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How to wire a mechanical room thermostat. There does not appear to be a neutral terminal.

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Some thermostats don't have a terminal for a common wire. They just receive 24vac from the transformer and when there is a call for cooling or heat closes contacts that send power to whatever relay or contactor that needs to be operated.

Posted on May 02, 2010

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1 Answer

Positive and neutral on satchwell geyser thermostat


with only 2 terminals it will not matter which wire goes on the terminals
a thermostst is just a spring loaded switch that is adjusted by the knob
the points of the switch are pushed apart by the thermostat medium and the pressure need is set by the spring from the knob
so it is power in -power out= no matter which wire is connected to which terminal

May 13, 2017 | GPS

1 Answer

Just wired up the gp24 ,connected mains,switch and nuetral, working on manual mode but clock not turning


Reverse wires on terminals 3 and 4

1) GP24 appears to be 24-Hour version of Greenbrook T100 series mechanical timer, with Grasslin analog time dial.
http://waterheatertimer.org/pdf/Green-brook-T100_CInstructions.pdf
http://waterheatertimer.org/How-to-set-timers.html

2) If clock is not rotating, then probably your wires are reversed.
Reverse wires on terminals 3 and 4.

3) Power from Mains, and wire to Load each have 2 wires.
Hot live from Mains connects to terminal 3
Neutral from mai9ns connects to terminal 1
Neutral going to load connects to terminal 1
Hot going to load connects to terminal 4

Dec 08, 2012 | Hardware & Accessories

1 Answer

I would like to know how to wire my timer to my breaker box and pool pump? it a t101m 120v.. my pump has a white and black wire and some to my timer to my box


Wiring diagrams for T-101 appear on following link:
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T101

Hot wire goes to terminal 1
Neutral to terminal A

Black wire to pump goes to terminal 2
White wire to pump goes to terminal A along with Neutral wire.

Electricians don't guess, they test.
So lets test wires for sure:

Separate wires.
Use ordinary 2-wire tester from hardware store.
Tape tester leads to wood sticks so hands are away from power.
Do not touch anything metal, stand on dry boards.
Turn power ON.
Test each wire to bare ground wire.
Tester lights up on Hot wire. Hot wire connects to terminal 1.
Hot wire is identified.
Test Hot wire to all other wires in box, except bare ground wire.
Tester lights up on Neutral wire. Neutral wire connects to terminal A.
Your other two wires go to Load.
Connect Load black to terminal 2
Connect Load white to terminal A

Add a comment for more free help.
Also take advantage of fixyas phone service.
For a price, fixya expert speaks with you over phone while you work on timer.

Jan 08, 2011 | RTO Intermatic T101M Timer Mechanism Only...

1 Answer

I need to replace an old Thermostat that just has 3 wires coloured Red, Blue and Yellow. The Honeywell THR830TUK Thermostat I have bought shows 5 wires on the diagram. I'm not sure which wire goes into...


The honeywell THR830TUK thermostat does not require a neutral as shown in the instructions.Connect the LIVE to terminal "1" and your YELLOW SIGNAL wire to terminal "3".
Connect your EARTH (if you have one) to the EARTH connection on the top left hand corner of the thermostat and blank off your NEUTRAL wire with a block connector.These instructions were supplied to me by Honeywell Customer Support.Hope this helps.

Jan 08, 2011 | Heating & Cooling

1 Answer

Samsung dryer Mod DV328AEW/XAA electric 220v dryer tumbles but does not heat.I've checked and power is 220v (working) There appears to be no burnt wiring, inside. and heating coils appear to be intact.


HI. Ok, this unit is equipped with four thermostats that monitor the cycling information and the heater box for optimal operations. All of the thermostats should be tested for proper functions. I suspect that the culprit will be the thermostats mounted on the heater box, but test all to isolate.

Here are all the thermostats that are to be tested, below:

1. Thermal fuse - This will be mounted on the side of the heater box(chamber). Test properly to confirm its functions.
2. Cycling Thermostat - This will be mounted on the blower housing.
3. Cycling thermostat(2) - mounted on the blower housing
4. Hi-limit thermostat - Mounted next to the thermal fuse on the heater chamber/box.


Concerning the element:

You cant always tell by looking. This device must be tested to confirm that it is indeed working as designed. It should show some signs of continuity if it is indeed functioning.

Proper testing technique for most thermostats and fuses:

Label the wires and connections so that you can properly reconnect them later. The wires are connected with slip on connectors. Firmly pull the connectors off of the terminals. You may need to use a pair of needle-nose pliers to remove the connectors. Inspect the connectors and the terminals for corrosion. If either is corroded they should be cleaned or replaced.To test the thermostats or fuse, set the multimeter to the ohms setting X1. Touch one probe to each terminal. You should get a reading of either zero or infinity. At room temperature, the thermostats should have a reading of zero. When the thermostats are heated to their limit temperature, they should switch off and you should get a reading of infinity. The fuse should be tested at room temperature for continuity.


Jul 30, 2010 | Samsung Dryers

1 Answer

How do I wire a Honeywell room thermostat T6360B1028?


The red goes to R or rc and the blue would go to C or common sometimes its BK on the thermostat and the yellow would go to Y.

Jan 22, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

How do i change an old style honeywell room stat


Shut the furnace off for starters. Remove the old Thermostat. As you remove each wire write down what terminal it wen to.

Example:
Red wire usually goes to R-Power
Green Wire usually goes to G-Fan
White usually goes to W-Heat
Blue or Yellow usually goes to Y-Cool

Jan 04, 2010 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

My heat is turning on but the fan isnt working. my honeywell thermostat is showing a flame and a blinking battery, and i know nothing about this thermostat, we just moved in . Can u help?


This is not a PC problem
Symptom
Heating comes on, but sometimes it
gets too hot, sometimes too cold.
Neutral not connected
Cure
Check wiring in room thermostat. Look for a
connection to the Neutral terminal (N 2 on
the Honeywell T6060, T6160, and T6360).
Make sure that it is connected (check
continuity).
If there is no neutral available, replace with a
two-wire thermostat, e.g., CT200, CM61 or
CM67. These will also offer extra energy
savings, (Without a neutral connection, the anticipator within the room thermostat does not work,
so the temperature control reduces from ± ½ºC to ±3ºC. People can feel a six degree
temperature swing. Then, if they try to adjust the room thermostat to overcome the
problem, the temperature swings become even worse.)

Mar 16, 2008 | Computers & Internet

1 Answer

Changing a room thermostat a potterton to honeywell t6360


I think I've done it - but don't take this as absolute truth.
For the Honeywell T6360B the original Potterton wiring should be rewired as follows:
Brown [Live] goes to terminal 1; Blue [neutral] goes to Terminal 2 and the yellow/green [which is not an earth but a switched live - i.e. gives live to the heating system when the thermostat clicks in] goes to terminal 3.
Obviously all done with the power isolated and when it was switched back on we had heating again :o)
It's been on over two hours now and all seems fine.

Jan 13, 2008 | Honeywell Programmable Thermostat Heater

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