Installing an electric water heater is easy and anyone can do it without having to call in a professional.
This installation is done in 4 distinct stages:
- Determine the location where the water heater will be installed
- Fix the device (if applicable) to the wall
- Connect the device to the hydraulic network
- Connect the device to the electrical network
The location of the electric water heater
This location should be chosen according to common-sense rules:
- Be as close as possible to the tapping points. Do not forget that each time you draw hot water, it is all the pipes between the electric water heater and the tap that must fill with hot water. And this with 2 consequences:
- Increased electricity consumption because you will partially empty your water heater with hot water that you will not use
- A heat loss (especially if your pipes are not properly insulated) because the water will cool down as it travels through the pipes.
- It is generally considered that 8 meters are the maximum distance beyond which the installation of a local backup water heater is justified.
Remember to protect it from frost. If the installation is done in the house, normally the problem does not exist, on the other hand in the case of installation in a cellar or a garage, it is necessary to make sure that the pipes are insulated at the thermal level.
Attaching the electric water heater
Depending on the type of water heater chosen, it must be fixed securely to the wall. Manufacturers usually provide a template to allow you to easily position the drilling locations. Attention, a vertical water heater, once full will weigh from 75 to 250 kg approximately (weight of the device + volume from 50 to 200 liters). It is, therefore, necessary to ensure that the fixation is sufficient. If you are not on a load-bearing wall, it is compulsory to think of adding a tripod to relieve the fixings.
The hydraulic connection of the water heater
The first 2 stages of the installation water heater consist of cutting the electric current and cutting off the water supply.
Color codes tell you about the types of inputs/outputs. In blue, you have the cold water inlet and in red the hot water outlet.
For the cold water supply:
- Place 2 turns of Teflon tape (always in the direction of screwing) and screw the security group.
- Install the siphon.
- Connect the cold water supply hose to the safety group.
- Note: If the installation pressure is> 5bars, it is advisable to install a pressure reducer to prevent water from continuously flowing from the safety group.
For the hot water outlet:
- Attach the dielectric fitting
- Connect the outlet hose
Then fill the tank (remember to open the water inlet valve) leaving a tap open to allow the air in the tank to escape.
Close the tap when the water starts to flow continuously.
Check that all the connections are tight even if you want to tighten them slightly.
Once the water heater is pressurized, activate the safety group to ensure its proper functioning and evacuate any deposits.
The electrical connection of the water heater
First of all, make sure that the power supply is closed.
Depending on the installation and the water heater chosen, you have 2 possibilities, either a single-phase connection or a three-phase connection. The manufacturers must give you the connection diagrams in the 2 cases (when possible). You just have to respect the color codes and connect each wire to the terminal indicated.
After replacing the safety cover, you can turn on the power.
After a few minutes, a few drops of water will flow from the safety group. This is normal operation due to the pressure rise in the water heater. This validates the fact that your safety group is operational and that it limits the pressure inside the tank.
Here is your water heater is now installed. You just have to wait a few hours for the resistance to heat the water in the tank.
Be careful during the first use, the water can be extremely hot. If this is the case, your water heater has a refill which will allow you to adjust the temperature (some water heaters have a digital setting allowing you to choose the temperature, others have a manual adjustment button).