Outdoor Temperature Sensor; Venting - Riello Array AR 3000 Installation And Operation Manual

This output needs a minimum load of approx. 10VA to work correctly
and the max load must be limited to 50VA at mains voltage.
Connection of an external relay to this output to be able to switch
a higher load is only possible when an additional resistor or load
is added to make sure the minimum load requirements are met.

4.14.3 Outdoor Temperature Sensor

If an outdoor temperature sensor is to be used, the outdoor probe
needs to be connected to terminals 5 and 6 as shown in Fig. 24.
The outdoor probe shall be installed on an outer wall, North or
North/East, away from windows, door, and ventilation grids.
Never install the probe in a position exposed to the sun.
The maximum length is 300' (100 meters), if the cable length
exceeds 32' (10 meters) a shielded cable is required and shall be
connected to chassis ground.
NOTE: All sensors and low voltage wiring shall not be routed in
direct contact or near high voltage power.

4.15 Venting

Array boilers must be vented and supplied with combustion and
ventilation air as described in this section.
Installation must comply with local requirements and with the
National Fuel Gas Code ANSI Z223.1. Array boilers vent and air piping
can be installed through the roof or through a sidewall.
Any of the vent/air piping methods covered in this manual can be
used. Do not attempt to install the boilers using any other means.
Suitable, UL approved, positive pressure, watertight vent materials
MUST be used for safety and UL certification.
AR 3000 and AR 4000 boilers can use the following material for
venting:
Material Standard
CPVC Schedule ANSI/ASTM
40, 80 F441
Polypropylene ULC S636
AL29-4C
UL 1738
stainless steel
For specific venting components (terminals, fittings), contact the
respective vent manufacturer.
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DANGER: It is extremely important to follow these venting
instructions carefully. Failure to do so can cause severe
personal injury, death or substantial property damage.
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DANGER: Use of cellular core PVC (ASTM F891), cellular core CPVC
or Radel® (polyphenosulfone) in venting systems is prohibited.
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WARNING: Do not connect this gas appliance with any other
appliance unless approved by manufacturer. Failure to comply
with this WARNING could result in the accumulation of carbon
monoxide gas which can cause severe personal injury or death.
8" Flue Gas
10" Air intake
Maximum Flue Approved
Temperature (°F) Manufacturers
194
Centrotherm Eco
230
Systems (InnoFlue SW)
300+, limited only
by rating of seals
Adapter
10" Flue Gas
connection
Fig. 26 Combustion Air and Flue Gas Connections
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DANGER: The condensate traps must be filled with water
or combustion gases will enter the room with a risk of an
excessive level of carbon monoxide.
− Vent connectors serving appliances vented by natural draft
shall not be connected to any portion of mechanical draft
systems operating under positive pressure.
− Ensure that the flue pipes and seals are not damaged.
− Use only primer and glue compounds approved for use
with the vent material used.
− Never install a barometric or a thermally controlled vent
damper with this boiler.
− Do not route the flue system piping through or inside
another duct that is used for exhausting air or other flue
gases.
− The condensate traps must be primed at all times. Failure
to do so may allow combustion gases to escape into the
boiler room.
− The unit is to be used for either direct vent installation or for
installation using room air for combustion. When room air
is used, it is necessary to provide an adequate opening for
the fresh make-up air intake.
− You must use any of the vent/air piping methods shown in
this manual.
− Be sure to locate the unit such that the vent and combustion
air piping can be routed through the building and properly
terminated.
− The boiler / vent installation must be in accordance with
Venting of Appliances, of the latest edition of the National
Fuel Gas Code, ANSI Z223.1/NFPA or applicable provisions of
the local, state and federal building codes.
− All vent pipes must be installed according to the vent
manufacturer's instructions.
− The exhaust vent and the combustion air inlet lines must be
supported to prevent sagging per the vent manufacturer's
instructions.
− Do not mix components from different systems. The vent
system could fail, causing leakage of flue products into the
living space. Use only approved materials.
− The boiler must not support the weight of any ductwork.
− Use of cellular core PVC and CPVC for venting system is not
allowed.
− The vent system shall be installed so as to prevent the
accumulation of condensate.
− Consult local and state codes pertaining to special building
code and fire department requirements. Adhere to national
code requirements.
− Observe the listed maximum lengths of vent system, which
are boiler model dependent.
− To avoid moisture and frost build-up and to maintain
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clearances to openings on adjacent structures, 45° and
90° elbows or tees may be attached to the end of the
vent termination pipe to direct exhaust plumes away from
the adjacent structure. The total allowable vent length,
maximum number of elbows and distance of air intake
restrictions must be adhered to.
− Due to the high efficiency of the unit it may discharge what
looks like white smoke especially when the outside air
temperature is cold. This is due to the presence of water
vapor, normally present in the exhaust gases.
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INSTALLATION