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7
Gas connections
When re-tightening the set screw, be sure
WARNING
⚠
to tighten securely to prevent gas leaks.
Do not check for gas leaks with an open
flame -- 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.
14. Turn on the gas supply at the manual gas valve.
15. Turn the power switch to the "ON" position.
16. Adjust the temperature set point on the control panel of
the SMART SYSTEM control module to the desired
water temperature so the appliance will call for heat.
17. Check burner performance by cycling the system while
you observe burner response. The burner should ignite
promptly. Flame pattern should be stable. Turn system
off and allow burner to cool, then cycle burner again to
ensure proper ignition and flame characteristics.
Figure 7-4 Inlet Gas Supply Check
DETAIL
(continued)
REMOVE THE 1/8" (3 MM) PIPE PLUG ON
THE INLET FLANGE TO THE VALVE AND
INSTALL A SUITABLE 1/8" (3 MM) FITTING
(FIELD SUPPLIED) FOR THE MANOMETER
TUBING.
IMG01006
Installation & Operation Manual
Gas pressure
The gas pressure must remain between 4 inches w.c.
(.99 kPa), and maximum 14 inches w.c. (3.5 kPa) for Natural
gas and between 8 inches w.c. (1.9 kPa) minimum and 14
inches w.c. (3.2 kPa) maximum for LP gas during standby
(static) mode and while in operating (dynamic) mode. If
an in-line regulator is used, it must be a minimum of 10
feet (3 m) from the FTXL boiler. It is very important that
the gas line is properly purged by the gas supplier or utility
company. Failure to properly purge the lines or improper
line sizing, will result in ignition failure.
The problem is especially noticeable in NEW LP installations
and also in empty tank situations. This can also occur when
a utility company shuts off service to an area to provide
maintenance to their lines.
Gas valve replacement
The gas valve MUST NOT be replaced with a conventional
gas valve under any circumstances. As an additional safety
feature, this gas valve has a flanged connection to the venturi
and blower.
Failure to follow all precautions could
WARNING
⚠
result in fire, explosion, or death!
DO NOT adjust gas valve outlet pressure.
WARNING
⚠
Attempting to alter the gas valve outlet
pressure could result in damage to the
valve, causing potential severe personal
injury, death, or substantial property
damage.
45
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