35
Fig. 61 — Outdoor-Air Damper Leakage
Fig. 62 — Return Air Temperature or Enthalpy Sensor
Mounting Location
Fig. 63 — EconoMi$er IV W7212 Control
0
500
1000
1500
2000
2500
0
0.05
0.1
0.15
0.2
0.25
0.3
RETURN DUCT
S
TATIC PRE
SS
URE (in. wg)
R
ELIEF FLO
W (CFM)
3-5 Ton
Horizontal Economizers
0
1000
2000
3000
4000
5000
6000
0
0 .1
0 .2
0 .3
0 .4
RETURN DUCT
S
TATIC PRE
SS
URE DROP (in. wg)
RETURN AIR FLO
W (CFM)
3-5 Ton
Horizontal Economizers
0
500
1000
1500
2000
2500
0
0.05
0.1
0.15
0.2
0.25
0.3
RETURN DUCT
S
TATIC PRE
SS
URE (in. wg)
R
ELIEF FLO
W (CFM)
3-5 Ton
Vertical Economizers
Vertical Economizers
0
1000
2000
3000
4000
5000
6000
RETURN AIR FLO
W (CFM)
3-5 Ton
HORIZONTAL ECONOMIZER BAROMETRIC RELIEF FLOW
HORIZONTAL ECONOMIZER RETURN AIR PRE
SS
URE DROP
VERTICAL ECONOMIZER BAROMETRIC RELIEF FLOW
VERTICAL ECONOMIZER RETURN AIR PRE
SS
URE DROP
0
0 .1
0 .2
0 .3
0 .4
RETURN DUCT
S
TATIC PRE
SS
URE DROP (in. wg)
6 Ton
6 Ton
6 Ton
6 Ton
ECONOMI$ER IV
ECONOMI$ER IV
CONTROLLER
GROMMET
RETURN AIR
S
EN
S
OR
RETURN DUCT
(FIELD-PROVIDED)
TR1
24 Vac
COM
TR
24
Vac
HOT
1
2
3
4
5
EF
EF1
+
_
P1
T1
P
T
N
EXH
2V
10V
EXH
S
et
S
et
2V
10V
2V
10V
DCV
DCV
Free
Cool
B
C
A
D
S
O+
S
R+
S
R
S
O
AQ1
AQ
DCV
Min
Pos
Open
Max
N1