Keep wires and conduit straight
GM40 series timer
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Keep wires and conduit straight |
How
to wire DPDT timers GM40 series timer Search Search using google with ads |
 Larger image Permanent ON-OFF override |
 GM40AV
40 amp 120V-208V-240V-277V Automatically detects voltage 24 hour, 15 minute intervals Power outage backup option Buy: GM40AV 120-208-240-277V at Amazon GM40AVQ w/ back-up battery at Amazon Manuals/ Resource: GM40AV Manual GM40AV sell sheet GM40 instruction manual Sell sheet with model numbers How to set analog timers Intermatic timers and manuals |
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GM40AVE digital 40 amp 120V-208V-240V-277V Automatically detects voltage 7-day programmable, 20 on 20 off set points Power outage backup Buy: GM40AVE 120-208-240-277Volt GM40AVE at Intermatic Manuals/Resources: GM40AVE manual GM40AVE sell sheet FM1D 20 setpoint programming FM2D 50 setpoint programming Intermatic timers and manuals |
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Woods Wifi 30 amp Woods 50054 WiFi contactor Auto detect voltage/ 120, 208, 240, 277 volt WiOn contactor connects to app on phone How to wire wifi Buy DEWENWILS brand wifi Wifi power switch GE z-wave contactor Resource: How to wire WiOn for 120 volt and 240 volt GE z-wave manual |
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Tork
TU series 40 amp 120V-208V-240V-277V Automatically detects voltage 24 hour 15 minute intervals Buy: Tork TU series DPDT/ 120-277V universal timer Buy Tork DTU digital timer at Amazon Manuals/ Resources: Sell Sheet TU wiring manual TU instruction manual |
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Tork
DTU
digital
40 amp 120V-208V-240V-277V Automatically detects voltage Replaces the old Intermatic GM40E 7-day programmable, 7 on 7 off set points, with random option. Power outage back-up Buy: DTU40 At Amazon Manuals/ resources DTU40 instruction manual |
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24 hour mechanical timers Long lasting Skip-a-day option Repairable with widely available parts Resources: Intermatic 24 hour timers Tork box timers Compare all box timers |
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240
Volt and 208 volt Wire GM40 for 240Volt water heater Basic 240Volt wiring Turns OFF both hot wires going to load Resource More ways to wire for 240Volt Figure volts amps watts for water heater Wire size charts  |
 Toggle between water heater and car charger Larger image This can be accomplished with simple 3-way 30 amp switch: .... your 240 volt line has 2 hot wires.... take one hot wire and run it to both the charge station and the water heater ... connect the second hot wire to the common or different-colored screw on the 3 way switch. Second wire to water heater connects to one of the other screws, and second wire to charge station connects to remaining screw. Buy: Tork TU series DPDT/ 120-277V universal timer Buy Tork DTU digital timer at Amazon 30 amp 3 way switch Buy: Eaton Pass & Seymour Car charger L-blade Adapter: 3 prong dryer plug to electric car |
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240 volt and 208 volt GM40 controls two 4500 watt 240Volt water heaters Turns off 1 hot wire to each water heater Use 50 amp breaker and 6 gauge wire to timer. 10 gauge ire to each water heater Timer not rated for controlling two 5500 watt water heaters Resource How water heaters work How to wire water heaters Figure volts amps watts for water heater Two water heaters Wire sizes |
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240 volt and 208 volt GM40 controls two 4500 watt 240Volt water heaters using dry terminals Set dip switches for 240Volt Timer can control two different voltages, and two separate circuits. Both circuits turn ON-OFF at same time. Control any voltage with dry terminals that are separate from clock terminals Two separate wires from breaker box. Turns off 1 hot wire to each water heater Use two 30 amp breakers and 10 gauge wires when wiring two 240Volt water heaters with element wattage over 3800 watts. |
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240 volt and 208 volt GM40 controls two 240Volt water heaters One or other water heater is ON. Both heaters not ON at same time Use 10 gauge wire  Resource Two water heaters |
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120-208-240 volt 3-phase Example: High leg delta GM40 3-phase timer 120 or 208 or 240Volt 3-phase line and timer must have fused disconnect Resources What is high leg delta See more 3-phase What is 3-phase |
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Toggle between 30 amp Loads Sometimes there are not enough circuit breakers for new 240 volt 3 HP irrigation motor. Use timer to toggle between 240 volt loads, and set timer to schedule irrigation pump. When pump is off, the water heater receives power. 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 when pump is Off. Same can be accomplished using 30 amp 3-way switch Buy: DEWENWILS brand wifi Wifi power switch Leviton 3033-2 3-way switch at Amazon Leviton 3-way 30 amp switch Resource How to wire 240Volt outlets Motor resources Not enough circuit breakers |
 Always check pump voltage and wiring diagram located on nameplate Pump operates continuously. Install another timer on L2 Hot line to turn pump ON-OFF |
240
volt or 208 volt 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: buy T106 timer T1906 timer |
 Larger image Change water heater temperature using GM40 timer Applies to all DPDT timers shown at top of this page Also applies to SPDT Intermatic T106 timer
This plan allows normal 120°F temperature for saving energy, and then increase temperature to 130-140°F for sterilized wash day or certain times of day. The same can also be accomplished with DPDT 40 amp switch or relay. 140°F is extremely dangerous. Typical bath shower is 110°F and Hot tub 105°F Operation plan has two states: Either upper thermostat and element have power -or- lower thermostat and element have power. But not both at same time. 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 resulting in very hot water at top of tank, but not whole tank. Disadvantage: If the upper part of tank is heating, then lower part of tank is off, so lower part of tank will cool rapidly as new cold water enters tank, therefore this technique is good for making short-term batches of very hot water. Work required: Install ECO-protected thermostat for lower thermostat. This ensures both upper and lower parts of tank are ECO-protected from overheating. Rewire tank so upper and lower parts are separate. Add 2 extra wires. Use GM40 timer to toggle power between lower and upper parts of tank. Other options include: 2 water heaters, mixing valve, recirculation system Resourcese How to wire thermostats How to replace thermostats How to wire off Peak water heater |
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277
volt Timers with automatic voltage detection do not have dip switches, and will detect 277 volt. GM 40: Set dip switches for 277Volt. Dip switches must be set before power is applied to timer Wiring is identical to 120Volt, with Hot and Neutral. 277 volt is a derative of some commercial 3-phase 440 volt services, and does not apply to residential 120-240 volt services. Resource How to wire 3-phase timer What is 277 volt |
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277 volt Wire GM40 for two 277Volt loads Both loads turn ON-OFF at same time Do not exceed timer 40 amp rating Volts x Amps = Watts. Each electrical device has rating plate Resource Wire and breaker size charts |
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277 volt 3-phase Wire GM40 controls 3-phase Use 277V Or 480V contactor Fused fused safety switch, or disconnect, is required on 3-phase line and timer in typical installation. Resource How to wire 3-phase timer See more 3-phase How to wire fused safety switch |
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120 volt Wire GM 40 for 120Volt water heater Set dip switches for 120Volt. Dip switches must be set before power is applied to timer  |
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120 volt 2 loads Both loads turn ON-OFF at same time Do not exceed timer 40 amp rating Volts x Amps = Watts. Each electrical device has rating plate |
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120
volt 3-phase
Use GM40 to control 3-phase circuit Most buildings with 3-phase also have 120Volt outlets. Use 120volt to power timer. Wire timer as shown in illustration directly above. Timer opens-closes circuit to 3-pole contactor with 120Volt coil. Resource See more 3-phase |
 GM 40 timer is NOT rated for DC voltage, but can switch 24 DC volt line Wire GM40 timer to control DC motor: Use same diagram to control any single-phase voltage. Buy: Omron-DC-Power-Relay Resource: DC relays Do not mix different gauge wires under same screws. Smaller wire comes loose, causing sparking and high heat and fire. Do not mix solid wire and stranded wire under same screw. |
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Toggle
between 120 volt or 240 Volt Off Peak Wire GM40 timer to toggle water heater between 120Volt and 240Volt. Wiring inside water heater is not changed Elements and thermostats will work with 120 or 240 This will not work for Whirlpool energy smart water heater, electronic water heaters, heat pumps, tankless, etc Use this technique for peak electric prices. When prices are peak, set water heater to operate at 120 volts for slower heating. Tank stays hot, but hot water does not recover quickly. Element rated for 4500 watts @ 240Volt, will consume 25% or 1125 watts @ 120Volt and heat water 1/4th as fast as 240 volt. When peak price ends, resume 240Volt operation for faster heat recovery inside tank. Resource Off-peak water heater options |
 Turn Load ON once every 10 minutes for 8 hours per day Set 120Volt cycle timer for chosen time duration. For example once per each 10 minutes. Or once each 5 seconds. The cycle timer dial rotates continually, and turns load ON-OFF for each cycle. To operate the cycle timer at different hours, install GM40 timer. GM40 timer can be installed on the Hot line before or after the cycle timer. Resource Read more CT2000 cycle timer |
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Control
2 water heaters using 2 EH40 timers Each water heater can have different 7-day schedule 10 gauge wire and 30 amp breaker run cooler. 30 amp circuit breaker and 10 gauge wire for water heater runs cooler with less energy loss. Breaker box lasts longer. Different wiring: For two 4500 watt water heaters, you can use one 40 amp breaker and 8 gauge wire to bring power from breaker box to the first timer. For two 5500 watt water heaters, you can use 50 amp breaker and 6 gauge wire Resource Water heater timers EH40 water heater timer Things you can do to increase amount of hot water 9 ways to save with water heater |
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When black-and-white wires
are used for 240Volt, add
black tape to
white wire. This practice will notify any electrician that white wire carries power. |
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Fire safety/ Do not use stranded
wire under screw plate Stranded wire can come loose under screw plate, causing connection to heat up, and become fire hazard over time. Keep enclosure door closed. Attach stranded wire and solid wire with wire connector, and run solid copper jumper wire to screw terminal |
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No insulation under screw plate Use only solid copper wire Do not put insulation under screw terminal Take photo of wires before starting |
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Maximum 2 solid copper wires
under screw plate Max 2 wires under screw plate Each wire must be same gauge Attach multiple wires with wire connector, and run jumper to screw terminal Resources: Wire and breaker size charts |
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