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Thermostat timer
air conditioner timer
reduce run time of air conditioner during peak electric
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Override
air conditioner thermostat using programmable timer
Thermostat timer air conditioner timer reduce run time of air conditioner during peak electric |
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Twin timerTwin timer lets you run air conditioner for short duration each hour. The repeat cycle timer lets you keep home or building temperature moderated, and use less electricity during peak electric prices.. PV shows the time left in the count up for Mode B... so there is .78 seconds left before it switches to Mode A SV shows 2.99 ... which is the set time I choose for Mode B When 2.99 seconds ends, Mode A set time will display. Image shows the Inkbird twin timer. Use this timer to limit air conditioner run time  Buy:Twin timers at Amazon 24 volt twin timer Omron twin timers Sestos relay timer Migro assorted timer Resource: Twin timer manual Omron twin timer manual |
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Buy Omron LY2 LY3 relay LY2 8-pin relays LY3 11-pin relays for 3 contestants LY4 14 pin relays for 4 contestants |
 Reduce run-time of air
conditioner.Problem: air conditioner runs too much during peak electric prices. Programmable thermostat for the air conditioner can control peak usage by raising temperature and reducing hours of operation during peak times, but it cannot be programmed to limit actual number of run-time minutes per hour. This diagram solves problem without compromising integrity of AC motor or equipment. The din rail timer is programmed so timer is ON during peak hours. Any programmable timer will do the job but din rail timers are available in both 120 and 240 volt models. And 12-24 volt also. When the din rail timer is ON, it turns ON a relay, and turns ON a twin timer. When the din rail timer is OFF, the relay is OFF and the twin timer is OFF. One of the 24 volt wires from thermostat is connected to the com terminal on one side of relay. When the din rail timer is OFF, the relay is OFF, and the 24 volt thermostat circuit is routed straight to the contactor for normal operation of air conditioner. When the din rail timer is ON, the relay is ON, and it switches the 24 volt thermostat wire away from contactor and to the Twin timer. The twin timer is rated for either 120 or 240 volt. Twin timer is designed to turn on-off-on-off-on-off in endless repeat cycle. ON times and OFF times are set independently, and can be any value between .01 second and 99.99 hours. For example, the twin timer ON time can be set for 40 minutes. And OFF time set for 20 minutes. This limits the operation of air conditioner to 40 minutes. During the 40 minute period, the twin time routes 24 volts to the air conditioner contactor for normal operation. After 40 minutes, the twin timer cycles OFF, and then air conditioner cannot turn on for 20 minutes until the twin timer cycles back ON again. When the 20 minutes expires, the twin timer again lets the 24 volts complete circuit to contactor for 40 minutes. The cycle of 40 ON and 20 OFF continues as long as din rail timer is ON. Set the din rail timer to turn ON during peak electric prices. Illustration on right shows same diagram except pulling power off the 240 volt AC circuit. Use 10-15 amp inline fuse to protect timer and relay circuit from 50-60  amp
air conditioner circuit. Use terminals to connect the smaller wires to
contactor. Prevent loose connection and risk of fire: Do not put two
different gauge wires under the screw plate on contactor. Never put
stranded wire under screw plate.Buy: 120-240 volt THC15 din rail timer 120 volt LY2 relay 240 volt relay 120-240 volt Twin timer HVAC contactors Inline fuse holders Din rail fuse holder Resources: How to wire twin timer Din rail timers and manuals Relays and contactors |
 Steve
says:I've been able to make the DH48S-S (twin timer) work pretty well for my need of limiting the run time of air conditioning compressor. My twin timer has a 24VAC coil so it I can hook it directly to the thermostat wires. Here's how I wired it up: Yellow (compressor) wire from tstat connected to terminal 7 (the 24vac coil) Tstat common wire to terminal 2 (the 24vac coil) Jumper from terminal 7 to terminal 8 (continue yellow wire to relay common) Yellow wire going to air conditioner contactor connects to terminal 5 on twin timer (relay normally closed contact) Set the time1 to 5 minutes (the "disallowed" off time") Set the time2 to 10 minutes (the "allowed but limited to x minutes" on time) So when the thermostat calls for cooling, putting 24 volt power on the yellow wire, it powers the timer and powers the relay, causing air conditioner to run for up to 10 minutes. If the thermostat stops calling before 10 minutes, the twin timer is unpowered and when it calls again, it starts in the "allowed but limited" t2 at 00 minutes, and allows it to go to 10 minutes. Beautiful! I also have a second timer that is set to the peak hours of 3 to 8 pm and it bypasses the twin timer during those times. Footnote about fuse: The illustration shown above has the timer ON during regular prices, and OFF during peak pricing. If the fuse blows out, the timer will remain OFF. This means the twin timer will be in control of the AC cycle at all times, until a repair is made. If the wiring is changed, so timer is OFF during regular price, and ON during peak, then if fuse blows, the AC will run normally even during peak pricing. To make this change in wiring, simply switch wires on terminals 3 and 5. Use a 10 amp fuse to protect timer circuit. A fuse will protect the entire length of wire and the timers. The fuses rarely if ever blow out or have a problem.  Buy Uxcell DH48S-S twin timer 24 volt twin timer 24 volt din rail timer Panel mount fuse holders at Amazon Fuse blocks at Amazon Resource: DH48S twin timer manual 24 volt timers |
 Larger imageToggle between two heat pumps Strategy so both heat pumps are not operating same time. Saves wear and tear on main breaker, reduces overall electric consumption, might save having to upgrade service panel. Main breaker stress test Outdoor compressor has to turn on before unit will heat or cool. The outdoor unit is activated when 24 volt thermostat wires send 24 V AC to a contactor located on each outdoor unit. The contactor receives 240 volt power at all times ... and will be HOT ... unless breaker is OFF. The thermostat does not turn power off to the contactor ... only the circuit breaker can turn off 240 volt power. Open the access panel on side of heat pump unit and see the contactor ... it will have a start capacitor connected to one leg of the hot wires going to the compressor motor. The thermostat wires connect to sides of contactor, and activate the 24 volt coil that turns contactor ON-OFF ... which turns heat pump unit ON-OFF. Select one of the 2 thermostat wires, and wire circuit as shown in illustration. You need 120 volt line with Hot and Neutral, the ink bird twin timer, an LY2 relay, length of thermostat wire, twist on wire connectors, and ordinary 15 amp 3-way switch. Sheathed thermostat wire is rated for outdoor use, and is sun resistant, unsheathed bell wire is not rated for outdoor.  All
connections must be made inside electrically-rated enclosure. The
relay will work in any temperature, while twin timer would be
susceptible to temperature extremes.General operation: When 3 way switch is in one position, then the two heat pumps cannot turn ON at same time. Instead their schedule is controlled by how many hours you set on twin timer. For example set timer for 1 hour and during that period, heat pump1 can turn on any time thermostat calls for heat-cool .... then after that hour, heat pump2 is free to turn ON for 1 hour (or whatever time you set). Basically, you are just turning off the thermostat to each unit. Back and forth, endless cycling between heat pumps until 3-way switch is moved to other position ... after which, ordinary operation is restored and both heat pumps can turn ON at same time whenever thermostats call for heat-cool. |
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Basic
contactor wiring: Pull out the disconnect so electricity is OFF. Open wiring compartment on air conditioner. Use terminals to connect the smaller wires to line side of contactor. A capacitor will be connected to Load side of contactor. Use 10-15 amp inline fuse on one of the two wires to protect timer and relay circuit from 50-60 amp air conditioner circuit. The fuse will protect entire length of circuit. Prevent loose connection and risk of fire: Do not put two different gauge wires under the screw plate on contactor. Never put stranded wire under screw plate. Buy: HVAC contactors Inline fuse holders Din rail fuse holder Resources: Relays and contactors |
 Larger image Intermatic enclosure 9-3 ⁄8" x 5-1 ⁄2" x 3-5 ⁄8" |
Nema 3R outdoor Enclosure: Nema3R Enclosures can be used for outside installation: Image on left shows din rail timer, din rail fuseholder, and 3 relays mounted on the rail. Twin timer not shown. Estimated height of twin timer on the rail is 4-1/2" tall. The box on left: twin timer is too tall and would be attached to side of enclosure. Off-delay timers will fit in 3-5/8" space if mounted directly to metal box, and not din rail.  The
control box circuit shown on left is used for outdoor lighting. Twin
timer and base are not shown. Buy: 2T511GA Intermatic Nema3R enclosures Hoffman 8 x 6 x 4 Nema 3R Hoffman 6x6x6 Bud industries 11x7x5 box without knockouts Din rail Resource: Compare enclosures |
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Siemens Single-phase
Voltage monitor Rated 24-240 volt AC Why use voltage monitor? The problems of low voltage and phase fluctuation (lower voltage on one wire) do not affect resistance loads like light bubs or electric water heater, except to make them burn at dimmer capacity. However low voltage and phase fluctuations do affect inductive loads like contactors, relays, motors, pumps, HVAC causing problems such as chatter on contactors and relays, and lower rotation speed on motor, causing higher temperatures, and burning out the motor or shortening motor lifespan. Buy: Single phase monitor Resource: How to wire phase monitors |
 Override thermostat?Add more programs to control furnace? Use ST01 without any voltage, or with any voltage I cannot say exactly which HVAC or thermostat wires you connect this to ../ for example the AC control board sends 24 volts to a contactor ... you can limit the times when the AC runs by cutting one of the wires, and insert ST01 as shown., but a programmable thermostat can do same job. It might be possible to override the thermostat operation and turn power ON when thermostat calls for off. The wire to ST10 does not need power, or it can have 12-24 AC/DC or 120, 208, 240, 277 volt AC. Timer red wire is capped. ST01 is programmable, or dusk-dawn timer. Dusk-dawn means timer is ON at night. Choose up to 6 on-off programs, or choose dusk-dawn. (either-or, not both) If you connect timer red and blue wires together, then timer programming is reversed, so timer is ON in day and OFF at night, or timed programs are inverted. You can simply cut a control wire, and insert ST01 as shown. Timer red wire is capped. If you connect timer red and blue wires, then timer programming is reversed... THIS means what? ST01 is programmable, or dusk-dawn timer.Choose up to 6 on-off programs, or choose dusk-dawn. (either-or, not both) Dusk-dawn means timer is ON at night. Use ST01 without any voltage, or with any voltage Buy: Intermatic ST01c timer at Amazon/ 1 year warranty |
Larger image  ST01 uses CR2 battery |
Why
can ST01 and Ei600 timers operate without voltage or control any
voltage? Including 24 Volt AC/ DC or 120-208-240-277 volts Because the timer is battery-operated. Battery lasts 2-3 years. Because the timer does not need to be connected to 120 Volt AC or 240 Volt AC power to operate. Just the battery is needed Timer can be located inside electric box, anywhere outdoors-or-indoors. Buy ST01C white, ST01AC almond: Intermatic ST01c timer/ 1 year warranty ST01a almond Ei600 5-year warranty timer at Amazon CR2 replacement battery at Amazon Resources: How to program and wire ST01 timer Use ST01 as 24 volt photoeye Load ratings for Intermatic timers/ pdf Load rating for ST01 timer: 120V ac, 6A, 208-277V ac; DC Loads 4A 12V dc, 2A 28V dc; Motors 1HP 120VAC, 2HP 240V ac, Ballast 16A 120V ac, 208-277V ac; Resistive 20A 120-277Vac. |
| Sellers of these products
often don't know the numbers ST01C is white, and ST01AC is almond... so if the seller is showing ST01, then timer is probably white. http://waterheatertimer.org/ This is a very unique timer... can be used for many applications... motor control, photoeye, reverse photoeye, solar controller, HVAC controller, override any hardwired timer, stop doorbell from ringing certain times or day or all night |
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 Red-Blue-Black-green wires LED display is not illuminated |
How
to wire ST01 timer Connect 24 V AC to black wire Connect Load to Blue wire Cap off Red wire (red and blue connected, reverses timer programming) Resource: How to program and wire ST01 timer |
 Testing the ST01 timer |
Other
uses for ST01 timer: ST01 timer controls water heater or any 240 volt load Reverse ST01 using Intermatic air switch / Resource: Intermatic air switches Use ST01C for 4-way timer ST01 24 volt DC photoeye Convert single-pole switch into 3-way switch using ST01/ Resource: How to add a switch How to add 3-way switch Use battery-operated ST01 timer for any voltage, or requires no voltage to operate, 24-hour, or 7-day, or dawn-dusk, or dusk-dawn, Add a 3-way switch, or 3-way switch, or 4-way switch, used in place of photoeye, reverse photoeye, control 24 volt DC, turn off 12 volt doorbell when baby is sleeping, control motor load, control 3-phase, interface with delay timer |
 Larger image/ amico timer with dust cover  Dust cover |
 CN101A
timerAmico panel mount timers 24 volt AC timer 7 day 17 on-off settings To override thermostat.... Connect 24 VDC power to timer terminals located on right side Connect thermostat wire to switch terminals located on left side.... Buy from my associate links: 24 volt AC timer Amico 120 volt 7-day timer 12 Volt/ 16 amp/ DC timer at Amazon 24 Volt/ 16 amp/ DC timer at Amazon Dust cover for Amico timers at Amazon Amico timers at Amazon Transformer: 120-240 Volt to selectable DC voltage Resources: CN101A/ amico timer manual/ pdf with wiring How to wire amico timer Terminals |
  Timer Modules |
24-hour modules
with trippers Buy 120Volt at Amazon 240Volt at Amazon Replacement trippers Resources Spa Module timers and manuals Modules with segments Buy: 120V at Amazon 240V at Amazon Resources Intermatic PB800-900 series Intermatic timer modules |
Wiring
for timer modules shown on left These modular timers have 4 terminals
Connect Hot from breaker to one of the clock terminals and to one of the load terminals, Connect hot to load to other load terminals. Connect neutral from breaker and neutral from load to other clock terminal. |
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B003OYJRB2 Leviton WSSLT-10 SLT Circuit Interlock Transmitter, 120VAC, White Skylink anywhere wall switch Buy: Transmitter switch at Amazon Receiver at Amazon Resource: Skylink wall switch manual Skylink on-off-dim module manual Skylink on-off module manual Product information at Leviton |
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 When
amp exceeds set
point, the relay activates 120 volt circuit.Use relay to control contactor when load exceeds 50 watts Use to activate duct booster fan Take off bracket and install bracket around a control wire that carries amperage. When amperage flows across line, the Aprilaire relay activates... and closes circuit going to 120 Volt load... such as indicator light... or another relay etc... the indicator light turns ON. Buy Aprilaire relay at Amazon Current sensing relays Resource: Aprilaire manual .pdf |
Multimeter Test for breaks in wire/ Test for voltage Most appliance require 80% rated voltage to function correctly Buy Analog multimeter Multimeters at Amazon Klein multimeter Electric testers at Amazon Clampmeter for testing amp flow on line Resource: How to test and replace element How to test thermocouple Element tests for 120 volts How to test wire |
Safety
when testing wires:
Never touch wet or previously flooded appliance. Never stand on wet surface when working on electric. Never stand on bare soil, put down dry boards. Tape tester leads to wood sticks to keep hands away from power. Use non-contact voltage tester before touching wires. Never touch or lean into any made of metal. Remove metal objects from pockets. Do not use oxygen or fuel accelerants in same room as electrical repairs Resource: Basic house wiring |
 Non-contact voltage tester Test for power without touching connectors NEVER assume power is OFF Buy: Non-contact voltage tester Amazon Electric testers at Amazon Resource: How to test electric power is off |
 120 volt 15 amp devices
including GFCI, timers, switches, plugs, wifi controls etc can be
installed on 15 or 20
amp
breaker.120 volt GFCI, outlet, receptacle that is rated 20 amp can be installed on 20 amp breaker only, but NOT on 15 amp breaker. Buy 15 amp GFCI 20 amp GFCI |
Buy Basic electric book Home plumbing/ electrical codes  Or learn about basic household electricity... use and search my site/ Resource Safe electric wiring Basic house wiring |
 Use outlet tester to check for correct wiring on any 120 volt straight-blade outlet. Buy: Klein testers Outlet tester Circuit breaker finder Electric usage monitor |
Twist-on wire connector assortmentsDo not reuse old connectorsTwist wire connector very tight. Pull wires to ensure they will not come loose. Cover all bare copper. Buy: Connector assortment at Amazon Connector assortment at Amazon Resource How to select and install twist-on wire connectors |
 Electrical tools must be insulated. Always best to disconnect power, but insulation failure, lack of proper grounding, grounded neutral, lack of GFCI, out-of-code wiring, generator operating without transfer switch, and other problems still pose a risk to anyone working on electric power ... even when breaker is off. Buy: Electrician tools kits Klein tools Tools kits |
Connect wire to screw terminal Use only 600 volt solid copper wire. Do not use stranded wire or extension cord. Do not use solder anywhere on residential 120-240 volt wiring. Attach electric installation to structure. Tighten screws very tight against wire.  Buy: NEC books Dewalt plumbing/ electrical codes Basic electric book National electric code guide/ illustrated Resources: How to twist wire How to select and install twist-on wire connectors |
 Insulated
lever switch on outdoor lightsOperate outdoor toggle switch safely ... and easily Replaces outdoor cover. Install over top of ordinary toggle switch. Works with single-pole, double-pole, 3PST, 3-way, 4-way switches etc. Buy: Best choice: Cantex lever switch Outdoor lever switches at Amazon |
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Push-on wire connectors in place of twist-on connectorsBuy:Push on wire connectors Amazon Red 3P connector for 10-14 gauge wire Lever connectors for stranded wire at Amazon |
 Use nipper instead of pliers or screwdriver for removing staples (and nails). Do not damage cable or wires inside cable. Code -Cable SHALL BE secured without damage to the outer covering. NEC sec. 336-15 Buy End cutting nippers at Amazon |
   When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point. Buy tools: Wire strippers at Amazon Linesman pliers Pro linesman plier Needle nose pliers End cutting nippers at Amazon |
 Weather resistant plastic box for outdoor extension cord connections, Christmas lights, outdoor power strip etc . Not for connecting wires with wire nutsŪ, or in-wall wiring, but can be used indoors to organize extension cords, power strips etc. Weather resistant is not weatherproof or watertight. Use enclosures rated IP65 and IP67 for waterproof. Extension cords cannot be used for permanent wiring. Buy: Large-medium-small electric cord box Socketbox Raintight enclosures Water-tight cord lock Resource: Enclosures and boxes |
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See inside main breaker box |
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What is 3-phase electric: power plant to end
user
How to wire 3-phase timer |
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Resource: Compare box timers DPDT timers Intermatic Control water heater w/ Z-wave |
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Resource: Intermatic control centers: and parts Digital control centers and parts Tork control centers and parts Subpanels All control centers and parts Enclosures |
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Resource: Programmable timers Countdown timers Off delay timers On delay timers Timer modules Din rail Twin & one-shot Woods Intermatic Tork |
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