Myers Emergency Power Systems, LLC
44 S. Commerce Way
Bethlehem PA 18017
610-868-
3500 ǀ www.MyersEPS.com
3
Installation
In order to install the RLY-SW-2 in accordance with national/local code requirements, a qualified
electrician should review and understand the installation instructions: Check voltage and current
requirements. Verify and lock out circuit breakers on both regular (utility) power and 24 hours emergency
generator or inverter circuit. Install a self-adhesive 2" x 3" caution label in each fixture or load controlled
by an RLY-SW-2 indicating that the load is supplied from 2 different power sources: normal and
emergency. Review wiring diagram and connect wires, one at a time, in accordance with the numeric
identification.
In order to provide a safe light level, when regular power is interrupted, it is recommended that a minimum
5000 lumen are controlled by a 24 hour emergency circuit and are spaced no farther than 24' in any
direction from each other in a normal 9' white ceiling environment.
Initial Testing and Troubleshooting
In a new installation, where hundreds of devices may be used, each having as many as 14 wires to be
correctly connected, it is important that a fast, convenient method is used to check connections. In order
to test that the wires are connected correctly, without any inconvenience to occupants, do not turn off
regular (utility) power until you have checked each device as follows:
1. Check that regular branch circuit breaker is connected and utility power is available. The green LED
should be lit. If the green LED is not lit, check connections and continuity to branch circuit breaker.
2. Check that the emergency branch circuit breaker is connected and emergency power is available.
The red LED should be lit. If the red LED is not lit, check the connections and continuity to the branch
circuit breaker.
3. Normal Operation Test: Turn the room switch or other control device to the “ON” position. Normal and
emergency lights should turn on. Turn the room switch or control to the “OFF” position. Normal lights
should turn off immediately. If the blue loop is connected, emergency lights should stay on for at least
2.5 seconds. If the blue jumper is cut and capped, emergency lights should turn off immediately.
4. Emergency Operation Test: Press and hold the test button. Emergency lights should illuminate at full
brightness until the test button is released.
Maintenance
No maintenance is required to keep the RLY-SW-2 functional. However, regular testing should be
performed when the lamps, ballasts, LED drivers, or arrays have been replaced or when remodeling has
taken place.
Single Line Drawings
On a 20 Amp circuit, one RLY-SW-2 can control up to
-
20
Amps of emergency lighting load, or twenty RLY
SW-2s can each control one Amp of emergency
lighting load. One RLY-SW-2 is required per switch leg
or zone.
