14
£
4.
Observe the pilot flame signal on the test meter. If the average voltage is below normal, re-adjust
the pilot flame or re-align the detector.
5.
During the pilot flame test and adjustment period, if flame is not detected, the control will lock-
out. To re-establish the pilot flame trial-for-ignition (TFI) manually reset the lockout switch, and
re-purge the boiler.
6.
When UV flame detection is used, a test is required to verify that
UV radiation from the ignition spark is not being detected. To
accomplish this, manually shut off both pilot and main fuels.
Initiate a normal start-up and when the TFI light comes on,
observe the test meter which should read no more than 1 volt.
If more than 1 volt is observed, realign the UV scanner, and/or
shield the spark from the scanner’s view. Programmers 71D80,
71D81, 71D90 provide ignition spark cutoff prior to pilot
flame proving (when the ignition transformer is connected to
Terminal X), to assist with installations where UV radiation
from spark ignition is difficult to eliminate from the view of the
UV scanner.
7.
With all methods of flame detection, check pilot flame failure
response by manually shutting off the pilot fuel and then ini-
tiate a normal start-up. With no pilot flame present, the control
will de-energize the pilot assembly at the end of the trial-for-
ignition interval, and the control will lockout. The check-run
switch must be in the “run” position for this test.
FIGURE 3.
TYPICAL WIRING ARRANGEMENT FOR PILOT IGNITED BURNER
INTERMITTENT
PILOT
VALVE(S) †
Disconnect
Means And
Overload
Protection
Required
Not Used
Burner Motor
Control Circuit
Ignition And Fuel Valve Control Circuit
Lockout
Alarm Circuit
Plug In
Flame Amplifier
Flame
Rod*
FIREYE
WIRING BASE
TERMINALS
IMPORTANT; A Good
Earth Ground is
Essential
120 VOLT
50/60 Hz
H
Note: When A Flame Rod Is
Used, Jumper S2 To The Ter-
minal Board Screw directly
above green grounding screw
on the wiring base
NOT USED
FLAME
SCANNER
IR or UV
LOW FIRE
START
INT.
RUNNING
INTERLOCK
FUEL VALVE
PROOF OF
CLOSURE
LIMIT OPERATING
SWITCHES
Burner
Switch
RED
BLACK
45UV5-1009
Caution: All safety limit switches should be approved as
limit controls and should be wired directly in the circuit of
the Flame Safeguard control. The use of electronic switch-
es to close interlock circuits may cause erratic operation.
S2
S1
A
8
7
6
5
13
12
X
P
D
M
3
L2
L1
11
10
L1
L2
S1
S2
S2
S1
L2
L1
BURNER/
BLOWER
MOTOR
S1
S2
Not Used
WIRING ARRANGEMENT FOR SPARK IGNITED OIL BURNER
IGNITION
TRANSFORMER
IGNITION
TRANSFORMER
PRIMARY
MAIN OIL VALVE
SECONDARY
MAIL OIL VALVE
7
6
X
N
*
INTERRUPTED
PILOT
VALVE(S)
MAIN
FUEL
VALVE(S)
LOCKOUT
ALARM
† Intermittent pilot not permitted on oil burners
Summary of Contents for D30 Series
Page 23: ...23...
