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Make : Weil-McLain Model : CG-5-SPDN Series 12 I have the above mentioned boiler which is located on the 1st level of a three story one family house, the area where the boiler is located is insulated.

Make : Weil-McLain Model : CG-5-SPDN Series 12 I have the above mentioned boiler which is located on the 1st level of a three story one family house, the area where the boiler is located is insulated. my problem is the very top floor is always chilly and the heating pipes are not as hot as the lower levels. The temperature tops off at 180 degrees with a psi of 25 when it is on. Is that adequate for the limits to heat up to the third floor. any suggestions

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You don't have an optimum distribution of steam in your house. Try closing a little bit the valves supplying the heaters in the lower floors. Close a little bit more until you get the desired balance.

Posted on Nov 06, 2012

  • margaret Nov 11, 2012

    Thanks for your response. My system uses hot water and baseboard heaters there isnt any way to turn off a specific area. I already tried bleeding the system for air and i believe i got it all

  • Boyet Soriano
    Boyet Soriano Nov 12, 2012

    In a multi load system (system with many heaters), supply lines to each load should have a modulating valve so that it balances the distribution to the entire network. The modulating valve will regulate the flow of hot water to the coil to satisfy the set temperature in your thermostat. If your system is not equipped with this valve, then you must have it. If the system altready have this, check if the lower heater modulating valves are stuck open. Indication is that it overshoots the set thermostat temperature.

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You have a hot water system If it is a properly installed 2 pipe system. try these tips. first make sure your pipes in the furnace room and any areas of the house not used as a living area are well insulated. every pipe is a radiator.. get the heat to where you want it by insulating those areas you do not need to heat. Then balance the system by making sure the valves on the radiators in the cool rooms are fully open. and then turn the ones in the warmer rooms down a 1/2 turn. if that helps but does not solve the problem turn the warmest rooms down a little more till all rooms are about the same temp. this is balencing the system

Posted on Nov 17, 2014

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Posted on Jan 02, 2017

  • 124 Answers

SOURCE: Domestic oil fired central heating.

many times the feeder tube from the bottom of the tank becomes perforated. the return tube is ok most of the time . try switching the 3 8 tubes from inlet to outlet and see if problem resolved. if so the the tube down into the tank is flawed.

Posted on Nov 01, 2008

  • 15 Answers

SOURCE: have an oil fired boiler

These boilers usually have multiple controls. The control that would take it out of the circuit at 210 degrees is a safety.

You should definitely have a professional take a look at this unit before you continue using it.

Posted on Sep 18, 2008

  • 108 Answers

SOURCE: I have a weil-mclain CGA-4-SPDN

You need to replace the Thermocouple. (pilot safety device) It would be best to call a Technician about this.

Posted on Oct 22, 2008

  • 306 Answers

SOURCE: Not enough air flow coming from the vents on the second floor.

If you feel like increasing your blower motor speed you can do this. Go to the air handler take the cover off to expose the blower motor. You will see a circuit board that has the blower motor wires going to it. Using your flash light look at the board and locate the terminals that read Cool Heat Park ... Now the Cool terminal should have black colored wire going to that one. Now locate the Heat terminal if it has red going to it and maybe blue sitting on the park terminal then swap the two around, blue is like med speed on the blower. Where Red is low speed. This will increase the blower about 50 rpms. You can even read your blower motor and get the speeds more detailed. You have a big house your unit is I bet a 4 ton A/C and 125,000 btu furnace. Probably has 1600 rpm motor. This is one solution. You have a up flow model and when you open the furnace cabinet up you will be able to see the specs. on the furnace. Let me know how that goes ken here in Kansas

Posted on Jan 13, 2009

  • 340 Answers

SOURCE: Have Rheem 5 ton heat pump with stacked coils poor cool.

If your sure on the psi your low on freon or your evaporator is restricted discharge psi would realy help.you will get best performance with a clean unit or pay expensive utility bill . Tom

Posted on Jun 18, 2009

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2 Answers

I have a mclain 68 boiler... I have no power going from boiler to thermostat. what can that be?


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Oct 23, 2016 | Heating & Cooling

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The heating system should have an automatic fill valve that limits water pressure to 12 PSI or so. Filling with water at either full street or well pump pressure can cause the relief valve to open. Many times after opening, the relief valve will not re-seat properly resulting in a steady drip. You may need to replace the valve if it will not stop leaking.

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Good luck!

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1 Answer

Light the pilot light on weil mclain gas boiler


Joanne If there is a standing pilot on the boiler. Put the gas valve to the pilot setting and push in on the valve while holding a long match or BBQ lighter @ the pilot assembly that is behind the small access port at the top of the gas train assembly. Dont hold the pilot knob doun without having a flane @ the gas outlet of the pilot assembly or gas will build up and could blow out of the port and hold the gas valve in for about a minute or two and let it go it should stay light when you let it go .If it does not sta lit and it IS a standing pilot there- is a thermo-coupling that may be bad If the pilot does not stay lit.
If there is an electronic ignition rather than a standing pilot then you do not need to light it will light itself if the electronic ignition is bad or if the flame sensor is dirty. If you remove the pilot assembly from the gas train and clean the flame sensor rod with a piece of .0000 steel wool it could help. If not you may want to call a licensed pipe-pitter ( OR plumber depending where you live and the local codes).
If you don't thing you could do it yourself then call a licensed pipi-fitter or plumber. (Gas only has to leak once for there to be a problem so please do call someone licensed if you don't think you could do it your self.), http://www.weil-mclain.com/en/weil-mclain/products-services/
Here is a link to the manufacturer you should be ale to fing your equipment and the install instructions, if you look around .You can download a PDF and print it
Good luck and stay warm

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When is the last time you had it serviced By a Tech?

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Water leaking inside boiler keeps putting out the pilot light


Most likely cracked core.Has low water cut off alarm and auto make up feed been on?Have you been manually adding water?

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1 Answer

Have a water leak inside boiler keeps putting pilot light out


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Feb 18, 2013 | Weil-McLain CGa-25-SPDN, NG, Gas Fired...

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