EX 700 - Convert to LP fuel (P-Kit 1201)
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5
Testing and adjusting
Measuring the inlet gas pressure
1. Before performing a combustion test and adjustment, turn off the boiler’s external gas shut-off valve.
2. Remove the inlet gas pressure test port plug with a 3 mm Allen key. Note the fitting has BSP threads.
3. Use the supplied fitting to transition from ⅛" BSP to barbed for connection to a manometer.
4. Attach a manometer to the inlet pressure test port, and turn on gas to appliance.
Static manometer reading should be ideally 7" w.c. for Natural Gas and 11" w.c. for Propane.
Minimum and maximum static pressure should be between 5" and 14" w.c. Monitor pressure
throughout the commissioning (start-up) procedure. Pressure may drop up to 1" to 2" w.c. at
high fire.
5. Before firing the boiler, turn the high fire (gas-air ratio) adjustment screw clockwise ¾ to 1 full turn to
decrease the fuel (leaning the mixture) before firing up the boiler.
6. Before you change the load to manual control, note the load setting.
7. Set the load to manual control, and set the heat-out value to the maximum MBH for the boiler. This load
should be large enough to allow the boiler to operate at high fire for over 10 minutes.
Performing a combustion test
Fuel
High fire
Low fire
CO max PPM
Range %
Target %
Range %
Target %
Natural Gas
9.0 - 10.0
9.5
8.2 - 9.2
8.7
<150
Propane
10.3 - 11.3
10.8
9.3 -10.3
9.8
< 250
Table 2
Combustion test target ranges - CO
2
/ Maximum CO %
1. After the boiler is lit and is at high fire, insert the combustion analyzer test probe into the flue gas test
port. Then adjust the high fire (gas-air ratio) adjustment with a small slot screwdriver according to the
Table for Combustion test target ranges - CO
2
values.
