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4. When installing multiple boilers in the same gas supply
system it is recommended that individual positive lock-up
gas pressure regulators be installed at each unit.
PIPE SIZES FOR PROPANE GAS
Make sure to contact the gas supplier for pipe sizes, tanks, and
100% lockup gas pressure regulator.
PURGING GAS LINE
Gas line purging is required with new piping or systems in which
air has entered. Gas purging should be performed per NFPA 54
for US and CAN B149.1 for Canada.
CHECK GAS SUPPLY INLET PRESSURE
CSA or UL listed flexible gas connections are acceptable, but
make sure that the line has adequate capacity to allow your boiler
to fire at full rate. Consult with local codes for proper installation
or service procedures.
Do not adjust or attempt to measure gas control valve outlet
pressure. Attempting to alter or measure the outlet pressure
could result in damage to the valve, causing potential severe
personal injury, death, or substantial property damage.
Make sure the gas piping are sized for the proper flow and length
of pipe, to avoid excessive pressure drop. The gas meter and
the gas regulator must be properly sized for the total gas load.
Perform the below steps when checking inlet gas supply:
1. Turn the main power switch to the “OFF” position.
2. Shut off gas supply.
3. Remove the 1/8" pipe plug on the main gas shutoff valve
and install a suitable 1/8" fitting (field supplied) for the
manometer tubing. Place the tubing of the manometer over
the tap once the 1/8" fitting is installed.
4. Slowly turn on the gas supply.
5. Ensure inlet pressure is within specified range.
6. If the gas pressure is out of range, contact the gas utility, gas
supplier, qualified installer or service agency to determine
the necessary steps to provide proper gas pressure to the
control.
CHECK FOR GAS LEAKS
Before operating the boiler, make sure to check the floor near and
around the boiler for gas odorant or any unusual odor. Remove
the top access panel and check for odor in the interior of the
boiler enclosure. Do not start the boiler if there is any indication
of a gas leak. Use an approved leak detection solution and repair
any leaks at once.
In the case of propane boilers, the supplier mixes an odorant
with the propane to make its presence detectable. But in some
instances, the odorant can fade, and the gas may no longer have
an odor. Before operating the boiler, make sure the propane
supplier verify the correct odorant level in the gas.
Do not adjust or attempt to measure the outlet pressure. The
gas valve is factory set for the correct outlet pressure. This
setting is suitable for natural gas and propane, equiring no field
adjustment. Attempting to alter or measure the outlet pressure
could result in damage to the valve, causing potential severe
personal injury, death, or substantial property damage.
GAS SUPPLY CONNECTIONS
GAS SUPPLY PIPE CONNECTIONS
1. Make sure to install ground joint union for servicing.
In Canada – When using manual main shutoff to support the
weight of the piping with valves, ensure that it is identified by the
installer.
2. Install sediment trap per NFPA 54 for US and CAN B149.1
for Canada.
3. Support the piping with hangers, not by the boiler or its
accessories. The gas control valve and blower will not
support the weight of the piping. Failure to comply could
result in severe personal injury, death, or substantial
property damage.
4. Purge all air from the gas supply piping.
5. Before setting the boiler in operation, check the boiler and its
gas connection for leaks.
• Disconnect the boiler from the gas supply piping system
during any pressure testing, at a test pressure in excess
of 1/2 PSIG (3.5 kPa)
• The boiler must be isolated from the gas supply piping
system by closing a manual shutoff valve during any
pressure testing, at test pressures equal to or less than
1/2 PSIG (3.5 kPa).
Do not check for gas leaks with an open flame, instead use the
bubble test. Failure to use the bubble test or check for gas leaks
can cause severe personal injury, death, or substantial property
damage.
6. Use pipe sealing compound compatible with propane gases.
Apply sparingly only to male threads of the pipe joints so that
pipe dope does not block gas flow.
Failure to apply pipe sealing compound as detailed in this
manual can result in severe personal injury, death, or substantial
property damage.
7. Make sure the maximum inlet gas pressure do not exceed
the value specified. Minimum value specified is for input
adjustment only.
Make sure to use two wrenches when tightening gas piping at the
boiler, using one wrench to prevent the boiler gas line connection
from turning. Failure to support the boiler gas connection pipe to
prevent it from turning could damage gas line components. Do
not use wrench on valve body as damage would occur.
GAS PRESSURE REQUIREMENTS
The maximum allowable gas supply pressure for this boiler is
14 inches w.c. (3.5 kPa). Install a positive lock-up gas pressure
regulator in the gas supply line if inlet gas pressure can exceed
14 inches w.c. (3.5 kPa) at any time.
If a positive lock-up regulator is required follow these instructions:
1. Positive lock-up gas pressure regulators must be rated at or
above the input Btu/hr rating of the boiler they supply.
2. Positive lock-up gas pressure regulator(s) should be
installed no closer than 3 feet (1 meter) and no farther than
8 feet (2.4 meters) from the boiler’s inlet gas connection.
3. After installing the positive lock-up gas pressure regulator(s),
an initial nominal supply pressure setting of 7 inches w.c.
(1.7 kPa) while the boiler is operating is recommended and
will generally provide good boiler operation. Some addition
adjustment maybe required later to maintain a steady gas
supply pressure.