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Maintenance And Repair; Periodic Inspection; Temperature And Pressure Relief Valve; Flushing Tank - Bosch Compress 3000 Instruction Manual

Bosch electric heat pump water heater
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5

Maintenance and repair

Warning: Internal components of the
heater can become extremely hot
during operation. Use caution when
servicing and removing the front and
rear covers.
Warning: Before manually operating
the relief valve, make certain no one will
be exposed to the danger of coming in
contact with the hot water released by
the valve. The water may be hot enough
to create a scald hazard. The water
should be released into a suitable drain
to prevent injury or property damage.
If the temperature and pressure-relief
i
valve on the hot water heater discharges
periodically, this may be due to thermal ex-
pansion in a closed water system. Contact
the water supplier or your plumbing con-
tractor on how to correct this. Do not plug
the relief valve outlet.
NOTE: If the power for the water heater is
i
turned off and then back on, the compres-
sor will not start for 3 minutes to avoid in-
ternal damage..
Properly maintained, your water heater will provide
years of dependable trouble-free, economic service.
It is suggested that a routine preventive maintenance
program be established and followed by the user
5.1

Periodic Inspection

It is further recommended that a periodic inspection of
the operating controls, heating elements and wiring
should be made by service personnel qualified in elec-
tric appliance repair.
Most electrical appliances, even when new, make some
sound when in operation. If the hissing or singing sound
level increases excessively, the electric heating element
may require cleaning. Contact a qualified installer or
plumber inspection.
6 720 646 804
5.2
Temperature and pressure relief
valve
Danger: Before manually operating
the relief valve, make certain no one will
be exposed to the hot water released by
the valve. The water drained from the
tank may be hot enough to present a
scald hazard and should be directed to
a suitable drain to prevent injury or
damage.
Warning: If a relief valve discharges
water periodically, this may be due to
thermal expansion in a closed water
supply system. Contact your installer or
service provider for assistance. Do not
plug the relief valve.
At least once a year.
B lift and release the lever handle on the temperature
and pressure-relief valve, located on the back-right
side of the water heater to make certain the valve
operates freely.
Allow several gallons to flush through the discharge line
to an open drain.
5.3

Flushing tank

A water heater's tank can act as a settling basin for sol-
ids suspended in the water. It is therefore not uncom-
mon for hard water deposits to accumulate in the
bottom of the tank.
To clean the tank of these deposits:
B Open the drain valve located near the bottom of the
unit and drain a few quarts of water from the water
heater once a year.
5.4

Draining the Water Heater

Caution: Shut off power to the water
heater before draining water.
Danger: The water drained from the
tank may be hot enough to present a
scald hazard and should be directed to
a suitable drain to prevent injury or
damage.
B Attach a garden hose to the drain valve located at the
bottom of the unit and direct that hose to a drain.
Maintenance and repair
23

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