Question about Honeywell International Honeywell EMM-3UK Zone Control Kit

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Wiring for zone valves - Honeywell International Honeywell EMM-3UK Zone Control Kit

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Here is a site for your system but not sure what you need to know, if you need more hwlp post here and I will help you. http://dticorp.com/catalog/honeywell-emm3uk-conventional-zoning-p-4341.html#

Posted on Oct 05, 2009

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All of the sudden, my Honeywell zone valve opens all the time even with thermostat lowered.


Have you checked to see if you are getting a power call from the thermostat to the valve? Possible Zone valve stuck open. Pull wire off valve to see if valve closes if not then valve is bad. If valve closes then you need to check to see if you have a wire shorted over from power supplied from stat> If supply wire to valve from stat is making contact with power wire supplied to stat this will keep valve open all the time.

Dec 17, 2014 | Honeywell Heating & Cooling

1 Answer

How do I connect a 24v damper motor with 6 colored wires red white yellow green blue black to NO COM NC terminals.


Choose two colors of the thermostat wire, and connect them to the NO and COM and connect them to the zone control board leads for the zone intended. Almost all zone valves spring return open when deenergized. So ensure the zone valve is open with the system is off. At the base of zone valve there is a set screw that needs to engage the damper valve shaft in the open position with the motor in the spring release position. Most zone valve are 90 degree moment from full open to full shut. If you have a Carrier zone valve, they go full open to full shut in 45 degrees of motion. Your open stop need to be set so the valve stops in the full stop position.
To help understand the operation of a zone system, say you have 2 zone system and zone 1 thermostat initiates a heat or cool demand. Zone 2 valves energizes and shuts and zone 1 stays open and allow air to heat/ cool zone 1. If zone 2 thermostat simultaniously initiates the same heat/cool demand, the zone 2 valve opens and both zone heat/cool. When either thermostat is satisfied the opposite zone valve closes and when both thermostat are satisfied both zone valves open.
Hope this helps you understand zone operation. The same works for higher multizone systems.

Jul 27, 2014 | Honeywell Motorized Small Rectangular Hvac...

1 Answer

I have a Toro 240-06-04 which is almost identical to the 250. My sprinkler system on the number one valve quit working. I thought maybe it might be a solenoid, so I replaced that and it still didn't w


Connect the wire form a working zone to the valve to zone 1. If the zone comes on you have short in the wire for zone 1. You can confirm this by connecting it to the valve that was working and it probably will not. If you have a spare wire connect it to zone 1 and in pin 1 at
the timer.

If valve still does not open and you replaced the solenoid (which is rarely the problem) the hydraulics are probably worn out in the valve. Purchase the same valve and switch out everything accept the valve body itself essentially rebuilding the valve.

Bad wire, no spare and you want to avoid running a new stretch. Merge this zone with a similar one by connecting both valves to 1 wire. If the pressure is good they should all work as 1 zone. Otherwise you will have to run a new stretch.

Apr 21, 2014 | Toro 250-06-04 1 in. FPT Electric Valve...

1 Answer

Connecting 2 wire thermostats to white-rogers type 1311 3 wire zone valves


Thank you for your interest with Emerson White Rodgers. My Name is Joselito Laxamana from technical department. Make sure to connect a thermostat that will power open and powered closed the zone valve. I pretty sure that the two wire thermostat that your going to connect will not be compatible. To better assist you with this further contact us directly at 18002842925.

Oct 15, 2012 | Heating & Cooling

1 Answer

I have a two zone water baseboard system... I installed a new zone valve to the upper zone which was not calling for heat.. the only heat it got was when the lower zone was circulating... Now the upper...


Good clues to work with--
Let's review how you wired up the Zone Valves, in relation to the Boiler Control panel...

You say the upper zone does NOT SHUT DOWN--
Does that mean it is OPEN ALL THE TIME?-- (even when the circulating pump is OFF? )
That sounds like the thermostat is not even in the circuit, then.

Have you been able to cycle each of the valves thru their cycles-- Open- and then closed?
-- It almost sounds like you have an interconnection between the two valves-- is this possible?

Each Thermostat has to control its valve only...
and most systems do this thru a control panel at the boiler--
So-- How is your control panel connected to the 2 thermostats, and how are the 2 zone valves connected to the Control board?

Are you following a wiring schematic for hooking the valves and thermostats to the control board?
There should be a schematic with the new valve you must installed, right?
did you wire it like the instructions showed?

Make a few more tests, and get back with us--

Mack B

Jan 18, 2011 | Heating & Cooling

2 Answers

White rodgers zone valve will not shut off by thermostat. you can shut off heat manually.


if this is a 13a zone valve it will have the wires in the front with a bunch of little holes for the wires. try to push each wire into there holes because sometimes they come loose and stop the valve from opening and closing. let me know how this works for you.

Dec 20, 2010 | Heating & Cooling

1 Answer

I have a Weil-McLain hot water boiler for baseboard heat. The system has one circulator pump. The system has 5 zones - 3 work fine and two are not working. All the zone valves and thermostats are...


Hello.Prob#1 valve has a bad END SWITCH,change the power head,thad brings the circ on when open.Prob#2 try manual overide lever.iS IT TIGHT OR SMOOTH?DOES IT JUMP/SNAP?motor very hot? all bad signs.Change that power head too.The transformers are OK because 1 trans can only run 3 valves max.

Sep 20, 2010 | Honeywell (CT62B1015) Baseboard Heater

2 Answers

Newly installed white-rodgers zone valve works for a while then eventually moves to manual (or open) on its own. Suggestions on how to keep valve in a closed position? Chris in Alaska


This problem has to be in the way the valve was wired. Wrong zone valve-Normally open instead of normally closed-power interuption causing valve to open. Faulty T-stat/ Most likely wired incorrectly.

Sep 13, 2009 | Plumbing

1 Answer

How do i install a zone valve in my hot water heater. I need the schematic from boiler controller to the valve. if I tie the first floor to one valve , the rooms (2) will be on the last section before the...


The two zones have seperate supply and returns, correct? If not zoning will not be possible without piping the system in that way. Assuming the piping is correct, for two zones, you will need two zone valves, one cut into each zone. The wiring will vary, but for a 3 wire zone valve, (Taco), power from the transfomer goes through the thermostat, into terminal 1 on the Zone Valve, Terminal 2 on the zone valve goes back to the transformer, (24v common), and also to one "T" terminal on the aquastat (boiler control), and Terminal 3 on the zone valve goes to the other "T" terminal on the aquastat.

For a Honeywell, or other motorized Zone Valve, power again goes from the transformer, through the thermostat and into one side of the motor contacts/wires (depending on brand), the other motor wire goes back to the transformer, (24v common) Then the two end switch contact/wires go back to the T T terminals on the aquastat.

If you are using motorized zone valves, and only 2 of them, the transformer in the aquastat will be strong enough to power them.

Hope this helps

Jul 04, 2009 | Kenmore 75944 Gas Dryer

1 Answer

Zone valve on my Burnham gas furnace keeps running hot continually. How do I manually shut it off? All wires look good and are connected. The other 2 zones work fine.


ASSUMING THAT YOU HAVE HOT WATER SYSTEM,IT IS TIME TO THINK ABOUT REPLACING THE ZONE VALVE.IF YOU DISCONNECT THE ZONE VALVE,THAT AREA WILL NOT GET
ANY HEAT.IF YOU CAN GET THROUGH REST OF THE HEATING SEASON WITHOUT IT,TURN OFF THE POWER TO THE ENTIRE SYSTEM.THEN DISCONNECT THE POWER SUPPLY TO JUST THAT VALVE.BE CAREFUL TO PUT WIRE NUTS ON ANY EXPOSED BARE WIRES.YOU CAN THEN RESTORE POWER TO THE MAIN SYSTEM.

Mar 07, 2009 | Honeywell Programmable Thermostat Heater

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