NTI TFTN, Инструкции по преобразованию

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Part 2. Gas valve and burner setup
2. Gas Line pressure
The boiler gas valve is equipped with
a Line Pressure Test Port; see screw 1,
Figure 5.
Use the following procedure to measure
the gas line pressure to the boiler to
ensure it falls within the range given in
Table 2:
a.
b. Loosen screw 1 (Torx 10 - Line
Pressure Test Port) . This port is
directly connected to the gas line
feeding the boiler. See screw 1, Figure
5.
c. Connect a gas pressure gauge to
the line pressure test port using
applicable tubing. Ensure both
ends of the tubing make a tight
connection.
d. Turn the gas supply to the boiler on
and check for gas leaks.
e. Observe the line pressure under static
conditions and compare it to Table 2.
The pressure will be greatest under
static conditions.
1. Operating Sequence
Prior to commencing the Gas Valve and
Burner Setup, perform the following
operating sequence check:
a.
b.
Set the thermostat to the highest
setting.
c.
Ensure the combustion fan pre-
purges for a short time prior to
activating the igniter.
d.
Ensure the combustion fan post-
purges for at least 5 seconds prior to
reactivating the igniter.
e. Set the thermostat to the lowest
setting and continue with the Gas
Valve and Burner Setup procedure
outlined below.
Failure to perform the Gas Valve
and Burner Setup correctly may
result in incorrect operation,
component failure, property
damage, serious injury or death.
Table 2 – Line Pressure Parameters
Line Pressure
(inches w.c.)
Nominal Min. Max.
Natural
7 3.5 10.5
Propane 11 8 13
Failure to close the bleed screw
of the Line Pressure Test Port will
cause a severe leakage of gas,
causing property damage, serious
injury or death.
f. Observe the line pressure with the
boiler running, while checking/
adjusting the CO2 at maximum and
Compare it to Table 2. The pressure will
g. Adjust the gas line pressure to ensure
the parameters in Table 2 are attained
under all conditions.
If possible, adjust the line pressure to
the “Nominal/Desired” value listed in
Table 2 while the unit is operating at the
maximum power.
Continue observing gas line pressure
until completing of necessary Checking/
Adjusting of the CO2 (see Part 3), in case
adjustments need to be made.
h. Complete pressure testing. Remove
the tubing from the test port and then
return the bleed screw of the Line
Pressure Test Port to the closed position.
Check for gas leaks.
WARNING
DANGER
The line pressure is a function of the
such as line size and regulator
settings. Under no circumstances
or be used to adjust the gas line
pressure.
NOTICE