By definition a low energy power operated door is that which requires a knowing act (for example: pushing a wall switch or using a card reader) to start the automatic opening cycle. While this door is opening or closing, it cannot generate more kinetic energy than what is outlined in the standard meaning, it takes a minimal amount of force to stop the door. Force is measured in foot pounds.
The ANSI standard outlines the slower speed in which it travels and the hold open time delay before the door is allowed to close. Exact requirements are based on the door’s weight and width. Once opened, the door must remain open for a minimum of 5 seconds.
For example, if the door is 48” wide and weighs 175 lbs. the door operator should be adjusted as follows:
- Opening time to 80 degrees (backcheck): 5 seconds
- 80 degrees to full opening of 90 degrees: 1 second
- Hold Open Time Delay: 5 seconds
- Closing time to 10 degrees (latch): 5 seconds
- 20 degrees to close: 1.5 seconds
- Total Cycle Time: 17.5 seconds
- The force required to prevent door from opening or closing or to prevent a stopped door from opening or closing shall not exceed 15 ftlbs.
Proper signage is also mandatory.
A low energy power assist door reduces the force or effort it takes to push or pull the door open.
It is strongly recommended that an inspector certified by the American Association of Automatic Door Manufacturers (AAADM) inspect all automatic pedestrian doors at the time of installation and, at a minimum, annually. It is also recommended that a qualified professional maintain the doors on a regular basis according to the manufacturer’s instructions. A Daily Safety Check label, which is available through door manufacturers and service providers, should be installed on or near all automatic door equipment.
Von Duprin RG-27 Series
Von Duprin’s RG-27 Series Vertical Rod and Latch Guards protect the bottom rods of exit devices from the damaging impacts of carts or gurneys passing through doors. If bottom rods become damaged, the exit device will not function as intended and can jeopardize the ability to exit safely during an emergency.
In addition to protecting the vertical rod, the guard provides a smooth, unobstructed surface so the door can be pushed open easily with the bumpers of a wheelchair. The standard latch guard features a 45-degree ramp and a continuous ramp on full width or extended latch guard.
Latchguards can cover latches as large as 1 1/4” W x 10” H x 1 7/8”. They are constructed of stainless steel in US32D finish.
The Series includes:
RGO — Rod guard only (Projection 1³|16” (30mm)
RG-27 — Rod and latch guard.
RG-27-3 — 3’ (914mm) Rod Guard and Extended Latch Guard.
RG-27-4 — 4’ (1219mm) Rod Guard and Extended Latch Guard.
LGO — Latch guard only.
LGO-3 — 3’ (914mm) Extended latch guard only.