Overflow Detection Connection; Electrical Connections - Little Giant HT-VLC-P Serie Manual Del Propietário

Overflow Detection Connection

Risk of bodily injury or property damage.
• In applications where property damage and/or personal injury might result from an inoperative or
leaking pump due to power outages, discharge line blockage, or any other reason, a backup sys-
tem(s) (e.g. overflow detection auxiliary switch) and/or alarm should be used and monitored.
• The overflow detection switch should be connected to a Class II Low Voltage circuit. The two
switch wires are yellow. Do not confuse these wires with the line voltage power conductors.
4
IMPORTANT: Routing of wires inside Switch Cover are carefully chosen to ensure no obstructions in the
operation of either switch. Manually operate both floats to verify free movement prior to reinstalling
Switch Cover.
1. Overflow Detection Switch
2. NC terminal. Connect here to shut-off the condensing unit of the heating/cooling system
3. NO terminal. Connect here to activate an external alarm or relay.
4. Switch Cover
5. Thermostat
6. Air Conditioner/Furnace
7. Overflow Detection Switch wiring leads
There are two options for connecting the overflow detection switch:
1. The switch is factory wired to the NC and COM terminals. This will open (break) an electrical circuit
when the switch is activated by an overflow detection level in the reservoir. This can be used to stop
the condensing unit(s) of the heating/cooling system.
• Refer to the thermostat and heating/cooling unit's Operating Manual for expected switch opera-
tion and wiring connections. Connect the switch leads (7) in series with the thermostat circuit as
specified in the manual.
2. The switch can be reconfigured to the NO terminal to close a low voltage circuit in the event of an
overflow detection level, activating an external alarm or relay (purchased separately). Use the fol-
lowing procedure if an NO configuration is required:
• Remove the pump's Switch Cover (4).
• Support the switch and carefully change the lead from the NC terminal to the NO terminal (3).
• Re-install the Switch Cover.
• Connect the switch leads (7) in series with the low voltage external component as specified in
the component's manual.
Place the included "Attention Service Technician" label in a visible location.
1
Y
3
G
5
W
R
2
INSTALLATION

Electrical Connections

Yellow
Y
Green
G
White
W
Red
R
7
6
N694
5