range | 70°–120° (adjustable) |
| Maximum opening angle | 120° |
| Power size | Adjustable EN 1–4 |
| Electrical | 24V DC ±15%, max 60 mA per hold-open device |
| Mounting | Concealed; one unit suits push or pull side |
| Finish | Silver |
Door Closer Functions Explained
Power Size Guide
| Power size | Recommended door width (mm) | Max door weight (kg) | Closing torque (Nm) |
|---|---|---|---|
| EN 1 | 750 | 20 | 9–<13 |
| EN 2 | 850 | 40 | 13–<18 |
| EN 3 | 950 | 60 | 18–<26 |
| EN 4 | 1100 | 80 | 26–<37 |
| EN 5 | 1250 | 100 | 37–<54 |
Door height should be a maximum of 2340 mm.
Standards & Compliance
- Successfully fire tested up to 2 hours on fire door assemblies to AS 1905.1:2005 – Part 1: Fire Resistant Doorsets.
- Conforms to AS 1428 (Design for Access and Mobility).
Available Finishes
Swatch colours are indicative only. Living finishes develop a natural patina over time.
Warranty
Mechanical parts are warranted against defects in materials and workmanship under normal use, when correctly installed. Electrical and electronic components carry the manufacturer’s separate electronic warranty. Manufactured by ASSA ABLOY Australia. Lockwood warranty →
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 does hold-open mean?
Hold-open lets the door be parked open at a chosen angle and it closes once released. Important: a plain mechanical hold-open must not be used on a fire door — a fire door may only be held open by an approved electromagnetic (fire-alarm released) device, which drops the door shut automatically on alarm or power failure.
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.
What do the EN power sizes mean?
The EN power size (EN 1154) sets the closing force, and each size is defined by the door leaf's width and weight. As a guide: EN1 up to 750 mm / 20 kg, EN2 up to 850 mm / 40 kg, EN3 up to 950 mm / 60 kg, EN4 up to 1100 mm / 80 kg, EN5 up to 1250 mm / 100 kg, EN6 up to 1400 mm / 120 kg. A range such as EN 1–4 means the closer is adjustable across those sizes — a wider or heavier door needs a higher power size.
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.
