62
AGR 070A through 100A
IOMM AGR-1
Digital Inputs
All Digital Inputs are 24 Vac. At 7.5 Vac to 24 Vac the digital input contacts are considered closed.
Below 7.5 Vac, the contracts are considered open. See Table 19 for details and operating
characteristics.
Table 19, Digital Inputs
Input
LED
Description
Circuit
Closed
Open
0
0
Mechanical High Pressure Switch
Circuit #1
Normal
Alarm
1
1
Oil differential switch
Compressor #1
normal
Alarm
2
2
Motor Protection Switch
Compressor #1
Normal
Alarm
3
3
4
4
5
5
System Switch
Unit
Run
Stop
6
6
Phase/Voltage Monitor
Unit
Normal
Alarm
7
7
Pumpdown Switch
Unit
Pmp Dn
Normal
8
8
Mechanical High Pressure Switch
Circuit #2
Normal
Alarm
9
9
Oil Differential Switch
Compressor #2
Normal
Alarm
10
10
Motor Protection Switch
Compressor #2
Normal
Alarm
11
11
12
12
13
13
Chiller Remote Stop Switch
Unit
Run
Stop
14
14
Evap Water Flow Switch
Unit
Run
Stop
15
15
Pumpdown Switch
Circuit #2
Pmp Dn
Normal
Relay Board Outputs
All of the MicroTech panel outputs are controlled by solid-state relays which are driven by the model
250 controller. The controller activates a solid-state relay by sending a “trigger” signal to the output
board via the attached ribbon cable. The relay responds to the trigger by lowering it’s resistance
which allows current to flow through it’s “contacts”. When the controller removes the trigger signal,
the relay’s resistance becomes very high, causing the current flow to stop. The outputs are
individually protected by a 5 amp fuse mounted on the output board adjacent to each relay. Table 20
provides additional information about each output. Refer to the MicroTech Staging schematic for
digital output wiring.
Table 20, Relay Board Outputs
Digital Output
Number
Output
Description
0
Alarm Circuit
1
Chilled Water Pump Relay
2
Liquid Line Solenoid Circuit #1
3
Liquid Line Solenoid Circuit #2
4
Compressor #1 Circuit #1
5
Compressor #2 Circuit #2
6
Compressor #1 Unloader #1
7
Compressor #2 Unloader #1
8
Compressor #1 Unloader #2
9
Compressor #2 Unloader #2
10
Condenser Fan (M11)
11
Condenser Fan (M12)
12
Condenser Fan (M13)
13
Condenser Fan (M21)
14
Condenser Fan (M22)
15
Condenser Fan (M23)
Reset Options
User reset options are located in the “Leaving Water Setpoint” menu. The options are:
None
“None” is the default value and the leaving evaporator water temperature controls the unit.
Return
When selecting “Return” as the reset mode, the controller resets the leaving water temperature set
point as required to maintain the selected return water temperature.
Содержание AGR 070AS
Страница 20: ...20 AGR 070A through 100A IOMM AGR 1 Figure 9 Typical Field Wiring with Global UNT Controller...
Страница 21: ...IOMM AGR 1 AGR 070A through 100A 21 Figure 10 Typical Field Wiring Diagram with MicroTech Controller...
Страница 22: ...22 AGR 070A through 100A IOMM AGR 1 Figure 11 Standard Single Point Connection with FanTrol...
Страница 23: ...IOMM AGR 1 AGR 070A through 100A 23 Figure 12 Standard Single Point Connection with Optional SpeedTrol...
Страница 24: ...24 AGR 070A through 100A IOMM AGR 1 Figure 13 Unit Control Schematic 2 compressor UNT...
Страница 25: ...IOMM AGR 1 AGR 070A through 100A 25 Figure 14 Staging Schematic 2 compressor 4 stage UNT...
Страница 26: ...26 AGR 070A through 100A IOMM AGR 1 Figure 15 Staging Schematic 2 compressor 6 stage UNT...
Страница 27: ...IOMM AGR 1 AGR 070A through 100A 27 Figure 16 MicroTech Controller Schematic...
Страница 28: ...28 AGR 070A through 100A IOMM AGR 1 Figure 17 Unit Control Schematic MicroTech...
Страница 29: ...IOMM AGR 1 AGR 070A through 100A 29 Figure 18 Staging Schematic 4 stage MicroTech...
Страница 30: ...30 AGR 070A through 100A IOMM AGR 1 Figure 19 Staging Schematic 6 stage MicroTech...
Страница 31: ...IOMM AGR 1 AGR 070A through 100A 31 Figure 20 Unit Control Schematic 2 compressor MicroTech...
Страница 32: ...32 AGR 070A through 100A IOMM AGR 1 Figure 21 UNT Instrument Layout See legend on page 34...
Страница 33: ...IOMM AGR 1 AGR 070A through 100A 33 Figure 22 MicroTech Instrument Layout See legend on page 34...
Страница 35: ...IOMM AGR 1 AGR 070A through 100A 35 Figure 25 MicroTech Sensor Layout...
Страница 99: ...IOMM AGR 1 AGR 070A through 100A 99 Notes...
Страница 100: ...Post Office Box 2510 Staunton Virginia 24402 USA 800 432 1342 www mcquay com...