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Risk of damage to pump or other equipment.
•
Before installing pump, allow air conditioner to cycle several times, collecting condensate in a separate container to help flush any
residual oils that may remain in the system. Failure to flush the system can result in damage to the pump and drain line plumbing
components.
•
When operating in a gas furnace environment, care must be taken to ensure acidity of condensate does not fall below the average
pH of 3.4 (to prevent a localized pocket of acid that acts like a battery causing pitting) by routinely cleaning or flushing tank with
fresh water.
•
Support pump and piping when assembling and when installed. Failure to do so may cause piping to break, pump to fail, motor
bearing failures, etc.
•
Do not install the pump in a manner that will subject it to splashing or spraying.
•
Periodically inspect pump and system components. Regularly check hoses for weakness or wear, making certain that all connec-
tions are secure.
•
Schedule and perform routine maintenance as required and in accordance with the Maintenance section of the manual.
•
Pump is for indoor use only.
•
Do not use this pump inside an air plenum.
Physical Installation
1. Install on a strong, level surface with the inlet below the coil drain or mount on wall using the
mounting bracket.
• Do not block the air vents.
• The surface must support the water filled tank.
2. Cut end of pipe(s) from evaporator or furnace drain at a 45° angle.
3. Route pipe(s) into the inlet openings, ensuring no interference with float operation.
4. Install 3/8" diameter tubing into check valve and secure with plastic ty-rap (not provided).
• Route outlet tubing straight up, not exceeding 75% of pump total dynamic head capacity.
5. At the top, slope discharge line down slightly above the drain area. Then, turn down and route to
a suitable drain at a point below or approximately level with the bottom of the pump.
• If it is not possible to slope the discharge line down, make an inverted "U" trap directly above
the pump at the highest point.
Electrical Installation
1. If the model is supplied with a power cord, connect it to its own circuit with a constant source of
power matching the nameplate voltage.
• Connect to a circuit equipped with a ground fault circuit interrupter (GFCI) if required by code.
IMPORTANT: If the power cord is damaged, the whole unit must be replaced.
2. If the model is supplied with a stripped wire cord end, make connections to its own circuit within
a junction box in compliance with the National Electrical Code.
• Wire colors are Green/yellow = Ground; Brown = Line; Blue = Line (230 V) or Neutral (115 V)
• Do not connect to a fan or any device that runs intermittently.
• Make sure the fuses or circuit breaker are of ample capacity.
• Connect the high water level safety switch to class 2 low voltage circuit only.
NOTE: The high water level switch is factory
wired to the NO and COM terminals. Refer to
the VCMA-20-PRO Owner's Manual for more
information or to reconfigure.
For technical assistance, parts, or repair, please contact:
800.701.7894 | littlegiant.com
10000013657 Rev. 000 12/22
High Water Level Switch Wiring
R
W
Thermostat
G
Y
High Water Level Switch
NC
NO
COM
Franklin Electric Co., Inc. | Oklahoma City, OK 73157-2010
Copyright © 2022, Franklin Electric, Co., Inc. All rights reserved.
Red
R
White
W
Green
G
Yellow
Y
AC/Furnace
High Water Level
Switch Wiring Leads
N631
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