Question about Intermatic T104-20 Indoor Hot Water Timer

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WIRING IN A ROOM STAT

I need to wire in a room stat to a siemens rwb 30 timer on a combi boiler system.The heat is either on or off at the moment with no temp. control.I do not the instructions of the timer so not sure if any of the un-used terminals are for a stat.I know i can wire the stat in to the presently used terminals to the pump then to the pump afterwards but would rather use the terminals if there are any specifically for this.
I have been on siemens website but cannot find a wiring diagram.

Thank you.

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  • Rob Duron
    Rob Duron May 11, 2010

    You want to use the timer to power down the combi boiler when it's not needed and a room stat for temp control. right? what is the boiler make and model?

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5 Suggested Answers

gotgeek2
  • 565 Answers

SOURCE: clock doesn't work

The wiring diagram for that timer is somewhat misleading. The 120 volt clock timer motor is connected internally to the "A" (neutral) terminal and the #3 terminal. The "A" (neutral) terminal is to the immediate left of the #1 terminal.
Here's how to do the wiring for your use, (assuming a 120 volt supply circuit and a 120 volt lighting or other load):
Connect the incoming power (line) black wire to terminal # 3. Connect the incoming (neutral) white wire to terminal "A".
Connect the outgoing (load) black wire to terminal # 4.
Connect the outgoing (neutral) white wire to terminal "A".

Posted on Mar 08, 2009

john224
  • 1378 Answers

SOURCE: Bought an Intermatic T104 Timer for a 120v pool

T104 series intermatic timers are 208/230/277 volt clocks, not 120. I believe you have the wrong model and need a T101 series instead.

Posted on Jun 13, 2009

  • 103 Answers

SOURCE: Intermatic T103 timer wired for 240V

yes u will, but u will have to make sure one of the motor wires are hooked up that way also, in case it has been moved, here is a link with the diagram u need

http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/t103%20-%20english.ashx

Posted on Aug 21, 2009

  • 243 Answers

SOURCE: Bought a Intermatic sprinkler timer. need help.

reading the specs i should say its a timer for only one zone. you can use it for one zone switching or for the pump. sorry.

Posted on Feb 14, 2010

  • 2841 Answers

SOURCE: I have purchased a Utilitech

What you have a single pole light switch you are replacing with the timer. As you say you have 2 black wires. One black wire is the incoming power wire and the other black wire goes up to the light. On a normal single pole switch is makes no difference which of the screws you connect it to. Of course with the exception of the ground screw. Tie all the white wires back together that are in the wall box and shove them to the rear as they are not needed to make this connection. The correct connection is to connect one of the black existing black wires in the wall switch box to the black wire on the timer. Now connect the other black wire to the blue wire on the timer. The red wire is not used in a single pole connection and is only used in a 3 way switch connection, so just put a twist connector on it and shove it back in the box. To recap, connect black wire on timer to either black wire in box. Connect the other blue wire to the other black wire. Do not use the red wire. Hopefully you did not hurt the timer by connecting it incorrectly. If it does not work after setting the timer up according to the instructions you have ruined the timer by wiring it incorrectly. Hopefully no damage has been done.

Posted on Aug 14, 2010

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