Bard WG3S2-A, Installation Instructions Manual

Page: 46 / 59

Manual 2100-587C
Page 46 of 59
35. 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
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 22
LOW NOX INSERT
R-410A
34. 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 (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.