Water Connections; Water Quality - Bosch TRONIC 3000 US3-2R Installation Manual And Operating Instructions

Installation
▶ Install the heater outside the protection areas and keep a
minimum distance of 24" (60cm) from the bathtub.
Fig. 4 Protection areas for bathtub or shower stall
DANGER:
Risk of electric shock!
▶ Ensure that the appliance is disconnected from power and
all circuits breakers are off before performing any work.
4.1.1 Freeze prevention
If the heater must be left in a space that is subject to freezing
temperatures, all water must be drained from the heater.
Freezing damage is not covered under the warranty.
NOTICE:
Appliance damage!
▶ Use of agents like anti-freeze are not allowed as they may
cause damage to the water heater's internal components.
Draining the heater
Follow the procedure below to best minimize the chance of
freeze damage:
▶ Disconnect electric supply.
▶ Disconnect cold and hot water pipes from fittings on
bottom of heater. Allow water to drain out.
▶ After allowing all water to drain out, the heater should be
blown out with low pressure compressed air to remove as
much water as possible.
8
4.2

Water connections

▶ The unit should be connected directly to the main cold
water supply and not to pre-heated water. The unit should
be installed with service valves on both the inlet and outlet.
These valves can be used to turn off the water supply to the
unit if it needs servicing, or to reduce the water flow if it is
too high.
▶ We recommend that you use ½" copper or high pressure
flex connections rated to a minimum of 150 psi.
▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe
dope.
▶ The inlet and outlet are clearly marked on the unit. They
each is a male ½" NPT fitting.
▶ If the unit is to supply a sink, we recommend that you use
aerators.
▶ If the unit is to supply more than one sink, the aerator
6721803545-23.1V
should be the same at each tap if they are to be used at the
same time.
▶ Before the unit is connected to the water supply flush the
pipes to remove, flush the incoming pipework with water to
remove any debris or loose particles. Failure to do so may
make the unit inoperable.
4.3

Water quality

Water quality will have an impact on appliance longevity.
If water quality exceeds one or more of the values specified on
table 5, water softening/conditioning is required.
Description
pH
TDS (Total Dissolved
Solids)
Total hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc
Table 5 Maximum acceptable water quality parameters
Max. Levels
pH
mg/l or ppm
mg/l or ppm
mg/l or ppm
mg/l or ppm
mg/l or ppm
mg/l or ppm
mg/l or ppm
mg/l or ppm
Tronic 3000 – 6 721 803 545 (2020/02)
6.5 - 8.5
500
100
(6 grains)
2.0
250
1.0
0.3
0.05
5.0