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2
Technical Characteristics and Dimensions
2.1
General Description
The appliance has been AS/NZS 5263.1.2 tested.
Models
TF250/400
Category
CONTINUOUS FLOW
Type
GAS - EXTERNAL INSTALLATION
Table 2
2.2
Explanation of Model Code
TF (Top Flue)
TF (Top Flue)
Table 3
2.3
Package contents
•
Gas hot water unit
•
Documentation
2.4
Description of the Hot Water Unit
•
Hot Water Unit for external wall-mounting only
•
Available in Natural gas or LP gas
•
Safety devices:
– Thermocouple to check for accidental extinction of the
pilot flame
– Overtemperature switch to prevent overheating.
•
Water filter on the inlet water supply
Economical
Only heating water when required, the Bosch range is
extremely economical to run.
Versatile
LPG models are particularly popular in country areas, where
Natural Gas is not available.
Low Temperature Areas
In areas where the atmospheric temperature may drop to 0 °C
for brief periods, the installation of an EXOGEL valve (part
number H707 060 151) will minimise the possibility of
damage to the appliance if the water freezes.
NOTICE:
This water heater MUST NOT be installed in
areas where the temperature remains below
0 °C for extended periods.
Pilot Ignition – 6 720 886 398 (2021/02)
250 (10 litres/min @ 25 °C Rise)
400 (16 litres/min @ 25 °C Rise)
Technical Characteristics and Dimensions
Fig. 1
EXOGEL valve
[1] Hot water
[2] Cold water
[3] EXOGEL valve
Low Flow Rates
This gas water heater is designed to operate at a minimum flow
rate between 3.2 to 4.0 litres per minute. Sufficient flow must
be provided to ensure the correct operation of the appliance.
There are various causes of a low flow rate including, but not
limited to:
•
Low flow tapware
•
Flow restrictors/aerators
•
Hand held showers
•
Poor inlet pressure to property
•
Restrictive pipework and/or fittings
Water fixtures and appliance settings must ensure that the flow
rate of hot water does not fall below the minimum requirement.
Failure of the unit to operate correctly due to poor flow rate will
not be covered by warranty.
5
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