Little Giant VCMA Series User Manual

Little Giant VCMA Series

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littlegiant.com

VCMA SERIES

Owner’s Manual

Condensate Removal Pump

Table of Contents

Questions and Answers:

A
Ashley SimsAug 18, 2025
What to do if condensate is overflowing from the Little Giant VCMA tank?
- E
  Emily DanielAug 18, 2025
  If condensate is overflowing from the tank, several issues could be the cause. First, ensure the pump is connected to a dedicated GFCI circuit. A larger pump may be required if the liquid inflow matches or exceeds the pump output capacity. Also, the high level switch should shut off the A/C unit or signal an alarm if connected correctly. Make sure the pump is level; otherwise, it may not activate. Clean the float, as debris accumulation can make it too heavy. Inspect the check valve for proper operation and clear any blockages in the impeller housing. Check the outlet tubing for kinks or blockages, and clean the inlet and outlet piping. If the impeller is not turning, clear any blockage in the impeller housing. Finally, the switch or motor may be defective, requiring pump replacement.
E
Emily CollinsAug 20, 2025
Why Little Giant VCMA Water Pump does not start when the tank is full of condensate water?
- M
  Melissa HernandezAug 20, 2025
  If your Little Giant Water Pump isn't starting when the tank is full, there are several potential causes. First, ensure the pump is connected to a dedicated GFCI circuit. Check the circuit breaker or fuse and replace it if necessary. An accumulation of debris on the float may also prevent it from operating correctly, so clean the float. Also, check for any obstructions to the float movement and remove them. Finally, the switch or motor may be defective, requiring pump replacement.
R
Regina PopeAug 23, 2025
What to do if Little Giant VCMA Water Pump runs but does not discharge liquid?
- M
  Marcus JuarezAug 23, 2025
  If your Little Giant Water Pump runs but doesn't discharge liquid, start by removing the check valve and inspecting it for proper operation. Verify that the lift isn't too high for the pump's rated performance. Check if the inlet to the impeller is plugged and clean it if necessary. Also, inspect the outlet tubing for any kinks or blockages, clearing any slime and debris from the tubing and cleaning the inlet and outlet piping.
A
Andre FoxAug 26, 2025
Why does Little Giant VCMA Water Pump will not shut off?
- A
  Adam RobertsAug 26, 2025
  If your Little Giant Water Pump won't shut off, check for obstructions to the float movement and remove any debris. A larger pump may be required if the liquid inflow matches or exceeds the pump output capacity. The high level switch should shut off the A/C unit or signal an alarm if connected correctly. Also, the switch may be defective, requiring pump replacement.
N
Nicole WilliamsAug 27, 2025
What to do if condensate is overflowing from the tank of my Little Giant VCMA?
- D
  Dwayne JohnsonAug 28, 2025
  If the condensate is overflowing from the tank of your Little Giant Water Pump, several factors could be responsible. First, ensure the pump is connected to a dedicated GFCI circuit. The liquid inflow may exceed the pump's output capacity, requiring a larger pump. In this case, the high-level switch should shut off the A/C unit or signal an alarm if correctly connected. Make sure the pump is level; otherwise, it may not activate. Clean the float to ensure it is not too heavy to operate correctly. Inspect the check valve for proper operation. Ensure the outlet tubing is free from kinks or blockages, and clear any blockages in the impeller housing. Replacing the pump may be necessary if the switch or motor is defective.
E
Ellen HaysAug 30, 2025
Why does my Little Giant VCMA Water Pump not start when the tank is full?
- J
  john40Aug 30, 2025
  If your Little Giant Water Pump does not start when the tank is full of condensate water, there are several potential causes. First, ensure the pump is properly connected to a dedicated GFCI circuit. Check the circuit breaker or fuse and replace it if necessary. Clean the float to remove any debris that may be causing it to be too heavy to operate correctly. Inspect the float movement path and remove any obstructions. If these steps do not resolve the issue, the switch or motor may be defective, requiring pump replacement.
J
jamesmyersSep 2, 2025
What to do if my Little Giant Water Pump runs but does not discharge liquid?
- K
  Kristen SanchezSep 2, 2025
  If your Little Giant Water Pump runs but does not discharge liquid, the check valve may be stuck or plugged and should be inspected after removal. The lift may be too high for the pump; check the rated pump performance. The inlet to the impeller could be plugged, requiring you to pull and clean the pump. Also, the outlet flow might be obstructed, so check the outlet tubing for kinks or blockages and clear any slime or debris. Clean the inlet and outlet piping.
K
krobinsonSep 4, 2025
Why will my Little Giant Water Pump not shut off?
- M
  Michaela MaysSep 4, 2025
  If your Little Giant Water Pump will not shut off, there might be an obstruction in the float movement path; remove the tank and clear any debris. The liquid inflow might exceed the pump's capacity, requiring a larger pump. The high-level switch should shut off the A/C unit or signal an alarm if connected correctly. If not, the switch could be defective, requiring pump replacement.
K
Kyle JohnsonSep 6, 2025
How to troubleshoot a Little Giant Water Pump that does not deliver rated capacity?
- N
  Nicole LopezSep 7, 2025
  If your Little Giant Water Pump does not deliver its rated capacity, start by removing and inspecting the check valve for any obstructions. Verify that the pump's lift isn't too high by checking its rated performance. Ensure the supply voltage matches the nameplate rating, as low voltage can slow the speed. Inspect the impeller and discharge pipe for clogs, and clean the pump and check the pipe for scale or corrosion.
A
Amy JonesSep 9, 2025
Why Little Giant Water Pump does not deliver rated capacity?
- R
  rodriguezmichelleSep 9, 2025
  If your Little Giant Water Pump isn't delivering its rated capacity, start by removing the check valve and inspecting it for proper operation. Verify that the lift isn't too high for the pump. Check that the supply voltage matches the nameplate rating. Finally, the impeller or discharge pipe may be clogged, so pull the pump and clean it, checking the pipe for scale or corrosion.

Little Giant VCMA Series Specifications

General

Horsepower	1/30 HP
Type	Condensate Pump
Voltage	115V
Discharge Size	3/8 in. O.D.
Model	VCMA-20ULS
Power Cord Length	6 ft
Switch Type	Float Switch

Summary

SAFETY INSTRUCTIONS

Hazard Message Definitions

Explains DANGER, WARNING, CAUTION, NOTICE, IMPORTANT, and hazard symbols.

General Safety Precautions

Guidance for qualified personnel, potential hazards, and general warnings before starting.

Specific Safety Warnings

Details high voltage, electrical shock, bodily injury, equipment damage, and operational risks.

PRODUCT DESCRIPTION

Specifications

Provides technical specifications including model, voltage, HZ, Amps, Watts, and weight.

Flow Rates

Details the pump's performance based on head pressure (GPH/LPH).

INSTALLATION

Physical Installation

Instructions for unpacking, mounting location, and preparing the pump for installation.

Piping Connections

Guides on cutting and connecting inlet and outlet tubing for proper water flow.

Electrical Connections

Details on wiring, grounding, and connecting to power supply to prevent shock.

Wiring Guidelines

Recommendations for voltage, GFCI circuits, and dedicated circuits.

Line Voltage Connections

How to connect the pump's power cord to the power supply.

High Water Level Switch Connection

Instructions for wiring the auxiliary high-water level switch to a low-voltage circuit.

High Level Switch Options

Explains two methods for configuring the high-level switch for different functions.

Operation Testing

Step-by-step guide to test the pump's float switches and overall operation.

MAINTENANCE

Periodic Maintenance

Routine inspection and cleaning procedures for the pump and system every six months.

Troubleshooting

Pump Troubleshooting

Common problems, their probable causes, and corrective actions for pump issues.

LIMITED WARRANTY

Applicable Warranty Period

Specifies the warranty duration from the date of purchase or manufacture.

Instructions Applicable to this Limited Warranty

Details the process for submitting a warranty claim and company's responsibilities.

Limitations Applicable to this Limited Warranty

Lists exclusions and conditions under which the warranty is void.

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