Reznor R6GP Option - Installation - Economizer - Lt Commercial - Manual (Page 6)

6
INSTALLATION
INSTRUCTION
INSTALLATION INSTRUCTIONS FOR
559374
ECONOMIZERS USED WITH Q5SN / Q6SP 090-120
P6 / R6 120 UNITS
1. Measure the return air temperature.
2. Measure the outside air temperature.
3. Draw a line from the return air temperature to the
outside air temperature.
4. Measure the mixed air temperature in multiple
locations and determine the average.
5. Draw a line down from the mixed air temperature to the
point where it intersects the first line.
6. Draw a line from the point of intersection to the outside
air percentage on the left side of the chart.
According to the results from this chart this air handler is
supplied with 26% outside air. If the total supply volume is
20,000 cubic feet per minute (cfm) (566 m
3 /min) then:
0.26 X 20,000 cfm of total supply air equals 5,200 cfm of
outside air (147 m
3
/min).
This indicates that when the measurements were done on
this air handler the total volume of outside air in the mixed
air was 5,200 cfm of outside air (147 m
3 /min).