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Table 14: Pilot Burner Location
3. Start boiler and read Pressure on Manometer
when boiler water temperature reaches operating
temperature. Refer to Table 15 for minimum
readings.
NOTE: If switch drops-out before boiler reaches
temperature or if pressure differential readings are
below minimums shown in Table 15, check for
cracks in hose or contact your nearest Burnham
representative.
4. Stop boiler, remove manometer and reconnect hoses
to differential pressure switch. See Figures 28 and
31.
Figure 31: Differential Pressure Measurement
Table 15: Differential Pressure Switch Settings
Boiler Model Main Burner with Pilot Bracket Pilot Burner Located Between Main Burners *
PVG-3 2 2 & 3
PVG-4 3 3 & 4
PVG-5 4 4 & 5
PVG-6 5 5 & 6
PVG-7 6 6 & 7
PVG-8 7 7 & 8
PVG-9 8 8 & 9
* Main burners numbered left to right as viewed from front of boiler.
Boiler Model
Minimum Differential Pressure
Sea Level to 4,999 Ft. 5,000 - 10,000 Ft. Elevation
PVG-3 1.32” w.c. .80” w.c.
PVG-4 1.17” w.c. .65” w.c.
PVG-5 1.17” w.c. .65” w.c.
PVG-6 .88” w.c. .35” w.c.
PVG-7 .80” w.c. .30” w.c.
PVG-8 .88” w.c. .35” w.c.
PVG-9 .88” w.c. .35” w.c.