Description
Safe-T-Switch® Model SS500EP electronic overflow switch is installed on primary drain pan
when plenum rating is needed. Small size and slim profile great for use on commercial
rooftop downflow units. The SS500EP's logic circuit continuously samples the probes for
water and shuts down the system if water is detected.
Code Size Qty. per Case Lbs. per Case Cubic Ft per Case
97693
Safe-T-Switch SS500EP
24 71 1.11
Packaging
Component List:
(1) Central processing unit
(2) 4P Probe
(3) Reset instruction tag
(4) Warning Sticker (not shown)
Installation Instructions:
Notice: Failure to read and comply with all warnings, cautions and instructions prior to starting installation may cause personal injury and/or property
damage and void the warranty.
Warning: Disconnect power to unit at main panel prior to performing electrical work. If not present, it is recommended that an inline fuse be
installed to protect the 24 VAC circuit.
INSTRUCTIONS
PRIMARY PAN INSTALLATION (see Fig. 1):
1. Route the plenum rated wire and sensor into the plenum space using the HVAC system manufacturer’s supplied raceway or conduit.
2. If necessary, remove the bracket from the sensor before routing.
3. Clip the bracket onto the side of the pan where water level is the highest and press firmly in place, positioning the wires up and probes down.
4. Adjust the sensor height by pushing the sensor into the bracket. The bracket is a one-way ratchet mechanism. If the sensor is set too low in the
pan, push the sensor from the lead side until it disengages from the bracket, then reset.
5. Adjust the sensor so that the probes are below the rim of the pan.
6. The switch will trip when the water level reaches the probes.
Figure 1: Installation on drain pan
Sensor
Drain Pan
Clip/Bracket
Probes
PRODUCT DATA SHEET
Page 1 of 3
SAFE-T-SWITCH
®
SS500EP
For primary drain pan
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