Operating instructions

Switching on
1) Check that the gas service tap is opened at the gasmeter
and main power is on.
2) Check that pressure in central heating system is above 0.7
bar and below 2.5 bar with the pressure gauge 0 (43 fig.
23).
3) Open the gas tap (21 fig. 23) by turning from right to left.
4) The boiler is now ready to use.
Hot Water
1) Turn selector switch (34 fig. 22) to position fi . The green
“power on” indicator 0 will light.
2) Turn on a hot water tap, the orange “burner on” indicator &
will light and the water will become hot.
Heating and Hot Water
1) Turn selector switch (34 fig. 22) to position fl ‘1111. The
green “power on” indicator 0 will light.
3) If the room thermostat (if fitted), the heating control ‘III1
and the clock (if fitted) are all calling for heat, the orange
“burner on” indicator 8 will light and the heating will be on.
When there is a need for hot water while the heating is on, it is
only necessary to turn on a hot tap. The heating will be
interrupted momentarily while the hot water is being delivered.
The boiler will switch back automatically to heating when the
tap is turned off. The TSS@ feature may cause the boiler to
light unexpectedly to maintain the temperature of the stored
water. This is quite normal.
Heating only
1) If heating is required without the need for TSS@ hot water
storage, turn the selector switch (34 fig. 22) to position ‘1111.
For example, this feature would be used if the house is to
remain heated without anyone using the hot water.
Note: If the boiler has been turned off for some time the first
attempt to light it may result in a lockout 9 . If this happens
press the reset button (41 fig. 22) and the boiler will light.
To Turn Boiler Off Completely
1) Turn the selector switch (34 fig. 22) to the off position 0.
2) Turn the gas tap (21 fig. 23) from left to right “STOP”.