Instructions / Assembly

LP-387 Rev. 011 Rel. 006 Date 6.28.19
44
Part 8 - 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 liqueed 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 minimum of no less than 3.5” water column,
a maximum inlet pressure of no greater than 14” water column (350
mm), and ½ pound pressure (3.5 kPa). The entire piping system, gas
meter, and regulator must be sized properly to prevent excessive
pressure drop (greater than 0.5” WC) as stated in the National Fuel Gas
Code. This information is listed on the rating plate.
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 identied 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 blockage or
obstruction of gas ow which may aect the operation of the unit.
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 Teon 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.
Figure 34 - Gas Connection
The gas connection on the boiler is 3/4”. 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 pressure 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.
Never use an open ame (match or lighter) to check for gas
leaks. Use a soapy solution to test connection. Failure to use a
soapy solution test or check gas connection for leaks can result
in substantial property damage, severe personal injury, or death.