Simer Pumps Condensate Pump 2520ULST - Manual (Page 4)

For parts or assistance, call Simer Customer Service at 1-800-468-7867 / 1-800-546-7867
Installation 4
With the unit plugged in and the discharge line installed,
fill the pump reservoir until the pump starts. Allow it to
pump down and shut itself off automatically to verify
proper operation through one complete cycle.
Safety Switch:
Most models include an automatic safety switch which
should be wired to activate an alarm or to cut off power
in the event of high water in the condensate reservoir.
If you must run additional wire from the low voltage
safety switch to the alarm or to the control wiring of your
furnace/AC unit, use at least 18 gauge (AWG) copper
wire rated at 105° C. Make connections with wire nuts
as shown.
If your installation allows interruption of heating or cool-
ing, follow procedure 1, below.
If your installation does not allow interruption of heating
or cooling, follow procedure 2, “Safety Switch Sounds
Alarm”.
Risk of electrical shock. Disconnect
power to furnace/AC unit and be sure condensate pump
is unplugged before starting procedure.
1. Safety Switch Shuts Down Furnace/AC
A. Make sure the pump is unplugged.
B. Find the red wire in the bundle from the thermostat
and disconnect it from the furnace/AC unit.
C. Connect the red wire to one of the white wires
from the safety switch as shown in Figure 1.
D. Connect the other white wire from the switch to the
furnace/AC terminal strip where the red wire from
the thermostat was connected.
E. Plug in the pump.
F. The furnace/AC will now operate as long as the
condensate pump empties the reservoir. If the reser-
voir overfills, the switch will open and cut off the
power to the furnace/AC.
Risk of freezing/overheating. This installa-
tion will shut down the furnace/AC unit if the water level
in the pump reservoir rises to within about 1/2" from the
top of the reservoir (thereby stopping the production of
condensate and preventing flooding), but it will not allow
the furnace/AC unit to restart until the condensate pump
reservoir is emptied. It should be monitored so that in
case of high water in the reservoir, corrective action can
be taken before freezing/overheating occurs.
NOTICE: When installing the pump in a new home or after
a renovation project, be sure that debris in the duct work
does not get into the reservoir; it will clog the system.
2. Safety Switch Sounds Alarm
A. Make sure the pump is unplugged.
B. Remove the two screws holding the motor cover to
the pump deck. Remove the cover.
C. Do not disturb the two yellow wires going through
the deck and into the motor (they are potted into
the top of the motor so there are no wire ends visi-
ble) .
D. Remove the white wire from the bottom terminal
(NC or Normally Closed) on the end of the safety
switch and reattach it to the upper terminal (NO or
Normally Open) on the end of the switch.
E. Run the white switch wires out through the notch
in the motor cover and replace the motor cover.
Make sure all wires (power cord and safety switch)
run through the notch. Hook the cover under the
catch on the deck and secure it with two screws.
F. Connect the white wires from the safety switch to
the alarm of your choice (purchase separately).
Consult the alarm manufacturer’s instructions for
correct connections to the alarm.
G. Plug in the pump.
White
Green Y
ello
w
Red
Condensate Pump
Furnace/A.C.
From Thermostat Wire Nut
White
White
Figure 1: Low Voltage Auxiliary Safety Switch
connection for Furnace/AC shutdown installation.
Plug pump into a 115-volt outlet
that carries power that will not be
interrupted. Do not connect pump to
a fan or limit control circuit or the like.
Some Models include an
auxiliary safety switch.
Connect switch as
explained in "Safety Switch".
5493 0906
Hazardous voltage. Plug pump into a
115-volt outlet. Pump is double insulated; grounding
is not required.
4