Vacation And Extended Shutdown; Clearing The Condensation Drain Tubes; Refrigerant Circuit; Anode Rod Servicing - Bosch Compress 3000 DW FO Installation Instructions Manual

36 | Maintenance and repair
Large volumes of water will drain from the
cold water inlet (>270 liters).
▶ Ensure proper drainage of water.
▶ Close cold water supply.
▶ Open a hot water tap (preferable one install at the same
level as the appliance) to relieve pressure and wait until
flow substantially decreases.
▶ After ensuring a proper drainage solution, remove cold
water inlet connection and wait until water is drained.
6.5

Vacation and Extended Shutdown

If the water heater is to remain idle for an extended period of
time, the power and water to the appliance should be turned off
to conserve energy and prevent the buildup of dangerous
hydrogen gas.
The water heater and piping should be drained if they might be
subjected to freezing temperatures. After a long shutdown
period, the water heater's operation and controls should be
checked by qualified service personnel. Make certain the water
heater is completely filled again before placing it in operation.
Note: refer to the Hydrogen Gas Caution in
the Operating Instructions.
6.6

Clearing the Condensation Drain Tubes

The condensate drain is located on the back of the water
heater. If blocked, water will spill down the outside of the unit.
▶ Remove the condensate drain pipe.
▶ Clear any debris and reattach.
▶ Periodically inspect the drain line and clear any debris that
may have collected in the line.
▶ See Installation Instructions for more information.
6.7

Refrigerant circuit

NOTICE: Refrigerant leak!
▶ Repairs to the refrigerant circuit (e.g. to
the compressor, condenser,
evaporator, expansion vessel) may only
be carried out by an authorised
contractor.
6.8

Anode Rod servicing

A water heater anode rod is the most important safeguard any
storage tank has against corrosion and premature failure.
6 720 801 244 (2013/08)
Inspecting the anode rod is therefore very important.
Sacrificial anodes are designed to deteriorate overtime. Most
water heating industry professionals recommend inspecting
the anode yearly.
Homes with salty or softened water supplies should consider
more frequent inspection. When in doubt consult a local water
heating professional.
▶ Arrange for an authorised person to inspect the anode and
replace if required.
6.9

Checking/replacing the magnesium anode

The appliance is protected against corrosion
by an internal magnesium anode.
WARNING: Damage to the appliance!
The magnesium anode must be installed
before commissioning the appliance.
WARNING: Damage to the appliance!
Appliances operated without this protection
are excluded from our warranty.
▶ Check the magnesium anode yearly and
replace if required.
The internal wall of the DHW storage tank is coated with a
double glass lining. The coating is designed for normal quality
water (section 4.8.1, page 21). When using more corrosive
water, the warranty only applies if additional safety measures
(i.e. dielectric joints) have been taken, and the magnesium
anode is checked more frequently.
To check the protective anode:
▶ Isolate the appliance from the power supply.
▶ Isolate appliance from water supply.
▶ Open a hot water tap (preferable one install at the same
level as the appliance) to relieve pressure and wait until
flow substantially decreases.
▶ Remove the anode rod protective cap.
Compress 3000 DW FO