Honeywell MAXON VALUPAK-II Series Technical Catalogue page 11

6. Check the adjustments of the flame rod, spark
ignitor and/or pilot (See page 9 and the wiring).
7. Start all machine air blowers. Start burner with its
start-stop switch. Motor of combustion air fan will be
started shortly after, by means of the burner flame
safeguard programming relay.
8. Purge the combustion chamber, purging any explo-
sive vapors that may have accumulated prior to the
start. The length of purge time required will usually be
specified by insurance or approval agency having
jurisdiction and depends on the total amount of fresh
air and the volume of combustion space. A 5-fold
refresh rate should be minimum. At the end of the
purge time of the burner flame safeguard program-
ming relay ignition is energized and the main gas
valve will be energized shortly after.
9. Because main gas cock is closed the programmer will
lock out requiring manual reset. Operation of pro-
grammer is correct.
10. Check setting of low and high gas pressure switches
and combustion air pressure switch.
11. Check burner control valve at LO position.
12. Slowly open main gas cock. Reset burner relay and
start burner.
13. After the burner flame safeguard programmer relay
prepurge time ignition is energized and main gas
valve opened. Flame should be established within
safety time of programmer. If again flame failure, air
could still be in gas supply line just before burner.
Reset programmer and restart until low fire flame is
established. Check gas supply pressure with infor-
mation on page 2 and correct with adjusting screw of
gas pressure regulator.
multiply the referenced natural gas pressures by
0.4 to arrive at optimal LPG pressures.
flame through observation port at rear of burner.
14. Slowly bring burner to high fire position and avoid
maximum temperature of dryer. Check and correct
gas pressure on burner test connection and adjust to
value given on page 2. Close cover on pressure regula-
tor and adjust all pressure switches.
High gas pressure switch at low fire.
Low gas pressure switch at high fire.
Air pressure switch at high fire by closing of air inlet
until flame color start to change. Burner should trip
by air pressure switch.
15. Reconnect control motor wiring, start burner and
change several times between low and high fire posi-
tion by changing temperature controller settings.
16. Check all other safety devices such as pressure
switches, high temperature limits etc. and adjust
these devices to their correct values.
E - m - 6/18
In the case of LPG firing,
Observe
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VALUPAK®-II
32-00188-01