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Example:
Given —
Negative Pressure.......................0.1in.wg
Outdoor Airflow ........................1100cfm
Determine —
Setting = 6Љ
Fig. 24 — Durablade Economizer Damper
Minimum Position Setting
4
3
2
1
0
5
6
7
8
9
Fig. 25 — Durablade Economizer Minimum
Position Damper Setting
MINIMUM
POSITION
OPEN
3
1
T
P
P1
T1
4
2
5
S
S
O
D
C
TR
B
REV. B
198818A
%
H
U
M
I
D
I
T
Y
90
70
60
30
10
D
C
B
A
60
65
70
75
55
50
85
80
DAMPER
DAMPER
CLOSED
OPEN
OUTDOOR TEMP.
°F
REV.
97-3672
CW–SETPOINTS–CCW
CONTACTS SHOWN IN HIGH ENTHALPY
RUSH AT 24VAC
3 mA MIN. AT 11 VDC
CONTACT RATINGS: 1.5A RUN, 3.5A IN
OR UNPOWERED STATE
1
2
3
TR
TR1
24VAC
ENTHALPY
CONTROL
Fig. 26 — Outdoor-Air Thermostat/
Enthalpy Control Installation
Fig. 27 — Wiring Connections for
Outdoor-Air Thermostat
14