Honeywell CM51 Straight Swap

The Honeywell CM51, a very good 7-day thermostat, if a little outdated in 2021. There are quite a few decent replacements for this model. However, one that is more recommended than most, is the Honeywell 707. It can handle up to 4 on / off cycles per day, an easy to read LCD display, and has many other features, such as holiday mode, day replicator (copy) auto and manual options. The 707 has become somewhat hard to find for sale in the UK (regularly sold out), but it is available to buy at the following link: Buy the Honeywell CM707.

 

Honeywell CM51 Replacement: The Honeywell CM707

 

Great programmer with excellent reviews from customers. Alternatively you can also replace the CM51 with the Honeywell Home T3C110AEU T3 Wired programmer if you want a more updated model. But out of the two, I would go with the CM707. Although it must be said, it's not the cheapest compatible model to purchase. Came here looking for the CM51 PDF instruction manual? You can read / download that by clicking here.

Honeywell CM51 user guide | Honeywell-CM51-user-guide.pdf | Honeywell CM51 Replacement

Draining Central Heating UK

A fully pumped central heating system can be drained to enable work to be carried out. fitting a temperature radiator valve or swapping a faulty radiator are common instances. Usually, this will be done by a professional, however, it is a job that can be completed by a competent DIYer can perform who has some understanding of heating systems. If not, for any DIY enthusiasts that wants to give it a go and save some money, these days there are many guides online, in video and text format that can help complete these types of jobs without too much difficulty. 

 

 

In most cases a thourough cleaning of the central heating is performed to clean the steel radiators. In advance of doing anything to the actual steel radiator itself you should turn off the central heating boiler and also any gas or electric that feeds the heating boiler. To be sure the system is totally clear you will need to be certain that no water is going into the central heating system.

 

Ball Valves

Your gas central heating system is filled up with water that comes from the tank. A widely used ball valve is put to use in the expansion cistern resembling the one used in many toilet systems.

 

How It Works

Once the water reaches it's highest level the ball floats on the top and closes the valve. As the water level drops, from something like cleaning, the ball falls lower in the tank venting the valve and letting more water to go into the gas central heating system.

 

Precautions

Water should not be permitted to go into the gas heating system if the clearing procedure is to finish fully. To stop any further water going in the the valve needs to be disabled / turned off.

 

Drain It Out

As soon as you have completed the above set up a pipeline from an outside empty to the outlet that is situated at the lower end of one of your steel radiators. The water from your heating radiator will stream through the pipeline and out of your steel radiator. 

 

No Water

Of course, if you want to empty the complete gas heating system you will need to attach the hose to one of the level metal radiators. You now need to be thorough and make double sure that all the water has been drained out and that practically zero water is getting into the system before any other servicing is taken out on the gas heating system.

If you need to complete this procedure quickly you can also open the bleed valves on the heating radiators on the higher floors of a residence. When the water is drained out you are free to repeat the exercise on the rest of your steel radiators.

Honeywell CM67NG Replacement Thermostat

Honeywell CM67NG Replacement. The Honeywell CM67NG is a great old school 7-Day programmable digital thermostat that can be picked up really cheap these days on websites like eBay UK. It has lots of features, like auto, manual, copy etc. It even has the function to be able to offer up 6, yes six on / off cycles each day. But if you're here looking for a replacement for this model, you more than likely know what this programmer is capable of and just want to know what the best replacement is for the Honeywell CM67NG.

Widely Available Replacement: The Honeywell CM707

 

The best replacement for this model is the Honeywell CM927. This model has become rather difficult to find for sale online, unless buying in used condition. If that is the case, and you can't buy a 927, you can also swap the Chronotherm CM67NG with the Honeywell CM707 without much hassle. They generally have the same wiring setup. You can also replace the Honeywell CM51 with the CM 707. 

Looking for the Honeywell Chronotherm CM67 manual / installation / wiring diagram? You can read / download the PDF here.

Honeywell cm67 user guide | Honeywell chronotherm cm67 manual | Honeywell cm67 replacement

Honeywell ATF600 + ATF800 Mount

Wall mount pack: Honeywell Home Evohome ATF600 and ATF800. Suitable for 3rd generation of the Evohome Controllers. Product specifically states the ATC928G3000. Comes with power supply and is fairly easy to fit. The design is very simple and straight forward. Just screw it to the wall and you're good to go.

 

 

Be careful though when mounting / fitting, as some buyers have said the back plate is quite fragile and not the best quality. But once fitted it does not have to be messed around with anymore so should sit trouble free for years to come. It should really have been made thicker to begin with in all honesty.

Older Gas Boilers Burn More Gas

Older Gas Boilers Burn More Gas. Central heating is run of the mill in many houses and flats in England. Whilst most are chugging along just fine their energy cost-efficiency could be a lot better with a few minimal tweaks to the homes heating system controls. The addition of an easy to use timer or a more advanced heating system programmer will allow you to automatically control when the heating and the hot water are running. If you're not familiar with using a programmer don't worry, they are easy to get the hang of. Fine tuning the schedules when gas is actively being used will help in saving you money on energy bills.

Adding room thermostats will help you to preserve the temperature in the dwelling without using more energy to make it warmer than needed. Once the desired temperature is achieved the heating system is automatically switched off, economizing energy usage. TRV valves can be fitted to individual radiators to calibrate individual room temperatures. This is beneficial in helping keep certain rooms lower in temperature than other rooms within the dwelling.

One of the main reasons of expensive gas bills, and a big culprit behind energy inefficiency can stem from the age of your gas boiler. The average life-span of a central heating boiler is approximately 10 -15 years. The excellent energy efficiency ratings of newer gas boilers shows just how much better they are than older ones. 

They are much more economical. Condensing central heating boilers can use from between 15% - 45% less gas. They are clever in the fact that they pull out heat from the exhaust system gases and actually make use of it to heat the water in your home.

Boiler-m8 [RS25-6JG] Universal Replacement For Grundfos UPS 15-50 15-60

The Boiler-m8 RS25-6JG Universal Circulator Pump Head is a cost effective, direct replacement for the Grundfos UPS 15-50 / 15-60. It has a triple speed function, offering 3 m - 5 m and 6 m. Swapping of the old unit is very straightforward. If you're unsure on how to fit the new unit call out a professional. If you are DIY savvy and want to replace it yourself, there are plenty of videos of YouTube that show a detailed step-by-step process of how to complete a quick and easy swap (it's not hard). See the following post which features the Grundfos 59525600 and has a video that shows how to replace a Grundfos Central Heating Pump 15/50 15/60.

No: 19080271. The Boiler-m8 RS25-6JG (6 meter head) has an IP44 rating, which means it is fairly well protected against damp and wet conditions. It also comes with a 2-year Guarantee. Boiler-m8 do make excellent Grundfos replacement parts, so the saving made when compared to buying an original Grundfos replacement pump head is considerable.

Drayton LP241 24 Hour Programmer

Drayton LP241 (MK4) is a great 24 hour 2- channel programmer from a brand with very good reputation. It works well as a replacement for many models, including Randall 3060, Honeywell UT1L, Drayton Tempus Three, Drayton SM2, ACL Lifestyle LS241, earlier models of LP241 and many more. Looking for information on how to program the LP241 - See the video below. The model in the video may be different but the units are all very similar to program.

Find the Drayton LP241 24 Hour Programmer for sale here

Very versatile and will work with many boilers, including  Worcester, Bosch, Grant, Vaillant etc. Reliable and easy to use, the LP241 can be programmed to accommodate up to 3 time changes / cycles per 24 hours. The boost mode is variable, offering from 1 to 3 hours. This model also has built-in auto season time adjustment. If you need a 7-day programmer, the Drayton LP722 is a good model to buy.

The Drayton LP241 isn't the cheapest out of the many Drayton models, but it is money well spent due to its ease of use, reliability and versatility to work as a direct replacement for lots of older models from Drayton, and many from different brands. Reviews are excellent too. I actually have a LP241 model Drayton myself, and it's still going strong after easily a decade of daily use. The buttons have faded slightly but never had a problem with it. Great programmer, very reliable.