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I have an old intermatic (1983) freeze guard that I am trying to wire into my pump timers. 4 wires are 2 for load and 2 for line in. 2 orange and 2 red. Which color is the load and which color is the line ?

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To determine which set of wires are the LINE wires from the freeze guard:

First turn the thermostati have an old intermatic (1983) freeze guard that - 2_bing.gif to the HIGH setting (so that it turns the load OFF), then pick a set of wires (say the red wires) and connect them to 240 volts. Turn the thermostat to the LOW setting (so that it turns the load ON). If you picked the right set you will hear the relay kick in _and_ the other (orange) set of wires will then have 240 volts on them.

If you picked the wrong set of wires to start, you won't damage anything because all you will be doing is energizing the load side of the relay contacts. In which case, nothing will happen after you turn the thermostat to the LOW setting (to make it turn the load ON), and no voltage will e on the other set of wires either.

What it boils down to is just hook it up. If you connect it wrong it won't damage anything, it just won't work. If it doesn't work swap the wires.

Posted on May 11, 2010

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Intermatic T103P Timer (120V) Wiring Guidance


Copy following link for T103 timer wiring options:
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Jun 08, 2012 | Intermatic Hardware & Accessories

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I want to replace a Paragon 4004 20M with a Intermatic T104M. The Paragon has 4 screws along the bottom and one more on each side higher up for a total of six. The Intermatic has six, plus the ground. ...


1) These timers are interchangeable.

2) These timers can be complicated. Both handle multiple voltages and can be wired many ways depending on load requirement, wire from breaker box.

3) Description of Load(s), voltage(s) and wiring is not described in question. Add a comment with specific information for detailed help.

4) The 4004-20 timer has wiring terminals 1 2 3 4, plus terminals 5 and 6 that are connected with a brass bridge to terminals 1 and 4.
Since the terminals are connected with brass bridge, terminals 5 and 6 can be considered same as terminals 1 and 2.
If the brass bridge is removed, then the timer can be wired many ways to control multiple voltages, and then terminals 5 and 6 are independent.

5) Intermatic T104 timer has terminals A 1 2 3 4
Intermatic T104 terminal A is not used except as a bare post for Neutral wire, and if timer is wired to control 277V or 440Volts. Or if timer is adapted in other manner.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

6) When controlling ordinary 2-wire 240Volt load like a pool pump, here is crossover wiring.
Paragon terminal 1and5-bridged goes to Intermatic terminal 1
Paragon terminal 2 goes to Intermatic terminal 2
Paragon terminal 3 goes to Intermatic terminal 4
Paragon terminal 4and6-bridged goes to Intermatic terminal 3
Intermatic terminal A is not used in this case.

Sep 13, 2011 | Intermatic T104M 208-277Volt 40-amp Timer...

1 Answer

I had an intermatic 220 timer that died. I am trying ti reconect my wires to a replacement timer from GE. The GE is the 208-277 VAC. On the intermatic there was two red wires connected to the second...


Necessary for you to match up terminal numbering with actual numbers for each timer.
Information below is for 240volt timer controlling one single 240Volt load.
GE15601 has terminals L 1 X 2 from left to right
Intermatic T104 Has terminals A 1 2 3 4 from left to right

Here's the crossover from 240Volt T104 Intermatic to 240Volt GE 15601 for single-240Volt-load
Intermatic terminal 1 connects to GE terminal L
Intermatic terminal 2 connects to GE terminal 2
Intermatic terminal 3 connects to GE terminal 1
Intermatic terminal 4 connects to GE terminal X
Intermatic terminal A is not used in typical 2-wire 240volt circuit.

More links:
http://waterheatertimer.org/GE-timers-and-manuals.html#15601
http://waterheatertimer.org/images/GE-15307-wiring-250.jpg
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html
http://waterheatertimer.org/images/T-104-control-240V-Load4-35.jpg

Jul 30, 2011 | RTO Intermatic T106M Timer Mechanism Only...

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Have a intermatic sprinkler timer that is has been reconnected to the pump. it works in the manual mode but the timer does not work looking for help on the wiring (video for dummies preferred)


No video.
If manual override works, look to see if dial rotates on time for full 24 hours. If dial keeps good time, then timer clock motor is wired correctly. If dial stops rotating after tripper passes, then wiring is wrong. If trippers are absent or worn down then timer will not turn Load on-and-off.

How to set timer, and troubleshoot timer:
http://waterheatertimer.org/pdf/How-to-Set-and-Troubleshoot-Intermatic-sprinkler-timer.pdf
http://waterheatertimer.org/How-to-troubleshoot-Intermatic-timer.html

How to wire timer:
You posted under R8806P101C 240Volt timer without rain sensor connections.
http://waterheatertimer.org/pdf/Intermatic-r8806p101c-manual.pdf
If this is not your timer, then add a comment with model number that appears on door panel.
The wiring block has 4 screw terminals. From left to right: 1 2 3 4
240Volts cable has two hot leads from breaker box. Hot leads from breaker box connect to screw terminals 1 and 3.
Timer operates 240Volt pump load. Cable to pump load has 2 wires. Connect Load wires to terminals 2 and 4.

Open following link for resources:
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#sprinkler

Jun 28, 2011 | Intermatic R8806P101C -...

1 Answer

What configuration do the output power wires look like. Do I connect to 3 and 4 , slots etc. What is meant by "load" in the instructions?


1) You posted under ET104C DPST (double pole single throw) 24-hour 4-ON and 4-OFF per-day selectable-voltage timer
DPST means that timer will turn off two wires going to 240Volt Load or two separate 120V Loads

Open following link for example Intermatic ET series wiring diagrams and manual:
http://waterheatertimer.org/How-to-wire-Intermatic-ET-series-timer.html

2) Load means whatever electrical device is controlled by timer. ie fan, light, motor, pump, alarm-bell, water-heater, bowling-ball-machine etc.
Line means cable coming from breaker box.

3) If you have a different timer, then add a comment with photo of inside of timer door for possible identification and complete answer.
http://www.fixya.com/support/r6568559-post_photograph_fixya_questions_answers

4) Selectable voltage means you have to choose voltage.
Timer come preset for 240Volts.
If you have 120V 208V or 277V, then follow the vague instructions shown on page 2 #2 of manual.

5) Do not apply voltage to this timer before matching selectable voltage setting with circuit breaker voltage.

6) ET104C has 6 terminals and can be wired many different ways depending on Load voltage, etc.
This timer can do a lot of different things.
If you have ET102C with 4 terminals, then add a comment and clearly explain voltage, color of wires, and what breaker you have and what Load you are controlling for best answer.

7) ASSume you have 240Volt cable coming from breaker box, and that you are controlling a single 240Volt Load like a water heater or pool pump.

240Volt cable from breaker will have 2 hot wires called Line 1 and Line 2
Line 1 black wire will attach to both terminal 1 and terminal 3 (use a jumper wire between terminal 1 and 3)
Line 2 red or white wire will attach to both terminal 2 and terminal 5 (use a jumper wire between terminal 2 and 5)
Your 240Volt Load will also have 2 wires.
Load 1 black wire will attach to terminal 4
Load 2 red or white wire will attach to terminal 6

Add a comment for more free help

Also take advantage of fixya expert assistance live.
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Fixya is always less expensive than a service call.

Apr 23, 2011 | Intermatic INC ET104C 24 HOUR ELECTRONIC...

1 Answer

Hi! Please help me. I am having trouble connecting the wires from my dead 220v T104 pool pump timer to a new 220v T104 timer. The old timer had posts marked G 1 2 3 4. The new one has posts marked L 1 X...


Open following link for T104 wiring diagram:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Your new timer is L 1 X 2, so that is not Intermatic T104.
You might have GE/Tork 15061 that fits into Intermatic box.
http://waterheatertimer.org/GE-timers-and-manuals.html#GE-replacement
First thing to check is if new timer is 240Volts to match old T104.

If new timer is 240V, then here is crossover:
"Old 1" goes to new L >> and notice that L and 1 are connected by brass bridge. If bridge is missing, add a jumper wire between L and 1 on new timer

"Old 2" goes to new 2

"Old 3" goes to new X
"Old 4" goes to new X

T104 Intermatic timer is SPDT single pull double throw, so it turns off both wires going to Load.
New L1X2 timer is SPST single pull single throw, so it turns off one wire going to Load, and that's why old 3 and old 4 both connect to terminal X.

If this is too complex, then add a comment or buy new trippers and a new WG1573 clock motor and repair T104 for $20.
http://waterheatertimer.org/Intermatic-trippers-and-parts.html#T100

Apr 22, 2011 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

What you mean put line to ground can this be done? could u explain what are those wires for?


1) No you don't put 'line' to ground in any application.
But people use the word 'line' to describe a cable or a wire.
So your question is not clear, or maybe an answer you got from someone is not clear.

2) Let's go over wiring for T104 timer.
You posted under T104 Intermatic 240V timer.

3) Electricians use the words 'Line' and 'Ground' to mean specific things:
Line wires are wires that come from breaker box and go to timer.
Load wires are wires that leave timer and go to Load (light, fan, motor, pump)
Ground wire is extra safety line that is bare copper or green insulated wire.

4) How to wire T104 240Volt timer:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

Line wires from circuit breaker connect to terminals 1 and 3.
Load wires going to Load (light, fan, motor, pump) connect to terminals 2 and 4
Bare ground wire connects to green ground screw.
Terminal A does not have any wire in typical 240V connection. So terminal A has no wire.

5) If your power is 120V, then T104 is not the right timer.
You might need T101 or T103 depending on what you are doing.
Add a comment if needed.

6) If you have a different timer than T104, add a comment with specific brand and number that shows inside timer door. I have wiring diagrams for most box-type timers.

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 01, 2011 | Intermatic T104 24h 208-277v Mechanical...

1 Answer

Hi expert: I am installing intermatic P1353me digital pool or spa mechanism and having trouble to figure out how to do this heater Firemen Switch connection. My existing pool timer is T104 and there were...


1) Fireman's switch automatically turns off heater few minutes before turning off pump.
Not all pool timers have fireman's switch.
If old timer did not have it, then don't worry about it.
P1353 has wires marked for fireman's switch, so simply don't use them if you don't want to.
http://waterheatertimer.org/pdf/Intermatic-P1353-manual.pdf
page 21 of manual shows wiring for fireman's switch.

2) T104 and P1353 comparison
Difference 1: T104 turns OFF both hot wires, while P1353 turns Off 1 hot wire.
http://waterheatertimer.org/Compare-120-and-240.html
Difference 2: T104 controls 1 240V load with 1 time schedule, while P1353 controls 3 different 240V loads, each with different time schedule.
Check that wire(s) coming from breaker can handle all 3 loads.
http://waterheatertimer.org/Color-codewire.html

3) 240Volt T104 is wired as follows:
http://waterheatertimer.org/images/T-104-240-Volt-400.jpg
Hot1 from breaker connects to T104 terminal 1
Hot2 from breaker connects to T104 terminal 3
There is constant power on terminals 1 and 3, each terminal has 120V when combined makes the 240V circuit.
Load1 wire connects to T104 terminal 2
Load2 wire connects to T104 terminal 4
Terminals 2 and 4 have power whenever timer turns ON

4) Definition:
In electric wiring, Line means power from breaker, and Load means wire going to light,fan, motor, pump.

5) Converting T104 to P1353
http://waterheatertimer.org/images/P1353-timer-350.jpg
http://waterheatertimer.org/images/P1353-terminals-566.jpg
Hot1 from breaker connects to P1353 terminal 1
Hot2 from breaker connects to P1353 terminal 2
This will power timer electronics and timer clock and switches.

Jumper wire is placed from Hot1 at terminal 1 to each Line terminals 3 5 and 7.
This will put power at the switch, and when switch turns ON, then power will flow from Line wires to Load wires and then on to the Load.
Load 1 connects to terminal 4, Load 2 connects to terminal 6, Load 3 connects to terminal 8
To complete each 240V circuit, Hot2 is connected directly to each Load.

6) You say 'salt' system connects to terminals 1 and 3 on T104, then those wires are carrying constant 240V to that device. So Salt system connects to terminals 1 and 2 on P1353

7) Get a second opinion:
I frequently contact Intermatic for various problems.
P1353 is fairly new product, and manual is long, and I might not fully understand your problem or wiring.
Intermatic answers their email.
http://www.intermatic.com/customer%20service.aspx

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, expert speaks with you over phone while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 28, 2011 | Intermatic Digital 3-Circuit Timer...

1 Answer

I have an old intermatic (1983) freeze guard that I am trying to wire into my pump timers. 4 wires are 2 for load and 2 for line in. 2 orange and 2 red. WHICH COLOR IS THE LOAD AND WHICH COLOR IS THE LINE...


There is not a set color code when it comes to that stuff. If the timer is still connected and there is power to it, turn the manual ON/OFF lever inside the timer to the OFF position. Using a volt meter set to at least 240 volts, test the wires. The set of wires that are still hot are the LINE wires.
If the timer has altready been removed, you'll have to _carefully_ separate all the wires so that they aren't touching anything and re-energize the circuit from the breaker. Then test the wires. The 2 wires that are hot after re-energizing the circuit will be the LINE wires.

Mar 16, 2010 | Intermatic Electrical Supplies

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