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Change water heater temperature
using a timer |
 | A) Changing water heater temperature with timer requires dual-element water heater/ of any voltage B) To proceed, the lower thermostat on your dual element heater must be changed so it matches upper thrmostat. Why? The lower part of heater will require red reset button or energy cutoff to ensure the overheat safety feature is not bypassed. This will not affect anything if you want to rewire back to normal afterwards ... you can continue with the upper thermostat in the lower part of tank and still get normal operation. Thermostats are interchangeable/ each works with your water heater Rated for 120, 208,
277, 480 volt AC single phase and 3-phase. Temperature range 90-150° Therm-o-disc/ reset trip @ 170°No DC rating, but work with 48 volt DC. Temperature range 110-160° Apcom/ reset trip @ 180° 
Local YMCA hot tub = temperature 105°/... Typical shower-bath
= 110°FBuy: 90-160 degree F for residential tank: Water heater thermostats at Amazon Rheem thermostats More thermostats Rheem UV11698 Rheem SP11698 Camco 08163 Aprom / 110-160° |
 | C) Changing water heater temperature with timer requires additional 10 gauge wire running to lower part of tank/  Two options: 1) You can run conduit down to bottom part of tank as illustrated. 2) Use a fish bit and drill down through foam insulation. Buy: Fish bit |
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T-106R timer changes water heater temperatureUse timer for two different temperatures on electric water heater.
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 T106 timer to switch power between lower and upper parts of tank. Normal operation, the lower thermostat 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. Resources: How to wire thermostats 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. |
| Buy T106R or T176 timer to toggle water temperature | |||
 T106R / outdoor metal box/ 240 Volt 40 amp/ NO NC Buy T106R outdoor at Amazon Resources: T106R manual How to set and operate T100 series timers Sell sheet |
 Larger image Day skipper T176 / indoor metal box/ 240 volt/ 40 amp/ NO NC terminals Buy T176 timer at Amazon Resources: T176R manual |
 Larger image T106P3/ outdoor plastic box/ 240 Volt 40 amp/ NO NC Buy T106P3 beige plastic box T106R metal gray box |
 Larger image T106M/ mechanism Buy T106M at Amazon |
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Change
water heater temperature using GM40 or any DPDT 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 Two water heaters Advantages mixing valve Recirculation system Add another thermostat to gas or electric water heater How electric water heaters work How to wire off Peak water heater |
| Use following timers to toggle water heater temperature | |
 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 GM40  40 amp 120V-208V-240V-277V Dip switches to select voltage 7-day with 15 minute intervals or 24 hour with 1.75 hour intervals Buy Buy GM40 24 hour at Amazon WHQ4 120-208-240-277Volt 24-hour 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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Permanent ON-OFF override |
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 WiOn contactor from Amazon GE z-wave contactor Resource: How to wire WiOn for 120 volt and 240 volt GE z-wave manual |
 GE timers and manuals |
GE 15135 40 amp 120V-208V-240V-277V Dip switches to select voltage 24 hour, 15 minute intervals Buy: Tork TU timer/ same features/ same wiring GE 15135 24-hour/ 40 amp/ outdoor box at Amazon If unavailable Replace with Tork TU timer Option 1: Use Intermatic GM40 / same features and wiring Option 2: Use Open frame relay How to wire open frame relay Option 3: Use mechanical 24-hour timer Mechanical timers Manuals/ Resources: GE 15207 manual How to wire GE indoor 15207 |
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GE 15136 digital 40 amp 120V-208V-240V-277V Dip switches to select voltage 7-day programmable, 9 on 9 off set points, with countdown and random options3 month power outage back-up Buy: Tork DTU 7-day programmable timer/ same features, same wiring GE 15136/ 7 day/ 7 programs /40 amp/ outdoor metal box https://amzn.to/32zjema If unavailable: Option 1: Use DTU 40 / same features and wiring Option 2: Use Open frame relay How to wire open frame relay Option 3: Use mechanical timer Mechanical timers Resources: GE 15132 manual How to wire GE 15136 |
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 Larger image Permanent ON-OFF override |
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 at Amazon Tork P1104FM 240V SPDT with fireman switch at Amazon Buy Tork DTU digital timer at Amazon Manuals/ Resources: Sell Sheet TU wiring manual TU instruction manual |
 Larger image Permanent ON-OFF override |
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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Change
water heater temperature using WIFI 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 Buy DEWENWILS brand wifi Wifi power switch WiOn contactor from Amazon GE z-wave contactor Resources How to wire thermostats How to replace thermostats Two water heaters |
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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 |
