Power Failure / Back-Up - Harman PC45 Installation & Operating Manual

Minimizing Smoke During Loss of Power Using Battery Back-up
Harman® strongly recommends installing battery back-up to minimize entry of smoke into the room
in the event of power loss.
Your pellet/biomass burning appliance relies on a combustion blower to remove exhaust. A power failure will
cause the combustion blower to stop. This may lead to exhaust seeping into the room. Vertical rise in the
venting may provide natural draft. It is, however, no guarantee against leakage.
There are two Harman® approved battery back-up options for your appliance:
Uninterruptible Power Supply (UPS) UPS battery back-ups are available online or at computer and office
equipment stores. Your Harman® appliance with Rev E or later software available beginning in November
2010 may be plugged directly into a Harman® approved UPS:
• The APC (American Power Conversion) model #BX1500G and the TrippLite OMNIVS1500 are
tested and approved. Other brands or models may not be compatible.
When power is lost, a fully charged UPS will power a safe, combustion blower only shut-down. Your
appliance will pulse the blower every few seconds to clear exhaust until the fire is out. NOTE: The UPS
provides safe shut-down only. It is not intended for continued operation.
Your appliance will recognize when power is restored. What happens depends on ESP temperature and
whether it is equipped with automatic ignition:
• In "Automatic" setting, units equipped with automatic ignition will respond to the set point and
ESP temperature and resume normal operation.
• In "Manual" setting or for units without automatic ignition:
• If the ESP is cool, the appliance will remain shut down.
• If the fire is out and the ESP is still warm, the feeder may restart. Since the fire is out, the ESP
temperature will not rise. The unit will then shut-down, and may flash a six-blink status error. (See
ESP error codes)
• If the fire is still burning, it will resume normal operation.
Contact your dealer if you have questions about UPS compatibility with your appliance.
CAUTION! Always keep appliance doors and hopper lid closed and latched during operation and
during power failures to minimize risk of smoke or burn-back.
CAUTION! Use only Harman® approved battery back-up devices. Other products may not operate
properly, can create unsafe conditions or damage your appliance.
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