BKI LGF Installation And Operation Manual page 50

SV9401/SV9402/SV9403, SV9501/SV9502/SV9503, SV9601/SV9602 SMARTVALVE™ SYSTEM CONTROLS
5. If the desired outlet pressure or flow rate cannot be
achieved by adjusting the ignition system control,
check the ignition system control inlet pressure
using a manometer at the inlet pressure tap of the
ignition system control. If the inlet pressure is in the
nominal range (Tables 8A and 8B), replace the
ignition system control. Otherwise, take the
necessary steps to provide proper gas pressure to
the control.
NOTE: If the burner firing rate is above 85,000 Btuh on
SV9401/SV9402/SV9403 or 150,000 Btuh for
SV9501/SV9502/SV9503 models (see Table 2
for SV9601/SV9602 capacities), it may not be
possible to deliver the desired outlet pressure.
This is an application issue, not a control failure.
Take whatever steps are required to correct the
situation.
Step-Opening (P) Pressure Regulator
Models
Step-opening models require you to check and adjust the
full-rate pressure first and then check the step pressure.
The step pressure is not field-adjustable.
1. Carefully check the main burner lightoff to make
sure the burner lights smoothly and all the ports
remain lit.
2. Check the manifold pressure listed on the
appliance nameplate. The ignition system control
full rate outlet pressure should match this rating.
3. With the main burner operating, check the ignition
system control flow using the meter clocking
method or check pressure using a manometer
connected to the output pressure tap on the
ignition system control.
Model Type Type of Gas
Standard Slow NAT
LP
Step NAT
LP
Convertible NAT
LP
Model Type Type of Gas
Standard Slow NAT
LP
Step NAT
LP
Convertible NAT
LP
Table 8. Pressure Regulator Specification Pressures (in. wc).
Nominal Inlet
Pressure
Range
5.0 - 7.0
12.0 - 14.0
5.0 - 7.0
12.0 - 14.0
5.0 - 7.0
12.0 - 14.0
Table 9. Pressure Regulator Specification Pressures (kPa).
Nominal Inlet
Pressure
Range
1.2 - 1.7
2.9 - 3.9
1.2 - 1.7
2.90 - 3.9
1.2 - 1.7
2.9 - 3.9
4. Adjust the pressure regulator (if necessary) to
match the appliance rating. See Tables 8 and 9 for
factory set nominal outlet pressure and adjustment
range.
a. Remove the pressure regulator adjustment cap
screw.
b. Using a screwdriver, turn the inner adjustment
screw clockwise to increase or counterclock-
wise to decrease the gas pressure to the
burner.
c. Replace the cap screw and tighten firmly to
prevent gas leakage.
5. If the desired outlet pressure or flow rate cannot be
achieved by adjusting the ignition system control,
check the ignition system control inlet pressure
using a manometer at the inlet pressure tap of the
ignition system control. If the inlet pressure is in the
nominal range (Tables 8A and 8B), replace the
ignition system control. Otherwise, take the
necessary steps to provide proper gas pressure to
the control.
6. Carefully check the burner lightoff at step pressure
to make sure the burner lights smoothly, without
flashback to the orifice. Make sure all ports remain
lit.
7. Cycle the burner several times, allowing at least 60
seconds between cycles for the regulator to
resume the step function.
8. Repeat steps 6 and 7 after allowing the burner to
cool.
9. Readjust the full rate outlet pressure (if necessary)
to improve lightoff characteristics.
Convertible (R) Models
Models with convertible (NAT/LP) regulators, used for
mobile home applications, are not field-adjustable. Do
not attempt to adjust outlet pressure on these controls.
Use the instructions in this manual for changing between
LP and natural gas.
Factory Set Nominal Outlet
Pressure
Step Full Rate
— 3.5
— 10.0
0.9 3.5
2.2 10.0
— 3.5
— 10.0
Factory Set Nominal Outlet
Pressure
Step Full Rate
— 0.9
— 2.5
0.2 0.9
0.5 2,5
— 0.9
— 2.5
11
Setting Range
Step Full Rate
— 3 - 5
— 8 - 12
None 3 - 5
None 8 - 12
None None
None None
Setting Range
Step Full Rate
— 0.7 - 1.2
— 2.0 - 3.0
None 0.7 - 1.2
None 2.0 - 3.0
None None
None None
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