CSW RECTORSEAL SAFE-T-SWITCH SS500EP Operational manual

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
ComponentList:
(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
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SAFE-T-SWITCH®SS500EP
For primary drain pan

Page 2 of 3
IMPORTANT SAFETY INFORMATION:
1. This device must be installed strictly in accordance with manufacturer’s instructions (to ensure proper operation) and in accordance
with all applicable local plumbing, drainage and electrical codes.
2. Electric shock hazard. Disconnect power supply before installing this product to avoid electrical shock and/ or equipment damage.
 UseinClass2(thermostat)circuitonly,nottoexceed24-volts,1.25ampstoavoiddamageorrehazard.
1. This device will not detect clogs occurring upstream from the installation point.
2. If not present, it is recommended that a fuse and time delay be installed, to protect the 24-volt circuit and avoid rapid cycling of equipment,
prior to installing this product.
3. Thisproductisintendedforuseinwateronly.Notforuseinthepresenceofammableliquidsorvapors.
4. Refer to the appropriate HVAC equipment operation manual prior to installing this product.
5. Do not use on dual compressor systems.
WIRING
1. Disconnect power to unit at main panel prior to performing electrical work. 2. If not
present, it is recommended that an inline fuse be installed to protect the 24-volt circuit. 3. Connect
"power" (black) wires to 24 VAC power supply terminal. 4. Locate the 24-volt thermostat cable
entering the air handler unit. 5. Disconnect or cut the red wire and connect to "common" (gray)
switch lead using wire nut. Connect "NC" (purple) switch lead to air handler terminal. Incorporating
switch in red circuit shuts down entire unit. If placed in the yellow circuit, fan continues to run
(inhibits mold during long absences).
*This is general wiring instruction for Normally Closed (NC) cirucuits. For Normally Open (NO)
switching, use "Common" (gray) and "NO" (orange) switch leads. Read air handler installation
manual for the shut-off signal type (i.e. NC or NO) and signal terminal locations.
Note: The CPU is plenum rated but the lead is not and must remain outside of plenum
space!
MAINTENANCE
TESTING: (Turn on power to A/C unit)
SWITCH:
1. Once installed and the power is turned on, CPU will display a green LED. If the green LED does not come on, check the "Power" (black) wire
connection and voltage. 2. Test the switch by shorting across the probes with wet finger, a metallic conductor or water. If wired correctly, the unit
will stop and the red LED will come on after about 5 seconds. When released, after about 5 seconds the red LED will go off, the green and amber
LEDs will come on and the A/C unit will restart. The amber LED will be turned off automatically in about 4 days. To turn off amber LED manually,
see reset instruction tag on probe wire.
SENSOR POSITION:
3. Test the sensor position: Test the sensor position by turning on the A/C unit to produce a normal condensate flow. If the sensor is too low, the
switch will activate and shut down the unit. Next, block the drain to allow the pan to fill with water. The switch should activate before the pan
overflows. If necessary, adjust the sensor as described above.
SPECIFICATIONS
24 VAC, 5 Amp. Switching Capacity, Class 2, 12”, 18 AWG Lead Wires, 72” plenum rated tail.
IND. CONT. EQ.
25XE
UL 508
UL 2043
Switch
24V Power Supply
NC Common
Red Yellow
Green
White
From Thermostat
Wire Nut
Figure 2: Wiring Diagram for Unit Shutdown
SAFE-T-SWITCH®SS500EP
For primary drain pan

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Limited Warranty
RectorSeal, LLC makes the Limited Express Warranty that when the instructions for storage and handling of our products are followed we warrant our products to be free from defects. THIS LIMITED EXPRESS
WARRANTY IS EXPRESSLY IN LIEU OF ANY OTHER EXPRESS OR IMPLIED WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, AND OF ANY OTHER
OBLIGATION ON THE PART OF RectorSeal, LLC. The sole remedy for breach of the Limited Express Warranty shall be the refund of the purchase price. All other liability is negated and disclaimed, and RectorSeal,
LLC shall not be liable for incidental or consequential damages.
Manufactured by
RectorSeal, LLC
2601 Spenwick Drive Houston, TX 77055, USA 800-231-3345 Fax [phone] rectorseal.com
A CSW Industrials Company.RectorSeal,thelogosandothertrademarksarepropertyofRectorSeal,LLC,itsafliatesoritslicensor’sandareprotectedbycopyright,trademarkandotherintellectualpropertylaws,
andmaynotbeusedwithoutpermission.RectorSealreservestherighttochangespecicationswithoutpriornotice.©2021RectorSeal.Allrightsreserved.R50109-0721
The information contained in this drawing is the sole property of RectorSeal. Any reproduction in part or as a whole without the written permission of RectorSeal is prohibited.
Item No. Part Number Description Quantity
1--- SE-4P Probe 1
2--- UL tag, SE-4P & CP-1P 1
3--- Reset Instruction tag 1
4--- Central Processing Unit CP-1P 1
Safe-T-Switch SS500EP Assembly
SIZE DRAWING REV SCALE WEIGHT
ANumber Date 1:2 ––
ASB00208 8/15/2016
1
2
34
6 ft long
Sensor wire 1 ft long
lead wires
SAFE-T-SWITCH®SS500EP
For primary drain pan