COSMOGAS BMS 10/20, Инструкция по эксплуатации, Страница: 47 / 56

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10.4 Summer-Winter Mode
By means of the circulator pump switch, (fig.34,
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.
10.5 Adjusting Central Heating
This is done by turning the central heating
regulation knob “21” (fig.34) 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.34) 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.
10.6 Mnual 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.34).
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.
10.7 Resetting the Ignition Module
The ignition module, (fig.3, 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.34) 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.
10.8 Heating Circulator Pump
The circulator pump will only start working when
heater the temperature reaches approximately
140°F and the circulator pump switch, (fig.34, 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, 4, item 7) is
open.
10.9 Low water cut-off device
This device (fig.3, item 36) shuts off the gas to
the heater if the pressure inside the heating
circuit goes below 8 psi (0.5 bar). This can be
verify by checking the reading on the pressure
gauge “8” (fig.34). The heater will not start in
this state. To reactivate the appliance you need
to bring up the pressure inside the heating
circuit to 15 psi (1 bar).
10.10 Shut-Down Procedure
To stop the supply of gas and consequently turn
the system off, turn heater temperature control
knob “5” (fig.34) to position 0.
Turn power switch “1” (fig.34) off and close the
gas cock.
10.11 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 upper 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.
10.12 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.
C OPERATING AND MAINTENANCE INSTRUCTIONS fot BTS