Prior To Start-Up; Commissioning; Pre-Ignition Checks; Test Ignition Safety Shutoff - IBC DC Series Installation And Operating Instructions Manual

DANGER
Fill trap with water before
boiler / water heater is first
fired to prevent exhaust
fumes from entering room.
Never operate the boiler /
water heater unless the trap is
filled with water.
Failure to comply will result
in severe personal injury or
death.
DANGER
Making adjustments to
the IBC gas valve without
a properly calibrated gas
combustion analyzer and by
persons who are not trained
and experienced in its use
is forbidden. Failure to use
an analyzer can result in an
immediate hazard.
3-2
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160

3.2 PRIOR TO START-UP

3.2.1 Pre-Ignition Checks

1. Fill condensation trap. Ensure venting system is complete and seal tested.
Confirm any common venting system at the installation site is isolated and
independent of the DC boiler / water heater, that any holes left from removal
of a previous boiler have been sealed, and that any resizing of the old flue
has been done.
2. Check water piping system is fully flushed and charged, and that all air has
been discharged through loosened bleed caps. Use a minimum water pressure
of 12 psig and confirm pressure relief valve is installed and safely drained.
3. Check to see that adequate gas pressure is present at the inlet gas supply
test port. With the boiler / water heater gas valve shut off, open the test port
(using a small (1/8" or 3 mm) flat screwdriver, open the test port by turning its
center-screw 1 full turn counterclockwise. Connect a manometer and open
the gas control valve. Requirements are minimum 5" w.c and maximum 14"
w.c. Check to ensure no gas leaks.
4. Perform a final check of electrical wiring and provide power to the boiler /
water heater to initialize operation.

3.2.2 Test Ignition Safety Shutoff

With the boiler / water heater in operation, test the ignition system safety shutoff
device by shutting the manual gas valve immediately outside the boiler / water
heater case. Ensure boiler / water heater has shut off and the appropriate Error
information is displayed on the Main Display screen. To restart boiler, reset power.
3.3

COMMISSIONING

The DC Series modulating boilers / water heaters are factory calibrated to operate
with natural gas at sea level. The Low Fire (Zero Offset) screw is not to be
adjusted in the field. The High fire (Gas : Air Ratio Adjustment) screw may have
to be adjusted to attain optimum combustion results if required, however, no
mixture adjustment shall be performed unless done by a qualified technician
using properly functioning and calibrated combustion analyzing equipment.
This boiler / water heater model can burn either Natural gas or Propane if
equipped with the correct specified orifice. Examine the rating plate of the
boiler / water heater to ensure it is configured for the fuel you are using. If
the boiler / water heater is to be converted from Natural Gas to Propane or
from Propane to Natural Gas a Fuel Conversion Kit must be installed. The
correct Fuel Conversion Kit part number can be found in Table 10.
MODEL NUMBER
DC 15-95
DC 15-96
DC 20-125
DC 33-160
Table 10: Fuel Conversion Kits
NATURAL GAS
TO PROPANE
P-747
P-747
P-737
P-702
INSTALLATION AND OPERATION INSTRUCTIONS
PROPANE TO
NATURAL GAS
P-748
P-748
P-738
P-703