McQuay MicroTech II Installation And Maintenance

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

McQuay MicroTech II Specifications

General

Brand	McQuay
Model	MicroTech II
Category	Controller
Language	English