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Lennox LGT092H4E - DIRECT DRIVE BLOWER OPERATION; Setting Supply Air CFM; Setting Damper Minimum Position

Lennox LGT092H4E
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Page 49
VIII-Direct Drive Supply Air Inverter
If a test and balance contractor has not commissioned the
ξ™˜ξ™‘ξ™Œξ™—ξ˜ξ˜ƒξ™˜ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™Œξ™–ξ˜ƒξ™–ξ™ˆξ™†ξ™—ξ™Œξ™’ξ™‘ξ˜ƒξ™—ξ™’ξ˜ƒξ™–ξ™ˆξ™—ξ˜ƒξ™–ξ™˜ξ™“ξ™“ξ™ξ™œξ˜ƒξ™„ξ™Œξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘
A-Set Blower Speed
1 - ξ˜ƒξ˜Έξ™–ξ™ˆξ˜ƒξ™—ξ™„ξ™…ξ™ξ™ˆξ˜ƒξ˜”ξ˜™ξ˜ƒξ™—ξ™’ξ˜ƒξšΏξ™ξ™ξ˜ƒξ™Œξ™‘ξ˜ƒξšΏξ™ˆξ™ξ™‡ξ˜ξ™“ξ™•ξ™’ξ™™ξ™Œξ™‡ξ™ˆξ™‡ξ˜ξ˜ƒξ™‡ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ƒ
ξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘
TABLE 16
ξ˜₯ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ˜§ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ˜Άξ™“ξ™ˆξ™†ξ™ŒξšΏξ™†ξ™„ξ™—ξ™Œξ™’ξ™‘ξ™–
Blower Speed ξ˜§ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ˜Άξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ƒξ˜¦ξ˜©ξ˜°
ξ˜«ξ™ˆξ™„ξ™—ξ™Œξ™‘ξ™Š
ξ˜¦ξ™’ξ™’ξ™ξ™Œξ™‘ξ™Šξ˜ƒξ˜«ξ™Œξ™Šξ™‹
Cooling Medium
Cooling Low
Ventilation
2 - Use the following menu to enter the blower design
ξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™‘ξ™—ξ™’ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜‘ξ˜ƒξ˜§ξ™’ξ™‘ξšΆξ™—ξ˜ƒξ™“ξ™•ξ™ˆξ™–ξ™–ξ˜ƒ
ξš³ξ˜Άξ˜€ξ˜Ήξ˜¨ξš΄ξ˜ƒξ™˜ξ™‘ξ™—ξ™Œξ™ξ˜ƒξ™„ξ™ξ™ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™„ξ™•ξ™ˆξ˜ƒξ™ˆξ™‘ξ™—ξ™ˆξ™•ξ™ˆξ™‡ξ˜‘ξ˜ƒξ˜°ξ™„ξ™Žξ™ˆξ˜ƒξ™–ξ™˜ξ™•ξ™ˆξ˜ƒξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒ
ξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ™šξ™Œξ™—ξ™‹ξ™Œξ™‘ξ˜ƒξ™ξ™Œξ™ξ™Œξ™—ξ™„ξ™—ξ™Œξ™’ξ™‘ξ™–ξ˜ƒξ™–ξ™‹ξ™’ξ™šξ™‘ξ˜ƒξ™Œξ™‘ξ˜ƒξ™—ξ™„ξ™…ξ™ξ™ˆξ˜ƒξ˜”ξ˜–ξ˜‘ξ˜ƒξ˜΅ξ™ˆξ™‰ξ™ˆξ™•ξ˜ƒξ™—ξ™’ξ˜ƒ
the Unit Controller manual provided with unit.
ξ˜Άξ˜¨ξ˜·ξ˜Έξ˜³ξ˜ƒξ˜‘ξ˜ƒξ˜·ξ˜¨ξ˜Άξ˜·ξ˜ƒξ˜‰ξ˜ƒξ˜₯ξ˜€ξ˜―ξ˜€ξ˜±ξ˜¦ξ˜¨ξ˜ƒξ˜‘ξ˜ƒξ˜₯
3 - ξ˜ƒξ˜²ξ™‘ξ™†ξ™ˆξ˜ƒξ™„ξ™ξ™ξ˜ƒξ™‰ξ™’ξ™˜ξ™•ξ˜ƒξ™–ξ™“ξ™ˆξ™ˆξ™‡ξ™–ξ˜ƒξ™„ξ™•ξ™ˆξ˜ƒξ™ˆξ™‘ξ™—ξ™ˆξ™•ξ™ˆξ™‡ξ˜ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™—ξ™„ξ™•ξ™Šξ™ˆξ™—ξ˜ƒξ˜‹ξ™‹ξ™Œξ™Šξ™‹ξ™ˆξ™–ξ™—ξ˜ƒ
ξ™’ξ™‰ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™‹ξ™ˆξ™„ξ™—ξ™Œξ™‘ξ™Šξ˜ƒξ™„ξ™‘ξ™‡ξ˜ƒξ™†ξ™’ξ™’ξ™ξ™Œξ™‘ξ™Šξ˜ƒξ™–ξ™ˆξ™—ξ™—ξ™Œξ™‘ξ™Šξ™–ξ˜Œξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™„ξ™‘ξ™‡ξ˜ƒξ™‡ξ™ˆξ™‰ξ™„ξ™˜ξ™ξ™—ξ˜ƒ
RPM will be displayed.
Note - When units are not equipped with heat, the
Blower Heat speed will not be displayed. Blower
Cooling High will be the rst blower speed to appear.
4 - Measure the static pressure as shown in the Blower
ξ˜Άξ™—ξ™„ξ™•ξ™—ξ˜ξ˜Έξ™“ξ˜ƒ ξ™–ξ™ˆξ™†ξ™—ξ™Œξ™’ξ™‘ξ˜‘ξ˜ƒ ξ˜Έξ™–ξ™ˆξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ™–ξ™—ξ™„ξ™—ξ™Œξ™†ξ˜ƒ ξ™“ξ™•ξ™ˆξ™–ξ™–ξ™˜ξ™•ξ™ˆξ˜ξ˜ƒ ξ™—ξ™„ξ™•ξ™Šξ™ˆξ™—ξ˜ƒ
ξ˜¦ξ˜©ξ˜°ξ˜ƒ ξ™„ξ™‘ξ™‡ξ˜ƒ ξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒ ξ™—ξ™„ξ™…ξ™ξ™ˆξ™–ξ˜ƒ ξ™—ξ™’ξ˜ƒ ξ™‡ξ™ˆξ™—ξ™ˆξ™•ξ™ξ™Œξ™‘ξ™ˆξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ˜΅ξ˜³ξ˜°ξ˜ƒ
ξ™‘ξ™ˆξ™ˆξ™‡ξ™ˆξ™‡ξ˜‘ξ˜ƒξ˜Ήξ™„ξ™ξ™˜ξ™ˆξ™–ξ˜ƒξ™Œξ™‘ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ™—ξ™„ξ™…ξ™ξ™ˆξ˜ƒξ™•ξ™ˆξ›€ξ™ˆξ™†ξ™—ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™–ξ™—ξ™„ξ™—ξ™Œξ™†ξ˜ƒ
ξ™“ξ™•ξ™ˆξ™–ξ™–ξ™˜ξ™•ξ™ˆξ™–ξ˜ƒξ™—ξ™„ξ™Žξ™ˆξ™‘ξ˜ƒξ™Œξ™‘ξ˜ƒξ™ξ™’ξ™†ξ™„ξ™—ξ™Œξ™’ξ™‘ξ™–ξ˜ƒξ™–ξ™‹ξ™’ξ™šξ™‘ξ˜ƒξ™Œξ™‘ξ˜ƒξšΏξ™Šξ™˜ξ™•ξ™ˆξ˜ƒξ˜œξ˜‘
ξ˜˜ξ˜ƒξ˜ξ˜ƒ Enter the RPM and repeat the previous step until
ξ™—ξ™‹ξ™ˆξ˜ƒξ™‡ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ™•ξ™ˆξ™„ξ™†ξ™‹ξ™ˆξ™‡ξ˜‘
6 - Press SAVE followed by MAIN MENU.
Note - Once the CFM settings are saved, the Unit
Controller will set all other blower CFM.
B-Set Damper Minimum Position
To maintain required minimum ventilation air volumes
ξ™šξ™‹ξ™ˆξ™‘ξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ™˜ξ™‘ξ™Œξ™—ξ˜ƒ ξ™Œξ™–ξ˜ƒ ξ™Œξ™‘ξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ™’ξ™†ξ™†ξ™˜ξ™“ξ™Œξ™ˆξ™‡ξ˜ƒ ξ™ξ™’ξ™‡ξ™ˆξ˜ξ˜ƒ ξ™—ξ™šξ™’ξ˜ƒ ξ™ξ™Œξ™‘ξ™Œξ™ξ™˜ξ™ξ˜ƒ
damper positions must be set. The Unit Controller will
open the dampers to β€œMin OCP Blwr Low” when blower
ξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ˜₯ξ˜¨ξ˜―ξ˜²ξ˜Ίξ˜ƒξ™„ξ˜ƒξš³ξ™ξ™Œξ™‡ξ™“ξ™’ξ™Œξ™‘ξ™—ξš΄ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘ξ˜ƒξ˜·ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒξ™šξ™Œξ™ξ™ξ˜ƒ
ξ™’ξ™“ξ™ˆξ™‘ξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ™‡ξ™„ξ™ξ™“ξ™ˆξ™•ξ˜ƒ ξ™—ξ™’ξ˜ƒ ξš³ξ˜°ξ™Œξ™‘ξ˜ƒ ξ˜²ξ˜¦ξ˜³ξ˜ƒ ξ˜₯ξ™ξ™šξ™•ξ˜ƒ ξ˜«ξ™Œξ™Šξ™‹ξš΄ξ˜ƒ ξ™šξ™‹ξ™ˆξ™‘ξ˜ƒ ξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒ
ξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ™„ξ™—ξ˜ƒξ™’ξ™•ξ˜ƒξ˜€ξ˜₯ξ˜²ξ˜Ήξ˜¨ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξš³ξ™ξ™Œξ™‡ξ™“ξ™’ξ™Œξ™‘ξ™—ξš΄ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘
ξ˜·ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒξ™šξ™Œξ™ξ™ξ˜ƒξ™†ξ™„ξ™ξ™†ξ™˜ξ™ξ™„ξ™—ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξš³ξ™ξ™Œξ™‡ξ™“ξ™’ξ™Œξ™‘ξ™—ξš΄ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘
Set Minimum Position 1
Use the following menu in the Unit Controller to set β€œMin
ξ˜²ξ˜¦ξ˜³ξ˜ƒξ˜₯ξ™ξ™šξ™•ξ˜ƒξ˜―ξ™’ξ™šξš΄ξ˜ƒξ™‰ξ™’ξ™•ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™…ξ™ˆξ™ξ™’ξ™šξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξš³ξ™ξ™Œξ™‡ξ™“ξ™’ξ™Œξ™‘ξ™—ξš΄ξ˜ƒ
ξ˜¦ξ˜©ξ˜°ξ˜‘ξ˜ƒξ˜Ίξ™‹ξ™ˆξ™‘ξ˜ƒξ™‘ξ™„ξ™™ξ™Œξ™Šξ™„ξ™—ξ™Œξ™‘ξ™Šξ˜ƒξ™Œξ™‘ξ™—ξ™’ξ˜ƒξ™—ξ™‹ξ™Œξ™–ξ˜ƒξ™ξ™ˆξ™‘ξ™˜ξ˜ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒ
will bring on the corresponding blower speed and allow
damper position adjustment.
ξ˜ͺξ˜Άξ˜ƒξ˜‘ξ˜ƒ ξ˜΅ξ˜·ξ˜Έξ˜ƒξ˜²ξ™“ξ™—ξ™Œξ™’ξ™‘ξ™–ξ˜ƒξ˜‘ξ˜ƒξ˜¨ξ˜§ξ˜¬ξ˜·ξ˜ƒξ˜³ξ˜€ξ˜΅ξ˜€ξ˜°ξ˜¨ξ˜·ξ˜¨ξ˜΅ξ˜ƒ ξ˜‘ξ˜ƒξ˜¨ξ˜±-
ξ˜·ξ˜¨ξ˜΅ξ˜ƒξ˜§ξ˜€ξ˜·ξ˜€ξ˜ƒξ˜¬ξ˜§ξ˜ƒξ˜ξ˜ƒξ˜œξ˜ƒξ˜‘ξ˜ƒξ˜°ξ˜¬ξ˜±ξ˜ƒξ˜§ξ˜€ξ˜°ξ˜³ξ˜¨ξ˜΅ξ˜ƒξ˜―ξ˜²ξ˜Ίξ˜ƒξ˜₯ξ˜―ξ˜²ξ˜Ίξ˜¨ξ˜΅ξ˜ƒξ˜ ξ˜ƒξ˜»ξ˜‘ξ˜»ξ˜ƒ

ξ˜°ξ™ˆξ™„ξ™–ξ™˜ξ™•ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™Œξ™‘ξ™—ξ™„ξ™Žξ™ˆξ˜ƒξ™„ξ™Œξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘ξ˜ƒξ˜¬ξ™‰ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ™—ξ™‹ξ™„ξ™‘ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒ
ξ™‡ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™‰ξ™’ξ™•ξ˜ƒξ™™ξ™ˆξ™‘ξ™—ξ™Œξ™ξ™„ξ™—ξ™Œξ™’ξ™‘ξ˜ƒξ™„ξ™Œξ™•ξ˜ξ˜ƒξ™˜ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘-
ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒξ™—ξ™’ξ˜ƒξ™Œξ™‘ξ™†ξ™•ξ™ˆξ™„ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™‡ξ™„ξ™ξ™“ξ™ˆξ™•ξ˜ƒξ™“ξ™ˆξ™•ξ™†ξ™ˆξ™‘ξ™—ξ˜ƒξ™’ξ™“ξ™ˆξ™‘ξ˜‘ξ˜ƒξ˜¬ξ™‰ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒ
ξ™‹ξ™Œξ™Šξ™‹ξ™ˆξ™•ξ˜ƒξ™—ξ™‹ξ™„ξ™‘ξ˜ƒξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ξ˜ƒξ™‡ξ™ˆξ™†ξ™•ξ™ˆξ™„ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™‡ξ™„ξ™ξ™“ξ™ˆξ™•ξ˜ƒξ™“ξ™ˆξ™•ξ™†ξ™ˆξ™‘ξ™—ξ˜ƒξ™’ξ™“ξ™ˆξ™‘ξ˜‘
Note - Intake air CFM can also be determined using the
outdoor air temperature, return air temperature and mixed
air temperature. Refer to the economizer or outdoor air
damper installation instructions.
Set Minimum Position 2
Use the same menu in the Unit Controller to set β€œMin OCP
ξ˜₯ξ™ξ™šξ™•ξ˜ƒξ˜«ξ™Œξ™Šξ™‹ξš΄ξ˜ƒξ™‰ξ™’ξ™•ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™…ξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™„ξ™…ξ™’ξ™™ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξš³ξ™ξ™Œξ™‡ξ™“ξ™’ξ™Œξ™‘ξ™—ξš΄ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘ξ˜ƒ
ξ˜Ίξ™‹ξ™ˆξ™‘ξ˜ƒ ξ™‘ξ™„ξ™™ξ™Œξ™Šξ™„ξ™—ξ™Œξ™‘ξ™Šξ˜ƒ ξ™Œξ™‘ξ™—ξ™’ξ˜ƒ ξ™—ξ™‹ξ™Œξ™–ξ˜ƒ ξ™ξ™ˆξ™‘ξ™˜ξ˜ξ˜ƒ ξ™—ξ™‹ξ™ˆξ˜ƒ ξ˜Έξ™‘ξ™Œξ™—ξ˜ƒ ξ˜¦ξ™’ξ™‘ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒ ξ™šξ™Œξ™ξ™ξ˜ƒ
bring on the corresponding blower speed and allow damp-
er position adjustment.
ξ˜ͺξ˜Άξ˜ƒξ˜‘ξ˜ƒξ˜΅ξ˜·ξ˜Έξ˜ƒξ˜²ξ˜³ξ˜·ξ˜¬ξ˜²ξ˜±ξ˜Άξ˜ƒξ˜‘ξ˜ƒξ˜§ξ˜€ξ˜°ξ˜³ξ˜¨ξ˜΅ξ˜ƒξ˜‘ξ˜ƒξ˜°ξ˜¬ξ˜±ξ˜ƒξ˜§ξ˜€ξ˜°ξ˜³-
ξ˜¨ξ˜΅ξ˜ƒξ˜³ξ˜²ξ˜Άξ˜¬ξ˜·ξ˜¬ξ˜²ξ˜±ξ˜ƒξ˜₯ξ˜―ξ˜²ξ˜Ίξ˜¨ξ˜΅ξ˜ƒξ˜²ξ˜±ξ˜ƒξ˜«ξ˜¬ξ˜ͺξ˜«ξ˜ƒξ˜ ξ˜ƒξ˜»ξ˜‘ξ˜»ξ˜ƒξ˜ˆ
ξ˜°ξ™ˆξ™„ξ™–ξ™˜ξ™•ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™Œξ™‘ξ™—ξ™„ξ™Žξ™ˆξ˜ƒξ™„ξ™Œξ™•ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜‘ξ˜ƒξ˜¬ξ™‰ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒξ™ξ™’ξ™šξ™ˆξ™•ξ˜ƒξ™—ξ™‹ξ™„ξ™‘ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒ
ξ™‡ξ™ˆξ™–ξ™Œξ™Šξ™‘ξ˜ƒξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™‰ξ™’ξ™•ξ˜ƒξ™™ξ™ˆξ™‘ξ™—ξ™Œξ™ξ™„ξ™—ξ™Œξ™’ξ™‘ξ˜ƒξ™„ξ™Œξ™•ξ˜ξ˜ƒξ™˜ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜Έξ™‘ξ™Œξ™—ξ˜ƒξ˜¦ξ™’ξ™‘-
ξ™—ξ™•ξ™’ξ™ξ™ξ™ˆξ™•ξ˜ƒξ™—ξ™’ξ˜ƒξ™Œξ™‘ξ™†ξ™•ξ™ˆξ™„ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™‡ξ™„ξ™ξ™“ξ™ˆξ™•ξ˜ƒξ™“ξ™ˆξ™•ξ™†ξ™ˆξ™‘ξ™—ξ˜ƒξ™’ξ™“ξ™ˆξ™‘ξ˜‘ξ˜ƒξ˜¬ξ™‰ξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜ƒξ™Œξ™–ξ˜ƒ
ξ™‹ξ™Œξ™Šξ™‹ξ™ˆξ™•ξ˜ƒξ™—ξ™‹ξ™„ξ™‘ξ˜ƒξ™–ξ™“ξ™ˆξ™†ξ™ŒξšΏξ™ˆξ™‡ξ˜ξ˜ƒξ™‡ξ™ˆξ™†ξ™•ξ™ˆξ™„ξ™–ξ™ˆξ˜ƒξ™—ξ™‹ξ™ˆξ˜ƒξ™‡ξ™„ξ™ξ™“ξ™ˆξ™•ξ˜ƒξ™“ξ™ˆξ™•ξ™†ξ™ˆξ™‘ξ™—ξ˜ƒξ™’ξ™“ξ™ˆξ™‘ξ˜‘
Note - Intake air CFM can also be determined using the
outdoor air temperature, return air temperature and mixed
air temperature. Refer to the economizer or outdoor air
damper installation instructions.
TABLE 17
MINIMUM AND MAXIMUM CFM
ξ˜ͺξ™„ξ™–ξ˜ƒξ˜«ξ™ˆξ™„ξ™—ξ˜ƒξ˜°ξ™Œξ™‘ξ™Œξ™ξ™˜ξ™ξ˜ƒξ˜¦ξ˜©ξ˜°
Unit ξ˜ͺξ™„ξ™–ξ˜ƒξ˜«ξ™ˆξ™„ξ™—ξ˜ƒξ˜Άξ™Œξ™ξ™ˆ ξ˜€ξ™Œξ™•ξ›€ξ™’ξ™šξ˜ƒξ˜¦ξ˜©ξ˜°ξ˜
ξ˜ͺξ˜·ξ˜“ξ˜œξ˜•ξ˜«ξ˜ξ˜”ξ˜˜ξ˜“ξ˜«
Standard ξ˜•ξ˜”ξ˜˜ξ˜“
Medium ξ˜•ξ˜˜ξ˜˜ξ˜“
ξ˜«ξ™Œξ™Šξ™‹ ξ˜•ξ˜™ξ˜“ξ˜“

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