Wattstopper ELCU 200, Emergency Lights are very dim when Test Loop is open.

[BJdittman]

If anyone is knowledgeable about the Wattstopper ELCU 200 in conjunction with the LMRC 211 I have a question based on the current desires of the customer.

Modules Used:
ELCU - 200 (Emergency Control Unit)
LMRC - 211 (Control Panel)
LMSW - 101 (One Button Light Switch)
LMDC - 100 (Occ Sensor)
LMCT - 100 (Programmer)

Customer Wants: When the fire alarm system goes off for any reason they want the Emergency Lights in the building to go to 100% no matter what.

They are only providing one circuit for us for the ELCUs, is it possible to share the same circuit for emergency and normal power? We cut the test loop wire (Blue wire) and put it on an NC Relay circuit in the Fire Alarm System. Everything seems to work just fine but when the Fire Alarm goes off, or we disconnect the Test Loop the lights on the emergency only shine very dimly, making very little difference in a dark room. If you disconnect the dimming wires from the Emergency Lights during that state the lights shine at 100%.
Is there something in the programming? Something wired funny?

 

[brantmacga]

Did you also disconnect power to the LMRC?

The fixtures should go full-on when power is cut on the normal supply side.

DLM Room Controller, 1 Relay, 0-10V Dimming, USA | Load Controllers | Digital Lighting Management | Lighting Controls and Systems

LMRC-210 Series Digital Room Controllers include one, two or three relay(s) to switch a total of 15 or 20 amps, a highefficiency switching power supply and one 0-10 volt output per relay for control of dimmable loads including electronic ballasts (Advance Mark 7, or equivalent). They are the...

www.legrand.us

Go to the supporting documents tab and read the emergency lighting bulletin.


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[tank728]

Brantmacga hit the nail on the head. Constant power must be removed from the lmrc in order for the lights to go full bright. As you can see from your wiring diagram the elcu does not affect the dimming circuit (0-10). When power is lost to the lmrc it opens the dimming circuit, enabling the lights to go full bright

 

[tank728]

Perhaps a product like or similar to the lmdi could be more useful in this situation

 

[brantmacga]

Thinking over this again, you’re going to need a shunt relay. Because a fire alarm signal doesn’t equate to a power loss. So the only way to get full-on levels from the emergency lights is to disconnect normal power and the dimming circuit, and you’ll need a shunt relay to do that.

Here’s a Wattstopper part …

Emergency Shunt Relay | Architectural Dimming | Lighting Control Panels | Lighting Controls and Systems

Legrand's Emergency Shunt Relay can simultaneously bypass both a line voltage switch and a 0-10V dimming signal, ensuring that an emergency fixture illuminates at full brightness during a utility power interruption.

www.legrand.us

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