2
3
3)
Install a 0 to 10” W.C. gas pressure gauge or a manometer in the pilot test tee fitting. Plug an
appropriate flame signal meter into the flame safeguard control.
4)
Disconnect the high tension ignition lead-wire at the ignition transformer secondary terminal.
Either hold onto the insulated portion or let the free ignition wire hang loose, so that it is not able
to come into contact with the bare ignition terminal on the transformer.
5)
Start the burner and let it go through the pre-purge period. As soon as the pilot ignition circuit is
energized (listen for the sound of the solenoid valve opening or watch the pilot gas pressure
gauge), let about 3 or 4 seconds lapse and then CAREFULLY (the ignition transformer is putting
out 6000 volts) touch the ignition leadwire to the transformer terminal secondary. If the pilot
fuel/air mixture and ignition electrode are adjusted correctly, the pilot will light instantly and the
flame signal reading will be steady and of the correct value. If the pilot does not light instantly,
then readjust the pilot gas pressure and/or the air dampers and/or the ignition electrode setting
according to the information provided in this manual.
6)
Turn the burner off. Re-connect the ignition leadwire to the ignition transformer secondary
terminal. Set the check switch in the flame safeguard control for automatic operation. Re-
connect any wires that have been disconnected to hold the motorized gas valve in the pilot
position. Open the checking gas cock, turn the burner on and verify that the pilot lights and
proves instantly, providing good, smooth ignition of the main gas flame.
7)
If Gas Pilot Flood Test is successful, it is not always a guarantee of correct pilot air/fuel mixture,
but a failure will almost always indicate an excessively rich mixture.
Manufacturer
Model
Minimum*
Maximum
Honeywell
R7800
1.25 DC Volts
5.0 DC Volts
Fireye
E110
10
80
Scanner Signal (U.V. or Infrared)
Flame Safeguard
* Below the minimum signal the Flame Safeguard will lock in failure after 3 sec
Table 4: Acceptable Stable Pilot and/or Main Flame Current Readings
5
5
.
.
4
4
T
T
r
r
o
o
u
u
b
b
l
l
e
e
S
S
h
h
o
o
o
o
t
t
i
i
n
n
g
g
S
S
u
u
g
g
g
g
e
e
s
s
t
t
i
i
o
o
n
n
s
s
G
G
a
a
s
s
,
,
O
O
i
i
l
l
o
o
r
r
G
G
a
a
s
s
/
/
O
O
i
i
l
l
B
B
u
u
r
r
n
n
e
e
r
r
:
:
g
g
e
e
n
n
e
e
r
r
a
a
l
l
5.4.1 Burner Fails to Start
1)
Defective On/Off or fuel transfer switch: replace.
2)
Control circuit has an open control contact. Check limits, low water cutoff, proof of closure switch
and others as applicable.
3)
Bad fuse or switch open on in-coming power source. Correct as required.
4)
Motor overloads tripped. Reset and correct cause for trip out.
5)
Flame safeguard control safety switch tripped out. Reset and determine cause for apparent
flame failure.
6)
Loose connections or faulty wiring. Tighten all terminal screws and consult wiring diagram
furnished with the burner.
7)
Flame safeguard control starting circuit blocked due to flame relay being energized. Possible
defective scanner: replace. Possible defective amplifier: replace. Scanner actually sighting
flame due to leaking fuel valve: correct unwanted flame cause. Defective flame safeguard
control: replace.
8)
Defective blower motor. Repair or replace.
5.4.2 Occasional Lockouts For No Apparent Reason
Summary of Contents for UCM-1000
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