Eubank EAA1036 User Manual

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Eubank EAA/EGA Wall Mount AC Installation & Operation Manual
03/2021 Rev.5
5.2 – Modulating Head Pressure Control
A 10K Nominal NTC Thermistor is connected to the “P1” and “P2” inputs for circuit 1 and circuit 2
respectively. When this sensor is connected, the “FCC IN” is ignored and the thermistor value is used
as the process variable when controlling the head pressure. The controller modulates the Outdoor Fan
Motor to maintain a 90ºF temperature setpoint. The controller will always use the greater value of P1
and P2 input as the reference point. In the event that the Thermistor is disconnected, the controller
reverts to the “FCC IN” input to control the Head Pressure of the system.
5.3– Freeze Stat
A 10K Nominal NTC Thermistor is connected to the “FS1” input on the PCB. If the Thermistor is
not connected, freeze protection will not be provided. If the Thermistor is connected, the control will
provide the freeze protection by turning the compressor Off at a temperature of 35ºF (+/- 2ºF) on the
Indoor Coil. The compressor will remain Off until the temperature measured is greater than 45ºF and
the anti-short cycle time has elapsed.
5.4– Onboard Thermostat
The Onboard Thermostat requires a 10K NTC thermistor to be connected to the “FS2” input. It also
requires that the MODBUS functionality is enabled via MODBUS. The Heating Setpoint, Cooling
Setpoint and Calibration of the sensor has to be congured via MODBUS. Once conguration is
complete, the unit has the capability to function autonomously to maintain the space temperature.
Discrete Registers:
Read with Function Code 02, Write to RW or WO registers with Function Code 05
ID Description Size Data Format R/W
1 Current Status of the Y1 Compressor Call 1 Bit 0 = no call, 1 = call RW
2 Current Status of the Y2 Compressor Call 1 Bit 0 = no call, 1 = call RW
3 Current Status of the Humidity Call 1 Bit 0 = no call, 1 = call RW
4 Current Status of the G Fan Call 1 Bit 0 = no call, 1 = call RW
5 Current Status of the W2 Electric Heating Call 1 Bit 0 = no call, 1 = call RW
6 Current Status of the FCC Call 1 Bit 0 = no call, 1 = call RO
7 High Pressure Switch 1 Status 1 Bit 0 = Open, 1 = Closed RO
8 High Pressure Switch 2 Status 1 Bit 0 = Open, 1 = Closed RO
9 Low Pressure Switch 1 Status 1 Bit 0 = Open, 1 = Closed RO
10 Low Pressure Switch 2 Status 1 Bit 0 = Open, 1 = Closed RO
11 OFM Mode Selection 1 Bit 0 = PWM, 1 = 0-10V RO
12 IFM Mode Selectiion 1 Bit 0 = PWM, 1 = 0-10V RO
13 Test Mode Status 1 Bit
0 = Normal Mode
1 = Test Mode
RO
14 Status of Compressor 1 Relay Output 1 Bit 0 = Off, 1 = Energized RO
15 Status of Compressor 2 Relay Output 1 Bit 0 = Off, 1 = Energized RO
16 Status of RH RelayOutput 1 Bit 0 = Off, 1 = Energized RO
17 Status of W2 RelayOutput 1 Bit 0 = Off, 1 = Energized RO
18 Enables or Disables the internal Thermostat Functionality 1 Bit 0 = Off, 1 = Energized RW
19
Enables or disables reading the thermostat inputs in Modbus
mode
1 Bit
0 = Modbus only
1 = Read thermostat Inputs
Default is 0
RW
Table 7a. MODBUS Discrete Registers

Eubank EAA1036 Specifications

General

Brand	Eubank
Model	EAA1036
Category	Air Conditioner
Language	English