67
Table 12: Input Rate
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 IX: Service.
ii. Remove gas orifices. Drill one (1) drill size
larger (drill size is stamped on orifice, or
see Key No. 4E).
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.
N. Adjust gas input rate to boiler. LP/Propane.
1. Set thermostat to highest setting.
2. Adjust tank regulator for gas valve inlet pressure of
13.5 inches w.c. or less.
3. Gas valve has step opening regulator which initially
opens to 1.4 or 2.5 inch w.c. and steps to full
pressure after approximately 30 seconds. Check
manifold pressure after step has occurred. Adjust
gas valve pressure regulator as necessary for 10.0
inches w.c. (turn adjustment screw
counterclockwise to decrease manifold pressure, or
clockwise to increase manifold pressure). If 10.0
inches w.c. can not be attained, check gas valve
inlet pressure. If less than 11.0 inches w.c., contact
gas supplier for assistance.
O. Clean Heating System
Oil, grease, and other foreign materials which
accumulate in new hot water boilers and a new or
reworked system should be boiled out, and then
thoroughly flushed. A qualified water treatment
chemical specialist should be consulted for
recommendations regarding appropriate chemical
compounds and concentrations which are compatible
with local environmental regulations.
P. Check Damper Operation - If boiler is equipped with
vent damper, vent damper must be in open position
when boiler main burners are operating. Start boiler,
refer to instructions on damper to determine if damper
is in full open position.
Q. Install Front Removable Panel.
1. Engage top flange (longer of 2 flanges) behind
Upper Front Panel.
2. Swing lower portion of door toward boiler.
3. Lower door to engage bottom flange behind Lower
Front Tie Bar.
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R. Combustion Chamber Burn-Off
1. The mineral wool combustion chamber panels
contain a cornstarch based binder that must be
burned out at installation to prevent odors during
subsequent boiler operation.
2. Ventilate the boiler room, set the high limit to its
maximum setting, set the thermostat to call for
heat.
3. Allow the boiler to fire for at least an hour or until
the odor from the cornstarch has dissipated.
4. Return the high limit and thermostat to their
desired settings.
S. Review User's Information Manual and system
operation with owner or operator.
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