When installing the furnace with cooling equipment for
year round operation, the following recommendations
must be followed for series or parallel air flow:
1.
In series flow applications, the coil is mounted after
the furnace in an enclosure in the supply air stream.
The furnace blower is used for both heating and
cooling airflow.
2.
In parallel flow installation, dampers must be provided
to direct air over the furnace heat exchanger when
heat is desired and over the cooling when cooling is
desired. At no time may the evaporator coil be
located on the return air side of the heat exchanger.
IMPORTANT:
The dampers should be adequate to
prevent cooled air from entering the
furnace, and if manually operated, must
be equipped with means to prevent
operation of either the cooling unit or
furnace unless the damper is in the full
cool or full heat position.
The coil
MUST
be installed on the air discharge
side of the furnace. Under no circumstances
should the air flow be such that cooled, conditioned
air can pass over the furnace heat exchanger. This
will cause condensation in the heat exchanger and
possible failure of the heat exchanger that could
lead to a fire hazard and/or hazardous conditions
that may lead to bodily harm. Heat exchanger
failure due to improper installation will not be
covered by warranty.
VENTING
Venting for this category IV furnace must be with
schedule 40 PVC, CPVC or ABS pipe including all elbows
and vent terminals. All pipe and fittings must conform to
the American Society for Testing and Material (ASTM),
and American National Standards Institute (ANSI)
Standards. PVC primer and solvent cement used to
secure all PVC joints must conform to ASTM D2564.
Common venting with other condensing appliances
or non-condensing appliances is not allowed.
In all direct vent (two pipe) instances, the vent
outlet shall be installed so as to be in the same
atmospheric pressure zone as the combustion air
intake.
All combustion air and exhaust piping must be
installed in accordance with local codes and these
instructions. For additional venting information refer to
ANSI/NFPA 211 Chimney, Fireplaces, Vents and Solid
Fuel Burning Appliances or Canadian equivalent.
1.
Determine termination location based on clearances
provided in Figure 8 and the appropriate termination
spacing shown in Figures 10, 11, 12, 14, and 15.
2.
Ensure all vent and air termination remain at least 12"
above ground or normally expected snow
accumulation height.
3.
The vent for this appliance shall not terminate
a) Over public walkways; or
b) Near soffit vents or crawl space vents or other
areas where condensate or vapor could creat a
nuisance or hazard or cause poperty damage; or
c)
Where condenstae vapor could cause damage or
could be detrimental to the operation of
regulators, relief valves, or other equipment.
4.
Do not terminate within 4' horizontally from any
electric meter, gas meter, regulator or any relief
equipment. These distances apply to U.S.
installations. In Canada, the Canadian Fuel Gas
Code takes precedence over this requirement.
5.
Vent pipe systems (2 pipe or 1 pipe) termination
clearances will follow the direct vent termination
clearances as shown in Figure 8.
Failure to terminate vent runs above the annual
snow accumulation level may result in nuisance
furnace shutdown and/or hazardous condition that
may lead to bodily harm or loss of life.
20558801
Issue 0442
Page 12 of 32
Summary of Contents for Gas-Fired Furnace
Page 13: ...FURNACE WIRING SPECIFICATIONS 20558801 Issue 0442 Page 5 of 32 ...
Page 21: ...Figure 8 20558801 Issue 0442 Page 13 of 32 VENT TERMINATION CLEARANCES ...
Page 36: ...SEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROL 20558801 Issue 0442 Page 28 of 32 ...
Page 40: ...WIRING DIAGRAM 20558801 Issue 0442 Page 32 of 32 ...