Milnor 7272TG1L, Установка и обслуживание

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Gas and Air Adjustments
PELLERIN MILNOR CORPORATION
BIPDJM01 (Published) Book specs- Dates: 20061206 / 20061206 / 20061206 Lang: ENG01 Applic: PDP PD6
Gas and Air Adjustments
This instruction provides the procedures and settings required to set/verify gas pressures, pilot
flame/pressure, replace pressure switches, and adjust the minimum fire temperature. These
procedures require manometer kits KWGP030100 and KWGP150100 (available from Milnor
®
)
or equivalent equipment. Each kit includes a differential pressure gauge, fittings and tubing.
Removal of the temperature probe is not normally a part of this procedure. However, in the event
that the probe is found to be defective, observe the following caution.
CAUTION 1 : Machine Damage —Incorrect removal (or insertion) of the temperature probe
may bend it, damaging the probe.
• Remove probe by unscrewing clamp nut first, then unscrew pipe bushing.
Supplement 1
For Propane-fired Dryers
The adjustment procedure for propane-fired dryers is identical to that for dryers using natural
gas, except that propane models require one additional procedure after all other adjustments are
completed. If your dryer is fueled with propane, complete all procedures in this document, then
perform the procedure described in
Section 4 “Adjustments for Propane-fired Dryers” before
placing the dryer in service.
1.
About the Flame Control
Flame control provides both flame and ignition safeguards. When the microprocessor desires fire,
these devices check that all safety switches are made, then switch on pilot gas, spark ignition, and
main gas. While the burner is lit, the flame control monitors the flame rod voltage and, if that
voltage drops below the set point, the pilot and main gas valves shut off.
1.1.
Identifying the Type of Flame Control
—Milnor
®
dryers are supplied standard with a
Fireye
™
flame safety control or optionally with a Landis & Gyr
™
control (marked on control),
where required by local code. The type of flame control supplied must be determined before any
gas and air adjustments are made.
1.2.
How the Fireye Flame Control Works
—After loading is complete, the dryer control
turns on the main and combustion air blowers . If all safety requirements are satisfied, power is
provided to the Fireye flame control . The flame control opens the pilot gas valve and powers the
spark ignition for a maximum of 4 seconds. When the pilot flame is sensed by the flame control,
the flame control turns off the spark ignition and turns on the two
main gas valves . If the pilot
flame is not detected after 4 seconds, the flame control turns off the pilot gas valve and the spark
ignition, then locks out. This lock out energizes the fire eye tripped relay, then illuminates the
%
status light and the alarm light on the flame control. Wait two minutes, then sequentially push
K
,
A (dryer control panel), and the fireye reset button to clear the error. Observe the flame control
lamps during the restart. If the flame control fails to automatically reset, press fireye reset
immediately after the Operator control lamp illuminates (before the alarm lamp illuminates). Any
other errors illuminate the
%
status light and the related error status light. Push
K
and A to clear
these errors.
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