BASO BGQ15HAA-1 - Manual (Page 6)

6 BGQ15HAA-1 Retrofit Spark Ignition System Installation Instructions
Setup and Adjustments
Electrical and Mechanical Checkout Procedure
After the BGQ15HAA-1 installation is complete, perform
the following procedures to ensure the installation is
correct. While performing the following procedure, keep
the high voltage cable and the sensing probe cable away
from hot surfaces.
1. Measure the output current in the probe circuit using
a DC microammeter. Connect the microammeter
leads between the sensing probe cable and Terminal
8 on the ignition control. Connect the positive lead to
Terminal 8 and the negative lead to the sensing
probe cable (Figure 5).
Digital Multimeter
Flame
Sensor
Positive
Lead
Negative
Lead
Flame
Sensor
Cable
MV
/PV
(C
OM
)
P
V
GND
BURNER
GN
D
2 4 V
S E N S E
S PAR
K
INTERNAL
2
3
45
6
8
91
0
TH 7
MV 1
Us
e
jum
pe
r
pl ug
s
u pp
lie
d
wi
th
c
o n tro
l.
Figure 5: Wiring Diagram for Flame Sensing Current
Measurement
2. Remove the main valve lead from Terminal 1 on the
ignition control. Attach the on/off toggle switch
between the ungrounded post of the transformer and
Terminal 7 on the ignition control. The toggle switch
serves as the thermostat for testing procedures.
Make sure the thermostat contacts are open.
3. Open the main manual shutoff valve to turn on the
gas supply.
4. Restore power to the furnace or boiler and flip the
toggle switch to the On or closed position. The pilot
valve opens and a spark jumps the spark gap at the
pilot.
5. Test for leaks at the pilot tubing connections with a
soap solution. In a few seconds, the spark lights the
pilot after the air is bled from the pilot gas line.
Note: Once the pilot flame is lit, the microammeter
shows a reading from the flame sensing probe. The
current reading should be at least 0.15 microampere.
If the reading is less than 0.15 microampere, turn off
the electrical power and adjust the pilot assembly by
adding spacers between the pilot bracket and the
sensing probe assembly. No more than 1/2 in. of the
flame sensor tip should be in the pilot flame. If this
does not correct the current reading, it may be
necessary to increase the pilot burner orifice size.
Recheck until the reading is satisfactory.
6. Flip the toggle switch to the Off or open position.
7. Reconnect the main valve lead to Terminal 1 on the
ignition control.
8. Flip the toggle switch to the On or closed position.
The pilot should light and immediately thereafter, the
main burner should light.
9. Check the outlet pressure reading by removing the
pressure tap plug and connecting a manometer.
Compare it with the furnace or boiler specifications. It
may be necessary to adjust the pressure regulator to
the rating indicated (see the Regulator Adjustment
section).
Turndown Test Procedure
With the toggle switch still connected, perform the
following turndown test to assure main burner ignition
under conditions that permits the main valve to open.
1.
Slowly close the manual shutoff valve until the pilot
flame is just sufficient to maintain operation of the
main burner.
2. Cycle the main burner off and on with the toggle
switch. Perform this test with the furnace or boiler
burner cold and hot.
3. If the furnace or boiler cycles without igniting the
main burner in four seconds, ensure the pilot is
properly located and correct for the application.
4. Completely open the main manual shutoff valve.
5. If unstable burner lighting occurs, causing the ignition
control to chatter on and off during startup, install the
flame rectification extension as follows.
a.
Place the sensor probe extension and bushing
onto the flame sensing probe.
b. Position the extension over the main burner so it
extends into the flame.
c. Secure the extension in place by tightening the
extension probe into the bushing.
Note: The sensor probe extension detects the main
burner flame and the BG1600M ignition control
allows continued operation until a stabilized pilot is
maintained.