Combustion Gas Exhaust - Riello Array AR 399 SE Installation, Operation And Service Manual

INSTALLATION
Natural Gas and Propane Installation Code, in Canada as well
as local regulations.
9
Intake pressure with the appliance in the off position has the
following reference values:
− Natural Gas: optimal pressure 7" w.c.
− Liquid Propane Gas (LPG): optimal pressure 11" w.c.
9
The minimum and maximum pressure for natural gas are 3.5"
W.C. (8.7 mbar) and 13.5" W.C. (33.6 mbar) respectively.
9
The minimum and maximum pressure for LP gas are 8" W.C.
(19.9 mbar) and 13.5" W.C. (33.6 mbar) respectively.
0
WARNING: Do not use any fuels with this product other than
the fuel it is intended to be used with, either Natural Gas or
LPG.
9
Ensure the gas lines are vented, bled in accordance to ANSI
Z223.1/NFPA 54, National Fuel Gas Code and/or CAN/CSA B149.1,
Natural Gas and Propane Installation Code.
While it is normal for the inlet pressure to decrease while the ap-
pliance is in operation, it is advisable to verify that no excessive
pressure fluctuations take place. In order to limit the extent of
these types of variations, the diameter of the gas supply line to
be used must be assessed based on the length and the pressure
drops of the line itself, from the meter to the boiler.
9
WARNING: If fluctuations in the gas distribution pressure are
encountered, it is recommended to install an appropriate
pressure regulator upstream of the appliance's gas inlet. For
LPG gas supply, all the necessary precautions must be taken in
order to prevent the gas from freezing in the case of extremely
low outdoor temperatures.
If the gas distribution network contains solid particles, install a
filter on the fuel supply line. When selecting it, consider that pres-
sure drops due to the filter should be as low as possible.
0
CAUTION: The boiler and its individual shut off valve must be
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
1/2 psi (3.5 kPa).
9
A sediment trap must be provided upstream of the gas con-
trols.
9
A gas shutoff cock shall be located upstream of the boiler on
the gas supply line.
9
On completion of the installation, check that all joints are
sealed.
GAS
Fig. 19 Gas inlet
DESCRIPTION Array AR 399 SE
Gas inlet 1" NPT

3.13 Combustion gas exhaust

For flue gas exhaust and the intake of combustion air, it is essen-
tial to use only specific approved pipes for condensing boilers and
ensure that they are correctly connected, as shown in the instruc-
tions supplied by the vent manufacturer.
9
WARNING: Do not connect this appliance's flue gas exhaust
pipes with those of other appliances, unless this is specifi-
cally authorized by the manufacturer. Failure to comply with
this precaution may cause a build-up of carbon monoxide in
the room where the appliance is installed causing substantial
property damage, server personal injury or death.
9
NOTE: For further information on flue gas exhaust pipes for the
Array AR SE series connected in a cascaded system, see section
"Multiple boiler cascade system".
9
WARNING: Ensure that Intake combustion air is not contami-
nated by:
− waxes/chlorinated detergents
− chemical products based on swimming pool chlorine
− calcium chloride
− sodium chloride used to soften tap water
− refrigerant leaks
− paint or varnish removers
− chloridric acid/muriatic acid
− cements and glues
− anti-static softeners used in dryers
− chloride used for domestic or industrial applications as de-
tergent, whitener or solvent
− adhesives used to glue construction and other similar
products.
9
To prevent contamination of the boiler, do not install combus-
tion air intake and gas flue exhaust pipes near:
− dry-cleaners/laundry rooms and factories
− swimming pools
− metal processing plants
− beauty parlours
− fridge repair shops
− photo-processing facilities
− body-shops
− plastics manufacturing plants
− furniture workshops and manufacturing plants.
24
Array AR 500 SE
1" NPT Ø