Crawlspace Alert
™
Installation
For small usage:
4201 Lien Rd., Madison, WI 53704
•
TOLL-FREE 1-800-533-7533
•
www.thermastor.com
•
TS-647 07/11
Unit Functionality
• The amber warning lamp illuminates if the relative humidity in the crawlspace exceeds the preset limit
(70% RH).
• If lamp is illuminated the homeowner should call their contractor, as this could signal a serious
moisture issue in the crawlspace.
• The optional “Overflow Shutoff” (step #2) will shut-off the dehumidifier if the condensate pump
reservoir overflows.
1. Mount the Crawlspace Alert
• At least 24" above ground level, making sure not to mount on an exterior wall (relative humidity can
be affected by the walls temperature).
• Locate the Crawlspace Alert within two ft. (length of power cord) of a dedicated 15 amp GFCI
power outlet and within 8 ft of your dehumidifier.
2. Overflow Shutoff feature (optional
)
Not using this? Then go to step #3
• Connect the gray 2-wire cable (8ft) to the 2 white wires on the condensate pump to interface with
the overflow switch (use supplied wire nuts).
• Plug-in the dehumidifier power cord and condensate pump power cord to the outlets on the side
of the Crawlspace Alert (max. 12amps).
•
Check the Overflow Shutoff:
• Plug the Crawlspace Alert power cord into a dedicated 15 amp GFCI outlet.
• While the dehumidifier is operating, lift up on the safety float switch or turn the pump
upside-down. The dehumidifier should turn off.
• If the operation is backwards (dehumidifier turns on when the safety float switch trips),
then the pump switch terminals will need to be swapped. Most pump switches have three
terminals yet only connect wires to two. One of your wires was probably connected to the
Normally Open terminal. You must change it to the Normally Closed terminal. Check the
functionality again. (Proceed to step #4)
3. Plug-in the power cords
• Plug-in the Crawlspace Alert to a dedicated 15 amp GFCI outlet.
• Plug the dehumidifier and condensate pump power cord into the side of the control box.
4. Install the warning lamp
• Install warning lamp in a location where it can be easily monitored. The mounting plate can be
flush mounted (A) or bracket mounted (B).
A. Flush mount: Flex the tab until it breaks away from the plate. Drill a 1/2" diameter installation
hole, and push the lamp through the hole, then slide the mounting plate over the wires and
push the lamp into the plate. Attach the plate to the mounting surface using adhesive or a
screw.
B. Bracket mount: Bend mounting plate to the desired angle. Slide the mounting plate over the
wires and push the lamp into the plate. Attach the mounting plate to the mounting surface with
a screw. Tie the lamp wiring up along its path and bundle any extra wire up, out of the way.
• Tie the lamp wiring up along its path and bundle any extra wire up, out of the way.
Note: To reduce the risk of electric shock, this product has a grounding type plug that has a third (grounding) pin. This plug will only fit into a grounding type
power outlet. If this plug does not fit into your outlet, contact a qualified electrician to install the proper outlet. Do not change the plug in any way.
