General Information; Step By Step Procedure; Step-By-Step Installation - Riello Two stage operation forced draught natural gas/propane burner Installation & Operating Manual

GENERAL INFORMATION

Your Riello gas burner comes to you completely assembled and factory wired, ready for installation.
Models equipped with the short combustion head have a fixed flange, which bolts directly to the front of the appli-
ance. When equipped with the long combustion head, the burner comes with a universal flange, which when bolt-
ed to the appliance, allows the burner to be adjusted for exact positioning in the combustion zone.
STEP-BY-STEP PROCEDURE
1) Remove the burner from the carton, taking care not to lose any of the supplied accessories.
Check for signs of physical damage.
2) Bolt the combustion head and burner to the appliance. Be sure to install the supplied mounting gasket.
Ensure that the burner is level (we suggest using a spirit level) and that the combustion head is centred in the
appliance port. Refer to page 7 for positioning of combustion head relative to the chamber.
3) Check that all gas train connections are tight and make your connections to the incoming gas supply.
a) A sediment trap must be provided.
b) If not already installed, a manual shutoff valve must be supplied. This valve must be upstream of the burner
gas train supply connection.
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c) A / " NPT plugged tapping must be installed immediately upstream of the burner gas train supply connec-
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tion and must be accessible for a test gauge.
d) If required by local codes, provide gas vent lines at the gas regulators and valve (Riello gas trains are
equipped with vent limiting orifices).
e) Perform required gas pressure test on incoming gas supply lines.
NOTE: Details of sediment trap, manual gas valve and test point can be found in installation of sediment trap and burn-
er supply section.
4) Remove the red protective cover by removing the three screws. Make your adjustment of stop gate, (refer to firing
rate specifications and settings charts for details). Replace and secure the air cover plate.
5) Electrical hookup: 120Volt 60 Hz incoming power lines should be connected to Terminals 1 and 2 on burner terminal
block. A manual disconnect switch must be installed in the incoming power lines. Incoming power lines must be rigid
conduit or flexible approved cable.
CAUTION:
The hot wire must be connected to the black lead of the relay: neutral to the white lead.
Do not reverse the polarity.
The burner will not operate with the Phase/Neutral reversed, and the control box may be damaged.
Proper earth ground should be connected to the terminal block mounting plate which should be a solid green wire
to Earth Ground.
6) Start and check the burner functions as follows:
a) Make a final check on both the gas and electrical connections.
b) Check that all adjustments have been completed.
c) Loosen the screw in the manifold gas test point and install a manometer.
d) Switch on power.
e) Set the thermostat at its highest setting and press the burner reset button. Allow the burner to run through a com-
plete cycle to check control functions.
f) Turn on the manual gas valve and reset the safety. At this stage, the burner will open the air shutter and once it
is open, the burner will prepurge for aprox. 25 seconds.
Allow about 66 seconds for the control module to check all the operating circuits.
It may be necessary to repeat the starting cycle several times to free the gas train of entrapped air. If the burner goes to
lockout, reset the safety button.
7) With the burner running and flame established, check the manifold gas pressure. Adjust manifold pressure to the
correct value for the selected firing rate specified in the FIRING RATE SPECIFICATIONS AND SETTINGS chart.
After completing the setting, remove the manometer and tighten the screws.
NOTE: Do not assume the burner is operating at optimum performance.
8) Make your final combustion efficiency test and fine tune the fan air damper as necessary.
Replace the red protective cover and secure with three screws.
9) If the burner is installed on a central warm air furnace, affix the supplied warning labels to the furnace fan cover door
(inside and outside).
3245
GB
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