Rapid 7500 136, Инструкция по установке, эксплуатации и обслуживанию

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7500-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
132 of 143
Gas Operation (continued)
19.5 Oil Operation
PROBLEM POSSIBLE CAUSE SOLUTION
Car b on Monoxide
Readings on Gas Firing
Flame impingement on cold start- u p of heat
exchanger ca u sed b y excessi v e firing rate.
Red u ce firing rate to correct inp u t
v ol u me.
Incorrect gas/air ratios. Readj u st bu rner to correct CO
2
/O
2
le v els, red u cing CO formation to
appropriate le v el.
Gas High Fire Inp u t
Cannot Be Achie v ed
Gas company press u re reg u lator or meter operat-
ing incorrectly, not allo w ing req u ired gas press u re
at gas train inlet.
Ha v e gas company correct.
Gas cock u pstream of train inlet not f u lly open. Check and correct.
Gas line o b str u cted. Check and correct.
Gas train main and/or leak test cocks not f u lly
open.
Check and correct.
A u tomatic gas v al v e not opening f u lly d u e to
defecti v e operation.
Replace gas v al v e.
On mod u lating bu rner, bu tterfly v al v e not f u lly
opened.
Readj u st.
Defecti v e main gas press u re reg u lator. Replace.
Main gas press u re reg u lator v ent line o b str u cted. Check and correct.
Normally open v ent v al v e (if s u pplied) not closing
w hen a u tomatic gas v al v es open.
Check to see if v al v e is f u lly closed
w hen a u tomatic v al v es are open.
Replace v ent v al v e, if not closing
f u lly.
PROBLEM POSSIBLE CAUSE SOLUTION
B u rner Motor R u ns, bu t
Direct Spark Ignited Oil
Flame is Not Esta
b lished
Defecti v e oil nozzle. Remo v e and clean or replace.
Lo w oil press u re. Check w ith ga u ge for correct light-off
press u re.
Defecti v e oil p u mp. Replace.
Defecti v e oil solenoid v al v e. Replace.
Oil p u mp co u pling loose or defecti v e. Replace or tighten as req u ired.
Lo w oil press u re s w itch (if s u pplied) defecti v e. Adj u st or replace s w itch.
Ignition transformer defecti v e. Replace.
Ignition electrode set incorrectly. Remo v e electrodes and reset.
Ignition electrodes cracked and gro u nding o u t
spark.
Replace electrodes.
Ignition lead w ire defecti v e and gro u nding spark
o u t.
Replace.
Ignition pl u g-in connections at transformer or elec-
trodes loose.
Tighten.
Air flo w s w itch (if pro v ided) not making. Reset press u re or replace.
Defecti v e flame safeg u ard control or pl u g in p u rge
timer card.
Replace.
Air dampers held in high fire position d u e to
mechanical b inding of linkage.
Readj u st linkage.
Loose w iring connections. Check and tighten all connections.