Field Controls 20+UL User Manual

CONDENSATE PUMP

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Model: 20+

The Field Controls Condensate Pumps are designed to automatically
remove the liquid from an air conditioner evaporative coil and/or a gas
condensing warm air furnace. This pump is made from a tough ABS
plastic so it will resist corrosion and impacts.

ITEMS INCLUDED

1) UL & cUL Listed Condensate Pump with 6' power cord 1) Check Valve to prevent backflow of liquid into the unit

1) Overflow Safety Switch (Models 20+ULS and 20+ULST only) 1) 20 Feet of 3/8" I.D. Plastic Tubing (Models 20+ULT and

1) Instruction Sheet ULST only)

MODELS AVAILABLE

MODEL VOLTAGE CURRENT

20+UL 115VAC/60Hz 1.45 Amps 46296901 Base Model
20+ULS 115VAC/60Hz 1.45 Amps 46296902 Base Model with Overflow Safety Switch
20+ULT 115VAC/60Hz 1.45 Amps 46296903 Base Model with 20’ Flexible Tubing

20+ULST 115VAC/60Hz 1.45 Amps 46296904

20+ULS 220/60 115VAC/60Hz 1.45 Amps 46296906 Base Model with Overflow Safety Switch

SPECIFICATIONS

PART

NUMBER

DESCRIPTION

Base Model with Overflow Safety Switch and 20’
Flexible Tubing

WARNING: For indoor use only. This pump is not submersible.

FLOW HEAD (ft)

5 1
85 5
70 10
45 15

0 20

Certification: UL & cUL Listed
Weight: 3.25 lbs
Dimensions: 11" X 5" X 4-3/4"
Tank Capacity: 2 qts. Total
Motor Ratings: Ther

Double Insulated
Enclosure

DO NOT DESTROY

THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT

English ...... Page 1

Français..... Page 5

Espanõl ..... Page 8

INSTALLATION

1. Carefully unpack the unit. Check for damage and make sure
all of the required parts are included. The units are thoroughly
tested before packing to insure safe delivery and operation. If
there is any sign of damage due to shipment return it to the
place of purchase for repair or replacement.

2. Choose a mounting location near the air conditioner or
furnace. The pump must be mounted level and the inlet must
be below the lowest drain. The unit has two brackets built into
the deck that can be used to attach the unit to a wall or to the
side of the appliance with installer supplied fasteners.

3. The pump should be mounted so the deck is at least 6 1/2"
above the floor. (See Figure 1) This will allow clearance for
the tank to be removed later for cleaning.

CONNECTING THE PIPING

1. Run flexible tubing or pipe from the condensate drain on the
evaporator pan and/or drain from furnace to one of the inlet
holes on the pump. This drain line should have a continuous
downward slope to allow gravity flow. Cut the end of the line
at an angle so the end does not close off on the bottom of the
pump's tank. (See Figure 2) NOTE: If there is an overflow

drain from the evaporator pan or from the furnace, it may be
necessary to tee the overflow and the main drain together
before they enter the pump. (See Figure 1)

Figure 1

2. Connect a discharge line to the barbed check valve on top of
the pump. This line may be flexible tubing or rigid pipe, but
must be no larger than 3/8" I.D. Extend the discharge line
straight up from the pump to the highest point possible without
exceeding the head/GPH capacity of the pump before directing
the line to the drain. From this high point, run the discharge
line to a drain with a downward slope. For best results, the
drain should be below or approximately level with the bottom
of the pump tank. If it is not possible to slope the line
downward, make an inverted "U" trap at the high point of the
discharge line above the pump. (See Figure 2)

NOTE: Although not needed for this pump, local codes may require
the use of a condensate neutralizer when using this pump with a
condensing gas furnace. Consult local codes for guidelines.

WIRING

Shut off electrical power at the fuse box before making any wiring
connections. All wiring must be done according to local and/or
applicable national codes.

1. Main Power: Unit is provided with a 6 foot long power cord.
Connect this cord to a constant line voltage source, not a fan
or other device that may run intermittently.

2. Safety Switch: If using the model 20+ULS or 20+ULST, the
overflow safety switch may be wired in series with the
appliance's thermostat to shut off the unit in the event that the
pump fails. In the case where heating or cooling requirements are a necessity, the overflow safety switch may be
wired into an alarm circuit. Refer to Figure 3 for wiring. Note: In most cases, use the normally closed (NC) contacts
when used with a furnace or air conditioner and use the normally open (NO) contacts when used to trigger an alarm.

Figure 2

Figure 3

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TESTING

1. With the unit plugged in and the discharge line in place, pour water into the pump reservoir until the unit activates to
verify the unit works.

2. To test the overflow safety circuit (Models 20+ULS and 20+ULST only):
a. Energize the appliance so it runs.
b. Kink the tube coming from the pump discharge, or unplug the power cord, so it cannot pump out.
c. Pour water into the pump reservoir, filling it completely.
d. As the water level nears the top of the unit the overflow safety switch should activate, breaking the thermostat

circuit to the appliance (or triggering an alarm circuit, if used.)

e. Un-kink the tube, or plug the cord back in, and allow the pump to empty the tank. As the water level goes down

the overflow safety switch will deactivate and the appliance will energize again (or the alarm will reset.)

MAINTENANCE

WARNING: Before attempting any maintenance on the unit, disconnect the power cord from the power supply to

reduce the risk of electric shock. Also, take whatever precautions are necessary if the safety overflow switch is
wired to a thermostat or alarm circuit.

SERVICING OF A DOUBLE-INSULATED APPLIANCE

In a double-insulated product, two systems of insulation are provided instead of grounding. No grounding means is
provided on a double-insulated product, nor should a means for grounding be added to the product. Servicing a double­insulated product requires extreme care and knowledge of the system, and should be done only by qualified service
personnel. Replacement parts for a double-insulated product must be identical to the parts they replace. A double­insulated product is marked with the words “DOUBLE INSULATION” OR “DOUBLE INSULATED”

If the unit does not perform as stated in the above tests, remove the two screws holding the cover from the deck, and
remove the cover. Verify that the float mechanism moves up and down freely. If the float binds, it may be dirty or
damaged. Since the motor is totally enclosed, no maintenance is required on the motor. However, the tank and float may
need to be cleaned periodically. Simply remove the four screws at the corners of the pump deck and lower the tank. The
tank can now be cleaned with a mild detergent. Use a damp cloth to wipe off the float if necessary. The impeller may
need to be cleaned as well.

REFER TO THE FOLLOWING IN ORDER TO CLEAN THE IMPELLER

1. Remove the entire pump from the mounting wall.

2. Disassemble the tank from the deck by removing the four screws in the corners of the deck.

3. Turn the unit upside down and remove the impeller cover by loosening the five screws on the underside of the motor.

4. The impeller and shaft assembly may then be removed and cleaned. The impeller chamber should be cleaned at
this time as well.

5. Wipe off the gasket between the impeller cover and the motor housing with a damp cloth before reassembling the
impeller to the motor.

6. Reassemble the tank to the deck and reinstall the pump.

REFER TO THE FOLLOWING TO CLEAN THE CHECK VALVE AND VERIFY ITS OPERATION

1. Remove the discharge line from the check valve.

2. Use a 9/16" wrench to remove the check valve from the deck of the pump.

3. Visually check the valve for obstructions. If damaged, replace.

4. To re-install the check valve, hand tighten it into the deck. Then, tighten 1/2 turn further with a wrench. Be careful
not to over-tighten as this may distort the O-ring seal under the check valve.

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REPLACEMENT ITEMS

The following items are available for replacement. Refer to Figure
4 for guidance in locating and assembling replacement parts.

PART NUMBER DESCRIPTION

46297800 Main Float and Switch Assembly
46297900 Overflow Float and Switch Assembly
46298000 Check Valve*
46298100 Impeller Assembly

*NOTE: The Check Valve includes an O-ring.
TROUBLESHOOTING
IF THE UNIT DOES NOT FUNCTION PROPERLY, REFER TO THE

FOLLOWING

1. Unit does not run:
a. Check the power supply.
b. Check the appliance to see if condensation is actually

being generated.

c. Check to make sure the pump float mechanism moves

freely and clicks the activation switch when moved up
and down.

d. The motor is protected by a thermal overload device,

which may have tripped. This may be verified by
measuring the resistance through the motor coil. An
open circuit reading indicates that the motor has
overloaded, and the unit must be replaced.

e. Check the drain line(s) into the pump for obstructions.

Note: If these lines are clogged and remain clogged, the appliance may eventually be damaged.

Figure 4

2. Pump makes loud noises when running:
a. Check the tank for debris and clean if necessary. The impeller may also be cleaned, if needed. Refer to the

maintenance section above for cleaning instructions.

3. Unit runs but does not pump liquid out:
a. Check the activation float to be sure it is not stuck in the up position.
b. Check the height of the discharge tubing to be sure it does not exceed 20 vertical feet.
c. Check the discharge tube for obstructions and clear if needed.
d. Check the check valve for obstructions. Refer to the maintenance section above for cleaning instructions.

4. Liquid drains back into pump from discharge line:
a. Check valve may have debris in it. Refer to the maintenance section above for cleaning instructions.
b. If the discharge line is plumbed so the highest point is less than 5 feet above the pump, the check valve may

allow liquid to drain out of the line. This is normal and will not damage the pump.

5. Liquid leaks from around the check valve:
a. If the check valve is too tight or too loose it may leak around the O-ring. Check that the valve is hand tight, then

tighten an additional 1/2 turn with a 9/16" wrench.

b. If the O-ring under the check valve is damaged, replace with a 1/2" ID X 11/16" OD X 3/32" width O-ring, or

purchase a replacement check valve, which includes an O-ring.

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