To wire as an alarm switch:
(Figure 5)
1. Unplug the condensate pump from power source
2. Use a screwdriver release the latch in the pump top cover.
3. Remove the safety switch (connected with two yellow lead wires)
4. Remove the yellow lead from the bottom (normally closed) terminal and replace it on
the middle (normally open “NO”) terminal.
5. Snap the switch back into place
6. Replace the top cover, making sure the latch locks the lid in place.
7. Connect the yellow leads from the pump safety switch to alarm device. Follow alarm
manufacturers instructions to correctly wire the alarm.
WARNING This installation will set off an alarm if the water level in the pump approaches
an overflow condition. Wiring the safety switch as an alarm switch
will not shut down the
appliance and stop the flow of condensate into the pump.
The alarm device must be
monitored so that corrective action can be taken before flooding occurs.
TESTING
Testing the Pump
1. Make sure the pump is plugged in to a properly grounded receptacle.
2. With the discharge line connected, fill the pump reservoir with water until the pump starts. Allow the pump to
discharge the water and shut itself off automatically to verify proper operation of one complete cycle.
Testing the Safety Switch
1. The air conditioner or furnace needs to be running to test the safety switch.
2. Unplug the condensate pump so that it cannot pump out water.
3. Pour water into the pump reservoir until it is almost full.
4. As the water level rises in the reservoir, the safety switch will engage and shut off the appliance OR sound the
connected alarm if connected.
5. Plug in the condensate pump and allow it to empty the reservoir. As the water level decreases the safety switch
should reset, allowing the appliance to restart, or shutting off the alarm. NOTE: Some appliances may not re-start
immediately due to a built-in delay circuit that prevents rapid cycling of the compressor.
MAINTENANCE
Unplug the pump and clean out the reservoir at the beginning and end of each
heating or air conditioning season. Using either soap and water or a mixture of one
cup of household bleach to 1 gallon of water, and cycle the pump several times. Pumps
with heavy algae build-up should consider installing Hartell’s AL-G-Gator, algae
prevention system on the condensate drain line. Remove any remaining bleach and
rinse the reservoir with water. Make sure that the pump chamber is sealed, and that
unit is properly re-assembled (see below).
Impeller Access Instructions:
1. Disconnect power to furnace/AC unit. Unplug the pump. Disconnect the tubing;
drain the pump.
2. Hold the pump with both hands and squeeze the snaps on the ends with your
thumbs to release the lid. Remove top portion of pump. (Figure 6)
3. Flip the lid and remove the screws. Then squeeze the opposing snaps on the
bottom of the pump chamber between thumb and index fingers. Start at the large
diameter. Once opposing snaps release. Rotate impeller cover about remaining
snap to remove the cover. (Figure 5)
4. Remove the O-ring from the pumping chamber and keep it clean.
5. Remove debris from the reservoir. Spin the impeller by hand to be sure it is not stuck or
clogged.
6. Check O-ring for wear, fretting and cracking. Replace as needed.
7. Clean the O-ring. It is Teflon coated so lubrication is not necessary.
8. Stretch the O-ring around the pumping chamber inside the snaps. (Figure 7)
9. Align the impeller cover with the pumping chamber and press down until the cover snaps
in place and reattach the screws.
10. Align the upper portion of the pump with the tank and press down until the snaps lock.
11. Test the pump using the above procedure.
Figure 6
Figure 7
A C
A L A R M
( N O T IN C L U D E D )
N O
N C
C O M M O N
Y E L
Y E L
N O
N C
C O M M O N
Y E L
Y E L
Figure 5
