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operaTion
Startup Procedure
1
Starting the Boiler
1
Apply power to the boiler via the service switch
2
Follow the operating instructions on page 95
3
If this is the first time powering the boiler, refer to
the Control section starting on page 81
2
4
Complete the setup Wizard The Wizard is
recommended for all boilers because it guides the
user through setups for multiple applications
5
Ensure all connected sensors are detected and the
correct boiler model is identified. If not, determine
the cause and correct before proceeding
3
6
Check water, vent, air and gas piping again for
leaks If any leaks are found, shut down the boiler
and repair immediately
Troubleshooting Startup Issues
4
1
Check for loose connections, a blown fuse, or if
the service switch is in the off position.
2
Is gas turned on at the meter and at the boiler?
3
Are control settings correct for the application?
4
Is the warm weather shutdown activated?
5
Are thermostats set below room temperature?
6
Are external limit controls open (if used)? Is the
5
boiler water temperature above 200°F?
7
Are the closure switch contacts open?
8
Is incoming gas pressure within the limits of the
minimum and maximum values given on page 61?
9
If none of the above corrects the issue, refer to the
Troubleshooting section starting on page 117
6
Check Flame and Combustion
1
Ensure that all load devices, such as control
valves, radiators, and air handling units, are in
operation to prevent the boiler from cycling off
during adjustment The load devices must be able
7
to shed or dump the heat created by the boiler
2
Navigate to the Manual Test Mode screen under
<Diagnostics>
3
Initiate a call for heat on a thermostat input
High Fire Check:
8
4
Make sure the maximum firing rate is set to the
maximum given in Table 18, page 115 Adjust as
necessary
96
svf
series
500/600
Table 16
Acceptable combustion values
Fuel
% CO
+ 0 4
NG
9 50
- 1 0
LP
10 50 ± 0 5
• Values above are with the boiler front door removed Values will
increase about 0 2% once the door is reinstalled
• The low fire CO
must be lower than the high fire CO
2
• For NG, the low fire CO
• For LP, the low fire CO
• Values above are for altitudes up to 2,000 ft For higher altitudes,
CO
may be slightly lower and CO slightly higher Refer to Table 18,
2
page 115 for more information
• Reinstall the boiler door after completing service
5
While still in Manual Test Mode, and with FORCE
RATE highlighted, select <EDIT> Using the up
and down arrows, select <HIGH> and press
<SAVE> Refer to Figure 62, page 85
6
Look at the flame through the flame inspection
window. The high fire flame should be blue and
stable The burner surface should be covered
with orange dots
7
Remove the test port cap from the vent flue
adapter Insert a combustion test probe For test
port location, see Figure 68, page 93
8
Test for CO
comply with Table 16 If results are acceptable,
proceed to the next step If not, follow the
instructions under the Gas Valve Adjustment
section starting on page 97 to set the positions
of the throttle and offset regulating screws.
9
To check the natural gas input (as needed):
a Turn off other appliances.
b Operate the boiler for 10 minutes
c At the natural gas meter, measure time in
seconds required to use one cubic foot of gas
d Calculate the gas input:
3600 x 1000
number of seconds from step c
e Btuh calculated should approximate input rating
on boiler rating label
boiler manual
1
High Fire
Low Fire
CO ppm
% CO
2
+ 0 5
< 100
9 00
- 1 0
< 150
10 00 ± 0 5
must be 0.40% lower than the high fire CO
2
must be 0.25% lower than the high fire CO
2
and CO The CO
values must
2
2
= Btuh
CO ppm
2
< 50
< 50
values
2
2
2
550-100-273/0523
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