Rapid 2005, Инструкция по установке, эксплуатации и обслуживанию

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B-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
138 of 147
22.3 Burner
PROBLEM POSSIBLE CAUSE SOLUTION
Flame control does not try for
ignition
A u xiliary contact "M1" not closed. Po w er on terminal
"4"?
Properly mo u nt contact or replace
B u rner/ w inter s w itch closed? Po w er on terminal "7"? Replace s w itch
High temp limit s w itch tripped? Po w er on terminal
"8"?
Man u ally reset or replace
Lo w airflo w press u re s w itch contacts not made.
Po w er on terminal "8A"?
Check blo w er operation
Reconnect t u bes to press u re
s w itch
Clean press u re test t u bes
Check filters/d u ct w ork for restric-
tions
High airflo w press u re s w itch contacts not made.
Po w er on terminal "9"?
Check blo w er FLA and compare to
data plate.
Cabinet press
u re too high check
system set u p and for restrictions
do w n stream of blo w er.
Optional: Mild w eather stat, dial set to lo w
Set dial higher
Replace stat
Optional: High gas press u re s w itch
Man u al reset
Verify gas press u re
Optional: Lo w gas press u re s w itch
Man u al reset
Verify gas press u re
No po w er bet w een terminals 3 and L2 (ne u tral) or 6
and L2 (ne u tral) for RM7890A (5 and L2 (ne u tral) or
7 and L2 (ne u tral) for RM7897C) of the b u rner control
base
Verify w iring
Flame control defect Replace
B u rner Locko u t
Fail u re to ignite pilot or main flame
Flame control fail u re
Reset the flame control mod u le at
the u nit and proceed to the next
step, obser v ing the u nit to indicate
at w hich step locko u t condition
occ u rs.
No PILOT flame
UV flame sensor indicating presence of flame before
ignition. Flame indicator light present? Is there 5VDC
on UV flame amplifier?
Separate spark w ire and UV scan-
ner w ires.
Replace UV flame sensor, UV
flame amplifier or b
u rn control.
No spark
Check w iring from b u rner control to
ignition transformer.
Check high tension
w ire to spark
pl u g.
Replace ignition transformer.
No gas
Open man u al gas sh u t off v al v es.
Check w iring from b u rner control to
pilot gas v al v e.
Verify inlet gas press u re.
Adj u st pilot gas press u re.
Replace pilot gas v al v e.
Check b u rner pilot opening for
obstr u ction.
Pilot flame does not stay lit
Improper pilot gas press u re Adj u st pilot gas press u re.
UV flame scanner does not dedect flame, Is there
5VDC on UV flame amplifier? Replace UV scanner
Replace UV flame amplifier
UV flame scanner dirty Clean UV scanner