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12. VENT RESIZING INSTRUCTIONS
When an existing furnace is removed from a venting
system servicing other appliances, the venting system
is likely to be too large to properly vent the remaining
attached appliances.
The following steps shall be followed with each of
the appliances remaining connected to the common
venting system, placed in operation one at a time
while the other appliances remaining connected to the
common venting system are not in operation.
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National
Fuel Gas code, ANSI Z223.1 or the CAN/CGA
B149 Installation Codes and these instructions.
Determine that there is no blockage or restriction,
leakage, corrosion and other deficiencies which
could cause an unsafe condition.
3. In so far as is practical, close all building doors and
windows and all doors between the space in which
the appliance(s) connected to the venting system
are located and other spaces of the building. Turn
on clothes dryers and any appliances not connected
to the venting system. Turn on any exhaust fans,
such as range hoods and bathroom exhausts, so they
will operate at maximum speed. Do not operate a
summer exhaust fan. Close fireplace dampers.
4. Follow the lighting instructions. Place the
appliance being inspected in operation. Adjust
thermostat so appliance shall operate continuously.
5. Test for draft hood equipped appliance spillage at
the draft hood relief opening after 5 minutes of
main burner operation. Use the flame of a match
or candle.
6. After it has been determined that each appliance
connected to the venting system properly vents
when tested as outlined above, return doors,
windows, exhaust fans, fireplace dampers and
any other gas-burning appliances to their previous
conditions of use.
7. If improper venting is observed during any of the
above tests, the venting system must be corrected.
13. FRESH AIR INTAKE
All units are built with fresh air inlet slots punched in
the service panel.
If the unit is equipped with a fresh air damper
assembly, the assembly is shipped already attached
to the unit. The damper blade is locked in the
closed position. To allow the damper to operate, the
maximum and minimum blade position stops must be
installed (see Figure 9).
All capacity, efficiency and cost of operation
information as required for Department of Energy
Manual 2100-721B
Page
20 of 54
FIGURE 9
Fresh Air Damper
"Energyguide" Fact Sheets is based upon the fresh
air blank-off plate in place and is recommended for
maximum energy efficiency.
The blank-off plate is available upon request from the
factory and is installed in place of the fresh air damper
shipped with each unit.
One of several other ventilation options may be
installed. Refer to model number and/or supplemental
installation instructions.
14. CONDENSATE DRAIN
A plastic drain hose extends from the drain pan at
the top of the unit down to the unit base. There are
openings in the unit base for the drain hose to pass
through. In the event the drain hose is connected to
a drain system of some type, it must be an open or
vented type system to assure proper drainage.
15. WIRING – MAIN POWER
WARNING
For personal safety, turn off electric power
at service entrance panel before making any
electrical connections. Failure to do so could
result in electric shock or fire.
Refer to unit rating plate for wire sizing information and
maximum fuse or circuit breaker size. Each outdoor
unit is marked with a "Minimum Circuit Ampacity".
This means that the field wiring used must be sized to
carry that amount of current. All models are suitable
only for connection with copper wire. Each unit and/or
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