Moisture In Cooling Mode; Checking The Safety Valves; Heat Pump (Outdoor Unit); Removing Dirt And Leaves - Bosch Compress 3400iAWS E Operation Manual

Maintenance
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Fig. 6 Cleaning the strainer
4.1.4

Moisture in cooling mode

NOTICE
If moisture frequently forms near the indoor unit or the fan convectors in
cooling mode, this could mean that the condensation insulation is
defective.
▶ If moisture forms in the vicinity of components of the heating system,
switch the heat pump off and consult the system installer.
4.1.5

Checking the safety valves

The safety valves should be checked 1-2 times each a year.
Water is expelled from the safety valve during heat-up. Never close the
safety valve.
▶ The safety valve should only let water out if the maximum pressure is
exceeded. Contact the installer if water is coming from the safety
valve at pressures below 2 bar.
▶ The drainage hose from the safety valve shall be discharged into the
drainage.
4.2

Heat pump (outdoor unit)

The following inspection and maintenance steps are carried out several
times per year in order that the heat pump's maximum output will be
maintained:

▶ Removing dirt and leaves

▶ Casing

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0010033735-001

▶ Evaporator

▶ Snow and ice

DANGER
Risk of electric shock.
▶ Always de-energize the electrical connection before carrying out
maintenance work on the device (fuse, circuit breaker).
Damage to system due to use of unsuitable cleaning agents!
▶ Do not use acidic or alkaline cleaning agents or cleaning agents
containing chlorine or abrasive products.
▶ Do not use strong alkaline cleaning agents, e.g. sodium hydroxide.
4.2.1 Removing dirt and leaves
▶ Remove dirt and leaves with a brush.
4.2.2 Casing
Dust and other dirt particles concentrate in the heat pump's outdoor unit
over time.
▶ If required, clean the outside with a damp cloth.
▶ Spot repair cracks and damage on the casing with anti-corrosive
paint.
▶ Standard car wax can be applied to protect the paint.
4.2.3 Evaporator
Wash off any layers of e.g. dust or dirt deposited on the surface of the
evaporator.
WARNING
The thin aluminium fins are sensitive and can be damaged easily through
incorrect handling. Never dry the fins directly with a cloth.
▶ Wear protective gloves during cleaning to protect your hands from
cuts.
▶ Never use high water pressure.
Cleaning the evaporator:
▶ Spray detergent on the evaporator fins on the back of the heat pump.
▶ Rinse all coatings and cleaning agents off completely with water.
4.2.4 Snow and ice
In certain geographical regions or during periods of heavy snow, snow
can get stuck on the back and the top of the heat pump. To prevent
subsequent formation of ice, remove the snow.
▶ Clear the snow off the top.
▶ Hot water can be used to rinse off the ice.
Moisture can form under the CS3400iAWS outdoor unit due to
condensate not falling into the condensation catch pan. This is normal
and no special action is required.
4.3

Tightness test

Under the current EU Directives (F-Gas Regulation, EC Regulation No.
517/2014, which entered into force on 1 January 2015), operators of
equipment containing fluorinated greenhouse gases in an amount of five
tonnes or more of CO 2 equivalent that are not part of foams must ensure
that the equipment is checked for leaks.
The tightness test must be carried out during installation and then every
12 months.
▶ Consult an installer.
Compress 3400iAWS E – 6721852787 (2023/01)