R-410A Refrigerant Charge; Low Nox Burner Assembly "N" Suffix Models Only - U.s. Installations Only; Figure 23 Low Nox Insert - Bard WG Series Installation Instructions Manual

35. R-410A REFRIGERANT CHARGE

This unit was charged at the factory with the quantity
of refrigerant listed on the serial plate. AHRI capacity
and efficiency ratings were determined by testing with
this refrigerant charge quantity.
The pressure tables on page 45 show nominal
pressures for the units. Since many installation
specific situations can affect the pressure readings,
this information should only be used by certified
technicians as a guide for evaluating proper system
performance. They shall not be used to adjust charge.
If charge is in doubt, reclaim, evacuate and recharge
the unit to the serial plate charge.
Manual 2100-587J
Page 46 of 59
36. LOW-NOX BURNER ASSEMBLY "N"
SUFFIX MODELS ONLY – U.S.
INSTALLATIONS ONLY
Natural Gas Models Only
Model numbers designated with an "N" are designed
for low NOx emissions which comply with all California
Air Quality Management District regulations for
nitrogen oxide emission levels. Refer to Figure 23
below for NOx insert information.
* *
IMPORTANT
For propane (LP) conversions the NOx
reduction screen inserts shown below must be
removed. This is accomplished by removing
the burner box assembly and removing the
NOx screens. Reassemble unit properly before
firing. Failure to remove the NOx screens can
result in improper operation and malfunction of
the burner system.
FIGURE 23
Low NOx Insert
* *