Question about Intermatic T104-20 Indoor Hot Water Timer
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.
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
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
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
Posted on Aug 21, 2009
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
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
T103 has 120Volt clock motor, so we can wire this timer.
T103 timer is rated for 30 amps and 2horsepower and your blowers use 28 amps.
So we're getting close to max on the timer. Hopefully blowers won't all be started at one time since motors draw maximum amperage when they start.
However, you need 30 amp breaker and orange 10 gauge wire for that much amperage >> unless only one blower is turned ON at any given time.
Always match wire size, amperage of breaker and amperage of Load or it will trip the breaker.
If you put 30 amp breaker on size 10 wire it is good. But 30 amp breaker on smaller size 14 or 12 gauge wire is fire hazard.
Add a comment at any time, and I will respond
Look at the basics:
You have 2 cables.
One cable comes from breaker box.
Other cable goes to three 120V plugs (120V is same as 110V).
Each cable has black-wire, white-wire and bare-copper-ground-wire.
How to wire the timer.
Timer has 5 terminals: A 1 2 3 4
A) Cable from breaker box:
White wire from breaker connects to terminal A
Black-wire from breaker connects to terminal 1
B) Cable going to 3 plugs
Black wire to plugs connects to terminal 2
White wire to plugs connects to terminal A
Ground wires connect to green ground screw.
Terminals 3 and 4 are not used in this case.
Here is a wiring diagram that shows 120Volt from breaker box and 120Volt going to Load
Posted on Nov 27, 2010
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