Daikin DBC Kit Instructions page 4

Attaching Power Exhaust to the Return Air Duct:
1. Make sure all power exhaust harnesses are
connected as indicated in the previous steps.
2. Make sure all wiring is secure. Use field-supplied wire
ties if necessary. Be sure that wiring does not interfere
with operation of the HVAC unit, economizer, or power
exhaust.
3. Apply gasket from hardware bag to the mating flanges
of the power exhaust. (Fig. 6)
4. Lift power exhaust and install over the duct opening
using the #10 x 3/4in. long screws provided. (Fig 6).
Make sure wiring harnesses are properly secured.
GASKET AROUND FLANGE
Figure 6 – Power Exhaust Installed on Duct
5. Return power to unit and remove lockout tag. For gas
units, turn on the gas supply.
6. Test power exhaust operation by setting the power
exhaust set point on the economizer controller to 0%.
Power exhaust performance is shown in Fig 7.
5000
4000
3000
2000
1000
0
0.1 0.2 0.3
RETURN DUCT STATIC PRESSURE (in wc)
Figure 7 – Power Exhaust Performance
7. Adjust the power exhaust set point on the economizer
controller to the desired activation point per unit
schematic.
SHEETMETAL SCREWS
3 to 6 Ton Units
208/230V
3 to 6 Ton Units
460V
7½ to 12½ Ton Units
208/230V
7½ to 12½ Ton Units
460V
0.4 0.5
4