Install Instructions

28
Table 10: Gas Flow Rate in Cubic Feet per Hour
3. Main burners and pilot burner will extinguish and
blower stop when water level drops below low
water cut-off probe. Verify limit, thermostat or other
controls have not shut off boiler.
4. Adjust thermostat to lowest setting. Refill boiler.
O. Check limit (Combination Control).
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 rating label
located on front of boiler. Adjust gas valve pressure
regulator as necessary (turn adjustment screw
counterclockwise to decrease manifold pressure, or
clockwise to increase manifold pressure). If pressure
cannot be attained, check gas valve inlet pressure. If
less than minimum indicated on boiler’s rating label,
contact gas supplier for assistance.
3. Clock gas meter for at least 30 seconds. Use Table
10 to determine gas flow rate in Cubic Feet per
Hour.
4. Determine Input Rate. Multiply gas flow rate by gas
heating value.
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.
5. Compare measured input rate to input rate stated on
rating plate.
a. Boiler must not be over fired. Reduce input rate
by decreasing manifold pressure. Do not reduce
more than 0.3 inch w.c. If boiler is still over-
fired, contact your New Yorker distributor for
replacement Gas Orifice.
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
Service Section.
ii. Remove gas orifices. Drill one (1) drill size
larger (drill size is stamped on orifice, or see
Repair Parts Section).
iii. Reinstall gas orifices and main burners.
Measure input rate.
6. Recheck Main Burner Flame.
7. Return other gas-fired appliances to previous
conditions of use.
Q. 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