RGM 465, Mfg No. 175758, Page 37
Replace aquastat
controller.
Adjust
barometric
damper.
Wait 15 minutes.
YES
Has there been
line voltage across Terminals
1 and 2 for at least 15
minutes?
Check
for voltage across 3
and 2. Is voltage
read?
Check for line
voltage across Terminals
15 and 11. Is voltage
read?
Is inlet nozzle
adapter warm to the
touch?
Check for line
voltage across Terminals
17 and 2. Is voltage
read?
Check for line
voltage across Terminals
16 and 2. Is voltage
read?
Check for line
voltage across Terminals
4 and 2. Is voltage
read?
Measure the resistance
across
the F-F terminals on the
ignition controller.
Is the
resistance zero?
Correct
short circuit.
Is the
resistance greater than
1500 ohms?
Clean cell face and
seat firmly into
holder.
Is resistance
greater than 1500
ohms?
Is the overfire
draft correct?
Is the CO2
correct?
Replace the
cad cell.
Adjust for
proper CO2.
Cad cell and ignition
controller are OK.
Is the
boiler temperature
below the aquastat
setting?.
Replace nozzle
low oil
temperature limit.
Check for
line voltage across
"Tan" oil heater wires and
Terminal 11. Is voltage
read?
Check continuity of
300 watt (Sizes 140 & 235);
650 watt (Size 350); or 770 watt (Size
500) element. Is there
sufficient ohms?
Replace oil heater
temperature control
(pre-heater).
Replace oil
heating element
(pre-heater).
Replace oil heater
low temperature
limit (pre-heater).
Check for
line voltage across 14
and 11. Is voltage
read?
Check
for continuity of 30
watt heating elements. Is
continuity read?
Is cold
air discharging from
burner tube?
Verify draft
inducer is
operating properly.
Replace 30 watt
heating elements.
Replace nozzle
temperature
control.
Reset manual oil
limit switch
(pre-heater).
Check
for line voltage
across Terminals 15 and 11.
Is there voltage
read?
Replace manual
high oil limit
(pre-heater).
Is the
boiler full of
water?
Replace
low-water cutoff
control.
Check water
feed system.
Check
for line voltage at the
manual disconnect switch. Is
voltage read?
Replace manual
disconnect
(on/off) switch.
Turn on or correct
supply. Wait 15
minutes for heater to
warm up.
YES
NO
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NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
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YES
NO
NO
YES
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NO
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NO
YES
NO
Chart No. 1 - Thermostat
calling for heat; Burner
motor never attempts to
run.
Turn on the main power to the unit at the
disconnect switch and wait at least 15 min-
utes before proceeding. If GREEN “sys-
tem ready” light is NOT LIT, continue
with the troubleshooting guide below. If
it is “ON” skip to Chart No. 2.
Refer to illustration
on page 36.
Troubleshooting
Continued