
lp-657 Rev. 001 Rel. 000 Date 12.10.18
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B. Check Inlet Gas Pressure
The gas valve is equipped with an inlet gas pressure tap that can be
used to measure the gas pressure to the unit. To check gas pressure,
perform the steps listed below:
1.
IMPORTANT!
Before you connect to the inlet pressure, shut off
the gas and electrical power to unit.
2. Loosen the pressure tap with a small screwdriver. Refer to Figure
35 for location.
3. Each unit is equipped with a needle valve that will accept a 5/16 ID
hose to connect to a digital manometer or liquid gauge to measure
incoming pressure from 0-35” w.c. See Figure 35.
4. Turn on the gas and power up the unit.
5. Put the unit into manual test mode (details on test mode are in
Part 10). In test mode, monitor pressure to assure it does not drop
below 1 inch from its idle reading. If gas pressure is out of range
or pressure drop is excessive, contact the gas utility, gas supplier,
qualified installer, or service agency to determine correct action that
is needed to provide proper gas pressure to the unit. If Gas Pressure
is within normal range proceed to Step 6.
6. Exit test mode, then turn power off and shut off gas supply at
the manual gas valve before disconnecting the hose from the gas
monitoring device. Tighten screw on the pressure tap and turn gas
on. Check for leaks with soapy solution. Bubbles will appear on the
pipe to indicate a leak is present.
Use two wrenches when tightening gas piping at the boiler: One
to prevent the boiler gas line from turning. Failure to prevent the
boiler gas connection from turning could result in damage to
the gas line components, substantial property damage, severe
personal injury, or death.
CSA or UL listed flexible gas connections can be used when
installing the boiler. Flexible gas connections have different
capacities and must be sized correctly for the connected boiler
firing rates. Consult with the flex line supplier to assure the line size
is adequate for the job. Follow local codes for proper installation
and service requirements.
Ensure the pressure tap screw is properly tightened to prevent gas
leaks. Failure to do so could cause substantial property damage,
severe personal injury, or death.
DO NOT adjust or attempt to measure gas valve outlet pressure. The
gas valve is factory-set for the correct outlet pressure and requires
no field adjustment. Attempts by the installer to adjust or measure
the gas valve outlet pressure could result in damage to the valve and
cause substantial property damage, severe personal injury, or death.
Ensure that the high gas pressure regulator is as least 6 – 10 feet
upstream of the appliance. Failure to do so could result in substantial
property damage, severe personal injury, or death.
Table 16 - Gas Pipe Sizing / BTU’s per Hour
Do not do a gas conversion on this boiler without an officially
approved conversion kit and instructions. Failure to use a conversion
kit when converting the boiler to fire on Natural or Propane gas
will result in extremely dangerous burner operation, leading to fire,
explosion, severe personal injury, or death.
Strain on the gas valve and fittings may result in vibration, premature
component failure and gas leakage, and result in fire, explosion,
property damage, severe personal injury, or death.
Adjustments to the throttle screw or offset may only be made by
a qualified gas technician using a calibrated combustion analyzer
capable of measuring CO2 and CO. Failure to follow this instruction
could result in fire, explosion, property damage, severe personal
injury, or death.
Gas conversion should be performed BEFORE the boiler is installed.
Carefully follow the gas conversion instructions when performing
the conversion.
Natural gas at high altitude might contain less heating value than
typical 1,000 BTU/cu ft and therefore can cause improper air / gas
mix leading to improper combustion. For natural gas installations
above 3,000 ft, call your gas provider to determine the heating value
of the supplied natural gas.
The gas piping must be sized for the proper flow and length of
pipe to avoid pressure drop. The gas meter and regulator must be
properly sized for the total gas load. If you experience a pressure
drop greater than 1” w.c. (.87 kPa), the meter, regulator or gas line may
be undersized or in need of service. You can attach a manometer to
the incoming gas drip leg after removing the cap. The gas pressure
must remain between 3.5” (.87 kPa) and 14” (3.5 kPa) during stand-by
(static) mode and while in operating (dynamic) mode.
If an in-line regulator is used, it must be a minimum of 10 feet from the
boiler. It is very important that the gas line is properly purged by the
gas supplier or utility. Failure to properly purge the lines, or improper
line sizing, will result in ignition failure. This problem is especially
noticeable in NEW LP installations and empty tank situations. This
situation can also occur when a utility company shuts off service to an
area to provide maintenance to their lines. This gas valve must not be
replaced with a conventional gas valve under any circumstances.
Natural or LP Gas
Minimum Pressure
3.5” WC
Maximum Pressure
14”WC
Table 17 - Gas Pressure Requirements
Do not fire (operate) the boiler until all connections have been
completed and the heat exchanger is filled with water. Doing so will
damage the boiler and void the warranty.
Содержание Elite FT EFT-285
Страница 22: ...lp 657 Rev 001 Rel 000 Date 12 10 18 22 Figure 9 Piping Symbol Legend ...
Страница 41: ...lp 657 Rev 001 Rel 000 Date 12 10 18 41 Figure 31 Internal Connection Diagram ...
Страница 66: ...lp 657 Rev 001 Rel 000 Date 12 10 18 66 Figure 36 Cabinet Replacement Parts ...
Страница 69: ...lp 657 Rev 001 Rel 000 Date 12 10 18 69 Maintenance Notes ...