9
INTRODUCTION
4.3
Before switching on
WARNING:
Before starting the boiler, the user must be correctly in-
structed by the installer, on how to operate the boiler, in particular:
− Make sure that the user understands that combustion air
and ventilation openings must not be restricted, closed, or
modified in any way.
− Make sure that the user is informed of all the special mea-
sures to be taken for combustion air inlet and discharging
flue gases, and that these must not be modified in any way.
− Make sure that the user keeps this manual and all other
documentation included with the boiler.
− Make sure that the user understands never to tamper with
gas control settings and that there is a risk of fire, explosion,
or CO poisoning should an unauthorized individual do so.
− Make sure that the user knows how to adjust temperatures
and controls.
9
WARNING:
Do not attempt to dry fire the unit. Starting the unit
without a full water level can seriously damage the unit and
may result in injury to personnel or property damage. This sit-
uation will void any warranty.
9
CAUTION
: All of the installation procedures in "Installation"
must be completed before attempting to start the unit.
Before switching the appliance on, please familiarize yourself with:
− how to isolate the appliance from the gas, water, and elec-
trical supplies;
− how to check and increase, if necessary, the system water
pressure;
− any external thermostats and their functions;
− the appliance controls.
4.4
Lighting the boiler
− Set the thermostat to lowest setting.
− Turn off all electric power to the appliance.
− This appliance is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner
by hand.
− Turn external gas shutoff valve clockwise to close valve to the
full OFF position.
− Wait five (5) minutes to clear out any gas. Then smell for gas,
including near the floor. If you smell gas, STOP!
− Turn gas shutoff valve counterclockwise to open valve to the
ON position.
− Turn on all electrical power to the appliance.
− Set thermostat to desired setting.
− If the appliance will not operate, follow the instructions to
Turn Off Gas To the Appliance” and call your service techni-
cian or gas supplier.
4.5
Filling the Condensate System
The condensate system must be filled with water according to the
Section "Preparation for the condensate drain".
9
WARNING
: At start-up and after prolonged shutdown of the
boiler, the condensate trap and the syphon must filled with
water prior to restarting the boiler, otherwise combustion gas-
es will enter the room with a risk of an excessive level of carbon
monoxide which could result in substantial property damage,
severe injury or death.
4.6
Filling the Boiler Heating System
To fill the heating system, proceed as follows:
− Open any automatic air vents in the heating system.
− Open the fill valve and proceed to fill the heating system and
boiler. The heating system water pressure must be higher
than 7.5 psi (0.5 bar).
− Check that there is no water leaking from the fittings. If there
is, the leaks must be repaired.
− Check the pressure during the purging process. If the pres-
sure has dropped, re-open the fill valve to bring the pres-
sure back to the desired value.
