W7212, W7213, W7214 ECONOMIZER LOGIC MODULES
11
63-2596—09
Fig. 8. W7212C performance characteristics for enthalpy 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 DR
Y 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
M23879A
RELA
TIVE HUMIDITY
(%)
1
1
HIGH LIMIT CURVE FOR W7210D, W7212, W7213, W7214, W7340C.
E
E
