Bryant 549B Series, Installation, Start-Up And Service Instructions Manual

Page: 17 / 48

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17
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CONTROL
CURVE
A
B
C
D
CONTROL POINT
APPROX. °F (°C)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)
12
14
1
6
18
20
2
2
24
26
28
30
32
34
36
38
40
42
44
46
90
10
0
80
70
60
50
40
30
20
10
ENT
HA
LP
Y—
BTU
P
ER
PO
UN
D DR
Y A
IR
85
(29)
90
(32)
95
(35)
100
(38)
105
(41)
110
(43)
35
(2)
35
(2)
40
(4)
40
(4)
105
(41)
110
(43)
45
(7)
45
(7)
50
(10)
50
(10)
55
(13)
55
(13)
60
(16)
60
(16)
65
(18)
65
(18)
70
(21)
70
(21)
75
(24)
75
(24)
80
(27)
80
(27)
85
(29)
90
(32)
95
(35)
100
(38)
APPROXIMATE DRY BULB TEMPERATURE— °F (°C)
A
A
B
B
C
C
D
D
RELA
TIVE HUM
IDITY
(%
)
HIGH LIMIT
CURVE
TR1
24 Vac
COM
TR
24
Vac
HOT
1 2
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
0
1000
2000
3000
4000
5000
6000
2 3 4 5 6 7 8
800 ppm
900 ppm
1000 ppm
1100 ppm
RANGE CONFIGURA
TION (ppm)
DAMPER VOLTAGE FOR MAX VENTILATION RATE
CO SENSOR MAX RANGE SETTING
2
Fig. 28 — Enthalpy Changeover Set Points
Fig. 29 — EconoMi$er IV Control
Fig. 30 — CO
2
Sensor Maximum Range Setting