14
INSTALLER’S GUIDE
Temp F
Temp C
R(K OHMS)
DC Volts
33.8
1
9.576
3.910
35.6
2
9.092
3.882
37.4
3
8.636
3.894
39.2
4
8.204
3.863
41.0
5
7.796
3.829
42.8
6
7.412
3.790
44.6
7
7.048
3.749
46.4
8
6.705
3.713
48.2
9
6.380
3.674
50.0
10
6.073
3.634
51.8
11
5.782
3.590
53.6
12
5.507
3.550
55.4
13
5.247
3.507
57.2
14
5.000
3.420
59.0
15
4.767
3.373
60.8
16
4.545
3.328
62.6
17
4.335
3.283
64.4
18
4.136
3.239
66.2
19
3.948
3.180
68.0
20
3.769
3.157
69.8
21
3.599
3.118
71.6
22
3.437
3.080
73.4
23
3.284
3.034
75.2
24
3.138
3.007
77.0
25
3.000
2.971
78.8
26
2.869
2.932
80.6
27
2.744
2.896
82.4
28
2.625
2.860
84.2
29
2.512
2.824
86.0
30
2.404
2.787
87.8
31
2.301
2.750
89.6
32
2.204
2.714
91.4
33
2.111
2.676
93.2
34
2.023
2.639
95.0
35
1.938
2.600
96.8
36
1.858
2.561
98.6
37
1.781
2.526
100.4
38
1.708
2.484
Temp vs. OHM for MAS (Mixed Air Sensor)
Table 3. Temp vs. OHM Values for MAS (Mixed Air Sensor)
1
1
2
2
M9097
ENTHALPY CHANGEOVER
SETPOINT
LED LIGHTS WHEN
OUTDOOR AIR IS SUITABLE
FOR FREE COOLING
INSERT DC MILLIAMMETER BETWEEN S
O
AND S FOR CHECKOUT
AND TROUBLESHOOTING.
JUMPER USED FOR SINGLE ENTHALPY CONTROL.
TR
TR1
A
B C
D
SO
SR
+
+
+
C7400
620 OHM
JUMPER
DC
MILLIMETER
W7459
S
+
1
1
M9098B
ENTHALPY
CHANGEOVER
SETPOINT
MINIMUM
DAMPER
POSITION
SETTING
LED LIGHTS
WHEN OUTDOOR
AIR IS SUITABLE
FOR FREE COOLING
MINIMUM DAMPER POSITION ADJUSTMENT
IS PRESENT ONLY ON W7459A,D MODELS.
Location of Enthalpy Set Point,
Minimum Position and LED
Meter Location for Checkout
and Troubleshooting
MULTIMETER
MULTIMETER
Figure 17. Enthalpy LEDs and Checkout
