Carbon Monoxide (Co) Airflow - Rheem RGPE series Installation Instructions Manual

ALTERNATE METHOD FOR
CANADIAN HIGH-ALTITUDE
DERATE
In Canada, unless an orifice change is
specifically mandated by local codes, an
alternate method of altitude deration
through a reduction in manifold pressure
is acceptable as described in Table 12.
This information is based on a heating
value of 1000 BTU per cubic feet of nat-
ural gas, and 2500 BTU per cubic feet
of LP gas.
IMPORTANT: Actual input rates must
be measured onsite with manifold pres-
sure adjustment to ensure that an actual
10% reduction in input rate is achieved.
Once this field adjustment has been
made, the label shown in Figure 23
must be affixed in a conspicuous loca-
tion on the front of the furnace cabinet.
NOTE: This label is supplied in the
information packet shipped with each
furnace.
AIR FLOW
The importance of proper air flow over
the heat exchanger cannot be over
emphasized.
CAUTION
IT IS IMPORTANT THAT EACH DUCT
SYSTEM BE SIZED AND INSTALLED
FOR THE SPECIFIC APPLICATION BY
PROPERLY APPLYING THE APPRO-
PRIATE INDUSTRY ACCEPTED STAN-
DARD. IF LESS THAN MINIMUM
STANDARDS ARE APPLIED, THE
EQUIPMENT USER COULD EXPECT
TO EXPERIENCE HIGHER UTILITY
BILLS, MAJOR COMPONENT FAIL-
URE, VARYING DEGREES OF AIR
NOISE OR OTHER UNSATISFACTORY
ISSUES, OVER WHICH THE MANU-
FACTURER HAS NO CONTROL.
One of the most common causes of heat
exchanger failure is overheating due to
low air flow. An air flow table is located
inside the blower door and on the follow-
ing pages.
ZONING SYSTEMS
The manufacturer does not currently
provide or support zoning. However,
zoning systems can be installed with the
system as long as the zoning equipment
manufacturers specifications and instal-
lation instructions are met and followed.
The preferred zoning method is to use a
"bypass" system which is properly
installed for maximum efficiency. In
these systems, excess air is routed back
through the system to be used again –
this is opposed to a "dump" system in
which excess air is routed to a zone
where it is expected that the extra heat
or cooling would be least noticed.
If installed as a "bypass" system, the
installation must have an optional freeze
stat installed to prevent the coil from
icing with excess bypass cooling. Also, if
the zoning equipment manufacturer pro-
vides a limit switch (usually provided by
FIGURE 24
TEMPERATURE RISE MEASUREMENT
FIGURE 25
TYPICAL FURNACE NAME PLATE
AIR CONDITIONING DIVISION
FORT SMITH, ARKANSAS
31