Lochinvar 000 - 500 User Manual

This heating boiler is design certified for use with the
automatic vent damper (FIG. 15) part number printed on
the boiler’s rating plate.  A vent damper must be
installed on all residential heating boilers with inputs of
less than 300,000 Btu/hr to comply with minimum
efficiency requirements.  A vent damper is factory
supplied with residential heating boilers with inputs of
45,000 thru 260,000 Btu/hr.  A vent damper is optional
on all heating boilers above 260,000 Btu/hr.  A vent
damper is available as an option on all water heaters.

The vent damper is a useful tool for saving energy when
installed inside the living space where air can
cir cu late freely around the appliance.  The vent damper
will not save as much, if any, energy if it is installed in
locations such as:

-Unheated garage
-Attic
-Crawlspace
-Mechanical room that is vented outdoors

For installation and maintenance on the vent damper, refer
to the instructions supplied with the vent damper.

Residential heating boilers with inputs of less than
300,000 Btu/hr must have the vent damper prop 

er 

ly

installed and the vent damper wire harness plugged into
the ter mi nal block on the side of the control panel to
allow the boiler to function.  Larger input heating
boilers and water heaters will have a jumper plug
installed in the ter 

mi 

nal block to allow operation

without a damper. Remove the jumper plug from the
terminal block to connect an optional vent damper wire
harness.  The jumper plug MUST be in place if an
optional vent damper is not used on water heaters and
larger input heating boilers.

Install the vent damper to service only the single
ap 

pli 

ance for which it is intended.  If improperly

installed, a hazardous condition such as an ex plo sion or
carbon monoxide poisoning could result.

The damper position indicator must be in a visible
lo ca tion with access for service following in stal la tion.
The damper must be in an open position when appliance
main burners are operating.

The part number for the automatic vent damper
required on this heating boiler is printed on the rating
plate.  Vent damper regulations are design certified per
the latest edition of  ANSI Z21.66.

Do not install the vent damper within 6" (152 mm)
of combustible materials.

 CAUTION

The vent damper must be installed directly on the
flue outlet located on the top of the draft hood (see
Figure 15).  Do not alter the wire har ness sup plied
with the vent damper.  Follow the instructions
supplied with the vent damper.

 WARNING

An appliance which is shut down or will not
operate may experience freezing due to con vec tive
air flow down the flue pipe connected to the unit.
Proper freeze protection must be pro 

vid 

ed, see

Freeze  Pro tec tion. 

 CAUTION