Commissioning 10 Litres Appliances; Before Starting Up The Heater; Remove The; Inlet Pressure Adjustment - Bosch Pilot Ignition TF250 Series Installation Manual And Operating Instructions

5

Commissioning 10 litres appliances

Commissioning MUST be carried out upon
installation.
5.1

Before starting up the heater

CAUTION:
▶ Initial startup must be performed by an
authorised gas fitter who will provide the
customer with all the necessary
information for optimum operation of
the gas heater.
5.2 Remove the front cover
▶ Loosen the two knurled screws located on the rear side of
the front panel.
Fig. 8 Front cover removal
5.3

Inlet pressure adjustment

DANGER:
The following procedures must only be
performed by a qualified technician.
Gas pressure adjustment (commissioning) MUST be carried
out upon installation.
▶ Check the gas indicated on the data plate and label on the
front flue panel is the same as to which the gas is
connected.
Pilot Ignition – 6 720 886 398 (2021/02)
▶ Turn off the gas to the appliance, remove the sealing screw
of the pressure test point on the right hand side of the gas
valve (Fig. 9, [A]) and attach a
▶ Turn on gas and light the pilot.
Static Pressures should be greater than or equal to the figures
in table 7.
▶ Adjust the appliance regulator to achieve the figures in
table 7 with the unit operating and several hot water taps
open for full water flow through the unit.
If the operating inlet pressure cannot be achieved there may be
an issue with the gas supply meter (NG), cylinder regulator
(LPG), or pipe sizing (Ref AS/NZS5601). This must be resolved
before proceeding.
▶ Remove manometer and tighten test point screw.
Measurements should be made with unit
operating with several hot water taps
opened to achieve maximum water flow
through the unit.
If possible all other gas appliances (ducted
heating etc.) should be operating at the same
time.
Inlet Pressure
TF250
(kPa)
Table 7 Inlet pressure
Fig. 9 Inlet measurement test point
5.4

Burner pressure adjustment

▶ Loosen the burner test point captive screw ( Fig. 10
[D]).
▶ Connect a manometer to the burner pressure measuring
point.
Commissioning 10 litres appliances
manometer.
Natural gas LP gas
1.13 kPa 2.6 kPa
13