Cleaning The Evaporator; Draining The Tank; Descaling - STIEBEL ELTRON ACCELERA 300 Operating And Installation

INSTALLATION
MAINTENANCE AND CLEANING

16.1 Cleaning the evaporator

WARNING Injury
The evaporator has many sharp-edged fins. When
cleaning the evaporator, proceed with caution and
wear protective clothing, in particular safety gloves.
Maintaining the full output of the water heater at all times requires
an occasional professional cleaning of the evaporator.
» Undo the screws that connect the water heater cover and
remove.
» Carefully clean the evaporator fins. Only use water and a soft
brush. Never use acidic or alkaline cleaning agents.

16.2 Draining the tank

WARNING Scalding
Hot water can be expelled when draining the tank.
» Close the shut-off valve in the cold water line.
» Fully open the hot faucets at all points.
The tank is drained via the cold water supply. Some residual water
will remain in the bottom of the tank.
» Open the drain valve (see chapter 10.7, "Water connection").
If a drain valve was not installed, undo the fitting on the cold water
supply of the water heater.
16.3 Sacrificial anode rod
A sacrificial anode rod is inserted in the top of the water heater.
The sacrificial anode rod fitted at the factory is approx. 1260 mm
(50") long.
The timing of the anode inspection is subject to the local water
quality and is determined by your local licensed installer. We
24 | ACCELERA® 300 HEAT PUMP WATER HEATER
recommend that the anode is checked no later than 12 months
after initial start-up.
1
1 Sacrificial anode rod
If the anode is used up, you will need to replace it. Should it prove
impossible to install an anode rod (length approx. 1260 mm (50")),
install a segmented anode.
Description
Anode rod
Segmented anode rod
During the anode rod installation ensure a clean metal-conducting
connection between the anode and the tank.

16.4 Descaling

» Close the shut-off valve in the cold water supply to the tank.
» Draw water from the tank to relieve the pressure inside the
water heater.
1
2
1 Low pressure fill port
2 High pressure fill port
3 Booster heater flange
» Unscrew the booster heater flange and remove element.
Part #
278235
143498
3
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