LP-293 Rev. 9.24.15
40
Part 7 - Gas Connections
Failure to follow all precautions could result in re, explosion,
severe injury, or death.
It is very important that you are connected to the type of gas
noted on the rating plate. “LP” for liqueed petroleum, propane
gas, or “NG” for natural or city gas. Do not do a gas conversion
without an approved gas conversion kit. Prior to turning the
gas on, all gas connections must be approved by the local gas
supplier or utility, in addition to the governing authority.
A gas conversion kit comes with the boiler. Follow the included
instructions VERY carefully if converting the boiler. Failure
to follow gas conversion instructions could result in property
damage, serious injury, or death.
The gas supply shall have a maximum inlet pressure of less than
14” w.c. (3.5 kPa), and a minimum of 3.5” w.c. (.87 kPa). The
entire piping system, gas meter and regulator must be sized
properly to prevent pressure drop greater than 0.5” (.12 kPa) as
stated in the National Fuel Gas Code. This information is listed
on the rating label.
UL recognized fuel gas detectors are recommended in all
enclosed propane and natural gas applications where there is a
potential for an explosive mixture of fuel gas to accumulate. The
installation of these detectors should be made in accordance
with the detector manufacturer’s recommendations, and/
or local laws. Failure to install fuel gas detectors in these
applications could result in re, explosion, property damage,
severe personal injury, or death.
A. Gas Piping
1. Run the gas supply line in accordance with all applicable codes.
2. Locate and install manual shuto valves in accordance with
state and local requirements.
3. In Canada, the Manual Shuto must be identied by the
installing contractor.
4. It is important to support gas piping as the unit is not designed
to structurally support a large amount of weight.
5. Purge all gas lines thoroughly to avoid start up issues with air
in the lines.
6. Sealing compound must be approved for gas connections.
Care must be taken when applying compound to prevent
Support gas supply piping with hangers, not by the boiler
or its accessories. The boiler gas valve and blower will not
support the weight of the piping. Make sure the gas piping
is protected from physical damage and freezing, where
required. Failure to follow these instructions could result in
gas leakage, and result in re, explosion, property damage,
severe personal injury, or death.
Do not use Teon tape on gas line pipe thread. Use a pipe
compound rated for use with natural and propane gases.
Apply sparingly on male pipe ends, leaving the two end
threads bare and ow unobstructed. Failure to follow these
instructions could result in gas leakage or blockage, and
result in re, explosion, property damage, severe personal
injury, or death.
Gas Supply
Manual Shut Off
(Field Supplied)
Drip Leg
Union
Piping Support
Figure 29 - Gas Connection
The gas connection on the boiler is 3/4” for the EL-80/110/150
and 1” for the EL-220/299/301/399. It is mandatory that this
tting is used for connection to a eld fabricated drip leg as
shown in the illustratioN per the National Fuel Gas Code. You
must ensure that the entire gas line to the connection at the
boiler is no smaller than the unit supplied connection.
Once all inspections have been performed, the piping must
be leak tested. If the leak test requirement is a higher test
pres¬sure than the maximum inlet pressure, you must isolate
the boiler from the gas line. In order to do this, shut the gas
o using factory and eld-installed gas cocks. This will prevent
high pressure. Failure to do so may damage the gas valve. In the
event the gas valve is exposed to a pressure greater than ½ PSI,
14” w.c. (3.5 kPa), the gas valve must be replaced. Never use an
open ame (match, lighter, etc.) to check gas connections.
blockage or obstruction of gas ow which may aect the
operation of the unit.
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