Bryant Preferred 549K 04-06, Service And Maintenance Instructions

Page: 34 / 92

34
Fig. 59 — Outdoor-Air Damper Leakage
Fig. 60 — Return Air Temperature or Enthalpy Sensor
Mounting Location
Fig. 61 — 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