Specifications

SARIgas Zoom Z – ZF Page 4
Rev.1
STARTING UP THE BOILER
IGNITION OF THE MAIN BURNER (Fig. 1)
- Check that the water pressure to the system is 1 bar (pressure gauge F, Fig. 1). If the pressure is below 0.5 bar, fill
the boiler again (Fig.23/B).
- If the gas tap is installed, check it is open.
- Turn off the electric bipolar supply switch to the boiler, which is fitted on the outside of the appliance.
- Turn knob A to position I.
- The boiler is now ready to work normally. Main burner ignition is controlled by the boiler thermostat and/or the room
thermostat in the WINTER programme, or by drawing off running water, if required.
WORKING
Winter position  HEATING PROGRAMME
- Turn knob B to the WINTER position  (to the temperature you desire) and check that you can hear the circulation
pump working.
- If the system has a room thermostat fitted, it must be set to the maximum temperature.
- The burner fires automatically and the heating cycle starts up.
- Set the room thermostat to the desired temperature.
The temperature of the hot water coming from
the boiler, depending on the drawn off water
capacity (with cold water intake at 59°F)
HOT WATER REQUIRED
- Turn on any hot water tap.
- When the requirements for hot water exceed 2.8
l./min., the boiler automatically goes into hot water
production.
- Turn the temperature setting knob A to the
temperature you think best.
Summer position  HOT WATER ONLY PROGRAMME
- Turn the knob B to the SUMMER programme  .
- Turn on any hot water taps.
- When the requirements for running hot water exceed
2.8 l./min., the boiler automatically gets ready to
produce hot water.
- Turn the temperature setting knob A to the
temperature you think best
.
Fig.2
TURNING OFF
For short periods (12 – 24 hours)
- Turn the selector switch A to position 'O'.
For long winter periods
The Zoom series of boilers are fitted with an "automatic antifreeze protection system" in the heating and hot water
circuit, which triggers when temperatures fall below 3 – 5°C.
This function activates the pump and the gas burner (at minimum rated output), as long as the boiler is electrically
driven and the knob A, Fig, 1, is turned to "I". When a temperature of around 35°C is reached in the heating circuit, the
"antifreeze system" is automatically deactivated. It is good practice, however, to protect the heating circuit with a
suitable, specific chemical additive (antifreeze).
If the system is not protected with antifreeze, and the gas valves must be turned off upstream and the electrical supply
to the boiler turned off, empty the heating and the hot water circuits to avoid damage to the various components, the
heating system (pipes, radiators, etc.) and the hot and cold water supply pipes.