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•
Connect the Gas Supply
•
Gas Operating Instructions
•
Gas Pipe Sizing Reference Tables
WARNING
•
A licensed professional must install the
gas supply.
•
Turn off 120V power supply.
•
Turn off the gas.
•
Gas is flammable. Do not smoke or
provide other ignition sources while
working with gas.
•
Do not turn on the boiler or gas until all
fumes are gone.
IMPORTANT
•
The boiler shall be installed such that the
gas ignition system components are
protected from water (dripping,
spraying, rain, etc.) during appliance
operation and service (circulator
replacement, condensate trap, control
replacement, etc.).
•
A sediment trap must be provided
upstream of the gas controls.
•
A manual gas shutoff valve between the
gas supply and the boiler must be
installed.
Figure 43
Union
Sediment trap
(drip leg)
Rinnai Commercial Boiler Installation and Operation Manual
3. Check the gas supply pressure immediately upstream
4. Before placing the appliance in operation, all joints
5. Use approved and appropriately sized connectors to
6. Any compound used on the threaded joint of the gas
7. The gas supply line shall be gas tight, sized, and so
Gas Shut Off
8. Perform a leak and pressure test prior to operating
Valve
1. Check the type of gas and gas supply pressure before
connecting the boiler. If the boiler is not of the gas
type that the building is supplied with, converting the
gas type of the boiler is necessary. A gas conversion kit
is available and can be purchased as an accessory.
Remove the Gas connection cap on the bottom of the
boiler before connecting the gas supply piping (Figure
44).
Figure 44
at a location provided by the gas company. Supplied
gas pressure must be within the limits shown below:
Natural Gas: 3.5 in. - 10.5 in. wc (0.87 - 2.61 kPa)
Propane Gas: 8.0 in. - 13.5 in. wc (1.99 - 3.36 kPa)
Maximum gas pressure checked with no flow (lockup)
or with boiler on.
Minimum pressure checked with gas flowing and unit
running at 100% of the firing rate.
including the heater must be checked for gas tightness
by means of soap, gas leak detector solution, 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.
connect the boiler to the gas line. Purge the gas line of
any debris before connection to the boiler.
piping shall be a type that resists the action of
liquefied petroleum gas (propane/LPG).
installed as to provide a supply of gas sufficient to
meet the maximum demand of the heater and all
other gas consuming appliances at the location
without loss of pressure. If in doubt about the size of
the gas line, refer to section "6.3 Gas Pipe Sizing
Reference Tables."
the boiler. If a leak is detected, do not operate the
boiler until the leak is repaired.
47
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