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How to wire GE 15207 timer
See large image See Close-up
|Timer safe for 1
residential water heater.
Remove screws on face to access wiring.
dip switch before
Manual says that incorrect dip-switch setting will damage timer.
Dip switchesStep 2: Dip switches
GE 15207 indoor timer can be used for 120V or 240V water heaters > simply change dip switches to select different voltage.
Water heater voltage is printed on side of water heater. Match dip switches and water heater voltage.
Figure Volts Amps Watts for your water heater
Review basic 240V water heater circuit
Turn off power. Test wires with non-contact tester to make sure power is off.
Never stand on bare ground, always stand on dry boards with working with live electricity.
Do not touch water heater that is wet unless power is OFF.
Set dip switches correctly before applying voltage, otherwise you cannot harm the timer.
Make sure screws are very tight against copper wire.
Use only copper wire.
Do not mix two different gauge wires under same screw terminal.
Do not use solid wire and stranded wire under same screw terminal.
Make sure only copper wire, and no insulation is under screw terminal.
15000 series timers are versatile and can be wired many
Other residential timers wire exactly same way.
Use wire connector
1/2" & 3/4" knockouts
Terminals: TIMER NO NC COM NO2 NC2 COM2
FeaturesStep 4: Wiring features
Four basic features inside 15207
1. Dip switches
2. Screw terminals for clock
3. Screw terminals to contactors
4. Contactors/relays that handle on-off switching to water heater
240 VoltStep 5a:
Wiring diagram for 240V water heater. Both white and black wires are hot.
Power connects to clock, and to COM terminals
Use 10 gauge wire for 240V water heater
GE 15207 timer is housed in plastic box
Ground wire is not connected to box
Ground wire travels continuously from breaker box to water heater.
240 VoltDifferent way to do same wiring shown in image above using NO and COM terminals in reverse.
Why show this variation when manual does not?
SPDT timer with dip switches, and dry NO NC contacts can be wired many different ways.
There is no ez way to show all options.
More ways to wire for 240Volt
Timer is open to experimentation by user.
Set dip switches BEFORE applying voltage to terminals.
Do not spark-test wires across terminals.
Element rated for 4500 watts @ 240Volt, will consume 25% or 1125 watts @ 120Volt
240-120 VoltTimer toggles water heater between 120Volt and 240Volt
Use SPDT timer to change water heater between 120Volt and 240Volt
Use 120Volt at peak-electric price.
Water heater recovers slowly with 120Volt, and uses 1/4 power.
Use 240Volt when electric prices are lower, and faster recovery is needed.
How to change water heater to 120Volts
Off-peak water heater options
9 ways to save with water heater
Install electric meter on water heater
277-480 volt 3-phaseWire GM40 controls 3-phase
480V contactor or 277V contactor
Fused disconnect required on 3-phase and timer wires
How to wire 3-phase timer
See more 3-phase
120 VoltStep 5b:
Wiring diagram for 120V water heater. The black wire is hot, the white wire is neutral.
GE 15207 timer is housed in plastic box.
Ground wire is not connected to box
Ground wire travels continuously from breaker box to water heater..
120 Volt either-or
Timer wired to control under-counter water heater
Avoids having to run additional wire to power 1500 watt under-counter water heater.
Circuit uses same wire that powers dishwasher.
Either dishwasher or water heater can be used, but not both at same time.
Set dip switches for 120Volt
How to install under-counter water heater
|Step 6: How
See GE 15207 manual
Rotate dial to set time of day.
48 segments around dial divide 24-hour day into half-hour periods.
Photo shows all segments down.
> segments up = timer on
> segment down = timer off
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