Example: |
|
| OAT |
Given — |
|
| |
Negative Pressure | 0.1 in. wg | TOP | (TERMINALS ARE UP) |
Outdoor Airflow | 1100 cfm |
|
|
Determine — |
|
|
|
Setting = 6 |
|
|
|
Fig. 17 — Durablade Economizer Damper
Minimum Position Setting
UNIT
OUTSIDE AIR
SCREEN
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
ENTHALPY CONTROL
HOOD
| OPEN |
|
|
| POSITIONMINIMUM |
|
|
|
|
|
|
|
| S | ||
|
|
|
| T |
| 3 |
|
| 1 |
|
|
|
|
|
| |
| P |
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
| T1 |
| 4 |
|
| 2 |
|
| 5 |
|
|
| |
| P1 |
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
| T ID |
|
|
|
| 8 S | CONT | U | CONT |
|
|
|
| ||
|
|
|
|
|
| % |
| 1 R |
| OR |
|
|
|
|
| |
| Y |
|
| IMUH |
| 9 U |
|
|
|
|
|
|
| |||
|
|
|
| 70 | 90 |
| 8 H | ACT | NPOWERED | A |
|
|
|
| ||
|
| 30 | 60 |
|
| 8 | C | CTS | 3 |
| 2 | ENTHALPY | ||||
|
|
|
| T |
|
|
| |||||||||
| 60 |
| DAMPER |
|
| 1 | A | 5A | TE |
| 2 |
|
| |||
|
|
|
|
|
| m |
|
|
| |||||||
| 10 |
|
|
|
| D | CW | A | 2 | RA |
| SHO |
| TR |
| |
| 50 |
|
|
|
| C | – |
| A |
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| 4 | TINGS: |
|
|
|
|
|
|
OUTDOOR | 65 |
|
|
|
|
| SETPOINTS |
| M | ST | HIGH |
|
| C |
| |
| 55 |
| OPEN |
|
| B |
|
|
|
|
| WN |
|
| A |
|
|
|
|
|
|
|
|
| 3 . |
|
|
|
| 4V |
| ||
| 75 |
|
|
|
| A |
|
| VDC | 1 | A | IN |
|
|
| CONTROL |
F |
|
|
| CLOSED DAMPER |
|
|
|
|
| 1 | TR1 |
| ||||
|
|
|
|
|
|
|
|
| A | RUN, |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| . |
| ENTHALPY |
|
|
|
| |
° |
|
|
|
|
|
|
|
| 1 | IN |
|
|
|
|
| |
TEMP |
|
|
|
|
|
| – |
| A |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| IN | 5A |
|
|
|
|
|
| |
. | 70 |
|
|
|
|
| CCW |
| 1 |
|
|
|
|
|
| |
|
|
|
|
|
|
| T | 3 |
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| . |
|
|
|
|
|
|
| 80 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 85 |
|
|
|
| 2 |
|
|
|
|
|
|
|
|
|
|
| REV. |
|
|
|
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
B
C
D S
O
RE V .
B
TR
Fig. 18 — Durablade Economizer Minimum
Position Damper Setting
Fig. 19 —
Fig. 20 — Wiring Connections for
