Burnham Revolution - Adjust Gas Input Rate

73
Table 10: Gas Flow Rate in Cubic Feet
Per Hour
K. Check main burner ame. See Figures 47A and 47B.
Flameshouldhaveclearlydenedinnerconewithno
yellow tipping. Orange-yellow streaks should not be
confused with true yellow tipping.
L. Check thermostat operation. Raise and lower
temperature setting to start and stop boiler operation.
M. Check ignition control module shut-off. Disconnect
pilot lead wires from gas valve. If burners do not
shutdown, determine cause of malfunction. Replace
necessary items and check operation.
N. Check low water cutoff (if so equipped).
1. Adjust thermostat to highest setting.
2. With boiler operating, open drain valve and slowly
drain boiler.
3. Main burners and pilot burner will extinguish and
blower will stop when water level drops below low
water cutoff probe. Verify limit, thermostat or other
controls have not shut off boiler.
4. Adjustthermostattolowestsetting.Rellboiler.
O. Check limit.
1. Adjust thermostat to highest setting.
2. Observe temperature gauge. When temperature is
indicated, adjust limit to setting below observed
temperature. Main burners and pilot burner should
extinguish, and blower should stop.
3. Adjust limit to setting above observed temperature.
Ignition sequence should begin.
4. Adjust thermostat to lowest setting. Adjust limit to
desired setting.
P. Adjust gas input rate to boiler.
1. Adjust thermostat to highest setting.
2. Check manifold gas pressure. See Table 5 or rating
label located in the boiler’s vestibule compartment.
Adjust gas valve pressure regulator as necessary
(turn adjustment screw counterclockwise to decrease
manifold pressure, or clockwise to increase mani-
fold pressure). If pressure cannot be attained, check
gas valve inlet pressure. If less than minimum
indicated in Table 5 or boiler’s rating label, contact
gas supplier for assistance.
3. Clock gas meter for at least 30 seconds. Use Table
10todeterminegasowrateinCubicFeetper
Hour.
WARNING
Failure to properly adjust gas input rate will result
in over ring or under ring of the appliance.
Improper and unsafe boiler operation may result.
4. DetermineInputRate.Multiplygasowratebygas
heating value.
5.
Compare measured input rate to input rate stated on
rating plate.
a.
Boilermustnotbeoverred.Reduceinputrate
by decreasing manifold pressure. Do not reduce
morethan0.3inchw.c.Ifboilerisstilloverred,
contact your Burnham distributor or Regional
OfceforreplacementGasOrice.
b. Increase input rate if less than 98% of rating
plate input. Increase manifold gas pressure no
more than 0.3 inch w.c. If measured input rate is
still less than 98% of rated input:
i. Remove Main Burners per procedure in
Section X: Service.
ii. Removegasorices.Drillone(1)drillsize
larger(drillsizeisstampedonorice,orsee
Section XI: Repair Parts).
iii. Reinstallgasoricesandmainburners.
Measure input rate.
6. Recheck Main Burner Flame.
7. Returnothergas-redappliancestoprevious
conditions of use.
Q. Conrm operation of the variable speed boiler
circulator.
1. Initiate a call for heat and observe the boiler’s
temperature gauge and the VS3000 “% on” LED.
Refer to Sequence of Operation, Figure 49.
2. RefertoFigure50foraowdiagramoftheboiler
circulator piping.
R. Review User’s Information Manual and system
operation with owner or operator.
Seconds
for One
Revolution
Size of Gas Meter Dial
One-Half
Cu. Ft.
One
Cu. Ft.
Two
Cu. Ft.
30 60 120 240
32 56 113 225
34 53 106 212
36 50 100 200
38 47 95 189
40 45 90 180
42 43 86 172
44 41 82 164
46 39 78 157
48 37 75 150
50 36 72 144
52 35 69 138
54 33 67 133
56 32 64 129
58 31 62 124
60 30 60 120