Emerson Process Management 760004-A - Manual (Page 33)

Instruction Manual
760004-A
February 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Operation 3-3
Model NGA 2000 HFID
and the Purge Gas variable does not read
"ON," contact factory. If the safety system
is initiated successfully (Purge Gas vari-
able is "ON"), continue with the remainder
of the startup procedure.
NOTE
Do not restrict the PURGE OUT port
and the pressure relief valve. They
must be vented to atmospheric pres-
sure.
13. Manual or Auto-ignite the flame. The
Flame-On green LED should be illumi-
nated.
Two methods of burner ignition are possi-
ble: auto-ignition and manual ignition.
(Note: The burner is easier to ignite when
the oven has reached the desired setpoint
temperature.)
Auto-ignition provides fuel override and
three attempted ignitions (default setting),
if necessary.
Before ignition and operation, Fuel Flow
must be set to ON in "Light Flame" display
screen under Basic Controls and oven
temperature must be at least 85
°C.
The manual ignition switch on the Ana-
lyzer Module front panel must be ma-
nipulated in the following ways:
• Press up and hold for one minute.
This opens burner fuel and air sole-
noids.
• Press down to ignite burner glow plug
for up to 10 seconds.
• Repeat as necessary (if fuel and air
sources are farther away than 10 feet,
several more attempts may be neces-
sary).
• If the flame has been lit, but the flame
temperature increases slowly, per-
form the following steps:
ƒ After igniting flame, release
switch for 2 seconds
ƒ Press switch down for
2 seconds
ƒ Repeat release switch and
press down steps as
necessary.
14. Allow the case and oven to warm up, ap-
proximately 1 to 2 hours.
15. Verify that all 4 LEDs are illuminated.
16. Note the four LEDs on the front panel of
the Analyzer Module. They provide nec-
essary information for either ignition pro-
cedure. The LEDs, when illuminated,
denote the following information:
• Green - unit powered on
• Amber - continuous illumination im-
plies oven has reached operating
temp. Within ±6
°C of setpoint
• Green - Flame on
• Green - purge air system intact (it has
filled five volumes of the module inte-
rior)
17. Check and re-adjust the internal pres-
sures if required.
The unit is ready for operation.
3-3 BINDING
To achieve full coordination between Analyzer
Modules and associated I/O Modules, the
user must bind those components together in
the System Set Up portion of the Technical
Configuration Menu in software.