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W7340, W7345 COMMUNICATING ECONOMIZER LOGIC MODULES
63-2569—04 10
Fig. 10. W7340 Performance Characteristics for Enthalpy Changeover Settings.
Table 3. W7345 Performance Characteristics
for Temperature Changeover Settings.
CONTROL
CURVE
A
B
C
D
E
CONTROL POINT
APPROX. °F (°C)
AT 50% RH
73 (23)
70 (21)
67 (19)
63 (17)
55 (13)
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46
90
100
80
70
60
50
40
30
20
10
ENTHALPY—BTU PER POUND DRY AIR
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
M23879
RELATIVE HUMIDITY (%)
1
1
HIGH LIMIT CURVE FOR W7210D, W7212, W7213, W7214, W7340B.
E
E
Temperature
Changeover Setting
Approximate Control Point
°F °C
A7323
B7021
C6719
D6317
E5513