Commissioning 16 Litres Appliances; Before Starting Up The Heater; Remove The; Water Flow Adjustment - Bosch Pilot Ignition TF250 Series Installation Manual And Operating Instructions

6

Commissioning 16 litres appliances

Commissioning MUST be carried out upon
installation.
6.1

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.
6.2 Remove the front cover
▶ Loosen the two knurled screws located on the rear side of
the front panel.
Fig. 12 Front cover removal
6.3

Water flow adjustment

▶ Open a hot tap fully that can provide at least 16L/min.
-or-
▶ Disconnect outlet and attach a ball valve and pipe to
regulate and allow full flow.
▶ Adjust the slotted screw on the base of the water valve
(Fig. 13, [A] to set the flow rate to 16L/min.
1) Alternate method hint.
Pilot Ignition – 6 720 886 398 (2021/02)
1)
▶ Turn screw clockwise to reduce pressure, anticlockwise to
increase.
Fig. 13 Water flow adjustment screw
6.4

Inlet operating pressure adjustment

▶ 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.
▶ 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. 14, [B]) and attach a
▶ Turn on gas and light the pilot.
Static Pressures should be greater than or equal to the figures
in table 9.
▶ 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 refit sealing screw.
Measurements should be taken with unit
operating and 16l/min running through the
unit.
If possible all other gas appliances (ducted
heating etc.) should be operating at the same
time.
Inlet Pressure
TF400
(kPa)
Table 9 Inlet pressure
Commissioning 16 litres appliances
manometer.
Natural gas LP gas
1.13 kPa 2.6 kPa
15