York YCAL0080SC Manuale Utente
YORK INTERNATIONAL
99
FORM 150.62-NM1
CHECKING INPUTS AND OUTPUTS
BINARY INPUTS
Refer to the unit wiring diagram. All binary inputs are
connected to J9 of the microboard. The term “binary”
refers to two states –- either on or off. As an example,
when the flow switch is closed, 30 volts
connected to J9 of the microboard. The term “binary”
refers to two states –- either on or off. As an example,
when the flow switch is closed, 30 volts
dc will be ap-
plied to J9, pin 5 (J9-5) of the microboard. If the flow
switch is open, 0 volts dc will then be present at J9-5.
switch is open, 0 volts dc will then be present at J9-5.
Pin 1 of J9 is an
unregulated 30VDC that is the dc volt-
age
source used to supply the dc voltage to the various
contacts, unit switch, flow switch, etc. This dc source is
factory wired to CTB1, terminal 13. Any switch or con-
tact used as a binary input would be connected to this
terminal, with the other end connecting to it’s respective
binary input on the microboard. Anytime a switch or con-
tact is closed, 30VDC would be applied to that particular
binary input. Anytime a switch or contact is open, 0VDC
would be applied to that particular binary input.
factory wired to CTB1, terminal 13. Any switch or con-
tact used as a binary input would be connected to this
terminal, with the other end connecting to it’s respective
binary input on the microboard. Anytime a switch or con-
tact is closed, 30VDC would be applied to that particular
binary input. Anytime a switch or contact is open, 0VDC
would be applied to that particular binary input.
Typically, as high as 34VDC could be measured for the
dc voltage on the binary inputs. This voltage is in refer-
ence to ground. The unit case should be sufficient as a
reference point when measuring binary input voltages.
dc voltage on the binary inputs. This voltage is in refer-
ence to ground. The unit case should be sufficient as a
reference point when measuring binary input voltages.
ANALOG INPUTS – Temperature
Refer to the unit wiring diagram. Temperature inputs are
connected to the microboard on plug J6. These
connected to the microboard on plug J6. These
analog
inputs represent varying dc signals corresponding to
varying temperatures. All voltages are in reference to
the unit case (ground). Following are the connections
for the temperature sensing inputs:
varying temperatures. All voltages are in reference to
the unit case (ground). Following are the connections
for the temperature sensing inputs:
Outside Air Sensor
J6-4 = +5VDC regulated supply to sensor.
J6-7 = VDC input signal to the microboard. See Table
J6-7 = VDC input signal to the microboard. See Table
47 for voltage readings that correspond to
specific outdoor temperatures.
J6-1 = drain (shield connection = 0VDC)
TABLE 47 – OUTDOOR AIR SENSOR
TEMPERATURE/VOLTAGE/
RESISTANCE CORRELATION
RESISTANCE CORRELATION
TEMP °F
VOLTAGE
RESISTANCE
TEMP C°
0
0.7
85398
-18
5
0.8
72950
-15
10
0.9
62495
-12
15
1.0
53685
-9
20
1.1
46240
-7
25
1.2
39929
-4
30
1.4
34565
-1
35
1.5
29998
2
40
1.7
26099
4
45
1.8
22673
7
50
2.0
19900
10
55
2.2
17453
13
60
2.3
15309
16
65
2.5
13472
18
70
2.6
11881
21
75
2.8
10501
24
80
2.9
9298
27
85
3.1
8250
29
90
3.2
7332
32
95
3.4
6530
35
100
3.5
5827
38
105
3.6
5209
41
110
3.7
4665
43
115
3.8
4184
46
120
3.9
3759
49
125
4.0
3382
52
130
4.1
3048
54
3