Physical Installation; Piping Connections; Electrical Connections - Little Giant VCMA-20 Manuel De L'opérateur

INSTALLATION

Physical Installation

1. Install the pump on a flat, level surface with the inlet
below the coil drain, making sure not to block the air
vents around the motor housing.
• The mounting surface must support the weight of
the pump and the water filled tank.
2. The pump can also be mounted on a wall using the
mounting slots at each end of the tank.
3. Carefully remove the cardboard insert used to prevent
switch movement during shipping.
IMPORTANT: Failure to remove the cardboard insert will cause the pump to overflow.

Piping Connections

1. Cut end of pipe(s) from evaporator
or furnace drain at a 45° angle as
shown to prevent pipe(s) from seal-
ing closed when sitting against the
tank's floor.
2. The pump will accept up to three
drain lines. However, take care to
make sure that total inflow does
not exceed the rated output of the
pump to prevent overflow. Route
drain pipe(s) downward into one or more pump inlet openings one to three inches, ensuring no
interference with float operation. Keep any unused openings closed using the supplied cap plugs.
3. Install outlet tubing or piping onto outlet check valve and secure with hose clamp (not provided).
• Use 3/8" inside diameter maximum tubing or piping to prevent excessive flow back to unit.
4. Route outlet tubing or piping from pump straight up as high as necessary.
• Do not extend higher than 75% of the total dynamic head capacity of the pump.
5. From the high point, slope discharge line down slightly to a point 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 possible. This will produce a siphoning effect which will improve efficiency of the pump.
6. 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 Connections

Connect the power cord to a constant source of power matching the pump nameplate voltage.
• The pump should be connected or wired to its own circuit, with no other electric receptacles or
equipment in the circuit. Do not connect to a fan or any device that runs intermittently.
• The fuses or circuit breaker should be of ample capacity.
• Connect to a circuit equipped with a ground fault circuit interrupter (GFCI) if required by code.
Some models are supplied with a stripped wire cord end. Power connections must be made within a
junction box, and must comply with the National Electrical Code. Wires are color coded as follows:
• Green/yellow = Ground; Brown = Line; Blue = Line (230 V) or Neutral (115 V)
IMPORTANT: If the power cord is damaged, the whole unit must be replaced.
INSTALLATION
Physical Installation
5