The resistance is in immersion in the water heater, you have to drain it. We advise you to replace the resistance’s gasket and the pressure relief valve on the same times. Don’t forget to replace the anode if it is included with the resistance.
To replace it, you need :
A screwdriver
A pliers crescent wrench
A seal 20/27
A PTFE tape
A basin
A wipe
A glove
A garden hose with its female connection plug 20/27
Steps to be followed :
One day before your intervention, cut off the water heater power supply before taking a shower. You will completely drain the hot water to avoid any risk of burning during your intervention.
Shut down the water valve then open your hot faucet to break the pressure into the water heater. The water must stop running. If not, your valve is not waterproof and you need to replace it
Turn on the pressure relief valve and let it open
Remove the pressure relief valve nut and unscrew it 2 turns
You have 2 solutions:
The first one, the most advised, is to let the water heater drain out before unscrewing the pressure relief valve: it may takes several hours li>
For the second solution, take an additional basin
Unscrew slowly the pressure relief valve until the flow stops. When you remove the pressure relief valve some water may run intermittently
Screw the coupling and the garden hose you unrolled to an evacuation
Open the protective cover and disconnect electrically the thermostat and the wires. Remove the resistance’s gasket. Clean the vessel bottom inside to timescale deposits.
Unscrew the anode and replace it.
Install at the same time: the resistance, the anode and the new gasket. Tighten the parts cross-Wise"
Remove the old PTFE tape
Install the new PTFE tape clockwise. Your seal has to be thick to be waterproof
Screw the pressure relief valve as the former one
Install the new gasket and tighten the nut
Wipe the pressure relief valve before turning on the water to check if there’s any sign of leaks
Turn off the hot water faucets
Open the valve slowly and check if there’s any leak again. If there’s any sign of leaks, you can totally turn on the valve
To displace the air present inside the water heater, turn on the faucet intermittently .
Check constantly if if there’s any when your water heater is filling
When the air is displaced, turn off the faucets and check again if there is any sign of leak .
Install and connect electrically the thermostat
Close the protective cover
Don’t forget to turn on the water heater power supply and put your DSC relay in “Force Armed” to get hot water. The DSC relay will switch automatically on the next use.
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