Instruction manual

44
B OPERATING AND MAINTENANCE INSTRUCTIONS for BMS
9.4 Summer-Winter Mode
By means of the circulator pump switch, (fig.33,
item 3), you can change over from the summer to
the winter mode, as explained below.
In the summer, the switch is turned off, allowing
the production of domestic hot water only.
In the winter or whenever central heating is
required, the circulator pump switch must be turned
on.
9.5 Adjusting Central Heating
This is done by turning the central heating
regulation knob 2 (fig.33) which optimizes the
central heating system, controlling radiator
temperature. It is advisable, during the in-between
seasons, (spring and autumn), when you want only
warm radiators, to turn the knob to minimum. In
the winter you will have to turn it to maximum,
leaving the heater temperature control knob 5
(fig.33) on 150°F.
If you want hotter central heating, adjust the above
knob by turning it to a higher temperature setting.
It is however advisable to install a room thermostat
well away from heating elements, doors and
windows.
9.6 Manual Reset High-Limit
Thermostat
This device acts on the heater, turning the burner
off completely if heater temperature exceeds 210°F.
The user can see this because the burner does
not turn on any more even if heater temperature is
low.
To restore the heater to its normal functioning
condition, unscrew and remove the protection cap
of high limit thermostat reset button 4, (fig.33).
Then press it. Use a pen or a skinny object to
manually reset (the high limit thermostat will not
reset unless the button is completely pressed). If
the high limit thermostat continues to trigger, call a
licensed authorized personnel.
9.7 Resetting the Ignition Module
The ignition module, (fig.1, item 24), carries out
numerous checks on heater functioning: on the
burner and on the flame detection system. When
the ignition module detects that one of these
components is malfunctioning, it stops the heater.
To restart, Turn the heater temperature control knob
5 (fig.33) to position 0 and reposition it on
150°F.
Once this operation has been done and if the heater
does not start up or if this situation repeats often,
call a licensed authorized personnel.
9.8 Heating Circulator Pump
The circulator pump will only start working when
heater the temperature reaches approximately
140°F and the circulator pump switch, (fig.33, item
3), is in the winter position (on position).
Initially, the circulator pump could make noises,
which are due to pockets of air left inside the water
circuit; they will disappear soon without having to
do anything. In any case, check that the cap on
the automatic air vent, (fig, 1, item 7) is open.
9.9 Shut-Down Procedure
To stop the supply of gas and consequently turn
the system off, turn heater temperature control knob
5 (fig.33) to position 0.
Turn power switch 1 (fig.33) off and close the
gas cock.
9.10 Maintenance
The heater requires no specific maintenance; to
keep it in good working order, however, it is
advisable to have the flue pipe into the heat
exchanger and burner cleaned at the beginning of
each season.
To clean proceed in this order:
a) Remove the heater jacket, the burner, the flue
gas discharge fan and the turbulators.
b) With a plastic-bristled cylindrical brush, brush
the insides of the flue gas pipes and the turbulators.
c) Vacuum away the burnt deposits from the burner
and from the ignition and detection electrodes.
However, for this cleaning job it is necessary to
call a licensed authorized technician.
9.11 Draining water from the heater
a) Turn off the main cold water supply valve.
b) Open the heating drain cock.
c) Open heating air vents.
d) Open the sanitary drain cock.
e) Open all hot water faucets to allow air to enter
into the pipes.
The heater holds approximately 4 gallons of water,
not including the water capacity of the other system
components and piping.