Analog Inputs-Auxiliary Control Boards (Ccb1 And Ccb2) - McQuay MicroTech II Installation And Maintenance Manual

Table 8: Analog Inputs for Main Control Board (MCB) - CAV-ZTC (SCC)
Analog Input
MCB-AI1
Zone (Space) Air Temperature
MCB-AI2 Remote Space Temperature Set Point (Optional)
MCB-AI3 Discharge Air Temperature
MCB-AI4 Return Air Temperature
MCB-AI5 Outdoor Air Temperature
MCB-AI6 Mixed Air Temperature
Entering Water Temperature
MCB-AI7
MCB-AI8 Leaving Water Temperature
MCB-AI9 Economizer Position
MCB-AI10 Heating Valve Position
MCB-AI11 Refrigerant Pressure #1
MCB-AI11 Cooling Valve Position
MCB-AI12 Refrigerant Pressure #2
MCB-AI13 Not Used
MCB-AI14 Not Used
MCB-AI15 Not Used
MCB-AI16 Relative Humidity or Dew Point
a. Sensor is required if unit is 100% OA. Otherwise it is optional.
Analog Inputs-Auxiliary Control Boards
(CCB1 and CCB2)
The optional auxiliary control boards (CCB1 and CCB2)
have up to 6 analog inputs.
Note: Only AI5 is used, the other five AI's are not used
and not supported in the application software.
22
Input Description
a
Refer to Table 9 for a description of each analog input on the
CCB1 or CCB2 board.
Table 9: Analog Inputs for Compressor Control Boards
(CCB1 and CCB2)
Analog
AI Jumper
1-RTD
NJ-VAC (No Jumper)
1-RTD
1-RTD
1-RTD
1-RTD
1-RTD
1-RTD
1-RTD
1-RTD
NJ-VDC (No Jumper)
1-RTD
NJ-VDC (No Jumper)
NA
NA
NA
NJ-VDC (No Jumper)
Input Description
Input
AI1 Not Used
AI2 Not Used
AI3 Not Used
AI4 Not Used
AI5 Cool Enable/ Pump Enable
AI6 Not Used
AI Switch
T (OFF)
V (ON)
T (OFF)
T (OFF)
T (OFF)
T (OFF)
T (OFF)
T (OFF)
T (OFF)
T (OFF)
V (ON)
T (OFF)
V (ON)
NA
NA
NA
V (ON)
IM710