25
ATI SP 80, 120, 220, 300, 400 – INSTALLATION INSTRUCTIONS
Sept - 01
2.10 STARTING THE WATER-HEATER
Before starting the water-heater ensure that:
•
the appliance is set to function with the correct gas
type.
•
the current standard and provisions relating to the
installation of these appliances, particularly with
regard to correct connection of the combustion
product flue line and gas supply line pipe have
been observed.
•
the electrical supply is on and earthing has been
carried out in accordance with current regulations.
•
the gas isolating cocks on the meter and in the
vicinity of the heater are open.
•
the water heater is full of water.
2.11 FAULT FINDING
The control device locks out without ignition.
•
the flame detection circuit of the control is faulty
and the control self-check prevents the continuation
of the cycle
•
the flame detection electrode has a loose earth
connection
At the end of the pre-purge cycle the ignition
electrode does not spark and the control goes to
lock-out.
•
the ignition transformer inside the control is faulty
•
the ignition electrode connection at the terminals of
the appliance is broken
At the end of the pre-purge cycle the ignition
electrode provides a spark, but the flame does not
form and the control goes to lock-out.
•
gas supply is off or air is present inside the line
•
the gas valve does not open because the solenoids
are faulty or their electrical connection are broken
•
only for mod. 80 and 120: the safety limit
thermostat has tripped
At the end of the pre-purge cycle the ignition
electrode provides a spark, but the flame forms
but the control goes to lock-out.
•
the flame is not establishing correctly owing to
lack of gas pressure
•
the detection electrode is not correctly positioned
and is not in contact with the flame
•
the electrical connection of the detection electrode
is broken
•
Live and Neutral connections may be reversed.
The control goes into lock-out during normal
functioning.
•
the gas supply has been interrupted, even
temporarily: the control box has not detected the
presence of flame and it has gone to lock-out
•
one of the cases in preceding points has occurred
during an intermittent functioning cycle
•
Live and Neutral connections may be reversed.
The heater functions for brief intermittent
periods, even though the thermostat is
functioning correctly and is in the heat
requirement position.
•
the adjustable control thermostat is defective and
is not detecting the correct temperature
•
the pressure switch stops the burner because the
flow from the fan is not correct owing to an
obstruction in the flue system or excessive length
•
Live and Neutral connections may be reversed.
The control box is not in lock-out but the cycle
remain in pre-purge.
•
the pressure switch does not allow for continuation
of the cycle because the flue system is obstructed
•
the pressure switch does not allow for continuation
of the cycle because the fan is not functioning
correctly or does not exert sufficient pressure
•
the pressure switch does not allow functioning
because it is faulty or its electrical connections are
broken
•
the pressure switch does not allow functioning
because the pressure line is obstructed or the
silicon tube is detached or broken
The control box is not in lock-out but the cycle
doesn’t start.
•
during the initial check of the control the pressure
switch contacts have been found in the closed
position (because they are stuck or owing to
incorrect setting of the pressure switch) and
accordingly do not enable the continuation of the
cycle.
For safety and warranty validity original
components and spare parts should be used
for replacement
