Step-by-Step Guide: How to Replace Old Radiator Valve with a Thermostatic One

Question

WiTAM I have such a problem. I have to replace the valve like this, the old radiator is just a knob o and Z. and I want to replace it with a thermostatic valve to regulate this heat and please tell me what to do, step by step, it's best to take

sanfran · Answer

Block or single-family house? In general, cleaning the flare fittings from paint, but as I can see, the copper pipes can twist when unscrewing. Besides, draining the water from the installation.

Zbigniew Rusek · Answer

This is obvious, and due to the possibility of twisting these pipes (or weakening the solders), you have to re-solder the copper fittings. To reduce the likelihood of their twisting (unsealing of the solder), it is necessary to hold the valve body with a second key (you need a key 27 and 30 or 2 adjustable wrenches) when unscrewing the screwdriver, and when you unscrew the valve body from the pipe, hold the soldered copper fitting with a second key. so as not to tear it out of the solder when unscrewing it.

sanfran · Answer

Which could be difficult because of the paint.

damian755 · Answer

And it is necessary. Drain the water? Single-family house. Thanks a lot for any Answers and to buy how. It doesn't matter what thermostatic valve?

Zbigniew Rusek · Answer

First of all, the size of the valve must be correct, otherwise there may be big problems with assembly (both the thread diameter and - if possible - adjusting the length to avoid complications). If it's Danfoss, you will probably need the longer nipple version. The (old) valve size will be stamped on the (brass) valve body - generally 1/2 '' and the new one will be the same diameter.

sanfran · Answer

It is imperative to drain the water. Otherwise, your water will run out of the system when you loosen the valve.

damian755 · Answer

Ok today I started the exchange. And everything kind of. Approx. Kind of warm. All. But I guess how I do, for example, the power of the head. For example, from 5 to 3, it probably does not get a cooler radiator: - /

sanfran · Answer

Because it will do when the room heats up. This is how the thermostat works.

damian755 · Answer

I know I understand. But I mean it. She's hot at 5. For example, I would like it to be a little. I set it cooler. On a 4th or 3rd. And there completely. Closing. I have this valve that they are getting cold. Completely. Exactly.

sanfran · Answer

Open the valve to 5. Listen to the noise of the water in the radiator. This can be heard near the valve. When it gets warm enough, gently turn the valve on until the noise stops. And you have the valve preset. Then only slight tweaks. But really light.

REMUR. · Answer

I conclude that you installed a mechanical thermostatic valve, I used to have one too, but after a short time I replaced it with an electronic one. I have the temperature in the room as set on the panel. Sometimes it is possible to replace the heads from mechanical to electronic, if the valve allows it.

sanfran · Answer

Buddy REMUR, just out of curiosity, what batteries are there and how long do they last? I used to think about something like that, but in the end I used a central thermostat to control the boiler.

damian755 · Answer

Yes, I know. That I can regulate. All. I have 5 hot. And when I set it up. At 4 it's already completely slowly getting cold. Do. I bought. It's for PLN 40 with leroy. Invena. Business. Maybe cheap. I am thinking whether or not to replace. For some well-known company. SCHLÖSSER. For example, what do you think. Thank you very much in advance for your answers and best regards

REMUR. · Answer

@sanfran 2 AA sticks enter there, they are enough for 1 year. The advantage is also that I set the opening and closing hours. In my case it closes at 6 p.m. to keep the bedroom cool and opens at 8 a.m.

damian755 · Answer

And what kind of companies do you recommend, up to PLN 60, e.g. PLN 60.70. Because maybe this one is wrong. . .

jas67 · Answer

Thermostatic valves do that. When the temperature in the room reaches the temperature set on the head, the water flow closes and the radiator cools down. When the room temperature drops, the head opens the flow and heats it up. Set the head to 3 and see how warm it will be in the room. Do not look at whether the radiator is heating or not. When it's too cold, turn it up for more and vice versa. Don't keep jumping from one setting to the other because you'll never get it right.

hasfar_antabolis · Answer

Unfortunately, such valves have one disadvantage - I want to ventilate the room, so I turn the valve to zero and open the window, the valve detects low temperature and releases heat (despite the fact that it is set to 0) and thus I have a hot radiator with the window open. .

jas67 · Answer

It blows briefly and intensively, so what's a problem for you, the radiator will heat up for nothing. I am writing because it heats the air flowing into the room.

sanfran · Answer

When the valve is set to 0 it should not let off any heat at all. There is something wrong with your valve.

REMUR. · Answer

Here are the disadvantages of the mechanical head, then I will mention the advantages of my head.
- "windows" function
When a window is opened and the temperature drops quickly, the HR 40 will close the thermostatic valve to prevent energy loss. The display will then show OPEN.
When the temperature starts to rise - after 30 minutes at the latest, the HR 40 will resume normal operation.
- Protection against "blocking"
The thermostatic valve opens and closes automatically every Saturday between 10.00 a.m. to 12.00 p.m., regardless of the current operating mode (Auto or Man).
- Frost protection
If the temperature drops below 6 ° C, the HR 40 opens the thermostatic valve until it rises above 8 ° C. In this way, the HR 40 protects the valve against freezing.

damian755 · Answer

Okay, I already know everything Thank you very much for the answers and best regards

Step-by-Step Guide: How to Replace Old Radiator Valve with a Thermostatic One

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