Common Ch Components - Rinnai I Series Installation And Operation Manual

Plumb the heating supply line to the
heating supply connection on the
bottom of the boiler.
Heating Supply Connection
Listed below are common components in a
Central Heating system. Refer to the diagram
on the next page.
•
Expansion Tank — A properly sized
expansion tank charged to 2 PSI (14 kPa)
below the cold system pressure is required
to limit pressure changes in the heating
system. When replacing an expansion tank,
consult the expansion tank manufacturer
for sizing.
•
Air Separator — An air separator is needed
on the central heating supply side of the
system to remove any air that may be
present in the piping.
•
Pressure/Temperature Gauge — The
current pressure and temperature will
alternately be displayed on the boiler
control panel. A port for an external gauge
is present in the Primary-Secondary
Heating Kit accessory offered by Rinnai.
Rinnai I-Series Condensing Boiler Combi Manual
•
Pressure Relief Valve (PRV) — A PRV
located directly on the supply side of
the boiler is required. The PRV must be
3/4 in. with at least 30 PSI (207 kPa)
and a maximum of 45 PSI (310 kPa). A
30 PSI (207 kPa) PRV is supplied with
the boiler. A port for the central
heating PRV is present in the Primary-
Secondary Heating Kit accessory
offered by Rinnai.
•
Oxygen Elimination — The boiler may
only be installed in a pressurized closed
-loop heating system, free of air and
other impurities. If using oxygen
permeable tubing in the central heating
system, a plate heat exchanger is
necessary to isolate the tubing and
boiler.
•
Low Water Cut Off (LWCO) — This
boiler has a factory-installed pressure
sensor type LWCO. The boiler's internal
LWCO is not serviceable or adjustable.
Check your local codes to determine if
a LWCO is required and if this device
conforms to the local code. If a LWCO is
required to be installed, the probe
must be located higher than the
minimum safe water level. When a
LWCO is installed, it must be wired
back to the appropriate terminal on the
boiler PC Board.
•
Water Fill Valve — Maintains proper
water pressure in the central heating
circuit.
•
Back Flow Preventer — Use a back
flow preventer in the filling circuit to
the appliance as required by local code.
•
Dirt Trap — Protects the boiler from
debris in the plumbing system.
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