Excelsior DK4EXA075, Установка, эксплуатация и обслуживание

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OPERATING THE BOILER - SYSTEM START-UP
D
ue to the potential hazard of line voltage,
only a trained, experienced service technician
should perform the following safety checks.
This control contains no field serviceable parts.
do not attempt to take it apart. Replace entire
control if operation is not as described.
CAUTION
!
CHeCk oiL PRiMARy ConTRoLs. 5.
PRELIMINARY STEPS A.
Check wiring connections and power supply. I.
Make sure power is on to the controls. II.
Make sure limit control is closed. III.
Check contacts between igniter and the electrodes. IV.
Check the oil pump pressure. V.
Check the piping to the oil tank. VI.
Check the oil nozzle, oil supply, and oil filter.
VII.
CHECK SAFETY FEATURES - SAFE START B.
Place a jumper across cad cell terminals. I.
Follow procedure to turn on burner. Burner must not II.
start, indicator light turns on and control remains in
idle Mode.
Remove jumper. III.
siMuLATe iGniTion oR FLAMe FAiLuRe
C. :
Follow procedure to turn on burner. I.
Close hand valve in oil supply line. II.
Failure occurs, device enters Recycle Mode. Indica- III.
tor light flashes 2 seconds on, 2 seconds off.
Device tries to restart system after approximately 60 IV.
seconds.
After third Recycle Mode trial, safety switch locks V.
out within safety switch timing indicated on label
and control enters Restricted Mode. Indicator light
flashes 1/2 second on, 1/2 Second off. Ignition and
motor stop and oil valves closes.
To reset from Restricted Mode: Press and hold the VI.
reset button for 30 seconds. When the LED flashes
twice, the device has reset.
Cad Cell Check : see D. Figure #23 .
Perform cad cell resistance check as outlined in I.
control feature. If resistance is below 1600 OHMS
and burner runs beyond safety cut-out time, cad cell
is good.
If safety switch shuts down burner and resistance II.
is above 1600 OHMS, turn on power to the boiler.
Access cad cell under igniter, clean face of cad cell
and see that cell is securely in socket. Check gasket
around perimeter of igniter lid for proper seal. If gas-
ket is missing or damaged, replace gasket. Room
light can affect cad cell resistance. Reset safety
switch.
Turn off power. If burner starts and runs beyond III.
safety switch cut-off time, cell is good. If not, install
new cell.
Power Failure Check: After flame is established,
E.
turn the power off to the control / burner. The burner
should shut down safely. When power is restored, a
normal ignition sequence should be started.
CHeCk HiGH TeMPeRATuRe LiMiT ConTRoL 6.
-
Jumper Thermostat Terminals. Allow burner to oper-
ate until shut down by limit. Installation is not consid-
ered complete until this check has been made.
Jumper must be removed after this check!
WARNING
!
Figure #23
CAD cell location