Keep wires and conduit straight
How to wire GE 15087 timer
Search waterheatertimer.org /
all results
Search using 
|
Keep wires and conduit straight |
How to wire GE 15087 timerSearch waterheatertimer.org /
all results
Search using
|
 Buy 24 hour: GE 15135 24-hour/ 40 amp/ outdoor box Resources 15207 Manual Quick-start guide to wiring More GE timers and manuals |
 Buy 24 hour: Woods 59402 timer Resources 59401 and 59402 manual 59402 sell sheet More Woods timers |
 GM40 series 7-day and 24 hour Resources GM 40 series timers with same wiring Compare all box timers |
 Buy 24 hour or 7-day: GE 15136/ 7 day/ 7 programs /40 amp/ outdoor metal box Resources GE 15132 manual How to wire GE 15136 More GE timers and manuals |
 Larger image Tork Permanent ON-OFF override Buy 24 hour/ or 7-day Tork DTU40 At Amazon Resources: DTU40 instruction manual Sell sheet with model numbers |
 Resources: Intermatic 24 hour timers Tork box timers Compare all box timers |
 |
 Never
assume power is OFFUse non-contact voltage tester on timer, on wire, on outlet to see if power is present.  Press
button on tester, if single beep then no power is present. If
continuous beep then power is present.Never stand on bare ground, always stand on dry boards, do not hold or touch anything metal when working on timer or water heater that has power, tape tester leads to wood sticks, never touch wet water heater, or appliance, or device that was flooded, or outdoor enclosure, or timer, that had a short or fire without turning power OFF. Buy: Multimeters at Amazon Buy non-contact voltage tester at Amazon Electric testers at Amazon |
 |
 See large image Timer safe for 1 residential water heater. |
15207 (15087) Nema1 indoor 15135 Nema3R indoor-outdoor Buy: GE 15135 24-hour/ 40 amp/ outdoor metal box at Amazon Resources: GE-15087-15207-56922-Manual Quick-start guide to wiring Max 24 on-off periods per day Step 1: Remove screws on face to access wiring.  |
| ✔
Set
dip switch before
connecting power. Manual says that incorrect dip-switch setting will damage timer. |
 |
Step
2: Dip switches GE 15087 timer can be used for 120V or 240V water heaters > change dip switches and select voltage. Water heater voltage is on label of each device. Match dip switches to voltage. Resources: Figure Volts Amps Watts Basic 240V water heater circuit |
Use cable connector 1/2" & 3/4" knockouts |
 Terminals:
TIMER
NO NC COM NO2 NC2
COM2
|
Step
4: Wiring
features Four basic features inside 15087 1. Dip switches 2. Screw terminals for clock 3. Screw terminals to contactors 4. Contactors/relays that handle on-off switching to water heater  |
 |
 Larger image More ways to wire for 240Volt |
240 VoltWiring 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 15087 timer is housed in plastic box Ground wire is not connected to box Ground wire travels continuously from breaker box to water heater.  When using black-and-white wires for 240Volt, add tape to white wire. This action will tell next electrician that white wire carries power |
 Larger image More ways to wire for 240Volt |
240 VoltDifferent way to do same wiring shown in first 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. Resource: More ways to wire for 240Volt 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 |
Timer
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. Resources: 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 |
|
 Larger image Buy: Dishwashers at Amazon |
120-240Volts Use Timer to toggle between appliances 240Volt circuit can be cut off by turning off one hot wire. Put water heater on NC normally open terminal, so water heater is ON all the time, except when timer turns ON, and then circuit to dryer is activated. Resources: Same wiring applies to many timers including Intermatic GM40 & WHQ, Tork DTU40 Other timers can perform same operation such as Intermatic T1905 & T1975 How to wire 240Volt outlets |
 Always check pump voltage and wiring diagram located on nameplate |
120-240Volts GE 15000 series timers control 2-speed pump Low speed is connected to NC terminal, and then pump operates continuously in low speed until timer turns ON. When timer turns ON, High speed turns ON. Diagram applies for both 120V and 240V 2-speed pool pumps. Other timers can be used for 2-speed pool pump: Resources: Tork DTU40, GM40 timer, T106 timer, T1906 timer Pump operates continuously. Install another timer on L2 Hot line to turn pump ON-OFF |
 Larger image |
Change
water heater temperature using GE 15207 timer Same wiring applies to GE 15087- 15132 etc series timers Applies to Tork DTU timer and Intermatic GM40 timer and Intermatic WHQ series 120-240Volts Use timer for two different temperatures on electric water heater. Either upper thermostat and element have power or lower themostat and element have power. But not both at same time. Install ECO-protected thermostat for lower thermostat. Both upper and lower parts of tank are ECO-protected from overheating Rewire tank so upper and lower parts are separate. Use GM40 timer to switch power between lower and upper parts of tank. Normal operation, the lower thermost and element receive power and keep tank at temperature set point. Upper thermostat and element have no power. This is called 'redundant' water heater operation. This technique for heating tank more rapidly after cold water first enters tank. When timer activates, power to lower part of tank turns OFF. Power to upper part of tank begins. Upper thermostat is set for higher temperature. Since tank is at regular temperature, the higher setting means upper element will turn ON and begin heating tank to higher set point. Use this technique to heat water very hot for laundry cycle. Disadvantage: The lower part of tank will cool rapidly as new cold water enters tank, so this technique is good for making short-term batches of hot water. How to wire thermostats How electric water heaters work |
 |
 |
120 VoltWiring diagram for 120V water heater. The black wire is hot, the white wire is neutral. GE 15087 timer is housed in plastic box Ground wire is not connected to box Ground wire travels continuously from breaker box to water heater. |
 |
120 VoltTimer 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 Resource: How to install under-counter water heater |
 Larger image |
120-208-240
volt 3-phase
Example: High leg delta Tork DTU 3-phase timer 120 or 208 or 240Volt See more 3-phase What is high leg delta 
|
 |
 Larger image |
277-480 volt 3-phaseWire GM40 controls 3-phaseUse 277V 480V contactor or 277V contactor Fused disconnect required on 3-phase and timer wires  How to wire 3-phase timer What is 277 volt See more 3-phase |
 Solid copper wire only |
 Larger image Both wires MUST be same gauge Straighten each wire Tighten screw very tight against copper wire |
 Larger image Connect stranded and solid with wire connector and run jumper to screw plate. See example image |
Use wire connector |
 Use push-on wire connectors |
3
wires/ or different gauge wires Join wires with wire connector or push-on connector Run jumper to screw terminal. Buy: Push on wire connectors Red 3P connector (shown) for 10-14 gauge wire Resource: How to select and install wire connector |
  12 Ga |
10 gauge or 12 gauge? 10 gauge is larger/ for 30 amp breaker. 12 gauge is smaller/ for 20 amp breaker 10 gauge wire can have black-white or black-red 12 gauge will have black and white wires Buy short pieces 10 and 12 gauge wire at local box store Compare with your wire. Match color code and amp rating for wire |
|
|
With
120 and 277 Volt
circuits, white wire is always Neutral, and black is Hot Hot wire is always switched on-off. Neutral wire remains connected without switching. With 208 and 240 circuits, both wires are Hot, and both wires carry voltage. Either Hot wire can be switched on-off. Or both Hot wires can be switched on-off. Add black tape when white wire carries voltage (applies to 208 and 240V circuits) |
|
 CA3750 has 5 knock-outs 1 on back, 1 on each side and 2 on bottom Keep enclosure door closed Fire safety Always keep enclosure (box) cover closed |
 |
Use
Wire connectors, or conduit clamps to secure wire to enclosure By code, all wire must be securely attached to enclosure to prevent wire pull-out. Wires or conduit must be secured to structure, so there are no loose wires. Wires inside the enclosure cannot lay over top of connection terminals. Join all ground wires together and cover with wire connector. Push ground wires down and away from connection terminals. 2T2500GA plastic outdoor enclosure has 5 knock outs for 1/2" and 3/4" Wire connectors 1 on back, 1 on each side and 2 on bottom More Intermatic enclosures |
 Contactors/ relays |
|
|
 | Buy
from my affiliate links every time/ thanks: Amazon As an Amazon Associate I earn from qualifying purchases Enter Amazon from any link on my site, fill cart with any item ... purchases pay small commission E-mail: geno03245w@gmail.com My response might end up in spam folder, check email folders Waterheatertimer on Twitter Message thru facebook |
