Manual 2100-721B
Page
53 of 54
"A"
AIRFLOW
MIS-1724
TABLE 20
Fan Blade Dimension
FIGURE 26
Fan Blade
38. 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 27 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 27
Low NOx Insert
36. 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.
Table 19 shows 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.
37. FAN BLADE SETTING DIMENSIONS
The correct fan blade setting dimension for proper air
delivery across the outdoor coil is shown in Figure 26.
Model
Dimension A
W24G
1.25
W30G
1.25
W36G
1.25
W42G
1.75
W48G
1.75
W60G
1.75
