38
Boiler Manual
PART 7: GAS PIPING
(CONTINUED)
C. CHECK INLET GAS PRESSURE
The gas valve is equipped with an inlet gas pres-
sure tap that can be used to measure the gas
pressure to the unit. To check gas pressure, per-
form the steps listed below:
1. Before you connect to the inlet pressure, you
must shut off the gas and electrical power to
unit.
2 Loosen the pressure tap with a small screw-
driver. Refer to Figures 7-2 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 7-1.
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 11 Section B). In service
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 the screw on the
pressure tap tightly and turn gas on and
checks for leaks with soapy solution.
It is recommended that a soapy solution be used
to detect leaks. Bubbles will appear on the pipe
to indicate a leak is present. The gas piping must
be sized for the proper flow and length of pipe
to avoid pressure drop. The gas meter and the
gas 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, regula-
tor or gas line may be undersized or in need of
service. You can attach a manometer to the
incoming gas drip leg by removing the cap and
installing the manometer. 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 regula-
tor is used, it must be a minimum of 10 feet from
the Elite Heating 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 igni-
tion failure.
This problem is especially notice-
able in NEW LP installations and also in 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 conven-
tional gas valve under any circumstances.
n
WARNING
Never use an open flame (Match or Lighter) to
check for Gas leaks. Use A soapy solution to
test gas connection for leaks. Failure to use
soapy solution test or check gas connection for
leaks can cause substantial property damage,
severe personal injury or death.
NOTICE
CSA or UL listed Flexible gas connections can
be used when installing The Elite Heating
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
adequately sized for the job. Follow local codes
for proper installation and service requirements.
Fig. 7-1
LP-205-W Rev. 7/24/09
Содержание EL-110 LP
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