u Are water flow restrictors compatible with Bosch hot
water systems?
Yes, but they must allow a minimum flow rate of 9 litres
per minute.
u Are Bosch hot water systems compatible with all taps
and shower heads?
They are compatible with most taps but some flick mixer
taps have a flow rate that is below the minimum required
for operation.
u What size of LPG gas cylinder should be used with Bosch
hot water systems?
HydroPower and Pilot range models with a flow rate of 10
and 13 litres should be connected to at least one 45kg
LPG cylinder. HydroPower and Pilot range models with
a flow rate of 16 litres as well as Highflow and 32 Series
hot water systems should be connected with two 45kg
cylinders with an auto changeover regulator.
u How often should the gas appliance be serviced?
All domestic gas appliances should be serviced at intervals
not exceeding 2 years.
Commercial gas hot water applications should be serviced
at intervals never exceeding 1 year.
u Which tempering valve is compatible with which Bosch
hot water system?
All continuous flow units must be connected with a high
performance tempering valve (green cap).
u Can the factory-set maximum temperature of Highflow
(55°C) and 32 Series models (60°C) be changed?
For safety reasons, the maximum temperature is factory-
set at 55°C with the Highflow range and at 60°C with the
Frequently asked questions
(FAQs)
7
32 Series. However, maximum temperatures can be
increased up to 75°C (Highflow range) and 83°C (32 Series),
if necessary. We recommend that the maximum temperature
should only be adjusted by an authorised person. Please
refer to the installation and operation manual.
u What is the maximum number of temperature controllers
that can be used with a Highflow range installation?
4 temperature controllers – 1 main, 1 bathroom and 2
sub-controllers. Premium and Standard main and
bathroom controllers cannot be mixed.
Bosch 32 models (KM3211WHNG/LP) can be used with up
to 3 temperature controllers - 1 main controller and 2
sub-controllers. Bosch 32Q models (KM3211WHQNG/LP)
include 1 main controller as standard.
u Is the setting of gas pressures done by the
manufacturer?
No. Even though all Bosch units are tested in the factory;
Gas inlet pressures and burner pressures (for the
mechanical units) need to be set and checked at every
service to ensure correct operation.
u What does the Bosch warranty cover?
The Bosch warranty covers manufacturing defects only.
If the problem has been caused by poor installation or
other factors, depending on the case, the consumer or
installer is then responsible for the costs.
u Why is the installation position so important?
The positioning of the water heater is very important as it
may affect water flow and lag times. Safety regulations are
another aspect that has to be taken into consideration
when installing the appliance.
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