Prior To Start-Up; Commissioning - IBC VFC 15-150 Installation And Operating Instructions Manual

Inlet gas supply pressure test port
WARNING
Fill trap with water before boiler
is first fired to prevent exhaust
fumes from entering room.
Never operate the boiler unless
the trap is filled with water.
Failure to comply will result in
severe personal injury or death.
Manifold pressure test port
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
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS

3.2 PRIOR TO START-UP

3.2.1 Pre-Ignition Checks
Ensure venting system is complete and seal tested. Confirm any common
1.
venting system at the installation site is isolated and independent of the VFC
boiler, that any holes left from removal of a previous boiler have been sealed,
and that any resizing of the old flue has been done. Fill condensation trap to
full neck height.
Check water piping system is fully flushed and charged, and that all air
2.
has been discharged through loosened bleed caps. Note it is possible to
switch all pumps on/off from the Touch Screen – without a call for heat.
This greatly simplifies system filling and air bleeding (go to Installer Setup,
System Settings, Site Settings, change Manual Pump Purge to "ON". When
complete, return to Off, or this will automatically occur with a call for heat).
Use a minimum water pressure of 12 psig. And confirm pressure relief valve
is installed and safely drained.
Perform a final check of electrical wiring.
3.
Using a manometer, check to see that adequate gas pressure is present
4.
at the inlet gas supply test port. Requirements are minimum 3" w.c and
maximum 14" w.c.
3.2.2 Test Ignition Safety Shutoff
With the boiler in operation, test the ignition system safety shutoff device by shutting
the gas control valve immediately outside the boiler case. Ensure boiler has shut off
and the appropriate Error information is displayed on the Touch Screen. To restart
boiler, reset power or press "Clear Errors" in the Advanced Diagnostics section.

COMMISSIONING

3.3
The VFC modulating boilers are factory calibrated to operate with natural gas (or
propane if so ordered) at sea level. The relevant valve adjustment screws have
been factory sealed using Loctite thread-lock compound, which can be broken
where required. However, no mixture adjustment shall be performed unless
done by a qualified technician using properly functioning combustion
analyzing equipment.
The controller will automatically detect the installations altitude and make the
appropriate adjustments to operate the boiler up to 4,500 feet in elevation without
de-ration. The boiler will automatically de-rate at altitudes above 4,500 feet.
Refer to the IBC Altitude tables for further information.
To verify the proper operation of the gas valve in the field, the following procedure
can be carried out by a qualified technician (see Figure 32).
Turn OFF gas supply to the boiler. With a small (1/8" or 3 mm) flat
1.
screwdriver, open the manifold pressure test port by turning its centre- screw
1 full turn counterclockwise. Attach a manometer between the manifold
pressure test port and the reference line and turn on gas to the appliance.
Static manometer reading should be ideally 7" w.c., for Natural Gas and
11" w.c. for Propane. Minimum and maximum static pressure should be
between 5" and 14" w.c. Monitor pressure throughout the commissioning
INSTALLATION AND OPERATION INSTRUCTIONS