16
Commissioning 16 litres appliances
Pilot Ignition – 6 720 886 398 (2021/02)
Fig. 14
Inlet measurement test point
6.5
Burner pressure adjustment
▶ Loosen the burner test point captive screw (
Fig. 15,
[D]).
▶ Connect a manometer to the burner pressure measuring
point.
Fig. 15
Burner pressure test point
▶ Turn on gas to the appliance and relight the pilot.
▶ Turn on the water heater with full flow (16l/min).
▶ Using the appliance regulator, adjust the burner pressure
to the burner pressure figure on the data plate (table 10).
▶ Turn off water heater, remove manometer and tighten the
burner test point screw.
6.6
Thermostat calibration
▶ Using a flow cup, adjust the flow rate using the hot tap (or if
using alternate method, use ball valve on outlet) to 6l/min.
▶ Allow unit to run for 1 minute and using a thermometer,
measure the hot water temperature. Required temperature
is 60 °C.
▶ To make adjustments, loosen the locking nut (fig. 16 [C])
and turn the thermostat adjustment nut (fig. 16 [D])
clockwise to decrease temperature, and anticlockwise to
increase, to achieve the required 60 °C.
▶ Reduce the water flow rate to 3l/min, allow the unit to run
for 1 minute, and ensure temperature does not rise above
63 °C. If it does, reduce temperature slightly by the
adjustment nut.
▶ Tighten the locking nut.
The recommended operating temperature is 55 °C.
▶ Open the tap fully, reduce and adjust the flow rate using the
water flow adjustment screw on the base of the water valve
to achieve 55 °C.
1)
▶ Check all gas points with soap solution.
Fig. 16
Thermostat adjustment
6.7
Conversion to a different type of gas
It is not recommended to convert these units to a different type
of gas.
Natural gas LP gas
Max. Burner
Pressure (kPa)
TF400
0.71 kPa
2.4 kPa
Table 10 Burner pressure
D
9708069951
-
9
.
1V
1) 16l/min is based on a 25 °C temperature rise.
Summary of Contents for TF250
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