Carrier 50FC Series - Cooling Troubleshooting

35
Fig. 62 — Outdoor-Air Damper Leakage
Fig. 63 — Return Air Temperature or Enthalpy Sensor
Mounting Location
Fig. 64 — EconoMi$er IV W7212 Control
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RETURN DUCT STATIC PRESSURE (in. wg)
RELIEF FLOW (CFM)
3-5 Ton
Horizontal Economizers
0
1000
2000
3000
4000
5000
6000
00.10.20.3 0.4
RETURN DUCT STATIC PRESSURE DROP (in. wg)
RETURN AIR FLOW (CFM)
3-5 Ton
Horizontal Economizers
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RETURN DUCT STATIC PRESSURE (in. wg)
RELIEF FLOW (CFM)
3-5 Ton
Vertical Economizers
Vertical Economizers
0
1000
2000
3000
4000
5000
6000
RETURN AIR FLOW (CFM)
3-5 Ton
HORIZONTAL ECONOMIZER BAROMETRIC RELIEF FLOW
HORIZONTAL ECONOMIZER RETURN AIR PRESSURE DROP
VERTICAL ECONOMIZER BAROMETRIC RELIEF FLOW
VERTICAL ECONOMIZER RETURN AIR PRESSURE DROP
00.10.20.3 0.4
RETURN DUCT STATIC PRESSURE DROP (in. wg)
6 Ton
6 Ton6 Ton
6 Ton
ECONOMI$ER IV
ECONOMI$ER IV
CONTROLLER
GROMMET
RETURN AIR
SENSOR
RETURN DUCT
(FIELD-PROVIDED)
TR1
24 Vac
COM
TR
24
Vac
HOT
12
3
4
5
EF
EF1
+
_
P1
T1
P
T
N
EXH
2V 10V
EXH
Set
Set
2V 10V
2V 10V
DCV
DCV
Free
Cool
B
C
A
D
SO+
SR+
SR
SO
AQ1
AQ
DCV
Min
Pos
Open
Max
N1