How
to control water heater
with 2 switches
See single 15 or 20 Amp
switch
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Do not connect these switches directly to 240V water heater
See inside box with contactor
See step-by-step installation of contactor
Figure volts-amps-watts for your water heater
Single ST01c
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Works for applications up to 100 feet away
Timers are rated 15-amp
Intermatic timers: ST01C & Ei600
Timer wiring
More wiring for ST01C + ST01C programming
3-way switch illustrated on right, reverses operation of timer on left. When red and blue timer wires are connected, they reverse on-off operation of timer.
Timer Black wire must connect to Hot
How to find Hot wire
Timer Blue wire must connect to Load
Timer Red wire is only used in 3-way application
Do not connect these switches directly to 240V water heater
See inside box with contactor
Step-by-step installation of contactor
Figure volts-amps-watts for your water heater
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Here is drawing for 30-amp 3-way circuit
Note: the 240V circuit has 2 hot wires <> putting a switch on 1 hot wire will work
Leviton 3033-2 at Grainger
Check spec sheet for amperage rating of switch
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
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Lowes carries Cooper 3032V
Look for green colored switch
Check spec sheet for amperage rating of switch
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
