Rapid 7500 136, Инструкция по установке, эксплуатации и обслуживанию

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SECTION 16: S
TART
-
UP
P
ROCEDURES
113 of 143
damper linkage operation to achie v e 8.5 to
10% CO
2
and 0% CO at the f u ll high fire inp u t
rate position. Make certain the linkage oper-
ates smoothly and
w ith-o u t b inding or o v er
tra v el of the air damper stops. R u n bu rner to
the lo w fire position and lock motorized gas
v al v e internal lo w fire adj u stment to a setting
that w ill attain 7 to 9% CO
2
and 0% CO at the
desired lo w fire inp u t rate.
10. For f u ll mod u lation bu rners, adj u st the main
gas press u re reg u lator in com b ination w ith the
air damper and metering v al v e linkage opera-
tion to achie v e 8.5 to 10% CO
2
and 0% CO at
the f u ll high fire inp u t rate position. R u n bu rner
to the lo w fire position and lock the metering
v al v e external adj u stment to a setting that w ill
attain 7 to 9% CO
2
and 0% CO at the desired
lo w fire inp u t rate. Check for proper com bu stion
at the midpoint rate (7 to 9% CO
2
and 0% CO)
and make s u re the linkage operates smoothly
and w itho u t b inding or o v er tra v el of the air
damper and metering v al v e stops.
11. Re-check all reset s w itches - bu rner relay, lim-
its, press u re c u t-off s w itches, and, if necessary,
main fan & bu rner motor o v erload reset bu t-
ton(s). Set the room thermostat and/or d u ct
thermostat to the desired temperat u res.
NOTE: When firing natural gas and LPG, it is possible to attain
CO
2
readings that appear to be acceptable (i.e., 8%, 9%, 10%,
etc.) while actually producing an unsafe condition. At such CO
2
readings, a deficiency of air will create the formation of CO (Car-
bon Monoxide) in the flue gases. Therefore, when firing gas, test
for CO to make certain that the burner is adjusted so that it has
an excess, rather than a deficiency, of air, CO is a
dangerous product of incomplete combustion and is associated
with combustion inefficiency and increased fuel cost. O% CO
(Carbon Monoxide) may not be achievable. Readings between
0 and 100 PPM are desirable with the maximum level
determined by local codes.
16.10 Oil Fired E q uipment Start-Up Procedures
1. Re v ie w the proced u res in this section b efore
proceeding.
2. Verify the bu rner air dampers are approxi-
mately 1/4" (.64 cm) open and start the bu rner.
The ignition circ u it w ill b e energized after the
b lo w er pre-p u rge period has b een completed
and all limit and other interlock circ u its ha v e
b een closed.
3. The bu rner is direct spark ignited. Either
remo v e the flame sensor from its sight pipe or
electrically disconnect the main oil solenoid
v al v e and start the bu rner. Regardless of ho w
the bu rner is started, the flame safeg u ard con-
trol w ill not detect flame and sho u ld go into a
safety locko u t mode req u iring man u al reset of
the flame safeg u ard control. There m u st b e no
indication of oil press u re at the oil nozzle u ntil
the main oil v al v e is energized thro u gh the
flame relay.
4. Restart the bu rner and allo w normal seq u enc-
ing to b ring on ignition. Once the main solenoid
oil v al v e is energized, the oil flame sho u ld b e
esta b lished immediately. If not, sh u t the system
do w n and make corrections as req u ired. DO
NOT repeatedly recycle the bu rner, allo w ing
acc u m u lation of u n bu rned f u el in the com bu s-
tion cham b er. This could result in fire or
explosion.
5. For small "on/off" bu rners w ith a simplex noz-
zle, adj u stments consist primarily of attaining
correct f u el/air ratios. Adj u stments sho u ld b e
set to o b tain 11-12% CO
2
and no more than #2
smoke.
6. Fixed air lo w fire start bu rners w ith simplex
nozzles req u ire correct f u el/air ratios for high
fire and sho u ld b e set no more than #2 smoke
at high fire w ith 11-12% CO
2
. Lo w fire nozzle
press u res are set to achie v e smooth light-off
w ith the air dampers fixed in the high fire posi-
tion.
7. High/lo w /off bu rners sho u ld ha v e initial adj u st-
ments made at the light-off position. After the
light-off f
u el/air adj u stments are made, r u n the
bu rner to the high fire position and make
adj u stments as req u ired for good operation.
Adj u stments sho u ld pro v ide 11-12% CO
2
w ith
no more than #2 smoke at high fire and 8-10%
CO
2
w ith no more than a #2 smoke on lo w fire.
8. For f u ll mod u lation bu rners, start adj u stments
in the lo w fire position. Adj u st the air and f u el
linkage to o b tain a f u el/air ratio of 8-10% CO
2
and no more than #2 smoke. Mark the linkage
for this setting. Increase the firing rate to the
mid-fire position. Set the f
u el/air ratios to
achie v e 9-11% CO
2
and no more than #2
smoke. Mark the linkage as a reference point
for this mid-fire position. Increase the rate to
the high fire position. Res
u lts sho u ld b e 12.5%
CO
2
and no more than #2 smoke. Mark this
position on the linkage. Operate the mod u lat-
ing arm thro u gh the three pre v io u sly deter-
mined reference points. Minor setting changes
may
b e req u ired to ens u re that the proper CO
2
and smoke req u irements are achie v ed. R u n