Gas Connection; Adjust Gas Pressure Settings - Rinnai EX22CT Installation And Operation Manual

Checklist for Venting
□
Verify proper clearances around the vents and air
intakes.
□
Ensure you have used the correct venting
products for the model installed and that you have
completely followed the venting manufacturer's
installation instructions and these installation
instructions.
□
Verify that the vent system does not exceed the
maximum length for the number of elbows used.

Gas Connection

WARNING
When connecting the gas valve or other gas
components in the gas line, use a backup wrench to
ensure the connection is gas tight.
 The gas supply line shall be gas tight, sized and so
installed as to provide a supply of a gas sufficient to
meet the maximum demand of the furnace without
loss of pressure.
 A shut off valve and appliance connector valve
should be installed in the upstream of the gas line
to permit servicing.
 Flexible pipe and any appliance connector valve
used for gas piping shall be types approved by
nationally recognized agencies.
 Any compound used on the threaded joint of the
gas piping shall be a type which resists the action
of liquefied petroleum gas (propane / LPG).
 After completion of gas pipe connections all joints
including the furnace must be checked for gas
tightness by means of leak detector solution, soap
and water, or an equivalent nonflammable solution,
as applicable. (Since some leak test solutions,
including soap and water, may cause corrosion or
stress cracking, the piping shall be rinsed with
water after testing, unless it has been determined
that the leak test solution is non-corrosive.)
 Check the gas supply pressure immediately
upstream at a location provided by the gas
company. Supplied gas pressure must be within
the limits shown in the Specifications section.
 Refer to an approved pipe sizing chart if in doubt
about the size of the gas line.
 Install manual gas cut-off valve so that it can be
accessed for easy operation. Do not conceal
manual cut-off valve behind back spacer.
16 Rinnai Corporation EX17CT, EX22CT Manual

Adjust Gas Pressure Settings

Complete these instructions for altitude and vent
length.
(Default altitude: 0ft - 2,000ft. Default vent length:
0 - 7ft+1 elbow )
For high altitude installations in Canada, the conversion
shall be carried out by a manufacturer's authorized
representative, in accordance with the requirements of
the manufacturer, provincial or territorial authorities
having jurisdiction and in accordance with the
requirements of CAN/CGA-B149.1 or CAN/CGA-B149
installation codes.
CAUTION
Do not touch any other areas on the PC board
besides the "SW" switches while power is supplied to
the appliance. Parts of the PC board are supplied
with 120 volts AC.
CAUTION
Do not insert hands or objects into the circulation fans
while they are running. Injury or mechanical
malfunction may occur.
CAUTION
Do not touch the areas at or near the exhaust. This
area becomes very hot and could cause burns.
NOTICE
The regulator has been factory pre-set. If the
pressure is incorrect, check the supply pressure first,
before making any adjustments to the appliance.
Also, if the low control pressure cannot be obtained,
adjust the adjustment screw on the proportional valve
to roughly set pressure and then recheck both the low
and high fire pressures.
Manual gas
shut-off valve