Parallel Connection Of The Lower And Upper Heat Exchanger; Start-Up Procedure; Commissioning The Dhw Tank; Shutdown - Buderus SM80/5 Instrucciones De Mantenimiento Y De Instalación

▶ Install the Aquastat or DHW temperature sensor in the sensor well
provided for this purpose ( Fig. 2, page 5, [3]).
5.5.2

Parallel connection of the lower and upper heat exchanger

We recommend that the two heat exchangers in the tank each be
connected to its own primary pump.
6

Start-up procedure

NOTICE: Risk of equipment damage from excess
pressure! Excess pressure can cause stress cracking in
the enamel.
▶ Never close the temperature and pressure safety
valve blow-off line.
6.1

Commissioning the DHW tank

Have the installer of the heating system or a qualified contractor
commission the equipment.
▶ Commission the boiler and other accessories in accordance with the
manufacturer's instructions in the corresponding installation and
operating manuals.
Use only drinking water to check the DHW tank for leaks.
On the DHW side, the test pressure must not exceed
150 psi (10.3 bar) gauge pressure.
▶ To bleed air from the DHW tank, open the highest tap/valve.
▶ To fill the DHW tank, open the shut-off valve for the cold water inlet.
▶ Flush the tank and piping thoroughly prior to commissioning.
▶ Before heating up, verify that the boiler, tank and pipework are filled
with water. Open the air bleeder valve for this purpose.
▶ Check all connections, piping and the inspection port for leaks.
7

Shutdown

NOTICE: Risk of tank damage!
Residual moisture can result in corrosion.
▶ Thoroughly dry out the inside (e. g. by means of hot
air) and leave the cleanout cover open.
7.1

Shutting down the tank

WARNING: Risk of scalding from hot water!
▶ Let the tank cool down sufficiently.
▶ Switch off the temperature controller at the control panel, shut of the
heating system emergency shutoff switch, or disengage the heating
system circuit breaker.
▶ Close the cold water inlet shutoff valve.
▶ Drain the DHW tank via the drain valve by opening the highest faucet.
▶ Close the shut-off valves to and from the boiler.
▶ Depressurize the heat exchanger.
▶ Drain and blow out the heat exchanger.
SM80/5, SM100/5 – 6 720 800 156 (2017/07)
▶ To prevent corrosion, dry out the inner space and keep the
inspection port covers open.
7.2 Shutting down the heating system when there is a
risk of frost
▶ Shut down the heating system and the DHW tank as shown in
Chapter 7.1.
Drain the DHW tank completely, even the lower chamber
of the tank and the heat exchanger.
8

Environmental protection/disposal

Environmental protection is one of the fundamental company policies of
the Bosch Group. We regard quality of performance, economy and
environmental protection as equal objectives.
Environmental protection laws and regulations are strictly adhered to.
To protect the environment, we use the best possible technology and
materials taking into account economic points of view.
Packaging
For the packaging, we participate in the country-specific recycling
systems, which guarantee optimal recycling. All packaging materials
used are environmentally-friendly and recyclable.
Old electrical and electronic appliances
Electrical or electronic devices that are no longer
serviceable must be collected separately and sent for
environmentally compatible recycling (in accordance
with the European Waste Electrical and Electronic
Equipment Directive).
To dispose of old electrical or electronic devices, you
should use the return and collection systems put in place
in the country concerned.
9

Maintenance

▶ Allow the DHW tank to cool down sufficiently before performing any
maintenance.
▶ Remedy all faults immediately.
▶ Use original spare parts only!
▶ The tank must be inspected annually and maintained as required.
▶ Check the T&P safety valve annually.
9.1

Preparing the DHW tank for cleaning

WARNING: Risk of scalding!
Hot water can cause scalding.
▶ Prior to cleaning, allow the DHW tank to cool down
sufficiently.
▶ Disconnect electrical power from the heating system.
▶ Drain the DHW tank. To do so, close the shut-off valve for cold water
inlet and the open drain valve. To vent the system, open the air vent
valve or the highest faucet.
▶ Remove the cleanout cover [6] shroud over the inspection port [1] in
the DHW tank.
6
Start-up procedure
15