Simer Pumps Condensate Pump 2520ULST - Manual (Page 5)

Installation / Maintenance 5
For parts or assistance, call Simer Customer Service at 1-800-468-7867 / 1-800-546-7867
H. Risk of Flooding. With installation
No. 2 (“Safety Switch Sounds Alarm”), the alarm is
activated when the water level in the reservoir is
within about 1/2" of the top of the reservoir.
However,
the furnace/AC unit will continue to pro-
duce condensate because the alarm will not shut it
down. Monitor the installation so that in case of
high water level in the condensate reservoir you
can take action before the reservoir overflows and
flooding occurs.
Testing Auxiliary Safety Switch:
NOTICE: Some appliances may not start immediately
due to a built-in delay circuit that prevents rapid cycling
of the compressor.
1. Start appliance.
2. Unplug the condensate pump so that it cannot
pump out.
3. Pour water into the pump reservoir until it is
almost full.
4. As the water rises in the reservoir, the safety switch
should shut down the appliance or set off the alarm
(depending on the installation procedure used).
5. Plug in the condensate pump and allow it to empty
the reservoir. As the water level goes down in the
reservoir, the safety switch should reset, allowing the
appliance to start or shutting off the alarm.
MAINTENANCE
1. Disconnect the power to the furnace/AC unit and
unplug the pump.
2. Disconnect the tubing to the pump. Drain the tubing
into a container.
3. Remove the two mounting screws and remove the
pump from the furnace or wall. Dump the reservoir
into a floor drain or container.
4. After you have dumped the pump, remove the four
screws securing the reservoir to the pump deck. Lift
the deck/pump assembly off of the reservoir.
5. Turn the deck/pump assembly upside down and
remove the five screws holding the impeller cover to
the motor.
6. Remove the impeller cover. The rotor/ impeller
assembly may come out with it. If not, pull it out of
the rotor chamber in the motor. (You may have to
pull it hard to get it out against the magnetism in the
motor windings.)
7. Clean the impeller, rotor, rotor cavity, and O-Ring.
Use a rag to clean the O-Ring groove in the impeller
cover and the sealing surface on the bottom of the
motor block.
8. Clean out the reservoir.
9. Reassemble the impeller and the impeller cover;
tighten the screws carefully. Do not overtighten!
10. Turn everything right side up and reassemble the
reservoir to the deck. Be sure the impeller cover fits
into the molded ring in the bottom of the reservoir.
Fasten the reservoir with the four screws at the
corners.
11. Reinstall the pump on the furnace.
12. Plug in the pump, fill the reservoir, and run the
pump through one complete pump-down cycle to
be sure it works correctly.
13. The pump is ready for operation.
CLEANING THE CHECK VALVE
1. Unplug the condensate pump.
2. Remove the discharge line from the check valve.
3. Use a 9/16" wrench to remove the check valve from
the pump deck.
4. Inspect the valve for obstructions or damage. Clean
or replace it as needed.
5. Thread the valve back into the pump discharge by
hand, plus 1/2 turn with the wrench.
NOTICE: Don’t overtighten the valve, as over-
tightening can distort the O-Ring that seals the valve,
causing leaks.
6. Plug in the pump, fill the reservoir, and run the
pump through one complete pump-down cycle to
be sure it works correctly.
7. The pump is ready for operation.
Safety Switch Safety Switch
1. Move white lead
from NC terminal to
NO terminal
as shown.
Common
2. Connect both
white leads to
alarm with wire
nuts as shown
Alarm
White
White
C
NO NC
1
2 3
Common
White
White
C
NO NC
1
2 3
Figure 2: Low Voltage Auxiliary Safety Switch connec-
tion for alarm circuit installation (does not shut down
furnace/AC unit).